Driver for a movable window pane, window pane arrangement

A driver for a movable window pane of a motor vehicle, comprising:

• a receptacle recess for receiving an edge section of the window pane;
• an elastically displaceable detent lug adapted to engage with a latching cutout of the window pane for locking the window pane on the driver, the detent lug obstructing the receptacle recess in an initial position;
• and
• wherein the detent lug has an insertion taper so that the detent lug is displaced out of the receptacle recess by an insertion of the window pane into the receptacle recess,
• wherein the detent lug has a catch groove in the insertion taper that extends substantially parallel to the receptacle recess over the entire width of the detent lug,
• wherein the catch groove is arranged in the latching cutout of the window pane when the window pane is inserted into the receptacle recess, and
• wherein the insertion taper has an upper first guiding section and a lower second guiding section that have an inclined orientation to each other, wherein the catch groove is situated between the upper first guiding section and the lower second guiding section and wherein an upper edge of the latching cutout of the window pane directly contacts the upper first guiding section of the insertion taper when the window pane is inserted into the receptacle recess and the detent lug is in the initial position.