[snapdragon]

Just burn this to a CD - and pop it in the CD changer in the glovebox.
It's a bit clunky and slow by today's standards, but will tide you over until you find a paper book.
I have not yet seen a PDF of the manual.
http://www.audi-resource.com/docs/AudiA8MMIOnboard.iso
from:
http://www.audi-resource.com/manuals.php