I have a 9900 Bold and whilst I can pair the device, there are issues with the car system then hanging on occasion
Comes up with some error about running out of device memory and then thats the end of it. Only way to get it to reset is to turn the Bluetooth off on the BB and turn the ignition off and leave it for about 15mins. It then seems to come up perfectly OK.
On most occasions, it does work OK. But the odd time it does happen, it can be very annoying, especially when on a long journey and the option to stop is not really there.