Want To Set Default Usb For Audio

[Rolla85]

Hello everybody,

I have a question about the audio system. I had earlier paired my phone via bluetooth and every time when I want to start the car, the default mode is set to bluetooth when I left (last used) the car using the usb music stick. When I left (last use) the radio FM, they start too with the radio.

I want to reset everything so that everytime the audio starts with playing USB. I have asked the dealer and they said you must delete all paired devices, but even that not helps.

It's the model (I think Panasonic) without navigation. (see attachment).

I hope that somebody can help me..

Thanks in advance!