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January 17, 2026 Service campaign

Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain subject...

Mercedes-Benz technical service bulletin NCU - 2025120010 for 2023-2026 Mercedes-Benz GLC 300, 2023 Mercedes-Benz S 580 and 2023-2024 Mercedes-Benz AMG Glc43 and others.

Bulletin number
NCU - 2025120010
Component
Electrical system
Summary
Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain subject vehicles, the 48V battery control unit (48 V LIB) software does not meet current production specifications. A miscalculation of the 48V battery’s aging threshold may trigger a fault message in the instrument cluster. MBUSA will conduct a service campaign. An authorized Mercedes-Benz dealer will update software in the 48V battery control unit (48 V LIB).

Owners of these vehicles have filed 91 complaints in the electrical category.

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