No fee. The Navigation system uses free information from the GPS
satellelites to determine where you are and stored information on a
DVD-ROM in the trunk to turn that information into a map. You can buy
map updates as often as once per year if you want to at a cost of around
$185. So far I'm updating ours every three years.
The latest Garmin portable units are now getting pretty good for under
$500, so you might want to think hard about the Garmin vs. a dedicated
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