bylife

When My MB activated the Android Auto, I could not play Music from mobile. It was only available for TuneIn radio (directly log into Tunein MainPage). Whatever how to disconnect and reconnect again, for media, there is nothing to choose except tunein (only under the tunein operating screen).

I cannot use screen touchable function (not for GLS), also I cannot use multisystem media controller to go to the top menu (exit tunein).

Everyone know the solution, please share it, thanks in advance.

ZeeGee

You can switch to other apps for music playback, see this video:
The part where he switched music playback app starts around 4:10

bylife

Thanks for the link.
But, still can not play music mp3 from mobile.