The engine blew up due to the oil line clogging.
The alloy wheels cracked, leaving me stranded.
The heater stopped working.
The air conditioner stopped working.
The tie rods wore out well before they should have.
Speakers cracked.
Air filter is very difficult to change.
It looked good and seemed to be about the right size for me, but I was immediately disappointed with the turbo lag, which can be severe and left my car in the dust whenever I wanted to pass someone else. The turbo doesn't kick in until 3k rpm, and even then it needs time to spool up.
The build quality was poor.
I immediately took off the rear seat head rests because they obstructed my view.
Then my engine blew up because Audi puts a screen in its fuel line to catch the ground up metal that flows through, and the screen clogs. Thank for letting me know about it Audi!
The Audi service people are trained by the devil himself, and were worse than useless.
I will never buy another Audi, and wouldn't have kept this one if I hadn't gotten married and put all my money into a house.
140,000 miles and they are your only problems? A bit of research over the years would have credited you with the knowledge that the oil lines could clog. Based on the short list of faults, I would suggest Audi lived upto its name in this case. Your list would have been much longer if you bought a car from certain other manufacturers.