Hi all I have a e39 528i sport with all mtec extra etc etc It has the built in nav screen etc but it shows maps and roads but won't let me find a destination or start a navigation it just shows the map and it looks like something from n ancient games console Can I update it all some how and make it work so can be used as a sat nav not just a map screen???? Is it just a case of putting in an updated disc???? Any help or advise be great thanks