So I decided to see if the CD changer worked, so picked up some blank CD's. Also pulled my NAV disc to look into that. Realized I have disc 4 (South Central). That's the disk from where my car came from, but isn't the disc for my area. I need disk 3 (North Central). Did these come with all the disc when new?? Where do they go??

Anyway, anyone updated to MKIV and have MKIII disk laying around they could part with? Or have a disc 3 they could part with??

One of these days I might upgrade to MKIV, but with them stopping new disk in 2015 I don't know that it's really worth it anymore. It's more one of those "want it to work just because" things.