Update: Efter the latest firmware in my Samsung Galaxy S3 (LH1) I have lost all contacts permanently in the car - I never get ANY contacts downloaded.
The same goes for the previous version of the firmware as well.
It's a shame that Samsung can't get this working. The S3 is supposed to be Bluetooth 4.0 compatible - but it is not.
Current advice is: Stay as far away from the Samsung Galaxy S3, if you ever plan to use it with a BMW bluetooth connection - it will simply not work.