Android Auto device

[ColGoo]

I have a wireless Android Auto device for my car that automatically connects for both calls and audio. However, I want to disconnect for calls and leave it as audio only, as the car has its own hands free system. When I go to bluetooth settings on my phone, I can turn calls off but it turns on again almost immediately afterwards. Is there any to overcome this?

[Obsydian]

That won't work, plus with Wireless AA your using WiFi direct and BT.

Unsure why you want split control for audio and calls in the same car.