FILLER NECK OF A WATER TANK OF A MOTOR VEHICLE

A filler neck of a water tank of a motor vehicle includes a nozzle element having a filling opening, a drain opening, a drain cylinder arranged at the drain opening, and a vent opening is provided for venting the water tank. The drain cylinder is in operative connection with the water tank. The filling opening is surrounded by a funnel edge of the nozzle element, which is configured to receive a cover. The nozzle element includes an overflow opening configured independently of the filling opening and the vent opening.