What Car? Classifieds have 89 approved used Audi A6 Allroad cars available for sale from Audi approved dealers. Browse our classifieds now, the easiest and most powerful used car search around and Antuan Goodwin Reviews Editor / Cars. The 2019 Audi A6 Premium 55 TFSI Quattro (why couldn't they just call it a 3.0T?) starts at $59,895 including a $995 destination charge. Four-cylinder EgGmX.