On US models without iDrive, you can pair your phone and make/receive phone calls. However, you will not be able to stream audio through bluetooth. In order to play music you will need to use the Aux port and a 3.5mm cable to connect your phone with your car.
Another option that I am currently playing with is the Blackberry Music Gateway. It plugs into the aux port and a is powered by a micro usb cable and will enable your non-iDrive car to stream music via bluetooth. It works really well for me so far and can be tucked out of sight with very little effort.