I traded up from the SLK 280 for the CLK 350. Does not have the same handling as its baby brother, but the advantages far outweigh this fact. Very comfortable interior and leather seats are very comfortable. The model I have does not have park assist, but I would recommend this option. Looking out the back window it is tough to determine where the car ends. I have the older navigation system which is not easy to use, but the newer models I believe now come with the upgraded voice system. Quiet and very smooth ride. Plenty of acceleration when you need it. I am averaging about 19 mpg combined city and highway, about what Mercedes advertises. HK sound system is great. Nice instrument panel.
So quiet for a convertible. Perfect combination of comfort, ride, sport feel, and fun.
Dump the old navigation system. Make park assist a standard feature.