A lot of things
CD changer stopped working
Dash light became very low
Struts need to be replaced
Steering rack replaced
Leak from engine
Eats a lot of oil; 1/3 of bottle for one change of gas
Other things too; don't remember everything
It is really nice to drive this car. It handles well and the interior is very luxurious.
Very solid car in general, but I expected it to be more reliable.
I know that ones built after 1997 are very unreliable, but 94-97 is said to be quite good. Maybe I am just unlucky with this one, but it looks like it is falling apart, no matter how much I fix it. It eats a lot of oil too.
I expected more from German cars.
If it makes you feel any better about your Audi, VW (the maker of Audi) makes overrated crappy German cars too.
I am a little curious what you expect from a ten year old car? Struts usually go out around the 100K mark.
1/3 bottle of oil per oil change is not too bad at all, if you have a few miles on it. I had an Escort and Town Car that would go through at least one bottle per gas fill up.
I wouldn't call it unreliable if it still gets you everywhere you want to go in luxury, with a few minor quirks. It's an old car with typical old car problems. If taken care of, these cars will stay as solid as the day they rolled out of the factory.