It's not just Audis. My wife's Yaris has an auto-park and an auto-fuel option.
She just leaves it in the drive each night and miraculously, every morning when she goes outside, its ends up inside the garage - and each time she arrives home with an empty fuel tank, its miraculously full again by the following day.....
She's had it six years, done 52,000 miles and only had to fill the tank. How's that for fuel economy! And even then, she had to ring me from the pump and ask "Do I put Shell Ordinary or Shell Optimax in it". So I said "just Shell Ordinary" - and guess what - the receipt showed that she filled it with Optimax! lol....
Oh and I forgot to mention the "auto-wash" option too.
It comes home dirty on a Friday night and by each Monday morning, its clean again!