I feel very safe in the CLK320. I've owned the car for 5 years and have approx 63,000 kms on it. My family of three fits well in the car. I am 6'2" and I have my seat all the way back, which makes it easy to reach back and put my young daughter's seatbelt on. As she grows into her teens, we will probably go to the S class sedan.
The steering wheel mounted controls are very user friendly and effortless to use.