The 2006 Audi S6 has received also a station-wagon version.
It was the model with the biggest gasoline engine ever installed inside an A6 shell, sedan or station-wagon.

On the big, single-frame grille with chromed accents for its rim and vertical bars, the red and silver S6 badge stood discreetly. Five LEDs on each side, installed under the headlights, were telling a story: one LED for each cylinder under the hood. There were some other details such as V12 badges on the fenders and silver rear-view mirror cases, but the last thing that most of the other motorists on the road would see were the four oval exhausts were nicely integrated into the rear bumper. The trunk room was vast, with 546 liters (19,2 cu-ft) of space, that could be extended up to 1660 liters (70,3 cu-ft) of space with the rear seats folded.

Inside, there was a new infotainment unit, named MMI which integrated the navigation, controls for heating and ventilation, and audio unit. It was an all-in-one system accessible via a rotary knob on the center console, with few buttons around it.

The 5,2-liter V10 engine was on the shelf and it already found its way into the A8 model. But the engineers didn’t want to give the same power to the S6 as in the flagship model. So, they detuned it to 440 hp. For the transmission, a 6-speed Tiptronic gearbox was supplied by the ZF and a Torsen center differential with a 40:60 torque distribution was in place to enhance the driving experience.