I have a 2016 XJL and can’t figure out how to adjust the volume when using the navigation function. The speaker in the driver’s door appears to be the source of the navigation voice, but it is both full of bass and somewhat low volume, so at times is difficult to hear over the radio and road noise. I looked at the manual and looked through the different prompts while in the navigation mode; I felt blind and deaf, as I didn’t find anything. Thanks for your help.

 

You can adjust the NAV volume while the direction is being spoken with the radio volume knob