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Mercedes-Benz E 350 Recall 21V483: Rear seat belts may loosen child seat hold in a crash

NHTSA campaign 21V483, reported June 25, 2021, 4,917 vehicles potentially affected.

What this recall means for you

Certain 2021 Mercedes-Benz AMG and CLS models have rear seat belt automatic locking retractors that may deactivate early. When this happens, a child restraint system may not be secured properly, and the vehicles do not meet Federal Motor Vehicle Safety Standard 208 for occupant crash protection.

An unsecured child seat can increase the risk of injury to a child during a crash. If you have a child seat installed in a rear seat of an affected vehicle, check that it is held firmly in place and that the belt locks as it should.

The repair is free. Authorized Mercedes-Benz dealers will inspect the rear seat belt assemblies and replace them as necessary at no cost to you. Owners were first notified by interim letter on August 13, 2021, with a final letter mailed September 24, 2021. You can contact Mercedes-Benz customer service at 1-800-367-6372, and you should check your vehicle identification number (VIN) for 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 21V483Mercedes-Benz USA, LLC
Component
SEAT BELTS:REAR/OTHER:RETRACTOR
Problem
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."
Risk
An unsecured child restraint system can increase the risk of injury during a crash.
Remedy
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.
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 AMG CLS532021
Mercedes-Benz AMG E532021
Mercedes-Benz AMG E6320212022
Mercedes-Benz AMG G632021
Mercedes-Benz AMG GT432021
Mercedes-Benz AMG GT532021
Mercedes-Benz AMG GT632021
Mercedes-Benz CLS 45020212022
Mercedes-Benz E 3502021
Mercedes-Benz E 4502021
Mercedes-Benz G 5502021