NHTSA (USA)High Risk
Defect
Mercedes-Benz USA, LLC (MBUSA) is recalling certain model year 2016-2017 S63 AMG Coupe, S65 AMG Coupe, S550 Coupe 4Matic, S63 AMG 4Matic Convertible, and S550 Convertible vehicles manufactured June 29, 2015, to March 15, 2016. The seat belt extenders on the affected vehicles may not retract as intended and may potentially break the event of a crash.
Safety Risk
In the event of a crash, if the seat belt extender does not retract and/or the extender breaks, the seat occupant may not be properly restrained, increasing their risk of injury.
Remedy
MBUSA will notify owners, and dealers will update the control unit software, free of charge. The recall is expected to begin in mid-December 2016. Owners may contact MBUSA customer service at 1-800-367-6372.
672 vehicles affectedMfr ref: 2016110006Updated May 25, 2026