I bought the SLK350 just over a year ago. It's lived up to almost every expectation. Driving it is like handling a rocket. It has serious power and when you punch it, there is literally no hesitation. Even with the top down, there is no wind noise - you can listen to the radio and your hair doesn't look like you fixed it with a weed-eater. I do have the AirScarf and it makes a huge difference. Like everyone else I think the cupholder is an abomination. I knocked a full cup of coffee over in it (it's in a bad place AND it's flimsy). Now the buttons on my radio and heat/air are spongy and unpredictable. Mercedes can't fix them either. Still, a great car.
The top going up or down is a 3-ring circus! Gathers a crowd every time! Love the handling and pick-up. The headlights are amazing without blinding oncoming drivers.
MOVE the cupholder! Tires wear out quickly. Seat needs better adjustment. I'm only 5'2" so the seat belt needs to be adjustable too. Still will buy another, though...