It is possible to remove phones from the list of registered Bluetooth devices, for example.
Press Settings in the top view.
Press Communication → Bluetooth Devices.
Registered Bluetooth devices are listed.
Tap on the device to be removed.
Tap on Remove device and confirm your selection.
The device is no longer registered to the car.
If you have a new device and it has the same name as one you have previously connected to the car, you may first have to delete the old device from the car's list of previously connected devices. After that, the new device is connected as normal.