I have a 1990 Coupe Quattro also with 16's on it. The same thing happens to me. The Right Front tire rubs on te wheel well, where as the same thing doesn't happen to the other side. I don't know if this means that the previous owner screwed up the supsension Like what may have happened to yours, or that this is something that is indicative to this car. Any one else with some insight? Dave.