This is to notify you of the Service Campaign Launch to check the regulation valve in 139 Model Year (MY)...

Bulletin number

NCU - 2024040003

Component

Engine and engine cooling

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.

Owners of these vehicles have filed 15 complaints in the engine category.