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

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.

RepairPal Verified
Average mileage: 90,000 (90,000–90,000)
2 model years affected: 1992, 1993
4 people reported this problem
The nation’s largest network of independent repair shops certified for expert training, quality work and fair pricing
problem details
1993 Mercedes-Benz 500SEL 90,000 mi,
engine will not accelerate
The oil pressure sensor was replaced and the wires that goes to it was bare