According to http://www.automobilemag.com
The addition of a two-door coupe to the C-class lineup has given AMG the opportunity to expand the family of its popular C63 AMG model. Currently offered as a sedan and (in Europe) a wagon, the C63 adds a coupe variant for the 2012 model year. Mechanically, the coupe and sedan are identical, with one significant upgrade coming to both for 2012. The two-door is the same size as its four-door sibling, but its lower body, more intimate cabin, and sportier styling make it a racier distillation of the C63 formula.
Familiar motivator
The C63 coupe’s 6.2-liter V-8 is an engine that we know (and love) from the C63 sedan-and elsewhere in the AMG line-up. What do we love about it? The deep rumble on start-up, its quick bark during full-throttle upshifts, the roar as it passes by at full gallop, and of course the tremendous response, which is both linear and lag-free. But the big V-8 actually is on its way out; it has already been replaced by a smaller, 5.5-liter bi-turbo V-8 in the CL63 and the S63, the blown 5.5 powers the new CLS63 AMG, and for 2012 it steps in for the 6.2-liter in the E63 as well. Why not use it here? The answer, from AMG’s head of product development Tobias Moers, is that the 5.5-liter biturbo makes more torque than the smaller C-class chassis can handle (516 pound-feet in the E63). ……………………..
To know more, visit http://www.automobilemag.com
Posted by G-Performance
The 2012 Mercedes-Benz CLS63 AMG is powered by a twin-turbo V-8 that puts out up to 550 horsepower.
Jerry Garrett for The New York TimesThe 2012 Mercedes-Benz CLS63 AMG at the Los Angeles Auto Show.

