Just checked on my system and command is indeed "navigation announcements on/off"
I can't remember if I had to do some setting up when I first got the car i.e. training the system to recognise my voice like some previous voice activated systems I've used - maybe that's where your accent comes in?![]()
So me shouting "shut the f..k up !" In my broad Brummie accent is not helping then. I did wonder......