i did post on another thread but admin pointed me here.
I have a 61 plate (late 2011) Scirocco and an Galaxy s2 (gt-i9100on 4.0.4 with the following i9100xxlq6 ?? (the phone is as from the factory apart from the updates from samsung.)
I was having problems getting the phonebook contacts to go across. the phone would pair ok but refused to transfer any contacts, also the pbap service on the phone would stop.
I was also having various issues because of the update, random crashes of apps, a system app with an icon on the home screen that could not be removed. amongst other things.
I cant tell you how the bluetooth worked before the update as i only just got the car and the phone was on 4.0.4 by then.
So i tried a hard reset of the phone and reinstalled all my apps and everything just then seemed to work. The phone paired and all the contacts went over first time and works flawlessly.
As i said im running a completely standard galaxy s2 and i hard reset by pressing the power volume and home buttons on the phone and resetting inside the bootloader menu.
hope this helps someone.