WAY:
Can I understand the E class coupe...doesn't it use the C class chassis? So really we have two C class coupe?

 

That is correct, as quote below by E Class Product Manager

Speaking with Wolfgang Bremm, E-Class product manager, Automotive News has confirmed that the 2010 Mercedes-Benz E-Class Coupe is in fact based on the C-Class platform, not on the E-Class after which it is named. This is the very same C-Class platform officially called the W204. Renaming the car that replaced the two-door CLK as an E-Class is interesting to say the least, but it follows Merc's previous production of basing the W209 CLK on the W203 C-Class platform.