I previously owned a 2005 SL500. The car is indeed more powerful reflecting the increase in horsepower. I actually do not like some of the minor interior changes. For instance, I do not like the change in the hard-top controller handle-switch. The previous switch had a red light incorporated in it to indicate when the up or down function was complete. The current switch no longer has this light indicator, and now you must turn your head around to look. I cannot figure out if the current model has voice control or not, while the '05 model voice control was standard. I do like the bluetooth module allowing use of your personal phone.