I recently upgraded to a CCC. Several days after having it, I was completing the radio presets. I didn't realize that you must have the radio displayed on the screen to do this, and listening to it might not be enough. I knew I could assign positions to the SAT and normal radio channels while pressing and holding each button. During this process I was actually in the navigation mode and it was displayed on the main screen so when I pressed and held the button to assign the radio station, I actually assigned this particular button to a navigation position. Anytime I press the preassigned button the navigation starts and begins calculating the route. Pretty hand for a home position or one that you use often, and a lot faster to do thin instead of looking in the address book...

 

Funny - I never bothered to use the button presets. I'm "stuck" on using the voice commands or using BMW Concierge.