I have just (literally yesterday!) bought a second hand VW Up! 2012 which came with the detachable sat-nav system. I managed to connect my phone via bluetooth easily and figure out how the maps worked. However, I wasn't able to get any audio playing through the car radio, and when I press the Media button on the sav-nav, everything is all greyed out. Can anyone help? I've never owned a VW before or used any system like this so I'm not sure what I'm missing here...