1995 Mercedes-Benz 300 Series Electrical system Problems

“1995 Mercedes-Benz e300d wiring harness: temperature reading not accurate, though on the high side so I feel like the car is overheating but really not engine idle sensor inaccurate leading to reading of low RPM at idle and tachometer not always working other consequences: auxiliary fans motors blown due to fans running at high speed always instead of variable and intermittent. I took the car to the shop and was given the bad new about the wiring harness. Cost to replace the wiring harness and other incidentals: $2,250.”

“1995 mercedes benz, e-300d events leading up to the failure: none, normal use of the vehicle the failure, how often it occurs, its consequences: wiring and glow plug harness failure, caused by bad insulation on the wires the insulation on both harnesses was peeling/coming off exposing bare copper wire, causing shorts and hard cold starts. I called mercedes benz direct and they have no knowledge of this problem on these cars. I then find out this is a common occurrence on 1990-1995 300 SERIES vehicles and has cause fires in the past. …”

“1995 mercedes e 300 diesel, the engine wiring harness is falling apart. The insulation is crumbling and all the wires are shorting causing malfunctions of all engine systems, and could cause a fire. Impossible to fix the current harness because every wire is involved, have to replace. I have never seen this before, I have had many classic cars that are much older than this that have perfect wiring to this day. I was told by a non-mercedes shop that this was an attempt by mercedes to make the insulation easily to recycle and that all cars of this period have this problem sooner or later.”

“Entire wiring harness wiring insulation under hood is deteriorated, cracked, turned to powder and is falling off copper wires. Glow plug wiring has cracked and exposed copper causing malfunction to glow plug relay. Ambient temperature wiring failed.”

“Engine of 1995 mercedes benz e320 station wagon misfired and stalled. Investigating the plugs and wiring harness found the harness had disintegrated and shorted out.”