At the risk of this going on forever.... both my Tomtom One and my E-class Comand use Navteq maps as the base (see the "Navteq on board" logos and the "who we supply" links on their website).
Tomtom just decided to tell us the file structure their apps expect to read (on the data card or hard disk) so we just add POIs and favourites using Windows explorer - the app then loads them as overlays on the map.
Merc could do the same (except a DVD-R would be needed for each change - which would be fine at a few pence each). They just decided not to.
Navteq don't make the navigation application for either company - they just supply the mapping data, including the subset of Navteq's huge POI database that each chooses to subscribe to.
Tomtom just decided to tell us the file structure their apps expect to read (on the data card or hard disk) so we just add POIs and favourites using Windows explorer - the app then loads them as overlays on the map.
Merc could do the same (except a DVD-R would be needed for each change - which would be fine at a few pence each). They just decided not to.
Navteq don't make the navigation application for either company - they just supply the mapping data, including the subset of Navteq's huge POI database that each chooses to subscribe to.