Service campaign NCU - 2026040007

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.

NHTSA's 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.

The document

• NHTSA's copy of the document (PDF)
• If that address does not open, try this one

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine

Listing a model year does not mean every vehicle of it is concerned: the document says which.

• Bulletins for another vehicle
• Report an error on this page
• Report an error by email