The 2008 Audi S6 is a high-performance version of Audi's A6 midsize luxury sedan that comes in one loaded trim level. Standard equipment includes 19-inch wheels with performance tires, a sport-tuned suspension, upgraded brakes, adaptive bi-xenon headlights, a sunroof, a power tilt/telescoping steering wheel, dual-zone automatic climate control, heated front sport seats with driver-side memory, leather upholstery, Bluetooth, Audi's Multi Media Interface (MMI) system and a Bose surround-sound system with satellite radio and a six-CD changer in the glovebox., , Optional equipment includes the Technology Package that contains a navigation system, voice recognition, keyless ignition and rearview camera with parking sensors. The Warm Weather Package includes power rear and manual side window sun shades, and a solar sunroof that uses solar energy to power a ventilation system that cools the interior. Stand-alone extras include adaptive cruise control, heated rear seats, iPod integration and a no-cost option for less aggressively bolstered front seats., , , Powertrains and Performance, , The 2008 Audi S6 is powered by a 5.2-liter V10 that produces 435 hp and 398 pound-feet of torque. It sends that power to all four wheels via a six-speed automatic transmission that includes Tiptronic automanual shift paddles behind the steering wheel. In performance testing, we clocked the S6 going from zero to 60 mph in 5.7 seconds, with a quarter-mile run of 14 seconds. Fuel economy is 14 mpg city and 19 mpg highway.