HI! Im just registered and just moved to US and Im looking for my first car to be an Audi A4 may be late 90s I've seen 2 already and no one good enough, I want to know if there is something special to check before buying the car, some tricks to probe that everithing is working good, or what always generates troubles. I will apreciate your help, Thanks..

Soon to be an Audi driver