I've got a post that fixes all issues when you delete the original maps and don't have the overall.nds file. Previously I'd helped people to find the copy they came from, a lot of fiddling around to find the download. Then I got a more switched on poster who had found the one I couldn't, to find the one before. The penny dropped you can just go back to V1 of the Seat mib2 card to get the overall.nds file then that works with whatever release there after. That aspect hadn't been identified so I put that up.
Post 2075:
https://forums.seatcupra.net/index.php?threads/navigation-system-updates.388586/page-104
See under
Lost, Stolen and Missing Cards from a Mib2 Standard Unit
Version 1 mib2 link there. That overall.nds file in that one fixes all issues
.
I re-read Exciters and Notabens original posts. They don't know what is in that file but Exciter noted it dropped down between releases. That drop down position is effectively the year marker. With Mapcare you can always go backwards so using an older overall.nds file via the workaround always works since its a feature of Mapcare
.
That post is the summary of all knowledge on mib2 standard including
how to upgrade to a 32gb card
Taking in what we recently learnt on that thread. The unit is locked to the overall.nds file or any before the release you were on. The VAG cards are interchangeable in the unit with the workaround. There is a common run in set of codes in the CID that enables this but no exact lock of the card to the unit only ther overall.nds file. Thank fellow posters that have all contributed to the knowledge.