The most powerful version yet of Mercedes-AMG's 4.0-liter, twin-turbocharged V8 sits under the E63S' hood, with 603 horsepower and 627 pound-feet of torque. Paired with a 4Matic all-wheel-drive system that promises totally variable front-to-rear torque. Mercedes' new super sedan is faster off the line than the 640-hp Cadillac CTS-V. The E63S is 0.4 seconds faster to 60, doing the deed in just 3.3 seconds. And if you buy the standard car? Don't worry, the base E63 run to 60 takes just 3.4 seconds, although it hits its electronic limit at only 155. Regardless of model, Mercedes stuck with its nine-speed AMG Speedshift multi-clutch transmission. Mercedes will debut both the E63 and E63S at next month's Los Angeles Auto Show, with US sales to begin next summer. Expect pricing closer to the on-sale date.