The Audi A6 is an executive car made by the German automaker Audi AG, now in its fourth generation. As the successor to the Audi 100, the A6 is manufactured in Neckarsulm, Germany – and is available in sedan and wagon configurations, the latter marketed by Audi as the Avant. Audi's internal numbering treats the A6 as a continuation of the Audi 100 lineage, with the initial A6 designated as a member of the C4-series, followed by the C5, C6, and the C7. The C7 version of the A6 is built on the Volkswagen Group MLB platform shared with many other Audi models and potentially one Porsche model within the Volkswagen Group. The related Audi A7 is essentially a coupé-hatchback version of the C7-series A6, but is marketed under its own separate identity and model designation.
All generations of the A6 have offered either front-wheel drive or Torsen-based four-wheel drive – marketed by Audi as their platform with the company's Allroad models.