Electrical Issues Due to Degraded Engine Wiring Harness on Mercedes-Benz S500

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: 133,887 (42,000–200,000)
6 model years affected: 1994, 1995, 1996, 1997, more1998, 1999
18 people reported this problem
7 people shared problem details
my s500 sdn,starts good,when warms up idle starts to come down and it shots down,will not start,it will backfire when i try to start.after 30 to40 min,it get chance to cool down,car starts up and it is okay. till next cold start
I've had to rewire the entire wiring harness from the headlights to the taillight due to the pathetic wiring harness Mercedes put in these cars. I thought Mercedes was a top of the line car but I'm starting to feel safer in a Ford esco r
the heater never goes off even when the car is off and kills the battery the rear break lights don't work and the windshield wiper works when it wants
Degraded cables are causing intermitent electrical failures.
car won't start.
insulation on engine wiring degraded. replaced with new updated harness
check engine lite always on!
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