Originally Posted by macgirl
Have you checked out the Bluetooth menu on your iPhone? Go to Settings/General/Bluetooth and hit the blue arrow to the right of your car's Bluetooth ID in the Devices list. You should have options there on which contact groups are shared with your 650. However, I will say that I have had limited success with this menu - I have checked only one group but all of my contacts still upload to my X3, making it very hard for me to scroll through the contacts I use the most in a special group I made up.

I will try this later, thanks!
Have you tried "re-pairing' the iPhone and the X3 after selecting the single "special" contact group?
I will report back on my efforts, thanks again!