I just purchased a 2006 Mercedes SL500 from FleetRates.com.  What a smooth, trouble free transaction.  The biggest problem I had was believing what a great deal I could get from buying a car over the Internet!  I can tell you I will never buy a car from anyone again except from FleetRates.com.  The price was the best, the service was the best, and everything was just like they said.  Thanks Fleetrates.com, and thank you Elvis, who was certainly in the building (sales person who helped me is named Elvis, really thats his name !!!!!!!!!)