An executive missile that combines the grace of a Rolls-Royce with the pace of a Ferrari, the S63 is a high-performance version of Mercedes' sophisticated and sumptuous S-Class full-size luxury sedan. In addition to some of the most advanced safety and comfort technologies ever deployed in an automobile, it boasts the mighty punch of a 577-horsepower twin-turbocharged V8
As potent as the S63 is, Mercedes offers an even more outrageous S-Class for truly insatiable (and particularly well-heeled) power junkies: the Mercedes-AMG S65, which packs 621-horsepower V12 engine.
As with every model that leaves the Mercedes-AMG workshop, the centerpiece of the S63 is its engine - a hand-built, twin-turbocharged 5.5-liter V8. Codenamed M157, this mighty motor produces 557 horsepower and an incredible 664 lb-ft of torque. Mercedes claims a zero-to-60 mph time of just 3.9 seconds, while top speed is electronically limited to 186 mph - taken of its leash, the sedan could likely approach 200 mph.
A big part of the S63's accelerative heroics is its 4MATIC all-wheel-drive system, which helps make the most of the blown V8's thrust and also provides improved foul-weather traction. Similar to the 4MATIC used on the latest E63 AMG, the system send 33 percent of the engine's power to the front wheels and 67 percent to the back wheels under normal driving conditions, ensuring the S63 retains its rear-wheel-drive bias
Despite the addition of all-wheel drive - along with the new S-Class' latest luxury and safety tech - the S63 is actually 220 pounds lighter that its predecessor thanks to weight saving measures like a more aluminum intensive body and structure, a lithium-ion battery and a spare wheel recess made of carbon fiber. The lower mass pays dividends in the form of improved handling as well as increased fuel economy, with the latter rated at 15 mpg in the city and 23 mpg on the highway
Handling shifting duties is a seven-speed automatic transmission, dubbed the SPEEDSHIFT MCT, that utilizes a wet clutch pack in place of a traditional torque converter. The result is gear changes that can occur in just .1 second in the transmission's sportiest shift mode, yet the transmission can still provide the gentle shifts expected of a full-size luxury yacht when put in its Comfort setting.
The transmission also benefits from a smooth rev-matching during downshifts and has a launch mode for stoplight racing; if drivers want to take control into their own hands, aluminum paddle shifters situated behind the wheel allow them to do just that.
In order to keep the big four-door in check in the turns, the S63 features an AMG-tuned full-air suspension with adaptive dampers that are designed to provide an ideal balance of agility and ride comfort. Drivers can tailor the suspension - as well as the steering settings - to suit their mood by choosing between "Sport" and "Comfort" modes.
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