I have owned Ferrari, other AMG Mercedes, several SL500's, Corvette's, and I would divorce my wife before giving up this car for any reason. I can't wait to go to work in the morning to drive down the winding grade I live on top of, and going up is just as exhilarating. This is the best car I have ever owned. I also own the S550 and never drive it....why would I?
I love the engine, plain and simple! I love that you can drive this car in traffic without seeming bogged down at low RPM's. The gearing is perfect for a daily driver.
Better stereo. And a CD changer that can be loaded through the dash. Other than that, I cant think of a thing