I have got a 2006 A3, 170bhp 2.0 tdi. When it reaches around 50 it starts to shake, not a steering wheel shake more through the hole body. It carry's on till around 65-70 then disappears. If you drive straight through it it's not too bad, but if your'e sat doing say 55-60 mph its very bad. It's there no matter what gear the car is in.k Any help much appreciated. Mooey