Bred to battle rivals like the Audi S6 and BMW M3, the hot, new 2015 Mercedes-AMG C63 Sedan and its higher performance C63 S sibling have been revealed prior to their Paris Auto Show debut. Like the recently unveiled 2016 Mercedes-AMG GT, the new C63 lineup will carry the "Mercedes-AMG" nomenclature set to adorn all future offerings that come out of the famed Affalterbach operation. These latest high-performance C-Class variants also share quite a bit of AMG-crafted go-fast engineering with the two-door GT, from its engine and transmission to a fully adjustable Adaptive sport suspension option and driver selectable Dynamic Select operating programs. All this comes with edgier styling and AMG's signature interior treatment.

The new Mercedes-AMG C63 and C63 S are fitted with an M177 version of the new 4.0-liter Mercedes-AMG V8 Biturbo found in the GT and GT S. A "close relative" of that M178-spec motivator, it also features dual turbochargers positioned between the cylinder banks - a "hot inside V" configuration in corporate speak. The engine develops 469 horsepower and 479 lb-ft of torque from 1,750 to 4,500 rpm in base C63 form while C63 S spec sees those figures rise to 503 ponies and 516 peak torque -- the latter on hand throughout the same broad rev range. 

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From 0-60 in 4 seconds or less

These new Mercedes-AMG road burners have sufficient might to snap off 0-60 mph sprints in less than 4.0 and 3.9 seconds, respectively and take both C63 iterations to an electronically limited top speed of 155 mph. While final EPA figures have yet to be released, the new turbo V8 is nearly 32 percent more efficient than the 451-horse/6.2-liter naturally aspirated V8 used in the 2015 Mercedes-Benz C63 AMG Coupe

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As in the Mercedes-AMG GT/GT S, gear-changing chores in the new C63/C63 S are handled by the latest version of AMG's SpeedShift MCT 7-speed sport transmission. Here too, it can function on its own or be manually operated via steering-wheel-mounted shifter paddles. Also carrying over are the Controlled Efficiency/Sport/Sport+ modes as well as an S-exclusive Race setting that can be dialed up using the AMG Dynamic Select switch. There's also an efficiency-enhancing "Gliding Function" capability that decouples the engine from the transmission when the driver lifts off the accelerator between 37-99 mph.

Corners carved on demand 

Underpinning the new C63/C63 S is an AMG variation on the aluminum intensive suspension used in the new Mercedes-Benz C-Class Sedan. In addition to recalibrated springs/shocks/stability control, the tweaks include quicker electromechanical speed-sensitive sport steering, wider track dimensions and a traction-enhancing limited slip differential - mechanical on the C63 but electronic on the  C63 S. Both versions of the rear-drive-only C63 Sedan will be available with AMG Adaptive Sport suspension that offers three different damper settings. Like the GT S, the C63 S can be upfitted with new carbon-ceramic-composite brakes in place of the standard ABS package. The C63 has staggered-width 18-inch titanium gray painted and polised AMG allow wheels shod with 245/40 front and 265/40 rear rubber. The S models have 19-inch rims with 245/35 front and 265/35 rear tires.   

Continuing well-established AMG tradition, the C63 and C63 S bolster their visual cues with a selection of subtle but functional enhancements to complement a suitably reinforced body structure. The bolder front fascia includes a unique grille, larger air intakes, bespoke splitter and air-channeling "flics" set off by power-dome aluminum hood and wider fenders. At the rear, the cars sport aerodynamic air outlets, a racing-inspired rear diffuser flanked by two pairs of chrome exhaust tips and a subtle decklid "separation edge" that helps bolster high-speed grip. The performance-tuned cabin brings model-specific AMG touches along with the sport seats, 3-spoke Performance steering wheel, stainless steel pedals and dedicated gauge cluster graphics. 

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The 2015 Mercedes-AMG C63 and C63 S Sedans will arrive in the U.S. next March, but pricing, packaging, fuel economy and other details won't be released until closer to the on-sale date. While the equally cool C63/C63 S Wagon will remain Euro-only offerings for now, Mercedes confirmed that we will see a limited run of C63 S Edition 1 models that will be differentiated by unique 19-inch forged alloys, a Night Package with various black/black chrome accents as well as distinctive interior upgrades including black diamond-tufted Nappa leather upholstery and carbon red pepper/light aluminum trim. 

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