I'm looking at a 88 80QT with 90K on it, is there certain parts or areas that wear out or need replacing on it. Does the 4WD runing gear have any down falls or is it bullet proof like most other German quality Autos. I have never owned a Audi before but I love my VW Golf GTI and 914 Porsche. Are audi easy to work on like VW or is everything cramped in. Thanks Paul!