Electrical Issues Due to Degraded Engine Wiring Harness on Mercedes-Benz S320

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: 105,221 (60,000–145,549)
6 model years affected: 1994, 1995, 1996, 1997, more1998, 1999
15 people reported this problem
Viewing 1 - 7 of 7 comments
Wiring insulation degrades and bare wires exposed leading to shorts in various electrical components
Engine cuts out while driving. Must be restarted.
Caused melted wires and shorting of mirror and fuse box
All replaced
deteriorated wire insulation causing drivebavility issues replaced with new wire harnnes
Mass air sensor meter harness is falling apart.
Running rough. Had to replace wiring harness.
Wiring harness decayed and needed replacement