{"nhtsa_id":11032704,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-05-15","date":"2026-05-15","document_id":"LI91.29-P-080554","mfr_campaign":null,"replaces":null,"component":"SEATS","mfr_system":null,"summary":"Complaint One or more seat functions are restricted or inoperative. This may include: • Seat memory • Automatic seat adjustment • Easy Entry/Exit • Head restraint presetting • Collision avoidance with bench seat at rear • Actuation by other vehicle systems Seat normalization is missing, and fault code B228678 – “The control unit calibration has been lost or was not performed. Adaptation or adjustment is not correct.” is stored in the seat control unit. Additional fault codes may also be present. Cause The condition is currently under investigation. Remedy Process any additional faults first. • If a clear cause is found (for example, a failed component, wiring issue, or connector concern), repair that issue as required. If no root cause can be determined: • Do NOT perform Initial Start-up, Software Update, or Normalization of the Control Unit • Create a control unit log for the affected seat control unit. • Open a TIPS case to the Body/Chassis/Entertainment inboxand attach the control unit log for further analysis.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11032704-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11032704-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11032704","components":[{"id":"seats","name":"Seats","parent":null}],"codes":["B2286"],"topics":[],"vehicles":[{"make":"MERCEDES-BENZ","model":"AMG C43","year_from":2023,"year_to":2024,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"AMG C43 4MATIC","year_from":2023,"year_to":2026,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"AMG C63 S E","year_from":2024,"year_to":2024,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"AMG C63 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The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}