Went to use navigation in my '05 545i and the street address was too new to come up. So, I put the address in my iPhone using Google Maps. To my surprise, all of the voice directions from Google Maps on my phone came through the car's speakers! I tried it with Apple's Map app and the Mapquest app and neither of them utilize the Bluetooth connectivity to provide turn-by-turn directions through the car itself.
2005 545i, Jet Black, Black Leather, Cold Weather pkg, Logic7, 6 disk changer, Sport Package, Automatic, moonroof, electric rear sun shade, dark wood trim, PDC, Xenon Adaptive lights, Nav, Sat radio, 245/40 ZR18 - 275/35 ZR18 tires, Progman 30.02