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May 27, 2025 Service bulletin

Vehicle will not start after charging, HV warning in IC

Mercedes-Benz technical service bulletin LI54.10-P-079340 for 2022-2025 Mercedes-Benz Eqb 300 4matic, 2023-2025 Mercedes-Benz EQB 250+ and 2022-2025 Mercedes-Benz Eqb 350 4matic.

Bulletin number
LI54.10-P-079340
Component
Electrical system
Summary
Complaint Vehicle will not start after charging, HV warning in IC Cause Due to charging error from the charging EVSE the contactors for the DCCU are jammed closed and must be reset via Xentry. Short test found fault code P154B00 in PTCU warning for stuck contactor. Remedy Check for new DCCU (N116/5) SW. Perform SW update to DCCU (N116/5) via XENTRY. Reset contactors through special procedures through N116/5. If no new SW is available - Open TIPS case. Please provide HV CUL and QT in TIPS case.

Owners of these vehicles have filed 106 complaints in the electrical category.

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