NO I had it replaced by Christian Brothers auto, great people! After charging me for plug wires boots & plugs (which were needed) they thought it was the injector #3 that was not firing. before they replaced that they checked further and found the wires were crumbling. they tried to rewire portion that was bad this caused the wire behind where they made the repair to burn up & fail. wire was bad all the way back after trying to splice wire for a full day they gave up and explained nothing to be done but replace harness. merc price 1100.00 for part / they replaced it for 89.00 . I am sure they made no money on this deal and only did it to help me. this harness has wires to all kinds of different things on the engine. I had a lot of wierd things before that seem to have gone away. Car still running fine. (GOOD LUCK WITH PROBLEM CAUSED BY MB )