I've had best results with Nav screen with maps up, and obviously navigating somewhere. I've only used the center stack volume nob, not the steering wheel, but both should work the same.Now let’s see if we can help you since you can’t seem to get it to work.
Can someone with a 22 W/nav please Help with nav volume? Is there a trick to it? Do you have to use the screen button? Does it need to be on a certain screen? Can you use the volume control on the steering wheel?
Well worth the time to help just to get one more distraction off the road.
prompts, i.e. the notification tone or sound, is not adjustable. Just the spoken volume of the voice.