{"nhtsa_id":11032520,"type":"service_campaign","type_name":"Service campaign","date_added":"2026-05-08","date":"2026-05-08","document_id":"NCU - 2026040007","mfr_campaign":null,"replaces":null,"component":"ENGINE","mfr_system":null,"summary":"Mercedes-Benz AG (MBAG), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (MY) 2024 CLA (118 platform) vehicles, the engine electronics control unit software does not correspond to the current production specifications. There is a possibility that the Air Fuel Imbalance (AFIM) diagnosis for the air/fuel ratio could fail. MBUSA will conduct a service campaign. An authorized Mercedes-Benz dealer will update the software of the engine electronics control unit in the affected vehicles.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11032520-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2026/MC-11032520-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11032520","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"MERCEDES-BENZ","model":"AMG CLA35","year_from":2024,"year_to":2024,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"AMG CLA45","year_from":2024,"year_to":2024,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"CLA 250","year_from":2024,"year_to":2024,"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":[]}