Mercedes-Benz (MBUSA) is recalling 4,917 model year 2021 G550, AMG G63, E350, E450, AMG CLS53, AMG E53, AMG GT43, AMG GT53 & AMG GT63, model year 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.
An unsecured child restraint system can increase the risk of injury during a crash.
What to do
Dealers will inspect, and replace -- as necessary -- the rear seat belt assemblies free of charge.
Owners may contact MBUSA customer service at (800) 367-6372.