Didn't notice it said BNav! I assume you have x2 SD card slots and a drive slot in the dash that normally has a navigation DVD in it, with the option to run the nav off one of the SD card slots instead?
And what version is my MMI? It is BBT_EU_P0020_D1. Variant is 9302. I have trouble find update CD for it, I want update it because after 1 year bluetooth stopped working - I can turn ON bluetooth but all options are grey.