This is the most uncomfortable car I have ever driven. As a professional chauffeur who drives fifteen hours a day, five days a week it's important to feel comforable.The noise level is not as good as in previous models.The driver's seat needs a lot of improvment. Mercedes Benz needs to ask "real time " drivers for suggestions.My 1976-450SLC, 1985- 500SEL,1992-600SEL, 1998-S420, 2000- S430, and 2003-500 4matic. All were more comfortable and quiet than the new 2007-550 4matic I have now. Mercedes is not what it use to be.
Being able to adjust the driver's seat, like on the 2003-500 4matic. Now that was a great car.