I did almost all the required maintenance myself after the first one or two complementary dealer services. The only inherent issue I had with the car was the ABS module went bad at 120K miles. I had it fixed by Module Masters for a couple hundred as I remember. The one "non-inherent" issue was a mouse ate some of vacuum hoses and I had to replace those once. For being such a complex car (twin turbo, V6, 5 valve head with variable timing, AWD, Tiptronic, etc.) it was pretty damn reliable.Glad you had such good luck. Many I know have not. I'd be curious to see your service records and the costs to do all of the regular scheduled maintenance. Perhaps you are a skilled mechanic or have a good friend that is. Or perhaps the S4 was a much better designed and engineered car than the 98 A6. I got rid of mine as soon as I found out what it was going to cost to have the routine timing belt replacement @ 60,000 miles.
I always wanted to try the 335d,,I hear 400hp is basically a tune away.I miss that car. This was from the day I sold it. You can just see the front of the even more complex car that replaced it, a BMW 335d. That car never visited the dealer in the 50K miles I put on it (a lease).