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Originally Posted by thegirlilove
Does anyone know the symptoms of a failing wiring harness for a mercedes vehicle?
Thanks
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Just to supplement other comments, the best sign of a failing wiring harness is "never been replaced, original equipment". In the early 1990's DaimlerBenz chose a supplier who used degradable harness components. To put it plainly, the wiring harnesses were designed to fail after an unspecified number of years in the hot engine compartment. The M119-laden cars are more prone to complete harness failure (for obvious thermal reasons).
It is a good idea to do this before you experience symptoms. One forum member had the harness in his 95 C280 short out the throttle actuator and control modules a couple years ago. Repair bill was in excess of $4k USD. Should be substantially less as a preventative maintenance item, especially if you do it yourself.
-DM