Wiring Harness Insulation Disingegrating on E320 - Mercedes-Benz Forum

 
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post #1 of 6 (permalink) Old 07-07-2006, 01:19 PM Thread Starter
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Wiring Harness Insulation Disingegrating on E320

I was most disappointed yesterday when my MB dealer informed me that my 1995 E320 required a new wiring harness.

This machine lives inland, is not subject to salt corrosion, and is kept clean and stored in a garage. No obvious reason for it to be falling apart.
This is my fourth MB and the others NEVER had wiring that broke down by itself.

Did they use inferior wiring on this model, or is it just dumb bad luck on my part?

haimur
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post #2 of 6 (permalink) Old 07-07-2006, 02:19 PM
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Originally Posted by haimur@shaw.ca
I was most disappointed yesterday when my MB dealer informed me that my 1995 E320 required a new wiring harness.

This machine lives inland, is not subject to salt corrosion, and is kept clean and stored in a garage. No obvious reason for it to be falling apart.
This is my fourth MB and the others NEVER had wiring that broke down by itself.

Did they use inferior wiring on this model, or is it just dumb bad luck on my part?
Check for rodents. They like the taste of the newer insulation and this is a lot more common a problem than you would think. Bait some traps where you park your car and see what happens.

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post #3 of 6 (permalink) Old 07-07-2006, 04:02 PM
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welcome to the club, never heard of a good harness on a e320 before and guess I won't. This is where MBZ f*cked up...Get it replaced and move on.

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post #4 of 6 (permalink) Old 07-07-2006, 05:25 PM
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Harness was made to be biodegradeable and does it too soon. Volvo had same problem.

Kent Christensen
Albuquerque
'07 GL320CDI
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post #5 of 6 (permalink) Old 07-07-2006, 08:29 PM
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That was and is a common problem not only with the E-class cars of that period but the S-class as well. Heat and viberation are the culprits. The insulation will harden and crack exposing the bare wires. The wires will then start to contact each other and cause missfires,check engine lamps,and various other problems. You have no choice but to replace the harness. When you have it replaced ask to see the old one. Take one of the wires and bend it,you will see the insulation crack not bend.
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post #6 of 6 (permalink) Old 07-08-2006, 10:54 AM
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All 93-95 MB have the wiring harness problem. There was a requirement they be biodegradable. Well they certainly are. Why MB did not cover this under a recall is a mystery.
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