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: 127,989 (42,000–200,000)
6 model years affected: 1994, 1995, 1996, 1997, more1998, 1999
20 people reported this problem
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Viewing 1 - 8 of 8 problem details
1994 Mercedes-Benz S500 89,549 mi,
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
1995 Mercedes-Benz S500 149,325 mi,
insulation on engine wiring degraded. replaced with new updated harness
1997 Mercedes-Benz S500 107,000 mi,
Right parking ,console and dash lights not working
1995 Mercedes-Benz S500 145,000 mi,
Car has started shorting out due to low quality of wire of the engine harness and interior.. I have had a fire in the interior due to faulty wires going to lightswitch
1995 Mercedes-Benz S500 200,000 mi,
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
1995 Mercedes-Benz S500 42,000 mi,
Degraded cables are causing intermitent electrical failures.
1995 Mercedes-Benz S500 93,000 mi,
car won't start.
1995 Mercedes-Benz S500 85,000 mi,
check engine lite always on!