Done this myself with SA644 with 3ed Gen ULF MIt SES and Sat Nav retro fit and coded by the dealer and the printouts from the Techy indicate i now have SA601,609,644 and SA620 which is VR and i can use VR for both BT and Nav.... ie press speaker button say'Map' if on computer,BT menu or Television the screen changes to map... or say ' Scale 100 metres' the screen will change from 900yds to 125yds...(only problem is metric is only recognised for distances on VR and not yds!!!! can live with that....) by the way i do not have the voice input module either... just the bt ulf.... but on other forums people cant get the VR to work even if they have ULF mit ses from factory spec cars... weird....
UK Car. I know it is not alot of help but it should work, my coding was for retrofit oem kit... maybe that is the difference...