Faults:

The front bumper pulled off twice (parking at cement barriers and sidewalks).

The air bag light went on intermittently.

The "open trunk" light went on intermittently.

General Comments:

This is a potentially good car. If Audi would, at the very least, warn owners about the front bumper. Otherwise, there is no way to know about the defect until it's too late. Better, if Audi wanted to actually maintain customers, they would spend almost nothing and change the design. Best, they would recall existing cars and modify the front bumper at the cost of a few hundred each, but cheaper than the eventual class action settlement and loss of customers.

Faults:

Bose Symphony stereo system was defective. It was cheerfully replaced by the dealership.

Windshield developed stress cracks, but was quickly replaced (free of charge) by dealership.

Purge valve malfunction caused "check engine" light on dash to glow. A dealership 2000 miles away from home fixed it within 15 minutes of pulling into the lot (without an appointment). The valve failed again, but was replaced by home dealership.

General Comments:

The V-8 offers unbelievable performance and combined with the quattro drive system is an experience unequalled in any vehicle. There are faster cars, but they don't handle like the A-6 and can't hold a candle to its level of luxury, engineering, and design. The sound of the engine is a masterpiece. All this and 24 mpg on the highway while cruising at 75 MPH.

Road noise from the wide tires is about the only drawback I have noticed.

Dealerships (with one exception in North Dakota) are eager and willing to answer questions, solve problems, provide the free regular service, and (this sounds corny) make you feel like one of the family.

Faults:

Water leaks into rear tail light. Dealer replaced it once, but it still occurs.

Brakes squeal incessantly, creating much embarrassment when stopping. Dealer says it's normal and will not fix.

Fuse for interior lights was blowing constantly, crippling the alarm, windows, sunroof (which was stuck open!), etc. Took dealer 3 days to locate a short under the seats.

One of the Xenon headlights will not light at random. Dealer replaced assembly; it still happens.

Cup holder broke after 1 week.

CD player will randomly stop, or go to another song. (I'm assuming it's not commentary on what I'm playing...)

Brakes totally and inexplicably failed while I was approaching a stop light. Problem never resurfaced; no indication why it happened.

Air conditioning is not adequate to cool the car.

How many Audi/VW owners also take exception to Audi's Incredible Hulk door stops, which often send the door flying back into you as you're trying to get out??

General Comments:

Regarding performance, the car is amazing. It's heavy, so it takes turns hard unless you remember to keep the wheels driving -- the quattro then takes over and keeps the car planted.

I have no complains about the engineering or the performance, however a luxury car should have better reliability, and the dealership should be more responsive. Because of my experiences with this car, I'm living for lease-end when I'll choose another manufacturer.