Hi Pete,
I got all the info from the diy install voice recognition module from this site x5world 01 09 2006 it is highlighted in'' articles''
My module is exactly the same number as the one shown, and the plug that is shown has the same pinning arrangement to fit the module BUT I think you may have hit on the problem.
This was written for a US X5 and I had the module flown in from the US.
SO perhaps the european plug is different.
Regards,
Lez