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SuspensionPart report

2021 Mercedes-Benz GLB 250 Suspension Problems

Complaints
4about this part
Share
14%of 29 total for the year
Median mileage
—not reported
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 4 complaints about the suspension of the 2021 Mercedes-Benz GLB 250, 14% of the 29 complaints for this model year. 1 recall campaign on record is filed under a similar system.

Fewer than 15 complaints name this part, so treat the figures as a rough indication only.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“Escalating Safety Concern – Loud Clunking, Thumping, and Cracking from Front Axle at Low Speeds We are long-time loyal customers and currently own four identical Mercedes-Benz models. Unfortunately, one of our vehicles, a 2021 mb glb250 has recently developed severe clunking, thumping, and loud cracking noises originating from the front axle area, noticeable especially at low speeds. The problem appeared suddenly and is rapidly worsening. After researching the issue, we’ve discovered that many owners of the exact same model and model year report identical symptoms. …”

NHTSA complaint #11701110, filed 2025-11

“Front right ball joint separated from lower control arm with no advance warning and the drive shaft was disconnected from the vehicle body. I was travelling at about 15 mph in a straight line through an intersection on a flat surface with no potholes. Then I saw a warning of a transmission fault in my instrument cluster, followed by a loud grinding sound. My car then came to a stop and I was unable to move the vehicle in Forward or Reverse gear. I ignition cycled the vehicle and tried forward/reverse, then someone told me that my front right wheel had separated. …”

NHTSA complaint #11496487, filed 2022-12

“The component that appears to have malfunctioned is the front axle integral carrier (front subframe) and the related front suspension geometry, as the vehicle now exhibits a persistent pull to the left and degraded steering stability after the dealer replaced the front lower control arms, engine mounts, and performed alignments; this area of the vehicle is fully available for inspection upon request. …”

NHTSA complaint #11719310, filed 2026-02

“This vehicle was purchased new, in cash, from the Mercedes-Benz dealership in Bellevue, WA. It was delivered to me, without being warned about the car being equipped with summer tires, the state of Washington has continuous rain, snow, and ice in a regular basis throughout the years, summer tires are not a good tire for an SUV such as this GLB unit in this region. …”

NHTSA complaint #11445503, filed 2021-12

Related recalls

Related service bulletins

Suspension: other model years

YearComplaintsShare of year
202219%
2021414%
2020611%

Other parts of the 2021 Mercedes-Benz GLB 250

Other or unknown
10 complaints
Engine
7 complaints
Electrical system
4 complaints
Body and structure
3 complaints
Transmission and drivetrain
3 complaints
Back-over prevention (rear camera)
2 complaints
Fuel system
2 complaints
Steering
2 complaints
Visibility (wipers, defrost, mirrors)
2 complaints
Wheels
2 complaints
Air bags
1 complaints
Brakes
1 complaints

← All problems reported for the 2021 Mercedes-Benz GLB 250

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Nov 1, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology