Audi A6 3.2011 Audi a6 avant quattro for sale. Supercharged Avant 2011 Black fpr sale, only 100,800 Miles. Car is stage 1 API pulley (roughly 400 hp on the wheels). All work/service done at Berg Performance (Denver). Mechanically and cosmetically in great condition. However, car is 7 years old so shows some wear. I along with the second owner and possess had the auto since 30k. Incredible to operate a vehicle and extremely reliable. All scheduled maintenance has become performed. New brakes/rotors done late summer.