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September 8, 2023 Service bulletin

12V message in IC when starting the vehicle

Mercedes-Benz technical service bulletin Ll54.10-P-076896 for 2022-2024 Mercedes-Benz C300, 2023-2024 Mercedes-Benz GLC 300 and 2022-2023 Mercedes-Benz EQS 450 and others.

Bulletin number
Ll54.10-P-076896
Component
Electrical system
Summary
12V message in IC when starting the vehicle. SW updates need to be performed. Follow the guided test for FC U116000 in N73/3 1 EIS CU. Perform the SW checks and updates. Fully charge both 12V and 48V batteries. After, perform a few drive/park cycles with at least 1 overnight park cycle. If the 12V message is no longer present, release the vehicle.

Owners of these vehicles have filed 116 complaints in the electrical category.

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