Mercedes-Benz S500 lights flashing after dead battery and jump start, issue persists despite new battery on Mercedes-Benz S500

Submitted by Vehicle Owner · Jun 23, 2025
Published by RepairPal

Problem overview

Some Mercedes-Benz S500 owners report experiencing flashing lights even after installing a new battery and performing a jump start, which can indicate several underlying issues. These owners have noted that a faulty alternator may cause the battery light to illuminate, while damaged wires in the electrical system can also lead to flashing lights. Additionally, corrosion on electrical connectors or battery terminals has been reported as a potential cause of this problem. Some owners have identified a bad ground connection as another factor contributing to electrical issues, including the flashing lights. Furthermore, issues with a slipping serpentine belt can trigger the battery light as well. To effectively address these concerns, it is advised that owners have their electrical systems thoroughly inspected by a qualified mechanic to diagnose and resolve the specific causes of the flashing lights.

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