I am currently facing a $3600+ repair bill for my 1994 E 320. Apparently the wiring harness failed and took the control unit with it. I am told by the dealer that the wiring harness is a commonly replaced item. In 50 years of car ownership, including several older British cars and an Italian one, none being noted for robust electrics, I have never had a harness fail. I believe that, especially in view of modern plastic and insulation technology, a wiring harness should last the life of the car and this 'common' failure is indicative of an engineering error. Have others had this problem? This failure seriously affected both the emmisions system and the ASR with associated environmental and saftey implications.