Can anyone clarify whether there is a SAFE way to mute the navigation directions while you are on a call using the bluetooth? All of the posts I am able to find talk about accessing the audio settings console and shifting balance between center speakers and peripheral ones during the call which is a ridiculous option if you are driving down the highway at 65 mph. I can't believe there isn't a setting somewhere that automatically toggles between the audio sources. Any ideas? Sorry, for what a Rav4 Hybrid Limited runs this should be a no-brainer.