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Originally Posted by rvancil
I've been reading through this particular forum for the last 2 hours and am completely lost with all this upgrade talk...does the firmware in the actual system need to be updated or is it just an updated disc?
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NAVTEQ is the source for map discs. You can also purchase them from any BMW dealer, though they may not stock them. List price is $199 for the DVD map.
That is the actual map data. The "software update" we talk about here is the operating system for the navigation computer, which is loaded from CD once and then runs from the flash memory in the computer.
Map updates concern things like new roads, streets changing to one-way, etc. while the software updates add features like selecting destinations by zip code, adding a perspective view, etc.
You can generally update one without updating the other, though the only combination the manufacturer tests is latest map + latest software.