{"nhtsa_id":11029055,"type":"emissions","type_name":"Emissions","date_added":"2026-02-27","date":"2026-02-28","document_id":"NCU - 2024100016","mfr_campaign":null,"replaces":null,"component":"ENGINE; ELECTRICAL SYSTEM","mfr_system":null,"summary":"Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz, has determined that on certain MY 2019-2021 G-Class, S-Class and GT (463, 222 & 190 platforms) vehicles, the engine control unit software does not correspond to current production specifications. It is therefore possible that onboard diagnostics and/or exhaust gas emissions requirements may not be fulfilled. MBUSA will conduct a service campaign. An authorized Mercedes-Benz dealer will perform the ECU software update.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11029055-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11029055-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11029055","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"MERCEDES-BENZ","model":"AMG G63","year_from":2019,"year_to":2021,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"AMG GT","year_from":2019,"year_to":2021,"match":"exact","vehicle_ids":["2019_mercedes-benz_amg-gt","2020_mercedes-benz_amg-gt","2021_mercedes-benz_amg-gt"]},{"make":"MERCEDES-BENZ","model":"AMG GT C","year_from":2019,"year_to":2021,"match":"base","vehicle_ids":["2019_mercedes-benz_amg-gt","2020_mercedes-benz_amg-gt","2021_mercedes-benz_amg-gt"]},{"make":"MERCEDES-BENZ","model":"AMG GT R","year_from":2019,"year_to":2020,"match":"base","vehicle_ids":["2019_mercedes-benz_amg-gt","2020_mercedes-benz_amg-gt"]},{"make":"MERCEDES-BENZ","model":"AMG GT S","year_from":2019,"year_to":2020,"match":"base","vehicle_ids":["2019_mercedes-benz_amg-gt","2020_mercedes-benz_amg-gt"]},{"make":"MERCEDES-BENZ","model":"AMG S63","year_from":2019,"year_to":2021,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"AMG S65","year_from":2019,"year_to":2020,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"G 550","year_from":2019,"year_to":2021,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"S 450","year_from":2019,"year_to":2020,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"S 550","year_from":2019,"year_to":2020,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"S 560","year_from":2021,"year_to":2021,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"S 560 E","year_from":2019,"year_to":2020,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-MAYBACH","model":"S 560","year_from":2021,"year_to":2021,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-MAYBACH","model":"S 560 4MATIC","year_from":2019,"year_to":2020,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-MAYBACH","model":"S 650","year_from":2019,"year_to":2020,"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":[]}