Yep, the RNS510 needs a seperate bluetooth module fitted to the car. Bluetooth can be added for a couple of hundred quid or so, or less if you can pick up a bargain on the forums or Ebay. Also, a DAB version RNS510 will set you back over £500 to start with. The RNS315 might be an option perhaps, depending on how old your car is as there's some compatibility issues with older cars (can't say what as I've not had enough coffee this morning).
