i got a 2000 Audi A4 2.8L Quattro tiptronic and it has 220000KM on it ( iknow timing belt will have to be done soon) but i have another problem ... on takeoff accelerating from 0 to 50km i have a constant vibration and it come from the shaft (almost Middle section of the car) and if i accelerate really hard there will be a clicking noise... other than that transmission and motor is in really good shape and works perfectly! i was wondering if someone here ever had a similar issue and can help me saving money on what could be fix and what could be spare.. its my first Audi.. i know a little about mechanic like oil change brakes .. (almost anything that could be done without jacking the car on a lift...) and i would also like to have feedback on that car and or what can be done or check to prevent further damage