Originally Posted by Xanith
Try to disable the wifi on the iPhone while using bluetooth. I read on another BMW forum that this might resolve your issue.
I use the iPhone with my 335 without trouble with wifi disabled.
I too have begin to have issues with the bluetooth between the car (750iL) and iphone. Each connection begins garbled and after the first 5 seconds they (car and phone) begin to "wake up" and work. I am going to disable the wifi on the iphone and see what happens.