Join Date: May 2017
Location: North Palm Beach, FL
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To bring my story full circle, I ended up buying the upgrade from vag technik. I received 3 Audi branded SD cards. One with the MMI update, one with the Maps update and one with the license key for the maps. I hooked the car up to a battery tender, got into the Green screen and started the MMI update. Took 25 minutes or less. I wasn't watching it. At the end of the update you need to return through a screen and then scroll through to the end of a couple of pages of options and hit continue.
Map update took maybe 3 hours, again I wasn't watching. At end of Maps update you need to start NAV and then wait for an access error, insert the license card and reboot MMI. Or something like that, instructions weren't specific. In any case, everything is working. I checked version numbers and both MMI and Maps are the latest. MMI is HN+_US_AU3G_K0942; Maps is 6.16.2.
To be honest, I have not noticed any difference in the functioning of MMI or Nav, although I haven't made any road trips yet so maybe exit information is updated. Also, it may be my imagination but screen image appears clearer!