# Service bulletin NCU \- 2024040003

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 bulletin
- NHTSA id: 10253698
- Published by NHTSA: 2024\-05\-01
- Manufacturer's number: NCU \- 2024040003
- Manufacturer's date: 2024\-04\-19
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

This is to notify you of the Service Campaign Launch to check the regulation valve in 139 Model Year \(MY\) 2023 GLC \(254 platform\) vehicles. The vehicles will be visible and flagged in VMI as OPEN on April 19, 2024. Mercedes\-Benz AG, the manufacturer of Mercedes\-Benz vehicles, has determined that on certain MY 23 GLC \(254 platform\) vehicles, the regulation valve in the low temperature coolant circuit may become stuck. This would lead to a fault message in the instrument cluster. MBUSA will conduct a service campaign. An authorized Mercedes\-Benz dealer will check the coolant valve on the affected vehicles and replace it, if necessary.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-10253698-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-10253698-9999.pdf)

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

## Components

Engine

## Vehicles listed

- 2023 MERCEDES\-BENZ AMG GLC43
- 2023 MERCEDES\-BENZ AMG GLC63 S
- 2023 MERCEDES\-BENZ GLC 300

JSON: [/v1/bulletins/10253698](/v1/bulletins/10253698)

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