Mercedes has secretly revealed photos and specifications for the 2015 C63AMG and C63AMG S.

Mercedes quietly revealed specifications and photos of the C63 AMG and C63 SMG AMGs.

The C63 AMG’s aggressive body kit includes aerodynamic side skirts, sportier bumpers and a rear diffuser. This is flanked with a four-tailpipe sports exhaust system. A power-dome roof, AMG-branded grille, and lightweight 18-inch alloy wheels complete the car.

The cabin continues the sporty style with leather/microfiber sport seats, flat-bottomed steering wheels and stainless steel pedals. The dashboard is wrapped in ARTICO, the aluminum trim and a headliner in black. AMG-branded floormats and illuminated front sill plates are some other notable features.

The twin-turbo, 4.0-liter V8 engine produces 475 PS (350kW) and 650 Nm (479lb-ft). The sedan can accelerate from 0 to 100 km/h in 4.2 seconds before reaching an electronically limited top speed at 250 km/h (155 MPH).

The C63 AMG has an AMG RIDE CONTROL sport suspension with adjustable dampers in three stages. AMG Speed-sensitive Sports Steering System and Internally Ventilated and Perforated Brake Disks measuring 360mm front and 330mm back are also included in the car.

The C63 AMG S is a step up in terms of high gloss black accents, and black flics at the front bumper. Composite brakes are also available on the model, as well as lightweight alloy wheels of 19 inches. High-performance models also have dynamic engine mounts, an electronic locking back differential and revised front or rear axles.

The twin-turbo, 4.0-liter V8 engine produces 510 PS (356 kW) and 700 Nm (516 Lb-ft). The extra power means that the C63AMG S can go from 0 to 100 km/h in just 4.1 seconds, before reaching an electronically limited top speed at 250 km/h (155 MPH).