1. Yes. With the split screen shown, move the i-drive knob to the right and then click. A menu will come up with the different screens available.
2. Your CA should have setup your assist information. If he/she did not, then call them and make sure you have a user name (e-mail address) and password. Then make an assist call via the SOS button to verify you connection, username, and password. Once you are all setup, you use the user/password in the remote app to get connected.
3. I think it should work over bluetooth, but I don't know for sure as I don't have BMW Apps; just NAV and Assist.