The idea of the concept is a more redical interpritation of the "4-door-coupe" theme that Mercedes presented two years ago with its new sleek CLS-Class. So what you see here id the sporty interpritation - CLS being the elegant one.
Why AMG?
For those who don't know, AMG is the high performance division of Mercedes (www.mercedes-AMG.com). There is an AMG version of (almost) every Mercedes model. The idea here is to create an AMG with a Mercedes star and not a Mercedes with an AMG badge.
You see that I've used the typical AMG bumper design, but also in a new interpritaion that's not available on any AMG model to date