The facelifted 2012 Mercedes-Benz C63 AMG wasn’t supposed to see the  light of day until the Geneva Motor Show this March, but a sizable batch  of photos have leaked out giving us a clear look at what to expect in  Switzerland.
On the outside, the C63 gets a set of SL-inspired headlamps with  ornate light-piping and LED DRLs mounted in the revised fascia. LEDs  make their way to the tail lamps, while redesigned 18-inch wheels fill  the wheel wells and frame upgraded brakes.
AMG opted to retain the 6.2-liter V8 instead of fitting its new  5.5-liter biturbo mill, so output remains at 451 horsepower and 443  pound-feet of torque. The Development Package will reportedly stick  around for 2012, raising output to 481 hp and nixing the 155 mph limiter  to allow the C63 to top out at 174 mph. The sports package also  includes a few interior tweaks, a carbon fiber trunk spoiler and red  calipers that clamp onto 14.2-inch front discs.
However, the biggest change comes in the form of a new transmission.  The C63 now sends power to a seven-speed Speedshift MCT auto ‘box which  swaps out the conventional torque converter for a high-performance  clutch pack said to deliver smoother, more immediate shifts.
After the C63′s big day in Geneva, the revised C-Class will go on  sale this fall, with the AMG-fettled version getting a very slight bump  in price.