Electrical Issues Due to Degraded Engine Wiring Harness on Mercedes-Benz 500SEL

Problem Description and Possible Solution

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.

Problem Data
RepairPal Verified
Average mileage: 90,000 (90,000–90,000)
2 model years affected: 1992, 1993
4 people reported this problem
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engine will not accelerate
The oil pressure sensor was replaced and the wires that goes to it was bare