Also did you know that, you don't have to disengage the parking brake everytime you want to drive. Next time leave the parking brake engaged and then just step on the gas pedal, it will automatically disengage. This also works for reverse.
Also did you know that, if you are on an incline, and you let go of the brake with the car in D or S, the M5 will start to roll backwards, but it will only roll backwards for a few moments before slowing itself down and then it will speed up again and the slow down again, until you press on the gas pedal again to start moving forward. Pretty cool. It's much better than the E60 M5 hill assist function, where in that car, the M5 will let itself just keep building up speed from rolling backwards on an incline.
Why did Santa Claus buy a BMW M5 instead of an M4? Because he needed the back seats for his Ho Ho Ho's.