Compared to the regular new C - Class two - door, the showroom - ready C 63 S Coupe you see here adds exactly what you'd expect: a more aggressive aero kit including an aggressive front bumper with black honeycomb upper and lower grilles, and prominent rear diffuser flanked by quad exhaust outlets, chunky side skirts and what appears to be a subtle carbon - fibre bootlid spoiler. (motoring.com.au)
The rear has four tailpipes (instead of two) and a more prominent rear diffuser. (cars.com)
There is also a more prominent rear diffuser, while the round exhausts of the existing model make way for rectangular outlets. (motoring.com.au)