Android car

Android Auto no longer works in bmw

 Hello.  Android Auto hasn't worked in my bmw for 3 days.

 Can't start it in the car's on-board computer either.  Neither connect nor delete my phone.

 Was still connected to the vehicle via hands-free system.

 Tried to fix this by unpairing and re-pairing.

 Now my cell phone can't find my bmw's bluetooth or wifi and vice versa.

 Please help