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Old 04-15-2003, 04:03 PM
nazrat nazrat is offline
Diesel on the brain
Join Date: Nov 2002
Location: Upstate Virginia
Posts: 566
Originally posted by G-Benz
BTW, a leak on the front of the head indicates a timing cover seal leak, not the headgasket...
That is a relief. I think that I will tackle that one some weekend.


And the harness would most likely be disturbed if the valve cover was removed. The harness runs alongside the right bank (intake side) of the M104 engine. The plastic wiring cover hides the main harness.

If there is nothing in the service records that indicate a replacement, you can inspect the harness by removing the plastic cover. The harness usually looks pretty new compared to the rest of the ancillary wiring. There is also a white tag attached to the harness with the part number. I believe the newer harnesses have a different part number?

Most harness problems manifested themselves prior to 90K miles of service. MB had tried an environmentally-friendly design which included the "biodegradable" wiring insulation...unfortunately, underhood temps accelerated the process, rendering most harnesses to premature failure.

More than likely, your 131K MB would not have survived this long with the original harness.
I'll cross my fingers. I may remove that plastic cover and take a peek. We've driven it for about 4-5k miles and no CE light so far.

Great car. The hiss in the radio annoys me, but aside from the outside temp display not working and the oil wetness, the car is flawless.


P.S. my parents have a '95 C280 with only about 80k miles, also has had no problems that couldn't be attributed to a rodent chewing on vacuum hoses.
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