Vehicle recall 21V639000 · August 13, 2021
2020 Mercedes-Benz GLB 250
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.
Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.
- Summary
- 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.
- Consequence
- Air bags and seat belts that do not function properly can increase the risk of injury in a crash.
- Remedy
- 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.
- Notes
- Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.
Recall details
- NHTSA campaign
- 21V639000
- Reported to NHTSA
- August 13, 2021
- Filed by
- Mercedes-Benz USA, LLC
- Manufacturer campaign
- 2021080019
- Owner notification
- September 17, 2021
- Vehicles potentially affected
- 66
- Initiated by
- the manufacturer
- Components
- Air bags › Air bag/restraint control module › Software
Vehicles covered
As listed by NHTSA. A recall usually covers only some vehicles of each model and year, often a production date range.
- Mercedes-Benz GLB 250 (2020): 2020
Has your Mercedes-Benz been repaired?
Recalls here come from NHTSA’s records for the model and year. Not every vehicle of a model is included in every recall, and this site can’t see whether a repair has been done. Only a VIN lookup can tell you that.
NHTSA’s VIN search doesn’t show recalls that were already repaired, recalls more than 15 years old, or some small manufacturers’ recalls. Recall repairs are free.