Abstract: A fuel tank closure for attachment on the tank filler pipe of a motor vehicle including a movable closure part which selectively opens or closes the access to the interior of the tank filler pipe. Furthermore, the fuel tank closure includes a coupling part for actuating the closure part. The fuel tank closure has a guide pipe which extends into the interior of the tank filler pipe. The guide pipe keeps open a “no-lead flap” which prevents fueling the motor vehicle with leaded fuel. Furthermore problem-free refueling is ensured by the guide pipe.