I have worked for Mercedes for over 10 years. Always known it's the safest car in the world and the craftsmenship is A+. Finally I leased one and even more excited then I could have imagined. There is no one noise at 80mph+. The stereo system with over 600watts is awesome. The suspension system with the upgrades to agility control cant be beat. It even almost makes sharper u-turns than my motorcycle. The Nav is hard drive based and is almost immediate when using. The voice control system is awesome and can even be tweaked to understand people with accents, like my wife who is from Romania.
The awesome shift of the 7 speed transmission, 600 plus watts of stereo, ride quality, lack of wind noise, voice control and comfort.