# Service campaign NCU \- 2026010004

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: 11027757
- Published by NHTSA: 2026\-01\-22
- Manufacturer's number: NCU \- 2026010004
- Manufacturer's date: 2026\-01\-23
- NHTSA component: ENGINE

## NHTSA's summary

Mercedes\-Benz AG, the manufacturer of Mercedes\-Benz vehicles, has determined that on certain subject vehicles, the engine electronics control unit software \(ME\-SFI\) does not correspond to the current series production configuration. The possibility exists that a faulty calculation of the cylinder balance diagnosis counter may occur, but there would be no effects on the driving mode. MBUSA will conduct a service campaign. An authorized Mercedes\-Benz dealer will update the engine electronics control unit software \(ME\-SFI\) in the affected vehicles.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11027757-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11027757-9999.pdf)

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

## Components

Engine

## Vehicles listed

- 2020 MERCEDES\-BENZ AMG GLC43
- 2020 MERCEDES\-BENZ AMG GLC63
- 2020 MERCEDES\-BENZ AMG GLC63 S
- 2020 MERCEDES\-BENZ GLC 300
- 2020 MERCEDES\-BENZ GLC 350 E

JSON: [/v1/bulletins/11027757](/v1/bulletins/11027757)

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