2021 Mercedes-Benz AMG CLS53, 2021 Mercedes-Benz AMG E53, 2021–2022 Mercedes-Benz AMG E63 and 8 other models Recall: Rear seat belt automatic locking retractors may deactivate early, which…
NHTSA campaign 21V483000 · Seat Belts · filed Jun 25, 2021 · verified Jul 30, 2026
The defect
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."
The risk
An unsecured child restraint system can increase the risk of injury during a crash.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →The fix — what to 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.
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
Related recalls
More Mercedes-Benz AMG CLS53 recalls
- 2019–2021 Mercedes-Benz AMG CLS53 and 3 other models — Transmission wiring harness connection might not have been…
- 2021 Mercedes-Benz AMG CLS53 and 5 other models — 48-volt ground cable connection located in the engine…
- 2019–2021 Mercedes-Benz AMG CLS53 and 3 other models — 12-Volt battery in the trunk may not be properly secured…
- 2019–2021 Mercedes-Benz AMG CLS53 and 3 other models — Transmission wiring harness may be misrouted, which can…
- 2019–2021 Mercedes-Benz A 220 and 58 other models — Please refer to MBUSA's recall report for specific vehicle…
Other campaigns involving Mercedes-Benz vehicles
- 2026 Mercedes-Benz AMG GLE53 4MATIC+ and 13 other models — Bolts for the rear seat belts may not be tightened properly
- 2026 Mercedes-Benz CLA 250+ (ev) and 1 other model — Front passenger seat belt retractor may have been…
- 2025–2026 Mercedes-Benz AMG C43 4MATIC and 34 other models — Infotainment control unit may reset while the vehicle is in…
All Mercedes-Benz AMG CLS53 recalls → · All Mercedes-Benz recalls →
Source: NHTSA recall database, campaign 21V483000 (manufacturer number 2021080021). Data last verified Jul 30, 2026.