Hope someone can help me! Just got and A3 1.9TDI 5dr, when i go over 50mph the car starts to shake! There is no vibration in the steering wheel, it almost feels like a badly buckled wheel but i have just put on brand new alloys, had rear wheels checked and balanced but it hasn't made any difference. The car has just went through an MOT so all bushes are ok. Does anyone have an idea on what the problem could be?
