This 2011 Audi S4 Premium Plus, finished in Quartz Gray Metallic with a black interior, features a clean Carfax report and notable factory equipment including a sports differential and Bang & Olufsen sound system. It boasts extensive modifications such as an APR Stage 2+ ECU tune, APR supercharger pulley, Milltek exhaust, and Bilstein B16 suspension, though it exhibits cosmetic wear including paint damage, curb rash, and interior trim issues. The seller purchased the car in 2013 and has added approximately 71,400 miles.