{"nhtsa_id":11016040,"type":"emissions","type_name":"Emissions","date_added":"2025-03-27","date":"2025-03-27","document_id":"NCU - 2025030008","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM","mfr_system":null,"summary":"Mercedes-Benz AG, the manufacturer of Mercedes-Benz, has determined that on certain MY 2019 A-Class (177 platform) vehicles, the engine control unit software may not correspond to the current specifications, causing the on-board diagnosis to incorrectly detect a fault in the lambda sensor that may result in the illumination of check engine malfunction indicator lamp (‘MIL’). MBUSA will conduct an Emission Service Campaign. An authorized Mercedes-Benz dealer will update the engine control unit software.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11016040-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11016040-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11016040","components":[{"id":"electrical","name":"Electrical system","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"MERCEDES-BENZ","model":"A 220","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":[]}