I bought a 735i bj 10.2001 last week I just noticed a few days ago that there is no cd in the navigation computer and I was looking stupid and stupid. I have now read that there is somehow mk1 mk2 mk3 mk4 and nav01 nav02 nav03 nav04 and that there are navi cds and navi dvds I just don’t look through. What kind of navigation computers do I have now and what kind of cd/dvd do I need now? Have a picture of my navigation computers gema Thank you very much already in advance