I've read the manual and know that I can mute the Tuner by touching the volume ****. I can turn it off by holding it in for a second. The problem is that when it is *off* the screen does not come on for the reversing camera or anything else until the unit is turned on again.

Does the above mean that the Tuner/Radio can only be muted (and not turned off) when the rest of the services, back up camera, Nav, etc are being used?

Thanks!