It starts and shuts off. Have you checked the fuel pump relay? Here is a video. Watch it because it is a pain to get to them. They are under the dash. By the way, has the check engine light come on? You can get an AUDI/VW scanner online for under forty dollars.They are very helpful. I have an A4 and A8. Without the scanner, I would be pulling my computer out all the time. If you do have a scanner, check to see if there are any trouble codes.
Let me know what you find. Note: I just fixed a Nissan Titan (not and Audi, but the exact same problem). It was the ignition relay which also controls the fuel pump. Just food for thought.
VIDEO:
https://www.youtube.com/watch?v=YVWpJto0ui0
Sunday, February 11th, 2018 AT 7:57 PM