2021 Mercedes-Benz GLB 250 4MATIC Problems, Complaints & Recalls
- Compared with other GLB 250 4MATIC years
- Not enough data 2nd of 7 for complaints
- Safety recalls
- 1 recall: check your VIN
- NHTSA crash rating
- Not rated
Owners have filed 2 complaints with NHTSA about the 2021 Mercedes-Benz GLB 250 4MATIC. That ranks 2nd out of 7 GLB 250 4MATIC model years for complaints. The most reported problem area is engine (2 complaints, 100%). There is 1 safety recall covering this model year.
- 2owner complaints
- 1safety recalls
- 0NHTSA investigations
- 0complaints mentioning a crash
Complaints are unverified owner reports and are not adjusted for sales volume.
Most common 2021 Mercedes-Benz GLB 250 4MATIC problems
Complaints grouped by the part of the car owners reported, with the median mileage when the problem happened.
| Problem area | Complaints | Share | Median miles | Owners mention most | Typical repair cost |
|---|---|---|---|---|---|
| Engine | 2 | 100% | — | — | — |
| Electrical System | 1 | 50% | — | — | — |
| Fuel/propulsion System | 1 | 50% | — | — | — |
One complaint can list several problem areas, so shares can add up to more than 100%.
2021 Mercedes-Benz GLB 250 4MATIC recalls (1)
Tap a recall to see the problem, the risk and the fix.
Latches/locks/linkages:doors:lock
Problem: 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.
Risk: A vehicle rollaway increases the risk of a crash or injury.
Fix: Dealers will replace the driver's door lock, free of charge. Owner notification letters are expected to be mailed September 18, 2026. This will be a phased campaign, with the remedy becoming available in different phases based on model and model years. 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.
To see whether a specific car still has an open recall, enter its VIN on NHTSA's official recall lookup. You can also decode a VIN here.
Recent owner reports
Short excerpts of the latest complaints filed with NHTSA, with personal details removed. Full reports can be searched on NHTSA.gov.
As I was driving down road car began to lose power, check engine light came on and car went into limp mode. Car was towed to nearest repair shop where analysis was made. I was advised to take to dealership for repair. Advised that there was a service campaign issued by the manufacturer on GLB class…
While driving on the highway at 70mph my transmission malfunction warning light illuminated in red and my vehicle went into limp mode, creating a life threatening safety defect at highway speeds. I immediately took the vehicle to Mercedes Benz of Pittsburgh. The dealer's own diagnostic tech notes…
Other Mercedes-Benz GLB 250 4MATIC years
← 2020 GLB 250 4MATIC · 2022 GLB 250 4MATIC →
| Year | Complaints | Recalls |
|---|---|---|
| 2026 GLB 250 4MATIC | 0 | 1 |
| 2025 GLB 250 4MATIC | 0 | 1 |
| 2024 GLB 250 4MATIC | 1 | 1 |
| 2023 GLB 250 4MATIC | 1 | 1 |
| 2022 GLB 250 4MATIC | 1 | 1 |
| 2021 | 2 | 1 |
| 2020 GLB 250 4MATIC | 7 | 1 |
See all Mercedes-Benz GLB 250 4MATIC problems by year, every Mercedes-Benz model, or the Mercedes-Benz VIN decoder.
Similar Mercedes-Benz models
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Frequently asked questions
What are the most common problems with the 2021 Mercedes-Benz GLB 250 4MATIC?
Owners most often report engine, electrical system, fuel/propulsion system problems. The top one, engine, accounts for 2 complaints.
Was there a recall on the 2021 Mercedes-Benz GLB 250 4MATIC?
Yes, 1 safety recall. Enter your VIN at NHTSA.gov to check whether the repairs were done on your car.
Was the 2021 Mercedes-Benz GLB 250 4MATIC a good year?
Complaint data can't fully answer that, because counts aren't adjusted for sales. Compared with other GLB 250 4MATIC model years, the 2021 has too little data to compare. Always get a pre-purchase inspection and check the VIN for open recalls.