While its public reveal will take place in September at the 2013 Frankfurt Auto Show, the wraps have already come off of the all-new and seriously awesome 2014 Mercedes-Benz S63 AMG 4Matic. Boasting more firepower, less weight and greater overall efficiency than its predecessor, the newest AMG offering elevates the automaker's flagship sedan to a whole new level of performance.

The heart of the 2014 S63 AMG 4Matic is the latest and most potent version of the AMG M157 5.5-liter twin-turbo/direct-injected V8, here tuned to make 577 horsepower and 664 lb-ft of peak torque. For the record, that's 41 more ponies than a standard 2013 S63 (and 14 more than one fitted with the optional AMG Performance Package) as well as an extra 74 lb-ft of launch-livening twist units. Backed by an AMG SpeedShift 7-speed automatic transmission with Controlled Efficiency/Sport/Manual modes, this hand-built jewel ships its power to the tires via a performance-biased AMG 4Matic all-wheel-drive system. Collectively that combo can send the S63 AMG streaking from 0 to 60 mph in 3.9 seconds and on to an electronically limited top speed of 186 mph. Although Mercedes has yet to offer any EPA figures on the engine in the new S63, it promises this even-more-formidable V8 will also deliver better fuel economy, abetted by M-B's ECO Start/Stop system. To crank up its aural excitement levels, the engine is fitted with an AMG sports exhaust that uses articulated internal flaps to add more intensity to the sound when the car is in Sport or Manual modes.

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Like its fellow member of the 2014 S-Class line, the new S63 AMG benefits from a comprehensive weight-reduction program that centers on its aluminum/steel hybrid core structure wrapped in predominantly aluminum body panels. To help trim additional mass, this more focused high-performer also features a lighter lithium-ion 12V battery in place of the conventional lead-acid unit, as well as a spare tire well made from carbon fiber. The alternative fitments help reduce curb weight on the 2014 S63 AMG by up to 220 pounds compared to its 2013 counterpart.

Setting an appropriate visual theme for this new ultra-sedan, the 2014 S63 AMG gets a number of subtle exterior enhancements highlighted by a bigger, bolder front splitter, distinctive grille/rear-diffuser treatments, various black/silver shadow accent elements and model-specific AMG badging. In base trim, the fender wells are filled by 19-inch AMG light-alloy wheels wrapped in 225/40 front and 285/35 rear tires, but 20-inch AMG ultra-lightweight rims matched with lower-profile 225/35 and 285/30 rubber are optional. Inside the S63 displays an equally comprehensive array of AMG-design accoutrements, from its bespoke steering wheel and unique instrument cluster to Nappa-leather-clad AMG sport seats with appropriate AMG indicia and carbon fiber trim.

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Underpinning the new S63 is an AMG-developed sports suspension that augments the basic Airmatic package with the ADS Plus Adaptive Damping System that offers Comfort and Sport modes available at the touch of a button. The car's more tautly tuned chassis is complemented by bespoke electromechanical AMG speed-sensitive variable-ratio sports steering gear, while its ESP stability system now features Curve Dynamic Assist that adds a new degree of confidence and agility during at-the-limit high-speed cornering. Stopping power comes in two AMG-enhanced forms - powerful standard conventional discs and optional two-piece carbon-ceramic binders that are even more capable and durable in addition to being 20 percent lighter. On the safety front, the new S63 AMG will expand on the bounty of active and passive systems found on the 2014 Mercedes-Benz S550 by including the Driver Assistance Package and Night View Assist Plus in its roster of standards.

The 2014 Mercedes-Benz S63 AMG is scheduled to arrive in U.S. showrooms this November. Pricing will be announced closer to the actual on-sale date.

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