I have a Mercedes C Class with Comand Sat NAV which is factory fitted with Bluetooth Connectivity. I have successfully paired and connected my Z10 to the car system. I can make and receive phone calls. I get the phone book list on my dashboard screen but no missed calls or received calls or dialed call lists as I did with my previous Torch 9800. Also when a number is engaged the Z10 sends no signal or busy tone it seems like the number didn't connect you have to look at the phone screen to see if they are engaged. Again with my Torch I would get the busy tone come through the blue tooth car speakers. Any help would be appreciated. Although I think this requires an OS fix from BB.