Well, I've got a few issues with the a4 atm. But they aren't major ones so it doesn't bother me. Clutch is the next thing.
All in all, it's really nice to drive for a 15 year old car. I like the fact I'm learning loads about the motor as well.
I had a saxo vtr before the a4, so it's quite a change in driving style. Need to learn about how to use vcds though as its basically a computer on wheels.