Vent Pipe
WARNING: This page is about a different car, the 2011 Jaguar XKR, 2011 Jaguar XK, 2010 Jaguar XKR, and 2010 Jaguar XK. However, it is still accessible from the selected car via links, so may be relevant.
The vent pipe connects the vent connector at the right rear corner of the fuel tank to the stub pipe in the head of the fuel filler pipe. Quick release connectors attach the vent pipe to the vent connection and the stub pipe. Cable ties secure the vent pipe to the fuel filler pipe.