Maybe I'm a dreamer, but I have a vision of making long (and economical) road trips in my new M3, sleeping in the space when I fold down the rear seats, using "camper mode" to keep the car comfortable, stopping at large truck stops (Pilot or TA) to buy a quick shower and then, I'm on my way again. Has anyone done this? Does the M3 even have what has been called a "camper mode" yet? Do the rear seats fold flat? Thanks!