I drove a E55 Kompressor some years ago however, I found the exhaust note to be way too quiet for the power available. If you get a chance, try out the C63, it's a riot. It's like a big shot of adrenalin every morning for my first month+ of ownership.
I've now gotten a bit used to it, especially after I've just gotten out of driving something slower. It can still scare me but always impresses.
I remember hitting the brakes harder than I should have during the orientation period and feeling as though my brain moved forward in my skull.
Under full acceleration, once the tires stop spinning, it moves like the Starship Enterprise engaging the warp drive. The AMG speedshift gearbox in this car is one of the best autos I have ever sampled. I would choose it over a manual every time. Oh and did I mention the sound coming out of the exhausts??!!!