Car Problem Reports

Mercedes-Benz 400SE Insulation Degrades on Engine Wiring Harness and Leaves Conductors Exposed

Mercedes-Benz 400SE Problem
3 Reports
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Model Year Affected: 1992

Average Mileage: 222,500 mi (190,000 mi - 255,000 mi)


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.

  • , , 255,000 mi

    My vehicle jut started to rum rough after I started it, so I inspected the engine wiring harness and the insulation are many of the wires were degraded to the point, that the insulation was just walling off each individual wires! I did find a guy who does rewire the complete wiring harness, but it is very costly $650.00 total. If I buy a new original wiring harness, this new harness will in time degrade like the one in my vehicle right now, as it is made with the same inferior wires which do not hold up in time!

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  • , , 190,000 mi

    same problem
    not yet fixed

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