{"nhtsa_id":11029960,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2026-03-11","date":"2026-03-09","document_id":"LI88.50-P-080263","mfr_campaign":null,"replaces":null,"component":"STRUCTURE:BODY; ELECTRICAL SYSTEM","mfr_system":null,"summary":"Complaint The trunk lid does not open or close completely and must be operated manually by the customer. The following fault codes are stored in the Tailgate Control (HKS) control unit: P1CA000 & B188C2A Cause If the trunk lid is repeatedly opened manually or the vehicle has experienced undervoltage, the trunk lid loses its normalization due to faulty software coding. Remedy For vehicles with a production date up to 01/22/26 (232) or 01/27/26 (192): Update the HKS N121/1 control unit and perform SCN coding. • If no new software is available, perform SCN coding. Vehicles with a production date 01/22/2026 (232) or 01/27/2026 (192) and later have already received the correct QNT from the factory.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11029960-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11029960-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11029960","components":[{"id":"structure-body","name":"Body and frame","parent":null},{"id":"electrical","name":"Electrical system","parent":null}],"codes":["B188C","P1CA0"],"topics":[],"vehicles":[{"make":"MERCEDES-BENZ","model":"AMG GT43","year_from":2025,"year_to":2026,"match":"base","vehicle_ids":["2025_mercedes-benz_amg-gt","2026_mercedes-benz_amg-gt"]},{"make":"MERCEDES-BENZ","model":"AMG GT55","year_from":2024,"year_to":2025,"match":"base","vehicle_ids":["2024_mercedes-benz_amg-gt","2025_mercedes-benz_amg-gt"]},{"make":"MERCEDES-BENZ","model":"AMG GT55 4MATIC+","year_from":2024,"year_to":2026,"match":"base","vehicle_ids":["2024_mercedes-benz_amg-gt","2025_mercedes-benz_amg-gt","2026_mercedes-benz_amg-gt"]},{"make":"MERCEDES-BENZ","model":"AMG GT63","year_from":2024,"year_to":2026,"match":"base","vehicle_ids":["2024_mercedes-benz_amg-gt","2025_mercedes-benz_amg-gt","2026_mercedes-benz_amg-gt"]},{"make":"MERCEDES-BENZ","model":"AMG GT63 4MATIC+","year_from":2025,"year_to":2026,"match":"base","vehicle_ids":["2025_mercedes-benz_amg-gt","2026_mercedes-benz_amg-gt"]},{"make":"MERCEDES-BENZ","model":"AMG GT63 PRO 4MATIC+","year_from":2025,"year_to":2026,"match":"base","vehicle_ids":["2025_mercedes-benz_amg-gt","2026_mercedes-benz_amg-gt"]},{"make":"MERCEDES-BENZ","model":"AMG GT63 S E","year_from":2025,"year_to":2025,"match":"base","vehicle_ids":["2025_mercedes-benz_amg-gt"]},{"make":"MERCEDES-BENZ","model":"AMG GT63 S E PERFORMANCE 4MATIC+","year_from":2025,"year_to":2026,"match":"base","vehicle_ids":["2025_mercedes-benz_amg-gt","2026_mercedes-benz_amg-gt"]},{"make":"MERCEDES-BENZ","model":"AMG SL43","year_from":2023,"year_to":2026,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"AMG SL55","year_from":2022,"year_to":2025,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"AMG SL55 4MATIC+","year_from":2023,"year_to":2026,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"AMG SL63","year_from":2022,"year_to":2023,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"AMG SL63","year_from":2025,"year_to":2025,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"AMG SL63 4MATIC+","year_from":2023,"year_to":2026,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"AMG SL63 S E","year_from":2024,"year_to":2025,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"AMG SL63 S E PERFORMANCE 4MATIC+","year_from":2024,"year_to":2026,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-MAYBACH","model":"SL 680 4MATIC+","year_from":2026,"year_to":2026,"match":null,"vehicle_ids":[]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. 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":[]}