{"nhtsa_id":11031553,"type":"emissions","type_name":"Emissions","date_added":"2026-04-25","date":"2026-04-24","document_id":"Emissions - 2026020006","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM; ENGINE","mfr_system":null,"summary":"Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain subject vehicles equipped with an 8-cylinder engine, the software of the engine control unit may not correspond to the current specifications. Under specific conditions, the OBD system may not detect an aged catalyst, which could impair the engine’s ability to adjust the catalyst heating, potentially resulting in increased exhaust emissions. MBUSA will conduct an emission service campaign. An authorized Mercedes-Benz dealer will update the engine control unit software on the affected vehicles.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11031553-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11031553-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11031553","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"MERCEDES-BENZ","model":"AMG E53","year_from":2019,"year_to":2019,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"AMG E63","year_from":2019,"year_to":2019,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"AMG E63S","year_from":2019,"year_to":2019,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"AMG GT53","year_from":2019,"year_to":2019,"match":"base","vehicle_ids":["2019_mercedes-benz_amg-gt"]},{"make":"MERCEDES-BENZ","model":"AMG GT63","year_from":2019,"year_to":2019,"match":"base","vehicle_ids":["2019_mercedes-benz_amg-gt"]},{"make":"MERCEDES-BENZ","model":"AMG GT63S","year_from":2019,"year_to":2019,"match":"base","vehicle_ids":["2019_mercedes-benz_amg-gt"]},{"make":"MERCEDES-BENZ","model":"AMG S63","year_from":2019,"year_to":2019,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"AMG S65","year_from":2019,"year_to":2019,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"E 300","year_from":2019,"year_to":2019,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"E 450","year_from":2019,"year_to":2019,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"E 450 4MATIC","year_from":2019,"year_to":2019,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"E 450 4MATIC CABRIOLET","year_from":2019,"year_to":2019,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"E 450 4MATIC COUPE","year_from":2019,"year_to":2019,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"E 450 4MATIC WAGON","year_from":2019,"year_to":2019,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"S 550","year_from":2019,"year_to":2019,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"S 560 4MATIC","year_from":2019,"year_to":2019,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"S 560 4MATIC COUPE","year_from":2019,"year_to":2019,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-MAYBACH","model":"S 560 4MATIC","year_from":2019,"year_to":2019,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-MAYBACH","model":"S 650","year_from":2019,"year_to":2019,"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":[]}