Bought this '05 4Matic certified pre- owned two years ago. I have never had a car which was this new, in the shop as many times as this! Valve cover blew, problems with the automatic window/sunroof "summer" feature in the door handle, voltage regulator replacement after dash lights kept dimming, differential replacement, and now, knocking in the front end. Interior feels cheap, radio is absolutely horrible. "Leather seating inserts" are a crafty way of saying "mostly vinyl." Loud clunking of windshield wipers, and blasting loud defroster which first makes the windows totally fogged up, then clears them. Go figure with that one.
Bad things aside, it drives great and is actually fun to drive. Decent in the snow with no problems.
Better climate control system, sound system, quieter windshield wipers, dependability. For such a little car, fuel economy could be a lot better.