The steering function definitely works, it's the other adaptive features like cornering and fog I'm questioning. Mercedes' system is a little different than most.I cant comment on the ML, i have adaptive/cornering headlights on my LS and i can see them turning easily. It is most noticeable when you enter/exit the interstate. Also try parking next to a wall with the car off and headlights in position ON. Then start the car, you should see the lights adjust themselfs.