This is well within the Lemon Law act. He can ask for a new car all together!! I would! (Not sure if he's doing that, long a$$ thread)
Worth it to call a lawyer!!
I've had, on occasion, major issues with new Audis (work at a dealership) and those customers who demanded another vehicles did got one!! Sometimes with more options!
I wouldn't want my new car from the assembly line taken apart and reassembled!! HELL NO!!
My two cents.
Also: The Audis all burn oil and have a "Min Oil" warning (level sensor) since it's expected!
Audi states that increments as low as 1500 miles is normal.
Luckily we don't see that often!