Abstract: A tank filler neck including a filling line having an insertion end further away from the tank, designed to temporarily insert a breather pipe into the end region of the filling line further away from the tank, a passage line end closer to the tank, designed for passing through liquid in the direction away from the insertion end, a ventilation volume designed for through-flowing gas while passing liquid through the end of the passage line, a ventilation line which ends at a distance from the filling line and which can be blocked or released by a ventilation valve for through-flowing gas, a detecting device designed to detect a passage-ready state and/or a passage state of the filling line, and an operating device designed to adjust, as a function of the detection result of the detecting device, the ventilation valve between the blocking position and the release position.

Abstract: A motor vehicle operating liquid tank, in particular for storing aqueous urea solution, with a tank shell surrounding a tank volume and with a tank opening extending through the tank shell, wherein a planar heating device in the tank volume is provided with an electrical resistance heating track arranged sandwiched between two plastic films that oppose one another in a planar manner and encase the resistance heating track, the plastic films opposing one another in a planar manner and each have a layer of compatible, thermoplastic plastics at least on their surfaces facing one another which are connected to one another locally at least along a seam track surrounding the electrical resistance heating track, wherein slot areas are provided inside this seam track in which plastic film sections lie opposite one another in an unconnected manner without the intermediate arrangement of a section of a resistance heating track between them.

Abstract: A liquid container for a motor vehicle, especially an urea solution container, comprising, as a container component, a tank surrounding an uptake volume, and, as a further container component, a filling line, which, in flow-mechanics terms, connects an admission location placed outside the tank at a distance from it, with the uptake volume, wherein at least a main section of the tank and at least a main section of the filling line are configured to be rigid so that they in essence remain free of deformity when the liquid container is used as directed, wherein on the tank and/or on the filling line at least one auxiliary tank or auxiliary filling line body surrounded by the filling line that expands the intake volume or the filling line volume, is formed, or is able to be formed by increasing the pressure in the interior of the liquid container.