Seat belts: rear/other: retractor (Mercedes-Benz)
Vehicle recall 21V-483. NHTSA received Mercedes-Benz USA, LLC’s report on Jun 25, 2021.
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The short answer
NHTSA received Mercedes-Benz USA, LLC’s report on Jun 25, 2021. Copied from NHTSA on Oct 27, 2026.
Every line below is in NHTSA’s own words, with its source beside it.
What’s wrong with it?
An unsecured child restraint system can increase the risk of injury during a crash.
Mercedes-Benz, LLC (MBUSA) is recalling certain 2021 G550, AMG G63, E350, E450, AMG CLS53, AMG E53, AMG GT43, AMG GT53, AMG GT63, 2021-2022 CLS450, and AMG E63 vehicles.
The rear seat belt automatic locking retractors may deactivate early, which can prevent the child restraint system from securing properly.
As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 208, “Occupant Crash Protection.”
NHTSA, Recalls flat file. Released Oct 27, 2026. Updated daily.
- NHTSA’s part: Seat belts: rear/other: retractor.
What should you do?
Dealers will inspect, and replace as necessary, the rear seat belt assemblies, free of charge. Owners notified of the voluntary recall campaign by an interim letter on August 13, 2021. A final letter was mailed on September 24, 2021. Owners may contact MBUSA customer service at 1-800-367-6372.
NHTSA, Recalls flat file. Released Oct 27, 2026. Updated daily.
- How to reach the firm: 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.
- Check a vehicle by its VIN at NHTSA: the recalls still open on it are listed there.
Which ones are recalled?
NHTSA counts 4,917 vehicles potentially involved, across everything this recall names.
Each model year opens its own page: every recall naming it, its owner complaints and its crash ratings.
NHTSA, Recalls flat file. Released Oct 27, 2026. Updated daily.
Who is recalling it?
- Made by Mercedes-Benz USA, LLC.
NHTSA, Recalls flat file. Released Oct 27, 2026. Updated daily.
What the record doesn’t say
- NHTSA’s recall file doesn’t say whether anyone was hurt. Owners’ complaints are counted on each vehicle’s page.
- Whether one vehicle or seat has been fixed: only its maker, or NHTSA’s lookup with a VIN, can say.
- How many have been returned or fixed isn’t in the notice.
Hearth Record wrote these lines.
Sources
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National Highway Traffic Safety Administration, Recalls flat file (FLAT_RCL_POST_2010).
Released Oct 27, 2026 and checked Oct 27, 2026. Updated daily. Public domain (U.S. Government work).
Vehicle, car seat, tire and vehicle equipment recalls, owner complaints and crash ratings are from the National Highway Traffic Safety Administration (NHTSA). Copied on Oct 27, 2026.