Already done. Goto the source menu switch to "off". Hit menu button>settings>av settings>Lower left button says something about ATT/mute. That button is the toggle between mute and att for nav directions but it can only be changed when the av source is switched off.
Nope, i know that, but that's not what i meant. When in the option menu you mentionned i select (for example) ATT (=attenuate), it will attenuate any mp3 file in order to hear the navigation instructions... HOWEVER, if i'm listening to FM Radio (with that same option) it WON'T attenuate the radio when giving the inst
