Mercedes has nailed comfort in the 2007 S550 – at least when you load up with the Drive Dynamic multi-contour front seats and the Premium II Package. Plush, supportive Drive Dynamic front seats feature heating, cooling, and massage, and are covered in gorgeous, soft leather. Entry and exit are not a problem, and there are soothing armrests for elbows. When sitting in the sun, the S-Class never gets too hot, and the climate system is able to rapidly cool the interior.