I was sitting in my car today and just used my finger nail to push down towards the floor the little black piece on the left side of the NAV DVD cover. Once the cover is off, there is an eject button for the DVD on the right hand side.
Thanks for the insight. I didn't have the confidence to 'force' the button / cover off before. I assumed there may be a trick to the eject and it was some how linked to the clip on the left and that was infact a door to the DVD chamber. Disappointing to know it is only a cover. Anyway, now I can do the upgrade.
Yup, they're rare.. I have AC that I got from a dealer and have burned a DVD-R DualLayer of and and have found it to be a little buggy, but not too bad... AB was less buggy and didn't seem to have a difference in my area as far as which stores weren't there anymore and roads not being updated.
Ohhh well, when AD comes out I'll probably make another DVD burn. I wish manufacturers would allow you to download the DVD for a reduced price. Or be able to purchase an upgrade plan that covered it in monthly installments.