Having trouble with the navigation voice, i.e. the one that says turn left right, etc. Have went to the menu and have voice at max!! Is there anyway to increase volume beyond max setting? Recently had Motorola V60i mobile phone installed in my '01 ML55....volume seems to have decreased slightly since installation.

Push the button that says "voice" and you will hear the nav voice repreat the last instructions it gave. When you hear the Nav "voice", adjust the nav voice volume with the normal volume adjustment knob.

Gilly