Thanks for the awesome reply korgermeister!

The bad wiring harnesses were installed in ALL Mercedes models coming out in 1992 - 1994 or something, right?

I have a W140 1993 300SE, and I worry that I ave a deteriorating harness. I have read that the '94 C-Class takes about 24 hours by Mercedes to replace (big BIG $$$$$) but I read here that people are replacing their harnesses by themselves!

I sure hope this is possible for a DIY person.

By the way, is your new harness made out of non-deteriorating material?

Regards,
Bryan