Hmmm
Thanks, Spockcat, I followed your instructions and now the nav-instructions-volume is indeed lower - not giving me a scare anymore but 'time' to adjust both the phone and nav volume without a panick reaction. But I still need some more time to test these settings. Yesterday I was listening to a cd with the volume turned up to a comfortable level (I admit, rather high) - and there it was again: the nav-voice came out extremely loud again. Way much too loud, intend on overmastering the cd-volume at all cost. I almost went through the roof, this really took me by surprise!
This is what happens in all other cars that I know that have built-in navigation: the moment you use the phone, the level of ALL other noise-sources (radio, cd, navigation) automatically goes down dramatically (or shut down altogether) + come up again as soon as the phonecall is ended. In my husband's car (a Volvo suv), the nav-voice is even replaced by a very soft 'gong' sound during a phonecall, so that you know you have to pay attention to the road because there is a nav-instruction 'going on'.
Is this possible in the T'Reg? The radio and cd 'shut down' during a call. Why not the nav-voice?
Looking forward to your (and others) reply!