The Audi A6 was a series of midsize luxury cars introduced for the 1995 model year. The A6 was the successor to the Audi 100, and was offered as a sedan or 'Avant' station wagon. The most notable variants of the A6 are the S6 and RS6, which are performance versions of the standard car. The A6 has been built in five generations: C4 (1995-1997), C5 (1998-2004), C6 (2005-2011), C7 (2011-2018), and C8 (2019-2021).