The addition of 50 HP has made a huge difference in this car. I owned an '05 SL500, and the second you touch the gas pedal, you can feel the difference. This car moves, and handles perfectly. There have been slight alterations in the body style -- mostly to the front grill -- and the interior feels roomier. It remains a car for the ages.
Keyless-go, where the keys stay in your pocket is a terrific option. So is the integrated blue-tooth technology, where the car "senses" your cell phone, and you operate it through the stereo and speaker system.