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AC Drain Hose Mis-Installation — Recall 19V587000 (2020)
warning light; recall notice; repeated dealer repair
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29 NHTSA recalls on the 2020-2026 Mercedes-Benz GLS: 48V battery stalls, fuel pump failures, transmission defects. California lemon law options explained.
You paid somewhere between $87,000 and $175,000 for the 2020-2026 Mercedes-Benz GLS. The badge promises effortless luxury — a three-row German flagship that glides on AIRMATIC air suspension, corners flat on E-Active Body Control, and moves seven occupants with the serene confidence of a jet business class. What many owners discovered instead is a vehicle with one of the most tangled recall histories of any Mercedes-Benz platform in recent memory: 29 NHTSA recall campaigns spanning 2019 through 2024, touching nearly every major system from the airbags and steering coupling to the fuel pump, 48-volt mild-hybrid battery, and AC drain hoses — the last of which required three separate recall campaigns to address.
The X167-generation GLS introduced the new M256 inline-six with 48V EQ Boost mild-hybrid technology alongside the M176 V8, Maybach GLS600 ultra-luxury variant, and AMG GLS63 high-performance trim. That ambition came with growing pains. NHTSA complaints document owners stranded at highway speed when the 48V battery system failed without warning, limiting the vehicle to 15 mph or stalling completely in traffic. Others heard a shotgun-blast sound from above as the panoramic sunroof spontaneously shattered — on the freeway, with children in the car. Still others cycled through three 48V battery replacements, each within warranty, as dealers documented 'cannot duplicate' on repair orders even as fault codes told a different story. Through all of it, the repair orders piled up — and in California, those repair orders are the foundation of a Song-Beverly lemon-law claim.
The issues owners report most, ranked by severity — each one verified against a cited NHTSA source.
warning light; recall notice; repeated dealer repair
warning light; recall notice; repeated dealer repair
sticky steering; steering wheel feels stuck; increased steering effort; steering recall
warning light; recall notice; repeated dealer repair
front suspension noise; stabilizer bar loose; vehicle pulls or clunks
sticky steering; steering wheel feels stuck; increased steering effort; steering recall
A settled Margarian Law case on this exact model, published with the actual settlement math.
Open any defect for the symptoms and why it matters for a California lemon-law claim. Each is tied to a cited NHTSA source.
warning light; recall notice; repeated dealer repair
Recall 19V587000 addresses incorrectly installed AC drain hoses that allow water to accumulate inside the vehicle, risking interior damage and mold growth. If MBUSA completed the recall repair but water intrusion or AC condensation continues — requiring additional dealer visits — the unresolved defect may support a Song-Beverly claim based on repeated unsuccessful repair attempts. Owners should document interior water staining or odor in addition to AC repair orders.
MBUSA will notify owners, and dealers will inspect and correct the air conditioner drain hoses, as necessary, free of charge. The recall began September 6, 2019. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2019080005.
warning light; recall notice; repeated dealer repair
Recall 19V709000 covers rear door window trim that may detach and become a road hazard to other vehicles. A detaching trim piece at highway speed creates a debris projectile risk. Under Song-Beverly, a recall that requires multiple dealer visits to complete — or where the trim detaches again after the fix — satisfies the reasonable-attempts standard. Document each dealer visit with a time-and-mileage record and retain the repair orders showing the specific part replaced.
MBUSA will notify owners, and dealers will inspect and fasten the rear door window trim, as necessary, free of charge. The recall began November 8, 2019. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2019100011.
sticky steering; steering wheel feels stuck; increased steering effort; steering recall
Recall 20V089000 covers a steering-related software defect that could cause increased steering effort or sticky steering under certain conditions. Loss of normal steering feel is a direct safety hazard qualifying as a 'serious safety defect' under California Civil Code §1793.22. Even a single failed repair attempt on a steering defect can support Song-Beverly eligibility. Owners should note if steering feel deteriorates again after the recall software update.
MBUSA will notify owners, and dealers will update the instrument cluster software, free of charge. The recall began March 31, 2020. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2020030019.
warning light; recall notice; repeated dealer repair
Recall 20V172000 covers insufficiently welded seams on the rear crossmember, which may crack under load — a structural integrity defect affecting crash protection. Because the failure mode involves frame cracking that may not be visible without inspection, owners whose vehicles exhibited noise, vibration, or handling changes before the recall notification should request that the dealer inspect for existing cracks. Structural defects found pre-repair can support a broader warranty claim.
MBUSA will notify owners, and dealers will replace the rear crossmember, free of charge. The recall began July 17, 2020. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2020060013.
front suspension noise; stabilizer bar loose; vehicle pulls or clunks
Recall 20V329000 covers premature AIRMATIC strut and shock absorber seal failure causing loss of adaptive suspension function. An AIRMATIC system that collapses or becomes inoperative substantially impairs use of a vehicle marketed on its ride-quality technology. If the recall fix did not restore normal suspension function — or if AIRMATIC faults recur after the repair — Song-Beverly's repair-attempt count resets with each new manifestation of the same system failure.
MBUSA will notify owners, and dealers will replace the front strut assemblies and rear shock absorbers, free of charge. The recall began October 20, 2020. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2020090001.
sticky steering; steering wheel feels stuck; increased steering effort; steering recall
Recall 20V626000 covers an electrical wiring defect in the illuminated Mercedes-Benz star logo that could cause a fire. Any vehicle with a fire-risk wiring defect qualifies as having a 'serious safety hazard' under Song-Beverly §1793.22(e)(2), which reduces the repair-attempt threshold. Owners who experienced the recall before the fix should document any melting plastic, burn smell, or fuse failure as additional evidence of the hazard's actual manifestation.
MBUSA will notify owners, and dealers will relocate the ground connection, free of charge. The recall began November 13, 2020. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2020100015/6.
warning light; recall notice; repeated dealer repair
Recall 21V057000 covers dashboard surface delamination from its base material — a cosmetic defect that does not directly impair vehicle safety or driveability. While standalone cosmetic issues rarely support a Song-Beverly buyback, dashboard delamination repair attempts that fail repeatedly and are combined with other drivability defects on the same vehicle can be tallied as part of a cumulative repair-attempt analysis. Document each dashboard visit alongside other warranty repair orders.
MBUSA will notify owners, and dealers will replace the dashboard, free of charge. The recall began April 16, 2021. Owners may contact MBUSA customer serviced at 1-800-367-6372. MBUSA's number for this recall is 2021030003.
tail light out; exterior light warning; reduced rear visibility
Recall 21V058000 covers a software defect that can cause exterior lighting failure, reducing the vehicle's visibility to other drivers and the driver's field of vision. Non-functional headlights or taillights are a direct safety hazard. Under Song-Beverly, a lighting defect that cannot be resolved with a software update — or that recurs after the update — supports a repair-attempt count toward lemon-law eligibility. Keep repair orders distinguishing between the recall software update and any subsequent hardware replacements.
MBUSA will notify owners, and the communication module software will be updated by a dealer, or through an over-the-air (OTA) update, free of charge. The recall began March 12, 2021. Owners may contact MBUSA customer service at 1-877-762-8267. MBUSA's number for this recall is 2021020025.
warning light; recall notice; repeated dealer repair
Recall 21V071000 covers an Electronic Stability Program software defect that may cause incorrect ESC intervention during evasive maneuvers — exactly the moment when ESC is most needed. Incorrect ESC activation can worsen a vehicle's response to an emergency. Under Song-Beverly, a safety-system software defect that the dealer cannot confirm has been remedied by the update warrants follow-up documentation of any subsequent stability control warning or intervention events.
MBUSA will notify owners, and dealers will update the ESP software, free of charge. The recall began March 31, 2021. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2021030004.
warning light; recall notice; repeated dealer repair
Recall 21V288000 is a second AC drain hose campaign for the 2020 GLS — evidence that the initial 19V587000 remedy did not fully address the installation defect. Two separate AC recall campaigns on the same model year strengthen a Song-Beverly argument that MBUSA had repeated notice of an unresolved manufacturing defect. If interior water accumulation continued after either campaign, owners should document AC-related dealer visits separately from the recall completion records.
Dealers will inspect and correct the air conditioner drain hoses, as necessary, free of charge. Owner notification letters were mailed June 4, 2021. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2021040024.
backup camera blank; screen goes black in reverse; rearview camera distorted
Recall 21V354000 covers rearview camera display failure — a NHTSA-mandated safety system since 2018. Loss of backup camera function has direct backing-accident risk and constitutes a safety defect under federal and California law. If the camera display fails again after the recall software update, owners should insist on hardware replacement rather than a repeat software flash, and document each failure with date, mileage, and dealer response on the repair order.
The multimedia system software will be updated by a dealer, or through an over-the-air (OTA) update, free of charge. Owner notification letters were mailed beginning June 28, 2021. Owners may contact MBUSA customer service at 1-800-367-6373. MBUSA's number for this recall is 2021050012.
airbag warning light; passenger airbag may not deploy; SRS warning; occupant detection fault
Recall 21V771000 covers a software programming error in the airbag control unit that can cause the driver's airbag to deploy improperly in a crash. Airbag non-deployment or incorrect deployment in a collision is among the most serious safety defects recognized by NHTSA and California courts. If a GLS580 owner experienced a collision where airbag deployment was abnormal or absent, the vehicle's pre-collision recall status is directly relevant to any Song-Beverly or negligence claim.
Dealers will replace the air bag control unit, free of charge. Owner notification letters were mailed on October 29, 2021. Owners may contact MBUSA customer service at 1-800-367-6372.
driver seat cushion loose; seat fastener recall; seat may not stay secured
Recall 21V818000 covers incorrectly assembled seats that may not provide proper crash restraint. An improperly secured seat is a structural safety defect — the seat must both support occupants during normal driving and withstand crash loads. NHTSA complaints document a fire originating under the passenger seat on 2021 GLS450 units, which may be related to wiring beneath the seat assembly. Owners who experienced seat-related smoke or fire symptoms should document those events separately from the recall completion record.
Dealers will inspect and repair the seats, as necessary, free of charge. Owner notification letters are expected to be mailed December 8, 2021. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2021110010.
tail light out; exterior light warning; reduced rear visibility
Recall 21V832000 covers rear window glass insufficiently bonded to the vehicle, creating a risk of the window detaching at speed. A detaching rear window is a structural safety defect and a road hazard. If a 2021 GLS owner's rear window showed signs of loosening (air noise, vibration at edges) before the recall notification, those symptoms should be documented as evidence that the defect manifested during the warranty period.
Dealers will replace the rear window, free of charge. Owner notification letters were mailed December 8, 2021. Owners may contact MBUSA customer service at 1-800-367-6372.
warning light; recall notice; repeated dealer repair
Recall 21V961000 covers a fuel rail defect on M256-equipped vehicles that can cause fuel leakage — a fire risk. Fuel system leaks that occur in the engine compartment near ignition sources are classified as Catastrophic fire-risk defects by NHTSA. Under Song-Beverly's serious-safety-hazard provision, a single confirmed fuel leak that the dealer cannot repair on the first attempt may be sufficient to establish lemon-law eligibility without waiting for additional repair attempts.
Dealers will replace the fuel rail and fuel injectors, free of charge. Owner notification letters were mailed April 22, 2022. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for the recall is 2022030003.
warning light; recall notice; repeated dealer repair
Recall 22V231000 covers a ground cable bolt in the 48V subsystem that can cause electrical malfunction — including the loss of EQ Boost function and potential fire risk from arcing. Multiple NHTSA complaints document 48V system failures preceding complete vehicle stalls. If the ground cable fix did not resolve recurring 48V malfunctions, owners should request that each subsequent 48V-related repair be documented with fault codes and part numbers replaced.
Dealers will inspect and tighten the ground cable bolt, as necessary, free of charge. Owner notification letters were mailed July 8, 2022. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2022040017.
backup camera blank; screen goes black in reverse; rearview camera distorted
Recall 22V232000 is a second rearview camera display campaign — evidence that the initial 21V354000 software fix did not fully resolve the underlying failure mode. Two separate camera recall campaigns strengthen a Song-Beverly argument that MBUSA had repeated notice of an unresolved defect. Owners who completed both recall updates and still experience camera display failure should document each occurrence and request hardware replacement rather than additional software flashes.
Dealers will update the rearview camera software, free of charge. Owner notification letters were mailed July 15, 2022. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2022060007.
tail light out; exterior light warning; reduced rear visibility
Recall 22V365000 is a third lighting-software campaign covering 2020-2022 GLS vehicles — a pattern of repeated software remedies for exterior lighting failures across multiple model years. Three separate lighting recall campaigns on the same platform provide strong evidence under Song-Beverly that MBUSA knew of a recurring defect that was not fully remedied. If lighting faults persist after all three campaigns, owners should document the dealer's inability to achieve a permanent fix.
The communication module software will be updated through an Over-the-Air (OTA) update or by a dealer, free of charge. Owner notification letters were mailed July 8, 2022. Owner notification letters will be mailed in phases, on July 8, 2022, May 17, 2024, July 29, 2024, and September 27, 2024. Owner
airbag warning light; passenger airbag may not deploy; SRS warning; occupant detection fault
Recall 22V466000 covers front airbag wiring harness mis-routing that can prevent airbag deployment in a crash. This is a second airbag-system campaign (after 21V771000) for the 2020 GLS — evidence that airbag reliability was a systemic concern on early X167 production. Under Song-Beverly's serious-safety-hazard provision (§1793.22(e)(2)), airbag non-deployment risk establishes a legal presumption of lemon status after a single unremedied repair attempt.
Dealers will correct the wiring harness routing, free of charge. Owners notification letters were mailed August 22, 2022. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2022070006.
warning light; recall notice; repeated dealer repair
Recall 22V680000 covers a body structure defect in the door surround area that can compromise crash protection. Structural frame and body defects that affect occupant protection in a collision are safety defects under federal safety standards and California warranty law. Owners should verify the recall repair is documented with the specific structural section inspected or replaced, not merely a software update, to establish that a meaningful physical remedy was performed.
Dealers will inspect and secure the rear window trim bars, as necessary, free of charge. Owner notification letters were mailed November 1, 2022. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2022090010.
driver seat cushion loose; seat fastener recall; seat may not stay secured
Recall 22V732000 covers third-row seatback locks that may fail in a crash, allowing the seatback to fold forward and potentially injure rear occupants. With the GLS's third row commonly used by children, a seatback lock failure is a critical child-safety defect. Under Song-Beverly, a serious safety hazard affecting juvenile occupants warrants immediate escalation; owners whose third-row seatback showed any movement during normal driving prior to the recall fix should document that symptom as evidence of defect manifestation.
Dealers will inspect and replace the third-row seatback, as necessary, free of charge. Owner notification letters were mailed November 18, 2022. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2022100011.
sticky steering; steering wheel feels stuck; increased steering effort; steering recall
Recall 22V936000 covers the steering coupling locking screw that may loosen and detach, causing a sudden loss of steering control — among the most dangerous possible defects on any vehicle. Loss of steering at speed satisfies the serious-safety-hazard threshold under Song-Beverly §1793.22(e)(2). Any 2022 GLS450 owner who experienced abnormal steering feel, steering wheel play, or steering-related warning lights before the recall notification should document those symptoms as evidence that the defect was active prior to repair.
Dealers will replace the steering coupling locking screw, free of charge. Owner notification letters were mailed January 27, 2023. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2022120016.
warning light; recall notice; repeated dealer repair
Recall 23V177000 is the third separate NHTSA campaign addressing AC drain hose installation defects on 2020-2021 GLS vehicles — the same defect addressed in 19V587000 and 21V288000. Three recall campaigns for a single component-installation defect provide compelling evidence under Song-Beverly that MBUSA's repairs were not effective, supporting a cumulative repair-attempt argument for owners who experienced water intrusion across multiple dealer visits spanning all three campaigns.
Dealers will inspect and reinstall the air conditioner drain hoses, as necessary, free of charge. Owner notification letters were mailed April 28, 2023. Owners may contact MBUSA customer service at 1-800-367-6372. This recall is an expansion of recall numbers 21V-288 and 19V-587. MBUSA's numbers for
warning light; recall notice; repeated dealer repair
Recall 23V178000 extends the trim-detachment campaign to 2022-2023 production, four years after the original 19V709000 recall for 2020 vehicles — evidence that MBUSA did not fully correct the manufacturing defect in later production runs. Under Song-Beverly, a defect that recurs across multiple model years and campaigns demonstrates a systemic manufacturer-known issue that owners of 2022-2023 vehicles can cite to establish the manufacturer's prior knowledge of the defect.
Dealers will inspect and secure the rear window trim bars, as necessary, free of charge. Owner notification letters were mailed May 5, 2023. Owners may contact MBUSA customer service at 1-800-367-6372. This recall is an expansion of previous recall number 22V-680. MBUSA's number for this recall is 2
engine stalls while driving; vehicle will not start; loss of power; fuel pump recall
Recall 23V445000 covers LPFP failure causing stall or no-start risk — a safety defect with direct collision and stranding consequences. NHTSA complaints document owners who received recall notification but could not obtain the repair part for extended periods. Under California law, if recall parts are unavailable for an unreasonable time after notification, owners may have rights under the Song-Beverly Act and the federal Transportation Recall Enhancement Accountability and Documentation (TREAD) Act. Document the notification date and each attempt to schedule the recall repair.
Dealers will replace the fuel pump, free of charge. Owner notification letters were mailed on June 14, 2024. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2023070012.
warning light; recall notice; repeated dealer repair
Recall 23V733000 covers a sunroof software fault (car-wash mode) that causes the panoramic roof to close unexpectedly — a pinch-point injury risk. While the root cause is software-based and the remedy is a control unit update, owners who experienced unexpected sunroof movement injuring an occupant or damaging property should document those incidents. A software-only remedy that does not fully eliminate unintended sunroof closure — confirmed by a post-repair recurrence — would support a Song-Beverly repair-attempt count.
Dealers will update the sunroof control unit software, free of charge. Owner notification letters were mailed December 15, 2023. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2023110007.
engine stalls while driving; vehicle will not start; loss of power; fuel pump recall
Recall 23V880000 is a second LPFP campaign covering 2021-2024 GLS vehicles — evidence that 23V445000 did not fully address the fuel pump defect across the model range. Two LPFP recalls within 12 months demonstrate repeated manufacturer notice of an unresolved safety defect. California consumers who completed the first LPFP recall but still experienced engine stall symptoms before 23V880000 was issued may have a strong argument that MBUSA's remedy was inadequate, supporting a Song-Beverly claim for the intervening service failure.
Dealers will replace the fuel pump, free of charge. Owner notification letters were mailed on June 28, 2024. Owner notification letters will be mailed in phases, on February 23, 2024, April 19, 2024, June 28, 2024, August 9, 2024, October 1, 2024, and December 2, 2024. Owners may contact MBUSA custo
transmission shifts unexpectedly; hesitation; harsh shift; transmission warning
Recall 24V118000 covers 9G-Tronic 725.0 TCU software causing failure to fully downshift, resulting in engine stall in traffic — a drivability hazard with secondary collision risk. Owners who experienced this stall pattern before the recall was issued should document each stall event with date, mileage, traffic conditions, and dealer response. A stall in heavy traffic on the I-405 or similar California highway substantially impairs vehicle use and strengthens a Song-Beverly claim if prior dealer visits failed to diagnose the transmission fault.
Dealers will update the transmission control unit software, free of charge. Owner notification letters were mailed March 29, 2024. Owners may contact MBUSA customer service at 1-800-367-6372.
warning light; recall notice; repeated dealer repair
Recall 24V207000 covers 48V ground connection tightening on the GLS and related models — a fix for loose 48V ground bolts that can cause electrical system faults and vehicle stalls. This recall directly relates to the broader 48V ISG battery failure pattern documented in owner complaints. If a GLS owner completed this recall but continued to experience 48V system failures, the ground cable fix may have addressed only one contributing factor; the pattern of repeated 48V failures across multiple repair visits supports a Song-Beverly cumulative-attempts argument for the same electrical system.
Dealers will inspect and tighten the 48-Volt ground connection as necessary, free of charge. Owner notification letters were mailed on May 3, 2024. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2024040002.
48 volt battery warning light illuminated; vehicle speed limited to 15-30 mph without warning; dashboard displays 'stop vehicle immediately' or 'drive below 50 mph only'; engine stalls in traffic or at highway speed; multimedia system shuts off while driving; repeated 48V battery replacement within warranty period; check engine light after restart; vehicle towed to dealer multiple times
A 48V ISG battery that fails multiple times within the warranty period — each requiring a tow and multi-day dealer visit — satisfies the Song-Beverly 'reasonable number of attempts' threshold when the same system fails on the same vehicle. Because the stall occurs at highway speed, the defect also implicates the vehicle's safety systems, strengthening the claim. California's lemon law covers consequential out-of-service days (§1793.2(b)); owners with three or more 48V-related repair orders should document mileage, dates, and fault codes.
48V battery module replacement (typically 1-3 replacements over vehicle life at failure rate); BMS software update per MBUSA service campaign; dealer 'cannot duplicate' is extremely common on intermittent stalls — insist on written notation of 48V fault codes (B183214, B183216, B183217, B183371) on repair order
loud shotgun or explosion sound from roof at highway speed; sunroof glass shatters with no impact or road debris; glass fragments fall into cabin held by headliner shade; sunroof hole exposes interior to weather; dealer claims no defect / refers to insurance; repeated on replacement glass panels
Spontaneous sunroof shattering at highway speed is a safety defect under Song-Beverly because it creates an immediate loss of structural integrity and projectile risk to occupants. If MBUSA denies warranty coverage on 'stone chip' grounds but the fracture origin is internal (no exterior impact pattern), California consumers can challenge the denial under the implied warranty of merchantability. A second fracture event after replacement glass is installed — particularly within warranty — strongly supports Song-Beverly eligibility.
Full panoramic roof glass panel replacement under warranty or dealer goodwill; Mercedes-Benz has denied warranty coverage in some cases, citing 'stone chip' exclusion; owners who can demonstrate the fracture originated from inside the glass (no impact point on exterior) may compel warranty replacement
instrument cluster / digital speedometer goes black while driving; head-up display turns off simultaneously with cluster; MBUX central screen freezes mid-drive; multimedia system shuts off without warning; cannot see speed, navigation, or alerts; multiple dealer visits with 'no fault found' result; system restores after ignition cycle but recurs
An instrument cluster that blacks out while driving — eliminating speed readout and safety alerts — is more than a cosmetic defect; it impairs the driver's ability to operate the vehicle safely and comply with speed limits. Under Song-Beverly, repeated failure to diagnose or fix an intermittent cluster blackout after three or more dealer visits constitutes a presumptive lemon-law trigger. Owners should request that each visit be documented with the specific symptom and any fault codes stored in the MBUX diagnostic module.
MBUX software update (available via dealer; not OTA for this issue on 2020-2021); central display module replacement in persistent cases; document each occurrence with date, mileage, and photograph of blank cluster on repair order
vehicle sits noticeably lower on one corner or all corners; suspension fault warning on instrument cluster; harsh ride with loss of adaptive damping; AIRMATIC compressor runs continuously; E-Active Body Control fault codes (GLS580 AMG Line); air spring deflation within 12-24 hours of parking; loss of height adjustment function; grinding or hissing from suspension compressor
AIRMATIC suspension failure on a $90,000+ SUV that renders the vehicle's primary ride-quality system inoperative is a substantial impairment of use and value under Song-Beverly. Because the suspension directly affects vehicle handling and safety, repeated failed repair attempts — even if the vehicle technically remains drivable — support a lemon-law claim when the defect recurs within warranty. Owners should note that AIRMATIC components are covered under the comprehensive 4-year/50,000-mile warranty, not the shorter powertrain warranty.
Air spring replacement (one or more corners; $800-1,500 per corner out of warranty); AIRMATIC compressor replacement; E-Active Body Control hydraulic actuator replacement (GLS580 AMG Line); ride-height sensor calibration; under warranty: covered by MBUSA 4-year/50k bumper-to-bumper
transmission stalls at stop after harsh downshift; severe jolt when downshifting from 3rd to 2nd at low speed; transmission warning light illuminated; all dashboard warning lights activate simultaneously; vehicle unable to be shifted to neutral when stalled; harsh engagement from park or reverse; hesitation and surging under light throttle; multiple tows to dealer within first 24 months
A transmission that stalls the engine in traffic — especially when the vehicle cannot be shifted to neutral and requires towing — is a safety-impairing defect that supports a Song-Beverly claim independent of whether the vehicle is named in a formal recall. For GLS580 and AMG GLS63 owners whose vehicles exhibit the same downshift-stall symptoms as the recalled GLS450, the existence of recall 24V118000 provides manufacturer notice of the underlying transmission fault, strengthening the inference that MBUSA knew of the defect and failed to remedy it across all affected variants.
TCU software update (per recall 24V118000 for GLS450); valve body inspection and replacement if solenoid wear detected; GLS580/AMG GLS63 owners should request TCU update check even if not named in recall
brake pads worn to metal at 15,000-25,000 miles; brake dust excessive on rear wheels after 5-10k mi; grinding or squealing from rear brakes; brake warning light before expected service interval; dealer quotes brake replacement as maintenance exclusion; rear rotors warped causing steering wheel vibration under braking
Brake wear is typically a maintenance item excluded from Song-Beverly claims. However, if brake pad replacement is required at abnormally low mileage (under 15,000 miles) on a vehicle never used for towing or track driving, this may constitute a manufacturing defect in the pad compound or brake bias calibration. California warranty law requires that a vehicle's components last for a reasonable service life; pads failing before the first scheduled service interval can support an implied warranty claim if the dealer cannot justify the failure rate.
Brake pad and rotor replacement; MBUSA does not generally cover brake wear under warranty (classified as maintenance); owners who document abnormal wear rate (under 20k mi) may compel goodwill coverage; aftermarket pad upgrade resolves recurrence
third-row seatbelt buckle fails to latch securely; buckle releases without pressing release button; third-row passenger slides forward under braking; dealer replaces latch but failure recurs; power-fold third-row seats fail to lock flat
A seatbelt that appears latched but does not restrain occupants is a life-safety defect. Under Song-Beverly, a single failed repair attempt on a safety-critical restraint system — combined with the 'serious safety hazard' presumption in California Civil Code §1793.22(e) — can establish lemon-law eligibility even before the standard four-visit threshold. Owners should have the dealer document the specific latch part number replaced and request a written confirmation that the belt meets FMVSS 209 retention force standards after repair.
Third-row seatbelt buckle assembly replacement (dealer warranty repair); verify proper latch engagement after replacement by applying firm pulling force to the belt tongue while latched
remedy available
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2023-2024 GLE 350, 2020-2024 GLE 450, 2020-2023 GLS 580, GLE 580, 2019-2023 GLS 450, 2021-2023 Maybach GLS 600, AMG GLS 63, 2021-2024 AMG GLE 53, AMG GLE 53 Coupe, and AMG GLE 63 S vehicles. A 48-Volt ground connection under the passenger seat may not be secured properly, resulting in the ground connection overheating.
remedy available
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2020-2023 GLE 450 and GLS 450 vehicles. The transmission may not fully downshift in certain conditions, causing the engine to stall.
remedy available
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021-2024 GLE, GLS, C-Class, E-Class, S-Class, SL, GLC, CLS, AMG GT, and G-Class vehicles. Please refer to MBUSA's recall report for specific vehicle details. The fuel pump may shutdown, causing a loss of drive power.
remedy available
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2020 GLS580 vehicles. Due to a software error, the sunroof may close unexpectedly when the "car wash mode" is activated. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 118, "Power-operated Window Systems."
remedy available
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021-2023 C-Class, E-Class, S-Class, CLS, SL, GT, GLC, GLE, GLS, and G-Class vehicles. Please refer to MBUSA's recall report for specific vehicle details. The fuel pump may shutdown, which can result in a loss of drive power.
remedy available
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2020-2021 GLE350, GLE450, GLS450, GLS580, 2021 AMG GLE53, AMG GLE63, Maybach GLS600, AMG GLS63, and 2020 GLE580 vehicles. The air conditioner drain hoses may have been incorrectly installed, causing water to drain into the passenger compartment.
remedy available
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2022-2023 GLE350, GLE450, GLE580, GLS450, GLS580, Maybach GLS600, AMG GLE53, AMG GLE63 S, and AMG GLS63 vehicles. The rear door window trim bars may detach from the vehicle while driving.
remedy available
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021-2022 GLE350, GLE450, 2022 AMG GLE53, AMG GLE63, and GLS450 vehicles. The steering coupling locking screw may loosen and possibly detach from the steering gear, resulting in a loss of steering control.
remedy available
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021 AMG GLS63, 2020-2022 GLS450 and GLS580 vehicles. Due to a manufacturing error, the locks on the third-row seatbacks may fail in the event of a crash.
remedy available
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2020-2022 GLE350, GLE450, GLS450, 2021-2022 AMG GLE53, 2020-2021 GLE580, GLS580, and 2021 GLE400e, AMG GLS63, AMG GLE63 S, and Maybach GLS600 vehicles. Due to a manufacturing error, the rear door window trim bars may detach.
remedy available
Mercedes-Benz, LLC (MBUSA) is recalling certain 2020 Mercedes-Benz GLS 450 and GLS 580 vehicles. The front air bag wiring harness may be routed incorrectly, which can cause the air bag not to deploy properly. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 208, "Occupant Crash Protection."
remedy available
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2017-2022 CLA-Class, GLA-Class, GLE-Class, GLS-Class, SLC-Class, A-Class, AMG GT-Class, C-Class, E-Class, S-Class, SL-Class, GLC-Class, CLS-Class, GLB-Class, and G-Class vehicles. Please refer to MBUSA's recall report for specific vehicle model details. An error in the communication module's SIM card software can cause a mobile network connection failure, disabling the emergency call (eCall) system.
remedy available
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2020-2022 GLE450, GLS450, 2021-2022 AMG GLE53, 2020-2021 GLE580, GLS580, 2021 AMG GLE63, Maybach GLS600 and AMG GLS63 vehicles. A ground cable bolt for the 48V ground connection under the front passenger seat may not be secured properly, which can cause the electrical cable to overheat.
remedy available
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2018-2021 CLA-Class, GLE/GLS-Class, A-Class, C-Class, E-Class, E-Class Coupe/Convertible, GLA/GLB-Class, GLC-Class, and CLS-Class vehicles. Please refer to MBUSA's recall report for specific vehicle model details. The rearview camera may not display the rearview image due to a software error. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 111, "Rear Visibility."
remedy available
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2019 AMG G63, C300, E300, G550, AMG GT63, AMG GT53, 2019-2020 A220, GLA250, GLC300, 2016 C300, 2020 AMG A35, AMG C43, AMG C63, CLA250, E350, E450, GLB250, GLE450, GLS450, GLS580, S560, and SL550 vehicles equipped with a gasoline engine. During the manufacturing process, particles may have been trapped between the fuel rail and injectors, which can cause a fuel leak.
remedy available
Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2021 GLE 350, GLE 580, GLS 450, GLS 580, AMG GLE 53, AMG GLE 63 S, and AMG GLS 63 S vehicles. The rear window may be insufficiently bonded to the tailgate, which could allow the rear glass to detach.
remedy available
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2020 GLS450, GLS580, GLE350, GLE450, AMG C63, and 2021 AMG GLE53 vehicles. The seats may have been assembled incorrectly.
remedy available
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2020 GLS 580 vehicles. The air bag control unit software may be programmed incorrectly, which can cause the driver's air bag to deploy improperly.
remedy available
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2019-2021 CLA-Class, GLE/GLS-Class, A-Class, E-Class, E-Class Coupe and Convertible, GLA/GLB-Class, GLC-Class, CLS-Class, and AMG GT-Class 4-door Coupe vehicles. Please refer to MBUSA's recall report for specific vehicle model details. The MBUX multimedia system software may cause the display to remain black, or reboot after startup. This could result in the rearview camera image not displaying properly. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 111, "Rear Visibility."
remedy available
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021 AMG GLE 53, 2020 GLE350, GLE450, GLE580, GLS450, and GLS580 vehicles. The air conditioner drain hoses may have been incorrectly installed, causing water to drain into the passenger compartment.
remedy available
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2020-2021 GLE450, GLE350, and 2020 GLS450, GLE580, GLS580 vehicles. During certain evasive driving maneuvers, the Electronic Stability Program (ESP) software may apply torque to one of the front wheels, pulling the vehicle to one side. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 126, "Electronic Stability Control Systems."
remedy available
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2020 GLS 450, GLE 350, GLE 450, and 2021 AMG GLE53 vehicles. The dashboard surface may not be properly secured to the base material.
remedy available
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2016 - 2021 CLA-Class, GLA-Class, GLE-Class, GLS-Class, SLC-Class, A-Class, GT-Class, C-Class, E-Class, S-Class, CLS-Class, SL-Class, B-Class, GLB-Class, GLC-Class, and G-Class vehicles. Please refer to the Part 573 report for specific vehicle model details. The software design of the communication module may fail to communicate the correct vehicle location for the emergency call system (eCall) in the event of a crash.
remedy available
Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2020 GLE 350, GLE 450, GLE 580, GLS 450, GLS 580 vehicles equipped with an optional illuminated Mercedes-Benz star logo in the front grill. The star logo's electrical ground connection may not be installed properly, potentially affecting the function of other components that share the same ground connection, such as the power steering control unit, wiper motor, and/or the left headlight.
remedy available
Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2020 GLE450, GLS450, and GLS580 vehicles. The sealing of the piston assembly in the front struts and rear shock absorbers may leak and fail prematurely.
remedy available
Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2020 GLE350, GLE450 AND GLS450 vehicles. The seams on the rear crossmember may have been insufficiently welded. This may allow cracks to form when towing, possibly causing the rear crossmember to detach from the vehicle.
remedy available
Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2020 CLA250, CLA250 4MATIC and CLA35 AMG 4MATIC, 2020-2021 GLE350, GLE350 4MATIC, GLE450 4MATIC, GLS450 4MATIC and GLS580 4MATIC and 2021 GLE53 AMG Coupe, GLE63S AMG 4MATIC, GLS63 AMG 4MATIC and Maybach GLS600 4MATIC vehicles. The instrument cluster software may deactivate the illumination of certain interior switches (switch bar, overhead control unit, steering wheel) if the hazard lights are turned on and the ignition switch is in the 'off' position. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 101, "Control and Displays."
remedy available
Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2020 GLE350, GLE350 4MATIC, GLE450 4MATIC, GLS450 4MATIC, and GLS580 4MATIC vehicles. The rear door window trim may detach.
remedy available
Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2020 GLE350, GLE350 4MATIC, GLS450 4MATIC, and GLE450 4MATIC vehicles. The air conditioner drain hoses may have been incorrectly installed, causing water to drain from the air conditioner into the passenger compartment.
Every item below comes from this vehicle's documented defects. The more you recognize, the more a free case review is worth your time.
California's Song-Beverly Consumer Warranty Act applies to every GLS purchased or leased new in California. A manufacturer unable to repair a warranty defect after a reasonable number of attempts must offer a replacement or full refund — down payment, payments, registration, and incidentals. MBUSA pays attorney fees if you prevail.
The 48V battery stall is a safety defect — loss of drive at speed. Civil Code §1793.22 presumes lemon status after four or more repair attempts for the same defect, or 30 cumulative out-of-service days. Three 48V battery replacements within 24 months easily clears that threshold.
The steering coupling recall (22V936000) and both airbag campaigns (21V771000, 22V466000) invoke §1793.22(e)(2) — the 'serious safety hazard' provision that reduces the presumptive threshold to two repair attempts. If those defects were not permanently resolved, you may already qualify.
A repair is 'successful' only if the defect does not recur. Each AIRMATIC failure after a prior fix, and each transmission stall after the TCU update, adds another attempt. Out-of-service days — tow days, parts-wait time — accumulate toward the 30-day rule independently of attempt counts.
General legal information only; no attorney-client relationship formed. Law as of Jun 30, 2026.
“Could not duplicate” doesn't mean the defect isn't real. Here's exactly what to do to protect a potential California lemon-law claim.
Document the moment it happens. Photos, video, and screenshots of any warning lights — with the date and the mileage.
Get a repair order every visit — even “found nothing.” That paperwork is the foundation of a claim.
Check your VIN at nhtsa.gov/recalls. Note any recall that has no available remedy yet.
Track your out-of-service days. California law counts the cumulative days your vehicle spends in the shop.
Keep loaner & rental records. Alternate-transport paperwork during long repairs matters.
Save everything in one place. Symptoms, dates, repair orders, and every repeat visit — the intermittent ones especially.
1. Photo every warning light immediately. The 48V EQ Boost system self-resets after ignition off — dealers clear codes and return the car as 'repaired.' A timestamped photo of the fault message is evidence the dealer cannot dispute.
2. Request the full fault-code printout on every visit — not just the repair summary. For 48V failures, insist the service writer note codes B183214, B183216, B183217, and B183371 on the repair order. These codes establish the battery module — not just the ground bolt addressed in recall 24V207000 — as the root cause.
3. For MBUX / cluster blackout, document date, time, and ambient temperature of each episode. MBUX faults are heat- and load-sensitive; a pattern of afternoon failures gives the dealer a replication protocol they cannot ignore.
4. For AIRMATIC sag, photograph the vehicle at rest from the rear on flat pavement. One corner visibly lower than others is objective evidence the air spring is not holding pressure — documentable without a dealer road test.
5. If the repair order says 'unable to duplicate,' write 'I dispute this finding' before signing. In California, the repair-attempt clock runs even when the dealer says it cannot find the problem — the visit counts.
6. If MBUSA Techline is involved, ask the service advisor to note it on the repair order. Techline involvement is an admission the defect exceeds normal dealer repair capability — exactly the evidence Song-Beverly cases are built on.
7. Keep a personal log — separate from dealer records — of each occurrence: date, mileage, symptom, and out-of-service days. California Civil Code §1793.2(b) allows a buyback after 30 cumulative days out of service, independent of repair-attempt counts.
The X167 GLS has one of the densest recall records of any recent Mercedes-Benz — 29 campaigns in five years, touching airbags, fuel pumps, steering, structure, and the brand-new 48V mild-hybrid system meant to define this generation. Some campaigns are minor. Several are not: two fuel pump recalls, the steering coupling screw, and two airbag campaigns represent life-safety failures on a vehicle costing more than most homes. The 48V battery stall pattern — dozens of NHTSA complaints, no dedicated recall — is the issue we watch most closely. When a $90,000 family hauler strands a parent on the interstate, gets returned after a 'software update,' and stalls again three months later, that is precisely the scenario Song-Beverly was written to address.
— The Margarian Law team
If your 2020-2026 Mercedes-Benz GLS has been to the dealer multiple times for the same problem — a 48V battery stall, AIRMATIC failure, transmission issue, or a safety recall that hasn't been fixed — you may have options under California lemon law. Margarian Law offers a free case review. Your repair orders are the evidence; we know how to read them.
The 2020-2023 GLS 450, GLS 580, and related models use a 48-volt mild-hybrid (EQ Boost) integrated starter-generator system. NHTSA complaints document a widespread pattern of the 48V lithium-ion battery module failing prematurely — triggering warnings like '48V battery malfunction' or 'stop vehicle immediately' and limiting vehicle speed to 15-30 mph or causing a complete engine stall. Recall 24V207000 addresses only a 48V ground connection bolt; the battery module failure pattern itself is broader and owner-reported. Some GLS owners have gone through three battery replacements within two years — all within warranty — only for the same fault codes (B183214, B183217) to return. If your GLS has had two or more 48V battery-related repair visits, ask your service advisor to document the specific fault codes on the repair order and escalate to MBUSA Techline. Repeated failures of the same system within the warranty period may qualify your vehicle under California's lemon law. []
Multiple 2021-2023 GLS owners have reported spontaneous panoramic sunroof glass fracture at highway speed, typically described as a loud 'shotgun' or 'explosion' sound, followed by a hole in the roof with no visible exterior impact. This is consistent with a thermal stress fracture originating inside the glass — not a stone chip. Mercedes-Benz Recall 23V733000 (for 2020 GLS580 only) addresses a software issue that caused the sunroof to close unexpectedly in car-wash mode — it does not cover spontaneous glass fracture on 2021-2023 vehicles. Dealers have in some cases denied warranty coverage by citing a 'stone chip' exclusion; if you can show that the fracture originates from within the glass (no impact mark on the exterior surface), that denial can be contested. If the fracture occurs while driving at highway speed, it is a safety defect. A second fracture event after replacement glass is installed substantially strengthens a lemon-law claim. Document the event with photos of the exterior surface immediately after the fracture. []
Yes — there are two separate NHTSA recall campaigns for Mercedes-Benz GLS fuel pump failure. Recall 23V445000 (issued June 2023) covers 2021-2023 GLS and related models for a low-pressure fuel pump (LPFP) defect causing engine stall or no-start. Recall 23V880000 (issued November 2023) extends coverage to 2021-2024 models after the first campaign did not fully address the defect. The remedy in both cases is fuel pump replacement, but NHTSA complaints document owners who waited months for parts after receiving recall notification — and some experienced a stall before the repair was completed. Under California law, if a safety recall cannot be performed within a reasonable time due to parts unavailability, owners have additional rights beyond the standard warranty. If your GLS is named in either recall and you have not been able to schedule or complete the repair, contact your dealer in writing and keep a record of every scheduling attempt. []
Instrument cluster blackout on the 2020-2022 GLS is a documented MBUX software failure. The MBUX 1.0 and MBUX 2.0 architectures route instrument cluster data through the central display module (CDI). A memory leak or graphics driver fault causes the speedometer, head-up display, and warning indicators to simultaneously drop output while the vehicle is moving. The event is intermittent and typically self-resolves after ignition off — which means dealers often return the vehicle with a 'no fault found' notation after clearing any stored codes. NHTSA complaints document GLS450 owners who visited the dealer three or more times for this failure with no permanent fix. To build your case: note the date, time, and ambient temperature of every occurrence; request the full fault-code printout (not just the service summary) at each visit; and ask the dealer to document the specific MBUX module software version installed after any update. If the cluster blacks out three or more times without a durable fix, you may have a basis for a Song-Beverly lemon-law claim for an unresolved infotainment/safety system defect. []
Yes. NHTSA Recall 24V118000 (issued February 2024) covers 2020-2023 GLS 450 and GLE 450 vehicles for a 9G-Tronic 725.0 transmission software defect. The transmission may fail to fully downshift under certain conditions, causing the engine to stall. MBUSA's remedy is a transmission control unit (TCU) software update performed by a dealer. However, NHTSA complaints document the same stall-at-speed pattern on GLS580 and GLS63 models — which use the same 9G-Tronic hardware but are not named in the recall. If you own a GLS580 or AMG GLS63 and experienced a transmission stall, ask your dealer to check whether a TCU update is available for your specific variant. For GLS450 owners: if the stall recurs after the TCU software update, document the recurrence with the date, mileage, and traffic conditions. A transmission that stalls in traffic after a recall fix — requiring a tow — satisfies the Song-Beverly 'reasonable number of repair attempts' standard. []
Possibly, yes. California's Song-Beverly Consumer Warranty Act covers any new vehicle purchased or leased in California with a defect that the manufacturer has been unable to repair after a reasonable number of attempts. The 2020-2026 GLS has 29 separate NHTSA recall campaigns — a level of recall density that is itself evidence of systemic manufacturing defects. If your GLS has had four or more warranty repair visits for the same issue (or two or more for a serious safety defect like the steering coupling, airbag wiring, or 48V battery stall), you may qualify for a replacement vehicle or full refund under the Song-Beverly presumption. The 30-cumulative-days-out-of-service rule is a separate path: if your vehicle spent 30 or more days in the dealer's possession for warranty repairs — across any combination of issues — that alone can support a lemon claim. To evaluate your specific situation, gather every repair order from every dealer visit, note the dates the car was dropped off and picked up, and identify which of the 29 recall campaigns have been performed on your VIN. []
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