I have a 1994 E320 and I need a new wiring harness. There is a short affecting the number 6 cylinder and causing an intermittant miss. The part number that I need is 124 440 5632. The cost is about $900.

The dealer tells me the the part of the harness that usually goes is the fuel rail and coils, mostly the coils. I figure that the wire that is most likely shorting out is either the one to the number 6 fuel injector or the one to the coil that serves cylinders 1 and 6. Is there a definitive way to find out besides replacing the whole harness. I would like to try to fix the harness for now, until perhaps I can find one on Ebay or from a wreck. I just don't want to start opening it up willy nilly. I would rather like to find a way to pinpoint the break. Is there a tool that I could use to run over the outside of the wire that would find the break?

Thanks,

Charles Schwartz
1994 E320 Wagon, 118k, new headgasket and timing chain