I drive more than I used to in my 1999 E series, or my 1987 RX7 (a great handling car). I seek out the windy roads.
Speed. Handling. Multiple shifting options. Seats. Styling.
Phone offered by MB is sunstandard and expensive ($2500); even the dealer doesn't like it. Aftermarkets phones are better but not capable of being fully integrated. Car is not satellite radio compatable, even though buttons on dash indicate it is, and the dealer thought it was.