The W223 Mercedes-Benz S-Class is a truly excellent vehicle. This particular example is an S580 model that boasts a 496-horsepower twin-turbocharged V8 and mild-hybrid system combined with 4Matic all-wheel drive. It's also very well-equipped with the Driver Assistance Package Plus, the Warmth and Comfort Package, Night, AMG Line, and 3D Technology packages, E-Active body control, active multicontour front seats, and a Burmester surround sound system.Power comes from a 4.0-liter twin-turbocharged V8, rated at 496 horsepower and 516 lb-ft of torque. The 48-volt mild-hybrid system provides a boost of up to 21 horsepower and 184 lb-ft of torque for short bursts of time. The drivetrain spins the four wheels via a 9-speed automatic transmission.