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#1
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Mis-Firing 1992 300SE
My 300se had begun running very rough...since I've just purchased the car my guess was a cap, rotor and set of wires and plugs wouldn't hurt...little did I know that it's $400.00 worth of parts. When it didn't improve the missing didn't get better I was stumped. A close examination of the injection harness proved to be the culprit. The coatings on the wiring harness were disintergrading. I'm in the process replacing the harness...$700+.
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#2
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Wire harness failures are very common on '92-'95 M104 engines like yours. The insulation goes bad and flakes off the wires.
Do a search under "wiring harness" and you'll get hundreds of hits.
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Paul S. 2001 E430, Bourdeaux Red, Oyster interior. 79,200 miles. 1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron". |
#3
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Miss-firing 1992 300se REPLY
Do the replacement harness fail too? Is there someting that can be done to prevent the harness from failing?
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#4
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No, the replacement harnesses are fine.
Mercedes got caught up in the green movement, and experiemented with wire insualtion that would be more easily recycleable. The problem is, it bio-degraded in the car, due to heat. The insulation was fixed at the end of the 1995 model year.
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Paul S. 2001 E430, Bourdeaux Red, Oyster interior. 79,200 miles. 1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron". |
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