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What is the reason for the auxiliary battery failure in the Mercedes-Benz GLC260?

1 Answers

StEli

07/30/25 10:36am

It is necessary to understand the meaning of the fault code to determine the specific cause. The auxiliary battery generally refers to the battery that powers the entertainment system, windows, and lighting system during startup. If there is an auxiliary battery failure, the meaning of the fault code must be analyzed for repair. Possible causes include low battery voltage, battery damage, or faults in the wiring and control circuits. It is recommended to visit a repair shop for an initial inspection. Precautions for battery usage: 1. Charge the car battery frequently: If the battery is left unused for a long time, it will gradually self-discharge and eventually become unusable. Therefore, the car should be started periodically to charge the battery. 2. Avoid parking the car in an open parking lot for extended periods: If long-term parking is unavoidable, the battery should be removed and stored to prevent freezing damage. 3. Clean the battery terminals periodically: Apply specialized grease to protect the wiring harness. Regularly inspect the battery accessories and connecting wires.

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