I absolutely hate it when I can't change the radio station without taking my eyes off the road. No, saying "hey Mercedes" and waiting for a response just to change a station is not acceptable. I don't drive a Tesla and getting rid of every button is not a good answer!
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.