Like most reviewers here, I bought my A6 right after it came off of a 3-yr lease. I wondered, "Why would the original owner not buy this wonderful car?" The maintenance is horrific on this car but the car drives so well, and the styling is so superb, I am conflicted over whether or not I would make the purchase again. My mistake was in not purchasing an extended warranty, something that I would never have even considered after owning several Japanese cars. I thought that only American cars needed extended warranties. But when you look at similar year BMWs & Mercedes, there was really no contest. The BMW was faster & the Benz had more recognition, but Audi won the styling competition easily.
I owned this car for 2 years now and as I am speaking I don't know where it is now. It has been stolen 4 times now. If you live in a bad neighborhood, this is not the right car for you. Even a baby can steal this car. Other than that everything else is superb with this car. Fun to drive but starts shaking once you hit 80.
I own a 1998 Audi A6 Quattro wagon with 250,000 miles and I trust this car to take me anywhere I traded my much loved 98 Ford Expedition Eddie Bauer for it I get great gas mileage and it's very comfortable I recently drove it from Mich to Va on a tank of gas I would recommend this car to anyone. I have never had to put this car in the shop.
I can't believe the ratings are as high as they are. Way more repair issues than ANY car deserves. Now I have 120k mi and spends more time in shop than home! Expensive to get worked on. Many issues throughout life of car. Would never ever buy another Audi.