Mercedes' advantage is often its chill cabins, sharp without being ostentatious, loaded without being too overwhelming, and most of all, comfy. The tabletlike display screen could be better integrated into the dash — Audi still has the edge there — and Mercedes finally killed the number pad and claustrophobic center stack for a simpler, horizontal band of buttons for radio and climate. The controller, however, is as odd as SUV coupes. It's humped for your palm to rest on or to use as a touchpad, then there's a push-dial below it to toggle through the various submenus on the screen. It keeps the design uncluttered, but the palm rester/controller overhanging the dial is funky.