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Fuel Rail / Fuel Injector Leak — Fire Risk — Recall 21V961 (2020)
warning light; recall notice; repeated dealer repair
Catastrophic2020
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Mercedes-Benz GLB: 24 NHTSA recalls, M260 engine defects, 8G-DCT transmission issues, MBUX failures. Know your California lemon-law rights. Free review.
You paid a premium for a premium promise. The Mercedes-Benz GLB 250 — compact, three-row capable, draped in Stuttgart's star — arrived for 2020 as the brand's accessible-luxury play for families who refuse to compromise. It was the first seven-seat compact SUV Mercedes built for the American market, riding the MFA2 platform shared with the A-Class, CLA, and GLA. MBUX's voice-first infotainment, the 2.0-liter M260 turbo four, and an 8-speed dual-clutch transmission completed a package that reads as modern, efficient, and refined.
The early production reality has not matched that promise. NHTSA has logged 24 safety recall campaigns in six model years — an extraordinary density. Six airbag recalls affect MY2020-2021 vehicles; two backup camera campaigns were needed because the first did not fully fix the problem; front axle carrier corrosion fractured on at least one 2020 GLB while driving; a fuel injector leak created a fire risk that materialized for at least one owner.
Beyond formal recalls, NHTSA complaints document engine misfires requiring cylinder head replacement at 40,000–55,000 miles — acknowledged by MBUSA in August 2023 with a 15-year/150,000-mile exhaust valve warranty extension. The 8G-DCT shudders, jerks, and enters limp mode at highway speed; ODI 11742901 shows a dealer acknowledging 'software is in preparation' with MBUSA offering only a buyback. The MBUX head unit freezes — dark screen or stuck welcome animation — addressed by TSB LI82.85-P-069381. The power liftgate trapped at least one owner, causing injury.
For GLB owners who have cycled through dealer visits without resolution, the California lemon-law path is often the most efficient route to accountability.
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
tail light out; exterior light warning; reduced rear visibility
driver seat cushion loose; seat fastener recall; seat may not stay secured
airbag warning light; passenger airbag may not deploy; SRS warning; occupant detection fault
tail light out; exterior light warning; reduced rear visibility
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 20V246000 addresses water intrusion into the A-pillar structural area of 2020 GLB 250 vehicles, which can corrode load-bearing components and compromise crash-protection integrity over time. Under Song-Beverly, a structural safety recall that requires inspection and correction after purchase is a manufacturer-acknowledged defect; if the dealer's repair fails to permanently seal the water path and the owner returns for repeat treatment, those visits count toward the statutory repair-attempt threshold. Water intrusion also risks secondary electrical and airbag module damage, which may compound the claim.
MBUSA will notify owners, and dealers will seal the vehicle body in the wheel well area and inspect the front foot wells for water intrusion, repairing as necessary, free of charge. The recall began July 31, 2020. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this r
tail light out; exterior light warning; reduced rear visibility
Recall 20V480000 addresses an exterior lighting defect on 2020 GLB 250 vehicles where a software condition can affect headlight operation. Headlight failures directly impair nighttime visibility and constitute a safety-relevant defect under California law. If the dealer's software update fails to permanently resolve the headlight issue and the owner returns repeatedly, those repair attempts support a Song-Beverly claim even though the vehicle remained drivable.
MBUSA will notify owners, and dealers will inspect the rear spoiler and replace it, if necessary, free of charge. The recall began October 23, 2020. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2020090006.
driver seat cushion loose; seat fastener recall; seat may not stay secured
Recall 20V558000 addresses second-row seat misalignment in the track on 2020 GLB 250 vehicles that may prevent the seat from properly locking, creating an occupant ejection risk in a collision. An unlatched seat is a safety defect affecting any occupant in that seating position. If the dealer's inspection and correction fails to hold—for example, if the seat later exhibits movement or the fastener loosens again—repeat visits for the same seat condition support a Song-Beverly repair pattern.
MBUSA will notify owners, and dealers will inspect the installation of the second row seat and correct it, if necessary, free of charge. The recall began October 23, 2020. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2020090020.
airbag warning light; passenger airbag may not deploy; SRS warning; occupant detection fault
Recall 20V628000 addresses a side/window curtain airbag deployment failure risk on 2020 GLB 250 vehicles. Airbag non-deployment in a side-impact crash is a life-threatening safety defect. Under Song-Beverly, an airbag recall repair that is performed but subsequently found ineffective—or where the same airbag system generates repeat warnings—creates a strong statutory repair-attempt record given the severity of potential harm.
MBUSA will notify owners, and dealers will check the mounting of the window air bag and correct it as necessary, free of charge. The recall began October 30, 2020. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2020100010.
tail light out; exterior light warning; reduced rear visibility
Recall 21V058000 addresses an electrical system software defect in the communication module that affects exterior lighting functions on 2020-2021 GLB vehicles. This recall also disables the emergency call (eCall) system, which is a secondary safety impairment. Owners who experienced eCall failures, lighting anomalies, or communication module malfunctions across multiple dealer visits—before or after the recall remedy—have a documented defect pattern relevant to Song-Beverly.
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.
tail light out; exterior light warning; reduced rear visibility
Recall 21V231000 addresses tailgate spoilers that may not have been correctly installed on 2020-2021 GLB 250 and GLB 35 AMG vehicles, creating a road hazard risk if the spoiler detaches at speed. A detached spoiler at highway speed poses a direct danger to following vehicles. Owners with multiple dealer visits related to the tailgate or spoiler—including owners who combine this concern with liftgate sensor issues—should document each visit as part of a cumulative Song-Beverly repair record.
MBUSA will notify owners, and dealers will inspect and, if necessary, replace the side spoilers, free of charge. Owner letters were mailed July 2, 2021. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2021050009.
warning light; recall notice; repeated dealer repair
Recall 21V232000 addresses a structural body defect on 2020-2021 GLB 250 vehicles. Structural integrity defects that affect the vehicle's occupant protection zone are among the most serious defects under Song-Beverly because they bear directly on crash survivability. If the dealer's recall remedy—typically inspection and weld or panel correction—proves insufficient and the same structural issue recurs, each return visit strengthens a California lemon-law claim.
MBUSA will notify owners, and dealers will check the installation of the front wheel arch covers and correct them as necessary, free of charge. Owner letters were mailed May 21, 2021. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2021040015.
backup camera blank; screen goes black in reverse; rearview camera distorted
Recall 21V354000 addresses a rearview camera display failure on 2020-2021 GLB vehicles where the camera image may not appear on the MBUX screen, violating FMVSS 111 rear visibility requirements. A non-functional backup camera is a federally mandated safety feature; its failure is a legally cognizable defect. Because the MBUX system integrates backup camera with the infotainment head unit, owners who also experienced MBUX freeze (see iss-27) may have compounding defect claims where multiple systems fail through a shared root cause.
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.
warning light; recall notice; repeated dealer repair
Recall 21V403000 is a second water-intrusion structural recall affecting 2020 GLB 250 vehicles, indicating that the original 20V246000 remedy did not fully address the problem for all affected units. When a manufacturer issues a second recall for the same general defect category on the same model year, it establishes that the first repair attempt was systemically insufficient. Under Song-Beverly, owners who received the 20V246000 remedy and then were subject to 21V403000 have a documented two-attempt repair history for the structural water intrusion defect.
Dealers will seal the vehicle body in the wheel well area and inspect the front foot wells for water intrusion, repairing as necessary, free of charge. Owner notification letters were mailed July 20, 2021. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is
airbag warning light; passenger airbag may not deploy; SRS warning; occupant detection fault
Recall 21V404000 is a second airbag recall for 2020 GLB 250 vehicles, addressing the side/window curtain airbag non-deployment risk. Combined with recall 20V628000 (iss-04), this represents two NHTSA campaigns addressing the same airbag system on the same vehicle—a pattern that can be argued as two separate repair attempts for a related defect under Song-Beverly. Any owner whose airbag system required attention under both campaigns has a documented multi-attempt repair history.
Dealers will replace the side curtain air bags, free of charge. Owner notification letters were mailed on September 24, 2021. Owners may contact MBUSA customer service at 1-800-367-6372.
airbag warning light; passenger airbag may not deploy; SRS warning; occupant detection fault
Recall 21V405000 addresses a passenger-side frontal airbag deployment failure on 2020 GLB 250 vehicles distinct from the curtain airbag recalls (iss-04, iss-10). Three separate airbag recalls affecting a single model year vehicle is highly unusual and establishes a systemic restraint system defect pattern. Under Song-Beverly, an owner whose vehicle required airbag recall repairs under all three campaigns (iss-04, iss-10, iss-11) effectively has three repair attempts on the restraint system—a compelling basis for a Song-Beverly claim.
Dealers will replace the front passenger air bag module, free of charge. Owner notification letters were mailed July 16, 2021. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2021060011.
tail light out; exterior light warning; reduced rear visibility
Recall 21V509000 addresses a headlight defect on 2020 GLB vehicles related to headlight leveling or software. This is the third lighting-related recall affecting 2020 GLB vehicles (see also iss-02, iss-05). For owners who received software updates under multiple lighting recalls without permanent resolution of illumination complaints, the cumulative dealer visits across all three campaigns may collectively satisfy the Song-Beverly repair-attempt threshold for a lighting system defect.
Dealers will replace the LED headlights, free of charge. Interim letters notifying owners of the safety risk were mailed August 13, 2021. A second notice will be sent once the remedy is available. Owner notification letters were mailed January 2022. Owners may contact MBUSA customer service at 1-800
warning light; recall notice; repeated dealer repair
Recall 21V526000 addresses an accessory power outlet, USB, or connector wiring defect on 2020 GLB 250 vehicles that may cause electrical system abnormalities. While an inoperative USB port alone may not constitute a substantial impairment, if the wiring connector defect causes broader electrical anomalies—such as MBUX resets or communication module faults—the impairment severity increases. Owners who experienced recurring electrical gremlins traceable to this wiring area should document whether the recall remedy fully resolved the condition.
Dealers will inspect and replace the voltage converter, as necessary, free of charge. Owner notification letters were mailed on September 3, 2021. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2021080005.
airbag warning light; passenger airbag may not deploy; SRS warning; occupant detection fault
Recall 21V639000 addresses a software defect in the airbag and restraint control module on 2020 GLB 250 vehicles that may prevent correct airbag deployment. This is the fourth airbag-related recall affecting 2020 GLB 250 vehicles (alongside iss-04, iss-10, iss-11). Four airbag recalls on a single vehicle model year is strong evidence of a systemic restraint system design or production defect under Song-Beverly; each recall repair constitutes a separate repair attempt that cumulatively builds a lemon-law claim.
Dealers will update the air bag control unit software, free of charge. Owner notification letters were mailed on September 17, 2021. Owners may contact MBUSA customer service at 1-800-367-6372.
airbag warning light; passenger airbag may not deploy; SRS warning; occupant detection fault
Recall 21V860000 addresses a side/window airbag non-deployment risk on 2021 GLB 250 and AMG GLB 35 vehicles. This recall carried the airbag defect pattern forward into the 2021 model year, indicating that the underlying manufacturing or calibration issue was not resolved between production runs. Under Song-Beverly, a 2021 GLB owner who had the airbag system addressed under this recall and subsequently experienced additional airbag warning lights or SRS system alerts has a documented repair history.
Dealers will inspect the mounting of the driver-side window air bag and repair it as necessary, free of charge. Owner notification letters were mailed December 2021. Owners may contact MBUSA customer service at 1-800-367-6372.
warning light; recall notice; repeated dealer repair
Recall 21V961000 addresses a fuel rail-to-injector leak on 2020 GLB 250 vehicles caused by trapped manufacturing particles; a fuel leak near ignition sources presents a fire risk. NHTSA complaint ODI 11717145 documents an actual engine fire on a 2020 GLB with no prior warning. Under Song-Beverly, a fire-risk recall is among the most serious defects; if a 2020 GLB owner experienced any fuel smell, CEL related to fuel pressure, or required fuel system service before or after the recall repair, those visits build a lemon-law record for a Catastrophic-severity defect.
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.
front suspension noise; stabilizer bar loose; vehicle pulls or clunks
Recall 21V990000 addresses front axle integral carrier corrosion on 2020 GLB 250 and AMG GLB 35 vehicles that can cause carrier failure and loss of steering control. NHTSA complaint ODI 11451402 documents a front axle fracture during driving. A suspension failure causing loss of vehicle control is a direct safety hazard. Owners who had the integral carrier inspected but later experienced suspension noise, vibration, or handling abnormalities should return to the dealer and document those complaints as potentially related to the same defect.
Dealers will inspect and replace the integral carrier, as necessary, free of charge. Owner notification letters were mailed July 29, 2022. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2022070009.
airbag warning light; passenger airbag may not deploy; SRS warning; occupant detection fault
Recall 22V078000 addresses frontal airbag non-deployment on 2021 GLB 250 vehicles, continuing a multi-year airbag defect pattern established across 2020 MY recalls (iss-04, iss-10, iss-11, iss-14). This establishes that the restraint system production defect persisted into MY2021. A 2021 GLB owner who had the airbag system addressed under this recall and experienced additional restraint system warnings or SRS light illuminations has a documented repair history under Song-Beverly.
Dealers will inspect and replace the front driver's air bag, as necessary, free of charge. Owner notification letters were mailed March 25, 2022. Owners may contact MBUSA customer service at 1-800-367-6372.
backup camera blank; screen goes black in reverse; rearview camera distorted
Recall 22V232000 is the second NHTSA campaign addressing backup camera display failures on 2020-2021 GLB vehicles, following 21V354000 (iss-08). Two recall campaigns for the same backup camera non-compliance means owners have two manufacturer-acknowledged repair events on their vehicle's rear-visibility system. Owners who received both recall remedies but still experienced backup camera intermittency or MBUX display failures likely have a systemic infotainment/camera defect beyond what either campaign resolved.
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.
front suspension noise; stabilizer bar loose; vehicle pulls or clunks
Recall 22V314000 addresses a rear axle level sensor linkage that may not have been correctly installed on 2021 GLB 250 vehicles, affecting headlight leveling accuracy. While primarily a compliance issue, incorrect headlight leveling can impair nighttime visibility and constitute a safety defect in practice. If the recall repair did not fully restore correct headlight pointing, or if the sensor linkage failed again after repair, those conditions are documented Song-Beverly repair attempts.
Dealers will inspect and repair the level sensor linkage, as necessary, free of charge. Owner notification letters were mailed June 10, 2022. Owners may contact MBUSA customer service at 1-800-367-6372.
tail light out; exterior light warning; reduced rear visibility
Recall 22V365000 addresses a software defect in the communication module that disables the emergency call (eCall) system on 2020-2021 GLB vehicles — this is a second eCall-related software campaign (see also iss-05). A disabled eCall system means the vehicle cannot automatically contact emergency services after a crash — a meaningful safety impairment. Owners affected by both eCall recall campaigns should ensure their dealer records show both software updates were successfully applied, as unresolved eCall failures compound other restraint system concerns.
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
brake pedal problem; reduced braking; unexpected braking; brake warning light
Recall 22V679000 addresses moisture ingress into the Electronic Stability Program (ESP) unit on 2021 GLB 250 vehicles, potentially disabling ABS, ESC, and causing an electrical short circuit. Loss of ABS and ESC in a panic stop or slippery road condition can cause a crash; this is a direct safety defect. Owners who experienced any brake warning lights, ESP/ABS error messages, or unusual braking behavior—even if intermittent and unrelated to this specific recall—should document all brake system visits, as the shared module may be involved.
Dealers will replace the ESP unit, free of charge. Owner notification letters were mailed October 28, 2022. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2022090009.
brake pedal problem; reduced braking; unexpected braking; brake warning light
Recall 23V732000 addresses the absence of a rear brake pad inspection gauge in certain 2020 GLB 250 vehicles, meaning brake wear may not be detectable without removing the wheel. Although the remedy (gauge installation and supplemental manual information) is straightforward, the recall establishes that MBUSA delivered a vehicle with an incomplete brake maintenance provision. Owners who experienced premature brake wear (see iss-32) and whose brake condition was not detected early due to the missing gauge have a compounding claim: the missing gauge directly contributed to delayed diagnosis of a brake defect.
Dealers will install an inspection gauge and provide supplemental owner's manual information, free of charge. Owner notification letters were mailed on February 29, 2024. Owners may contact MBUSA customer service at 1-800-367-6372.
warning light; recall notice; repeated dealer repair
Recall 24V780000 addresses a tire sidewall defect on 2025 GLB 250 and GLB 250 4MATIC vehicles that may lead to tire failure. A tire sidewall failure at speed can cause rapid deflation and loss of vehicle control, placing this firmly in the safety defect category. As this is the most recent recall and affects the current production year, 2025 GLB owners who purchased their vehicle and then received this recall notification should document the recall date relative to delivery date, as a defect present at sale is the clearest basis for a Song-Beverly claim.
Dealers will inspect and replace the tires as necessary, free of charge. Owner notification letters were mailed November 22, 2024. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2024100014.
Harsh or jerky gear changes at low to moderate speeds; transmission shudder or vibration when accelerating from a stop; vehicle enters limp mode with transmission malfunction warning at highway speed; transmission slips into neutral unexpectedly while driving; lurching or stumble during 1-2 and 2-3 upshifts; temporary loss of acceleration requiring engine restart to restore normal drive; multiple dealer visits with 'no fault found' or 'software in preparation' response; dealer offers buyback as only resolution
Under California's Song-Beverly Act, a transmission defect that causes loss of drive, limp mode, or unexpected neutral engagement at highway speed qualifies as a substantial impairment of use, value, or safety. Where the dealer acknowledges a software defect is 'in preparation' without a fix timeline, each return visit without resolution counts toward the statutory repair-attempt threshold. Owners who have returned three or more times for the same 8G-DCT shudder or limp-mode condition—or who have been offered a buyback by MBUSA directly—likely have a ripe Song-Beverly claim.
Transmission control module (TCM) software update via XENTRY Diagnosis; if shudder persists after TCU update, valve body inspection and replacement may be required; some owners report MBUSA offering vehicle repurchase when software update fails to resolve recurring limp mode events
Check engine light (MIL) illuminated with misfire codes; engine misfires on one or more cylinders; rough idle or hesitation under load; loss of power during acceleration; repeated cylinder head replacement at 40,000–55,000 miles; dealer diagnosis of exhaust valve guide wear or seat ring failure; engine knock or ticking from the cylinder head area; combustion misfire fault codes P030085 / P030x85 / P1CEF85 / P1CE577 stored
MBUSA's acknowledgment of the M260 exhaust valve defect via a 15-year/150,000-mile emission extended warranty is a manufacturer concession that the engine has a latent defect. Under Song-Beverly, if an owner experienced misfire-related drivability loss and made multiple dealer visits before the August 2023 warranty extension—especially if warranty coverage was initially denied—those failed repair attempts may count toward the lemon-law threshold. The extended coverage window does not extinguish prior Song-Beverly rights, and owners who incurred out-of-pocket costs have a separate reimbursement pathway through MBUSA.
Exhaust valve and/or cylinder head replacement covered under MBUSA Emission Extended Warranty to 15 years/150,000 miles; repair requires Quick Test upload with applicable fault codes; owners who paid out-of-pocket before August 2023 may seek reimbursement from MBUSA
Head unit display remains black after ignition; MBUX screen stuck on Mercedes-Benz welcome animation; infotainment frozen and unresponsive to touch; no audio output or speaker interference noise alongside blank display; DTC B19C804 'Software tampering was detected. There is an internal fault.' stored in MBUX control unit; infotainment requires forced restart by holding power button; condition recurs after multiple dealer software updates; wireless Apple CarPlay drops or fails to launch after MBUX freeze
Although an infotainment freeze is Functional-severity in isolation, Song-Beverly does not require a safety defect—it requires a defect that substantially impairs use or value. A premium vehicle's navigation, emergency call (eCall), parking camera, and driver-assist displays all route through MBUX, making repeated freeze events a meaningful impairment. Owners who have had the MBUX software re-flashed three or more times without lasting resolution have a plausible lemon-law pattern, particularly if the dealer's visit records reference the same DTC B19C804.
MBUX software update to version E820.0 or greater via XENTRY Diagnosis (Op. no. 87100 DH); if freeze recurs after update, dealer should verify code 548/549 validity and re-flash; in rare cases, head unit (A26/17) replacement may be required
Check engine malfunction indicator lamp (MIL) illuminates without drivability complaint; DTC P146364 or P146264 stored in engine control unit and/or fuel pump control unit; dealer clears code but MIL returns within days or weeks; no apparent fuel pressure or temperature anomaly observable at idle; emission inspection failure due to stored MIL
A persistently illuminated check engine light causes the vehicle to fail California emissions smog checks, rendering it legally unregisterable. Under Song-Beverly, repeated unsuccessful dealer visits for the same MIL/fault-code condition—particularly where the root cause was a known software defect MBUSA later covered under an extended warranty—may establish the statutory repair attempt count. Owners who encountered denied warranty coverage before April 2024 and made multiple dealer trips should document each visit carefully.
FSCM software update to calibration A0009026661 for Fuel System Control Module N118 via XENTRY Diagnosis; covered under MBUSA Emission Extended Warranty to 15 years/150,000 miles; owners who paid for prior FSCM diagnostics or replacement before the April 2024 warranty extension may seek reimbursement
Water dripping from headliner or A-pillar after rain or car wash; panoramic sunroof drain tubes blocked by debris; wet footwell carpet or rear cargo area after precipitation; mold or mildew odor from HVAC vents or cabin headliner; sunroof glass spontaneous crack or shattering at highway speed (ODI 11438054, 11443522); electrical shorts or infotainment failure following water intrusion; water visible in sunroof tray overflow during heavy rain
Sunroof water intrusion that leads to recurring mold/mildew odor, wet carpeting, or headliner replacement across multiple dealer visits qualifies as a defect impairing use or value under Song-Beverly. If water damage triggers secondary electrical failures—particularly to the MBUX system, overhead controls, or safety-related modules—the compounding impairment strengthens the claim. Owners who have had headliners or drain systems addressed two or more times for the same underlying drainage defect should document each repair order precisely.
Dealer cleaning of all four sunroof drain tubes; inspection and replacement of headliner if saturated; headliner water damage and electrical shorts covered under New Vehicle Limited Warranty if within 4 years/50,000 miles; sunroof glass replacement if cracked or shattered
Power liftgate refuses to open or close on command; liftgate descends unexpectedly while person is reaching into cargo area; liftgate opens only 10-12 inches and stops; liftgate sensor falsely detects obstruction and reverses before fully open; liftgate operates intermittently — works in some temperatures but not others; warning chime with no liftgate response; occupant partially trapped by unexpected liftgate closure
A liftgate that descends unexpectedly and traps a person presents a safety risk that elevates this issue beyond mere inconvenience under Song-Beverly. Even if the liftgate is classified as a convenience feature, repeated failed repair attempts—particularly where the dealer refuses to service a related open recall—create a viable lemon-law timeline. MBUSA's recall 21V231000 already addressed a tailgate spoiler detachment on 2020-2021 GLBs; owners with combined liftgate and spoiler issues should ensure both are documented on the same repair orders.
Liftgate sensor recalibration or replacement; liftgate motor or gas strut replacement if mechanical failure confirmed; software update if sensor threshold calibration is the root cause; covered under New Vehicle Limited Warranty within 4 years/50,000 miles
EPB warning light illuminated with 'See Owner's Manual' message; electric parking brake fails to engage or release on command; vehicle rolls slightly after parking on a grade despite EPB indicator showing engaged; EPB engages automatically and unexpectedly at low speed; dealer unable to reproduce fault in controlled conditions (intermittent); fault clears and returns without pattern
An inoperative or unreliable parking brake is a safety defect under California law because an unintended vehicle rollaway can cause injury or property damage. If the EPB fault co-occurs with the ESP moisture-intrusion issue covered by recall 22V679000, the compound brake system impairment strengthens a Song-Beverly claim. Owners who have returned to the dealer multiple times for EPB warnings that clear between visits should request that each visit be documented even when no fault is found, as the 'cannot duplicate' pattern is itself relevant evidence.
EPB actuator harness connector inspection and reseat; actuator replacement if fault persists; ESP module inspection for moisture ingress (see recall 22V679000); software update if EPB control logic calibration is involved
Front brake pads worn before 20,000 miles under normal driving; grinding or squealing noise during slow stops; brake noise persists after dealer pad replacement; excessive brake dust on front wheels; front rotor replacement needed at unusually low mileage; brake wear sensor warning illuminated earlier than expected
Premature brake wear that recurs across multiple dealer visits despite pad replacement points to a systemic design or specification defect rather than normal wear. Under Song-Beverly, brake system defects that substantially impair safety—or that require repair so frequently as to impair vehicle use—support a lemon-law claim even if the vehicle is otherwise drivable. Owners who have had front pads replaced two or more times before 40,000 miles, with dealer visit records showing the same complaint each time, should document whether the dealer cited warranty coverage or classified the wear as 'normal.'
Front brake pad and rotor replacement; dealer may upgrade to performance-compound pads if OEM compound fails repeatedly; covered under warranty if below 4 years/50,000 miles; some owners pay out-of-pocket after mileage thresholds are contested by dealers
Musty or mold/mildew odor from HVAC vents, especially after A/C use; odor returns within weeks of dealer sanitizing treatment; smoke or burning smell from vents when switching to cabin-air mode; air blows from incorrect vents despite correct mode selection; fan runs but no airflow from selected vent zone (blend door stuck); clicking noise behind dashboard during temperature changes; A/C cooling inconsistent between driver and passenger zones
While HVAC odor alone may seem minor, recurring mold after dealer cleaning constitutes a defect impairing vehicle value and the health/comfort of occupants. Under Song-Beverly, California owners do not need a safety-threatening defect—any substantial impairment of use or value qualifies. If the dealer has performed HVAC sanitizing two or more times without permanent resolution, or if a blend door actuator has been replaced and the airflow fault returns, the pattern supports a Song-Beverly repair-attempt count.
Evaporator core cleaning and cabin air filter replacement; HVAC system sanitizing via UV or chemical treatment; blend door actuator replacement if airflow zones are incorrect; covered under warranty within 4 years/50,000 miles; recurring mold may require evaporator replacement in severe cases
comfort functions misbehave when exiting (e.g. radio or lights stay on after door opens); electronic parking brake / Auto-Park fails to engage automatically on driver door open; vehicle rollaway
A silent parking-brake non-engagement defect creates rollaway risk with no owner-available remedy until September 2026 — a documented period where the defect cannot be repaired. Pre-recall complaints about door-lock or parking-brake behavior without a lasting fix form relevant repair history under California lemon law.
Dealers will replace the driver's door lock, free of charge. Owner notification letters are expected to be mailed September 18, 2026. Owners may contact MBUSA customer service at 1-800-367-6372. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on NHTSA.gov beginning July 31, 2026.
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Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2020-2021 CLA, 2019-2022 A-Class, 2022-2023 C-Class, 2024 CLE, 2020-2026 GLA/GLB, and 2023-2024 GLC vehicles. The micro-switch in the driver's door lock may corrode and fail to detect an open door, preventing the electronic parking brake or "Auto-Park" feature from engaging automatically. This may result in a vehicle rollaway.
remedy available
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2025 GLB 250, GLB 250 4MATIC, and GLB 35 4MATIC vehicles. The right-side front and rear tires may have sidewall damage, which can result in a sudden loss of tire pressure.
remedy available
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2019-2020 A220, 2020 CLA250, GLB250, AMG A35, AMG CLA45, AMG CLA35, and 2021 GLA250 vehicles. The vehicles may not be equipped with an inspection gauge to check the wear of the rear brake pads. In addition, information for using this inspection gauge might not be included in the owner's manual. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 135, "Light Vehicle Brake Systems."
remedy available
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021 GLB250 vehicles. The Electronic Stability Program (ESP) unit may be damaged, which can result in disabled anti-lock brakes (ABS), disabled electronic stability control (ESC), and an electrical short circuit.
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 2021 GLB 250 vehicles. The level sensor linkage on the rear axle might not have been installed properly, which could affect the headlight leveling function. MBUSA's number for this recall is 2022050011.
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 2021 GLB 250 vehicles. These vehicles may be equipped with an incorrect front driver's air bag module.
remedy available
Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2021 AMG GLB35, 2019-2020 A220, and 2020 GLB250 vehicles. The integral carrier that supports the front axle may corrode, causing it to fail.
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 GLB 250 and AMG GLB 35 vehicles. The driver-side window air bag may not have been mounted correctly to the lower area of the A-pillar. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 226, "Ejection Mitigation."
remedy available
Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2020 GLB250 vehicles. In the event of a crash, the air bag control unit software may not activate the front seat belts and front passenger air bag properly.
remedy available
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2020 GLB 250 vehicles. The accessory power outlet for the second-row seating may have excessive voltage due to an incorrect voltage converter socket.
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Mercedes-Benz LLC (MBUSA) is recalling certain 2018-2020 C300, 2019-2020 A220, AMG C43, AMG C63, 2020 GLE580, GLB250, 2020-2021 GLE450, GLE350, 2021 AMG GLE63, and AMG GLE53 vehicles. The LED headlights may have been incorrectly adjusted during a vehicle repair. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 108, "Lamps, Reflective Devices, and Associated Equipment."
remedy available
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2020 GLB250 vehicles. Water may enter through the wheel well area into the front occupant foot wells, potentially damaging certain electrical components. This may result in the instrument cluster going blank, an engine stall while driving, or the vehicle may not start.
remedy available
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2020 GLB250 vehicles. The side curtain air bags may not deploy properly during a crash.
remedy available
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2020 GLB250 vehicles. The front passenger air bag inflator and cushion may be improperly attached inside the air bag module, which could result in the air bag cushion tearing upon deployment.
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 GLB35 AMG, and 2020-2021 GLB250 vehicles. The side spoilers on the tailgate might not have been installed correctly, allowing them to detach.
remedy available
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2020-2021 GLB250 vehicles. The wheel arch covers on the front fenders might not have been installed correctly, allow them to detach.
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 GLB 250 vehicles. The window air bag in the A-pillar area may not be mounted correctly, affecting its performance. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 226, "Ejection Mitigation."
remedy available
Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2020 GLB250 vehicles. The second row seat may not be correctly aligned within the seat track on one side, possibly causing the seat to not lock properly into place.
remedy available
Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2020 GLB250 vehicles. The rear spoiler above the tailgate may not have been welded correctly. This could result in parts of the spoiler detaching from the vehicle.
remedy available
Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2020 GLB 250 vehicles. Water may enter through the wheel well area into the front occupant foot wells, potentially damaging certain electrical components. This may result in the instrument cluster going blank, or an engine stall while driving without the ability to restart the vehicle.
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 gives GLB owners some of the strongest vehicle warranty protections in the country.
THE BASICS: Mercedes-Benz's New Vehicle Limited Warranty covers 4 years or 50,000 miles. Song-Beverly goes further: if MBUSA cannot repair a substantial defect after a reasonable number of attempts, California law requires a replacement or full repurchase — down payment, monthly payments, and incidental costs included.
REASONABLE ATTEMPTS: Courts have found two attempts sufficient for severe safety defects. The GLB's six airbag campaigns mean two completed airbag repairs on the same system may satisfy the threshold. For the 8G-DCT limp mode, three or more dealer visits without a permanent fix is strong grounds. MBUSA's August 2023 M260 extended warranty is itself evidence the defect existed at the date of manufacture.
THE 30-DAY RULE: More than 30 cumulative days out of service in any 12-month period for warranty repairs — all defects combined — may entitle you to a repurchase without meeting the repair-attempt test.
ATTORNEY'S FEES: Song-Beverly requires MBUSA to pay your attorney's fees if you prevail. Experienced lemon-law representation costs you nothing unless you win.
GLB LEVERAGE: Twenty-four recalls, two 15-year extended warranties (M260 exhaust valve and FSCM software), and the documented 8G-DCT limp-mode pattern give GLB owners unusually strong paper records. Every repair order and recall completion printout is admissible evidence.
“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.
Many GLB owners hear 'we couldn't find the problem.' Here is how to fight back:
1. RECORD THE SYMPTOM BEFORE YOUR APPOINTMENT. Video the transmission shudder during a low-speed pull-away, the MBUX black screen, or the EPB warning light. Courts and arbitrators weight video evidence far above verbal descriptions.
2. REQUEST A SAME-DAY RIDE-ALONG. Ask the service advisor to have the technician drive with you immediately upon check-in — before the symptom resolves. The 8G-DCT limp-mode and shudder events often occur only in specific temperature or load windows not reproducible on a cold-start shop drive.
3. CITE NHTSA COMPLAINT NUMBERS. Tell the advisor: 'NHTSA ODI 11742901 and ODI 11656155 document this exact transmission condition on GLB vehicles.' This forces the complaint pattern onto the repair order.
4. DEMAND A MERCEDES TECHNICAL ASSISTANCE CASE. If the technician cannot replicate the fault, ask the dealer to open an MBUSA Technical Assistance case requiring factory escalation. Get the TA case number in writing before you leave.
5. CONFIRM ALL 24 RECALLS ARE CLOSED. Request a VIN-based recall printout; any campaign showing 'OPEN' should be scheduled immediately. Incomplete recalls undercut MBUSA's argument that the vehicle has been fully repaired.
6. COLLECT EVERY REPAIR ORDER. Take a copy even when it says 'no fault found.' Under Song-Beverly, a cannot-duplicate visit counts toward the repair-attempt record for the same described symptom.
7. VERIFY MBUX SOFTWARE. Ask the dealer to confirm your head unit is at E820.0 or higher (TSB LI82.85-P-069381) and to record the software version on the repair order.
The GLB X247 is a genuinely useful vehicle let down by an unusually turbulent production launch. Twenty-four NHTSA recalls in five model years is a systemic pattern, not a minor quality hiccup. MBUSA's 2023-2024 decisions to extend the M260 exhaust valve warranty and the FSCM software warranty — each to 15 years/150,000 miles — are implicit admissions that significant powertrain defects were baked into the original design. The 8G-DCT limp-mode pattern, acknowledged by at least one dealer as 'software in preparation,' is precisely what Song-Beverly was built to remedy. GLB owners offered a buyback directly by MBUSA should consult a Song-Beverly attorney before accepting — direct manufacturer offers frequently undervalue the owner's full statutory entitlement.
— The Margarian Law team
If your Mercedes-Benz GLB has been to the dealer multiple times for the same transmission malfunction, engine misfire, MBUX failure, or brake warning, you may have options under California's lemon law. Margarian Law has handled thousands of lemon-law cases and offers a completely free case review. You pay nothing unless you win — Song-Beverly requires Mercedes-Benz to cover your attorney's fees.
The GLB 250 uses an 8-speed dual-clutch transmission (8G-DCT) shared across the MFA2 platform. NHTSA complaint ODI 11742901 documents a 2021 GLB 250 4MATIC that entered limp mode at 70 mph, with the dealer acknowledging 'software is in preparation for concern' and Mercedes offering only a vehicle buyback. The immediate cause is typically a transmission control module (TCM) software fault that drops the transmission into protective limp mode, reducing power and speed. The repair is a TCM software update via XENTRY Diagnosis. If the limp-mode condition returns after a software update, request that the dealer open a Mercedes Technical Assistance case and inspect the valve body and solenoids. Three or more dealer visits for the same limp-mode symptom without a permanent fix likely qualifies the vehicle for consideration under California's Song-Beverly lemon law. Document every repair order, including visits where the dealer says it 'cannot be reproduced.' []
Yes, if your GLB 250, GLB 250 4MATIC, or AMG GLB 35 is a MY2020, MY2021, or MY2022, MBUSA extended the exhaust valve assembly warranty to 15 years or 150,000 miles (whichever comes first) in August 2023. The underlying defect is premature wear of the exhaust valve guides and seat rings in the M260 engine, which causes combustion misfires (fault codes P030085, P030x85, P1CEF85, or P1CE577). NHTSA complaints document multiple GLB owners experiencing engine head failures at 40,000–55,000 miles, some initially denied warranty coverage. The MBUSA warranty extension (NHTSA MC-10241534) now covers repair or replacement of the exhaust valve and/or cylinder head at no cost. If you already paid out-of-pocket before August 2023, contact your Mercedes-Benz dealer or MBUSA customer service to request reimbursement. If your dealer denied coverage before or after the warranty extension and you made multiple visits for the same misfire issue, that pattern may support a Song-Beverly lemon-law claim. []
The MBUX 1.0 head unit (A26/17) in GLB X247 vehicles equipped with MBUX (code 548/549) is subject to TSB LI82.85-P-069381, which addresses exactly this condition: the display remaining dark, failing to advance past the Mercedes-Benz welcome animation, or showing a frozen screen. The associated fault code is B19C804 ('Software tampering was detected. There is an internal fault.'). The cause is a software release level below version E820.0, and the fix is a software update performed by the dealer via XENTRY Diagnosis. Because the MBUX head unit also controls the rearview camera, navigation, and the eCall emergency system, a freeze simultaneously disables those features. If your GLB has been reflashed once but the freeze returns, ask the dealer to document the current software version and whether it meets or exceeds E820.0. A recurring MBUX freeze after multiple software updates — particularly if the rearview camera or eCall are affected — qualifies as an infotainment system defect impairing vehicle value and may support a Song-Beverly lemon-law claim. []
The Mercedes-Benz GLB X247 (MY2020-2026) has accumulated 24 NHTSA safety recall campaigns as of mid-2026 — one of the highest recall densities for a compact luxury SUV of its generation. The recalls span the full vehicle system spectrum: six airbag campaigns (including frontal, curtain, and control module software defects); two rearview camera non-compliance recalls; two structural water-intrusion recalls on MY2020 vehicles alone; a fuel rail/injector leak with fire risk (21V961000); front axle carrier corrosion (21V990000); and the ESP/ABS module moisture-ingress recall (22V679000). The tire sidewall recall (24V780000) extends into MY2025 production. To check whether your specific GLB has open recalls, visit nhtsa.gov/recalls and enter your 17-digit VIN. All recalls are repaired at no cost at an authorized Mercedes-Benz dealer. If your vehicle has had multiple recalls performed and you are still experiencing problems, that multi-recall repair history may itself support a lemon-law evaluation under California's Song-Beverly Act. []
DTC P146364 ('Sensor Low fuel pressure and fuel temperature has a malfunction during calculation of fuel pressure — implausible signal') is caused by a software parameter error in the Fuel System Control Module (FSCM/N118) — not a hardware failure in the fuel system itself. MBUSA extended the FSCM software warranty to 15 years/150,000 miles in April 2024 (NHTSA MC-10253706, TSB LI47.20-P-071172) for GLB 250, GLB 250 4MATIC, and AMG GLB 35 MY2020-2021. The remedy is a software update to calibration A0009026661 — a procedure that should take less than an hour and must be performed by the dealer using XENTRY Diagnosis. No physical fuel system parts need to be replaced. The persistent MIL is particularly problematic in California because it causes a smog check failure, making the vehicle legally unregisterable until resolved. If you paid out-of-pocket for FSCM diagnostics or repairs before April 2024, contact MBUSA for reimbursement. If the MIL has returned multiple times despite dealer software updates, document each visit and consult a Song-Beverly attorney. []
Whether any specific GLB qualifies as a lemon depends on its individual repair history, but the GLB X247 has a documented pattern of defects that places many vehicles squarely within California Song-Beverly territory. California law requires that a manufacturer either repair a defect within a reasonable number of attempts or buy back the vehicle. Two attempts may be sufficient for severe safety defects (airbag non-deployment, brake system failure, fuel leak). Four or more attempts are generally sufficient for any persistent defect. The GLB's 24 NHTSA recalls, combined with the M260 cylinder head extended warranty, the FSCM software extended warranty, the documented 8G-DCT limp-mode pattern, and NHTSA complaints showing owners turned away by dealers — collectively indicate that many GLB owners have already crossed the statutory threshold without realizing it. If your GLB has been in for the same complaint three or more times, or if it has been out of service for more than 30 cumulative days in a 12-month period across all repairs, you likely have a viable Song-Beverly claim. A California lemon-law attorney can review your repair orders for free and tell you within one call whether your situation qualifies. []
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