Hi all, daughter has a golf mk6, when we took it for mot recently it was noticed that the fuel tank had a slight deppression in it. The tester thought it could be a blockage in the vent pipe as when you take the filler cap off there is a hiss of air going into the tank. Does anybody know the route and outlet of the vent pipe so i can check it out. Thanks for any advice in advance. Sparky100.