This page covers 11 recalls and 28 owner complaints for the 2021 Mercedes-Benz Glb 250.
Complaints for the 2021 Mercedes-Benz GLB 250 are spread across a handful of systems, with no single category generating a large cluster of reports given the modest total volume. The engine draws a few complaints, including one describing a catastrophic internal failure, connecting rod and crankshaft bearing damage along with a cylinder misfire, that left the vehicle undriveable on the highway. The electrical system also draws a small group of reports, with owners describing the transmission throwing a malfunction warning and dropping into neutral during wet conditions, a pattern one owner says has repeated multiple times. A couple of suspension and wheel-related reports describe steering pull and degraded handling that persisted even after control arm replacements and alignments. Separately, a notable complaint describes the panoramic sunroof shattering suddenly while driving at highway speed.
28
Total Complaints
By System
The 2021 Mercedes-Benz GLB 250 has 10 recalls, the most serious involving a damaged electronic stability control unit that can disable anti-lock brakes and stability control, and can cause an electrical short that raises the risk of fire.
Two airbag recalls affect occupant protection: an incorrect driver's front airbag module may fail to restrain the driver in a crash and could detach from the steering wheel during deployment, and the driver-side window airbag may not be mounted correctly to the A-pillar, leaving it unable to function properly in a crash. Three recalls cover rear visibility: the rearview camera can fail to show an image or display a black screen due to software faults in the MBUX multimedia system. Two separate recalls address the emergency call system, which can either fail entirely or dispatch responders to the wrong location after a crash. On the exterior, front wheel arch covers and tailgate side spoilers may not be properly secured and can detach at speed, becoming road hazards. A rear suspension level sensor linkage may also be improperly installed, causing the headlights to aim too high and create glare for oncoming drivers.
The official notice
Defect
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. Please refer to MBUSA's recall report for specific model information. 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.
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Complaints are owner-reported and reflect individual experiences, not confirmed defects. They are distinct from recalls. Data sourced from the national vehicle safety complaint database. See trending complaints →
Safety Risk
A vehicle rollaway increases the risk of a crash or injury.
Remedy
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.
At a glance
What can fail
The Electronic Stability Program unit may become damaged, which can disable your anti-lock brakes and electronic stability control, and may cause an electrical short circuit.
What the fix does
Dealers will replace the Electronic Stability Program unit at no cost to you.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
A software error in the communication module's SIM card can prevent mobile network connection, which disables the emergency call (eCall) system.
What the fix does
The communication module software will be updated at no cost through an over-the-air update or by a dealer.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The rear axle level sensor linkage may not be properly installed, which could prevent the headlights from leveling correctly.
What the fix does
Dealers will inspect the level sensor linkage and repair it if needed at no charge.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
A software error prevents the rearview camera from displaying the backup image on the screen.
What the fix does
Dealers will update the rearview camera software at no cost to restore the backup image display.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The front driver's air bag module may be incorrect, potentially affecting its ability to deploy properly in a crash.
What the fix does
The dealer will inspect the front driver's air bag module and replace it if needed at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The driver-side window air bag may not be properly secured to the A-pillar, potentially failing to deploy correctly in a crash.
What the fix does
Dealers will inspect and repair the driver-side window air bag mounting at no cost to you.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The MBUX multimedia system software may cause the display to go black or restart after startup, preventing the rearview camera image from displaying properly.
What the fix does
A dealer will update the multimedia system software, or you can receive the update over-the-air, at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The side spoilers attached to the tailgate may not be properly installed, which could cause them to come loose and detach from the vehicle.
What the fix does
Dealers will inspect the side spoilers and replace them if needed, at no cost to you.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The wheel arch covers on the front fenders may not be properly installed and could detach from the vehicle.
What the fix does
Dealers will inspect the front wheel arch cover installation and correct it as needed at no cost to you.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The communication module software may fail to send your vehicle's correct location to emergency services when the eCall system activates during a crash.
What the fix does
A dealer will update the communication module software, or the update will be sent over-the-air, at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
