The standard features of the Audi S6 2.9T Premium include 2.9L V-6 444hp twin turbo engine, 8-speed automatic transmission with overdrive, 4-wheel anti-lock brakes (ABS), integrated navigation system, side seat mounted airbags, curtain 1st and 2nd row overhead airbags, rear side-impact airbag, driver and passenger knee airbag, airbag occupancy sensor, automatic air conditioning, 21" aluminum wheels, cruise control, ABS and driveline traction control.