It looks like you have to have iDrive for bluetooth streaming:
Originally Posted by tahoe_bound
As far as I can tell, there is nothing enhanced with the enhanced Bluetooth option. I ordered it on my X1 without navigation hoping to get streaming Bluetooth. Picked up my car last Saturday but there does not appear to be any Bluetooth streaming. However , my iPhone 5 connects with the lightning cable which did not work on the base car so not a complete waste. Love the car though and glad I choose it.
I think iDrive is worth it, but that's just me.