Switch the call between the car kit and phone
If you have connected a compatible phone to the car kit using a
connectivity cable, remove the phone from the mobile holder or use the
phone keys to switch the call from the car kit to the phone. To switch
the call back to the car kit, place the phone in the holder.
If you have connected a compatible phone to the car kit using Bluetooth
technology, to switch the call between the car kit and phone, press and
hold the Navi wheel for about 1 second, or use the respective function in
your phone.