Awesome car. I've owned 1998 and 2002 E320 4Matics and this car blows them away. I have the sport model. The ride is incredibly smooth, Nav is good as is the radio. If price is a consideration ask the dealer for an "RDR" car.
The ride is fantastic.
Put REST feature back in. It was a great cold weather feature as it passed residual engine heat for 30 minutes with the car off. Also, MB removed the pass mirror "down" in reverse function but didn't tell anyone or remove the reference in the manual.