I have a 2008 S550. The audio volume from the Navigation system is pretty low. If I have my radio volume turned up a bit, it's hard to hear the audio navigation commands.

How can I increase the navigation audio volume?

 

when the nav voice is speaking use the radio volume to raise the nav voice.

 

This is a problem, because the navigation voice doesn't silence the radio's music (at least on Sirius XM, which I am listening to), and raising the volume makes the louder across the entire spectrum. I'll try your suggestion, though, with a regular radio station tuned in tomorrow.

I love my car. I wanted a Mercedes since my first visit to a Mercedes dealership in 1972 when, as a university student, I was turned down for the loan.

 

Thanks, you are right. I adjusted the volume while the nav audio was active, and it changed that volume independently of the normal radio volume.

John