The high performance version of the company’s classic A6, the Audi S6 is a modern classic car. Audi first began producing the S6 in 1994, and it is currently in its fourth generation. With the Quattro four-wheel drive system and other performance features, the Audi S6 is a powerful and fun car to drive and has been manufactured as both a wagon and a sedan over its lifetime. To get your hands on an Audi S6 check out our listings of classified ads here at FossilCars.com. We have more ads than any other online site.