Classic receipt of cool sedan building consists of 3 simple components: actually sedan, wheels and fitment. If sedan is black - you can tint windows. Else you can get blacked trim, but with chrome it would look awesome as well. For fitment you need some lowering. Springs, coilovers or solution for rich - airlift. And, maybe the main - wheels. Wheels may be really cool. Here were used rims from Vossen. And this stanced Mercedes E55 AMG looks really cool because wheels are not black as well.

I even don't know what I would want to change in this Mercedes, if it was my car. So cool it is.