{"nhtsa_id":10248178,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2024-01-03","date":"2023-12-11","document_id":"NCU-2023060006","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM","mfr_system":null,"summary":"Mercedes-Benz AG (\"MBAG\"), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (\"MY\") 2012 S-Class (221 platforms) vehicles, the injector codes might no longer be stored in the engine control unit software after installation of the Approved Emission Modification (AEM). The cached injector code may have been lost due to a communication error during installation of the AEM. Customers may experience the MIL illumination or in rare cases, increased engine noise or rough running. MBUSA will conduct an Emission Service Campaign in which an authorized Mercedes-Benz dealer will recode the correct injector codes to the engine control unit on the affected vehicles","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10248178-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-10248178-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10248178","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"MERCEDES-BENZ","model":"S350","year_from":2012,"year_to":2012,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"S400","year_from":2012,"year_to":2012,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"S550","year_from":2012,"year_to":2012,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"S600","year_from":2012,"year_to":2012,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"S63","year_from":2012,"year_to":2012,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"S65","year_from":2012,"year_to":2012,"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":[]}