have you had an oppertunity to review the following thread?:

MB Wiring Harness Failure

it has a lot of info about harness replacement (titled "MB Engine Wiring Harness Failure")

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1994 C280
2009 VW Tiguan
1993 Toyota X-tra Cab SE-5


1973 220D ... Gone, but not forgotten
1991 Alfa Romeo 164L Gone, wife MADE me forget it

2006 Hyundai Tucson... just straight out FORGOTTEN!