Struggling to find any data on transmission oil change interval on the V12 audi Q7 tdi ?

I can find no dipstick anywhere and no mention of it in owners manual or service regime ?

 

If it is anything like the ford powershift auto box which is also 'sealed for life', recommended change interval is 80ish thousand miles. It will need plugging into a computer to cycle the valves etc in the box as it's being changed.