iPhone bluetooth pairing with car...

Just did a couple tests with my iPhone pairing the phone to cars with bluetooth enabled navigation systems. I paired with a 2007 Range Rover and a 2007 Chrysler 300 SRT. Both paired pretty easy, you do need the correct pin number (usually 4 digits) to the cars navigation system. After that it only takes a few minutes. Made some test calls on both cars as well, both worked fine. BMW is suppose to support this as well, on some models. I have heard of people pairing with Audi but with some troubles and failed attempts at times. Not all car navigation systems support this feature with the iphone.

1.83 MacBook Pro. G4 iMac. Mac OS X (10.4.10)