Electrical Issues Due to Degraded Engine Wiring Harness on Mercedes-Benz 400SEL

The engine wiring can degrade because the insulating material falls off leaving the bare wire exposed. This can cause many problems depending on which wires are exposed and what they touch.

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Average mileage: 183,400 (143,000–223,800)
1 model year affected: 1993
4 people reported this problem
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problem details
1993 Mercedes-Benz 400SEL 223,800 mi,
drivers side head light wont burn after replacing with new bulb and new fuse