My Service Advisor just told me that the Mercedes Regional Rep has agreed to go 50-50 on the cost of the harness. I think this is fair because the car is ten years old and has 118K. The advisor is also looking into giving me a break on the installation cost since the damage occurred as a result of the head gasket job. Good Job Mercedes! I thought this was a nice gesture.

So now the issue of tracking down the broken wires is moot.