How can I adjust the volume or turn off the NAV systems speech?
Press the hard button on the Navigation system that resembles a musical note. A screen will appear that allows you to adjust the audio output of the system. One of the options within this screen is Volumes. Pressing this button will take you to a screen in which you can adjust the Nav system’s volume, including muting the voice guidance entirely. Additionally, the NAV system volume can be adjusted any time the system is speaking by adjusting the volume with the regular volume knob.