2004 C230 NAV ?
1. Do I need to bring it to he dealer to update software before updating the maps?
2. Can I install maps of different years together, say I find a 2007 map with the eastern US and a 2008 map of western US, can I install both or do they all have to be the same year?
As for nav.discs: there are 10 or 11 discs that cover the USA / Canada. It doesn't really matter what 'year' the maps are, as long as you make sure to:
* purchase an original navigation disc (copies can severely damage the nav.drive)
* purchase nav.discs that are compatible with DX comands
greetingz,
BigSis



