The Audi TDI range is currently headed by the 4.2-litre, 326PS V8 TDI powering the A8 Saloon. Model OTR Price. Audi A6 3.0 TDI quattro S line 34,460. Audi A6 3.0 TDI quattro Avant S line 35,730 Every Driver's Manual for Choosing Perfect Summer Tires. Exploring All-Season Tires: Types and Their Ideal Applications. Wheel size, PCD, offset, and other specifications such as bolt pattern, thread size (THD), center bore (CB), trim levels for 2005 Audi A6. Wheel and tire fitment data. Original equipment and alternative options. Audi A6 tire sizes. Find tire sizes for each Audi A6 year and option. 2005 Audi A6 Tire Sizes. 3.2 Quattro. 1. 225/55R16. 2. 245/45R17. 3. 3.0 TDI quattro 0VgsXA.