Hi, need help i think, just bought my Coupe Quattro 1991 Brilliant drive but im getting a loud knock/bang when i go over a bumb, i took it to a local garage who said its to do with the front suspension as there is some movement in it, but didnt sound to sure. he said it shouldn't be a problem and not to worry about it as it doesn't happen all the time, has anyone experienced this before? should i be worried or not? any response would be greatful 