The E500 sport is a great looking car and when it's working, performs well. However, the frequent costly repairs have been a complete turn off. The car is inferior, price of parts and labor for fixes absolutely ridiculous. Built to last? I say built to break and keep you paying. Mercedes couldn't pay me to buy another one of its cars.
Having this much torque & horsepower makes it almost too easy to drive. Unbelievable acceleration --- from standing start or passing at speed --- just punch it and hold on. Traded a 2003 SL500 to get AMG engine, 5 passenger seating and a really nice trunk. I preferred the SL500 suspension and quicker steering but the E55 engine & transmission make this a preferable choice. This is a stealthy car. Not too many realize what a beast it is. It lives up to the advertising. Not one problem to report at 12,000+ miles. There was one recall for brakes and one fix for suspension --- car pulled to the right. An article in Star magazine pointed out this problem which was fixed under warranty.
By far the best vehicle I've ever owned. I traded in a 1999 E430 for this car, and she was certainly worth it. The acceleration of this velicle is unbelievable. My wife hates to ride with me, especially if we're merging unto the interstate (prime opportunity to to show off). I would only recommend this car to those whom a doctor has certified as healthy.