Sorry for my delayed answer. Would it be possible for you, to send me your Car-Ident.-Number?
Perhaps as a private message ? I want to check something (you can trust me, i am from Audi Austria).
As second, could you tell me if the new unit you installed (PR 7UG with HDD) was a used one from another TT or completely new ? Your Dealer was right, the PR 7UH could not be activated currently for the whole "USA", but the 7UG should be possible as i have seen it (it exists an activation right for South-Amerika you can buy and it is for the 7UG).