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Mercedes-Benz GLB 250 Recall 21V639: Air Bag Software May Fail to Deploy in a Crash

NHTSA campaign 21V639, reported August 13, 2021, 66 vehicles potentially affected.

What this recall means for you

The air bag control unit software in certain 2020 Mercedes-Benz GLB 250 vehicles may not activate the front seat belts and front passenger air bag properly in a crash.

Air bags and seat belts that do not function as designed can increase the risk of injury in a crash. Owners should not ignore this recall, even if the vehicle seems to drive normally.

An authorized Mercedes-Benz dealer will update the air bag control unit software at no charge to you. Owner notification letters were mailed on September 17, 2021. You can also contact Mercedes-Benz USA customer service at 1-800-367-6372, and check your vehicle identification number (VIN) for any open recalls.

Check whether this recall is open on your vehicle

The repair is normally free at an authorized dealer.

Official recall notice

Safety recall 21V639Mercedes-Benz USA, LLC
Component
AIR BAGS: AIR BAG/RESTRAINT CONTROL MODULE:SOFTWARE
Problem
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.
Risk
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.

Affected vehicles

Mercedes-Benz GLB 2502020