PCM Radio questions
After two weeks with my new car, I am doing well figuring out the PCM, but have two questions. First, I cannot seem to run the navigation system without the radio comming on. Can turn down the volume on the radio, or mute, but it is still on. Second, the car has the multifunction steering wheel, but I have not figured out how to move through stations stored in preset memories A, B or AS using the buttons on the wheel. You can get to the stations using the numerical keypad, but I would have thought you could do this on the stearing wheel. Any help would be appreciated.

Rant over.