Those instructions are not correct. The vehicle never asks for a bluetooth passkey on I-Bus equipped cars with BMW assist with integrated bluetooth.

If you press the R/T button you should see "Activate Phone" on the screen. Thats your prompt to search for bluetooth devices on your phone and pair with BMWXXXXX using the supplied Bluetooth passkey. This is all done via the phone. You dont need to do anything on your headunit/NAV screen.

Once the phone is paired you should see a message to say the phonebook is downloading. This normally takes a few moments depending on how big your phone book is. In some cases, with certain handsets, special numbers such as +, p, can cause problems ... its sort of luck of the draw ! Also you may need to turn the ignition off and back on again after the phone paired with the car for the very first time.

Having said all of this, the pairing process maybe different for European equipped cars.

Hope this helps.