I sent the mechanic all of the information that you guys gave me yesterday. He says" Well I still think its the belt" so I told him to just go ahead and keep changing parts, but I am not paying for the belt or labor if you change it and my car still jumps. He wont even consider checking the things you guys told me. He is a certified MB mechanic at a dealer in Louisiana(this may be the problem... a little inbreeding I suspect.) Ill keep you posted