Motor vehicle tank cap with seal and fixing unit for fixing to tank filler-neck

摘要

The tank cap upper and lower parts (2,3) in the closing direction are rotatable relative to each other after reaching a selected torque, and can be coupled in an opening direction. The indicating unit (20) includes parts, which are movable relative to the tank cap upper part and/or the tank cap lower part. The parts of the indicating unit are axially movable relative to the tank cap upper part and/or the tank cap lower part. The indicating unit includes at least one optical and/or acoustic and/or scannable indicating element.