As noted, the link to the upgrade does not work. I would like to find a place where I can understand exactly how the DVDs etc. and the navigation system work; especially what the updates bring. Mine is a 2004 E64 with the Mark IV system. I read a lot of stuff but can't tell if the comments will apply to my system as a lot of them are older systems. The Navteq site wants to sell a update for $199, which seems to be a lot as I upgraded my Garmin for a lot less than that. I like what I have in the 325, but like some of the features of the Garmin a little better. I can use any help available.

CBS