# Service campaign NCU \- 2026010006

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: 11027900
- Published by NHTSA: 2026\-01\-31
- Manufacturer's number: NCU \- 2026010006
- Manufacturer's date: 2026\-01\-31
- NHTSA component: ENGINE

## 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 to current production specifications. The control unit may experience a delay in detecting an intake manifold leak while driving in hybrid mode. Subsequently, this may cause a delay in the activation of the Malfunction Indicator Lamp intended to alert the driver of the leakage. 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)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11027900-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11027900-9999.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/11027900](/v1/bulletins/11027900)

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