Join Date: Sep 2007
Location: Mountain View, CA, USA
Re: Nav III - loading Mexico maps?
I don't see why Garmin's City Navigator NT Mexico maps wouldn't work with the Nav III. I think maybe the Garmin support person you got was just looking at the list of Garmin products and didn't see the Nav III so assumed it wasn't compatible. But the Nav III is more or less a StreetPilot 2820, and that's shown on their compatibility list.
I looked at the Garmin City Navigator NT North America page, and they also don't list the Nav III, but I have that product (map upgrade for '08) and the maps work just fine with the Nav III.
If you're worried you could try again and maybe get a better Garmin support person...