Service campaign NCU - 2025040004

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, the manufacturer of Mercedes-Benz vehicles, has determined that on certain subject vehicles, the engine control unit software may not correspond with current production specifications. There is a possibility that the dynamic driving profile may not be accurately calculated, which could possibly lead to an unsuccessful diagnostic routine for the lambda sensors. MBUSA will conduct a service campaign. An authorized Mercedes-Benz dealer will update the engine control unit software.

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

Electrical system, Engine

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

• Bulletins for another vehicle
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• Report an error by email