# 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.

- Type: Service campaign
- NHTSA id: 11032520
- Published by NHTSA: 2026\-05\-08
- Manufacturer's number: NCU \- 2026040007
- Manufacturer's date: 2026\-05\-08
- NHTSA component: ENGINE

## 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)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11032520-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11032520-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine

## Vehicles listed

- 2024 MERCEDES\-BENZ AMG CLA35
- 2024 MERCEDES\-BENZ AMG CLA45
- 2024 MERCEDES\-BENZ CLA 250

JSON: [/v1/bulletins/11032520](/v1/bulletins/11032520)

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