Maybe I was a little too harsh on how the C230 sounds, not much but a little, perhaps a better way to describe it is an uneven firing impulse sound. Something like the way a V-8 sounds when you remove a plug wire. And no there isn't anything wrong with her car, I've compared it to other Kompressor engines and they all sound the same to me. Maybe that is a better description. I have no idea what the non-kompressor engines sound like, never driven one or even been close to one.
BUT, turn the ESP off, apply just a little brake pressure with left foot, slowly feed the gas with the right and watch those babies burn!!