The Audi RS 6 is an ultra-high-performance model tuned by quattro, Audi's subsidiary works-tuning company, and is based on the S6, a sportier model which is in turn based on the Audi A6 luxury sports sedan. While some automotive manufacturers dress their higher performance models to further differentiate them from the standard vehicle, Audi took a more subtle styling approach. There are no flashy aerodynamic parts on the RS6, which made its world debut at the 2002 Geneva Motor Show; the only hint of the overwhelming performance you get is from the 255/40R18 tires. The interior is also nearly identical to that found in the original A6, a black dashboard, Recaro leather sports seats, and an emblem on the steering wheel being the only identifying marks that this is the potent RS6.