The new Audi A6 Avant gets some special treatment from Senner Tuning, a package which brings both styling and performance tweaks. At the exterior, the German model receives new 20-inch Varianza T1S wheels fitted with 255/35 R20 Vredestein Ultrac Sessanta tires. Power is provided by a 3.0-liter V6 TDI unit producing 374 horsepower and 776Nm