So I have had this leak from my tank that I noticed the first time I filled up. Thought it was the level senders hat seal as that's where it was soaked. Well I replaced it and its just as bad if not worse. Checking it today I can see the leak is coming from a vent seal on the front edge of the tank. I am already dreading dropping the tank but I cant seem to find the part or what it is called or a part number.
I do have an Audi diagram and it shows it, just no part number. Please can someone identify this? I circled the part in red.