Window assembly (170, 270) for a window opening of a motor vehicle having a front-rear direction, comprising: a door frame member (21, 22) having an outer surface; a movable window pane (130, 230) having a guiding section (136, 236), and a window section (131, 231) including a window outer surface (132, 232), the guiding section (136, 236) comprising a guiding surface (138, 140, 142, 143, 144, 240a, 240b, 242, 243, 244) being configured to contact a guiding member; a window sealing profile (100, 200) including a mounting portion (101, 201) that is fastened to the door frame member (21, 22) and having a sealing portion (110, 111, 112, 120, 210, 211, 212, 220) being configured to seal the window pane (130, 230), the mounting portion (101, 201) comprising a mounting leg (102, 103, 202, 203) and a mounting base (104, 204) that is connected to the mounting leg (102, 103, 202, 203), the mounting leg (102, 103, 202, 203) and/or the mounting base (104, 204) having a bracket support (106, 206) configured to support a guiding bracket (150, 250); and a guiding bracket (150, 250) having a trimming surface (155, 255) and being configured to guide the window pane (130, 230) along a direction of movement between an open position and a closed position, the guiding bracket (150, 250) being further configured to be fastened to the window sealing profile (100, 200) and to the window pane (130, 230), wherein the guiding bracket (150, 250), when in the fastened state, is simultaneously engaging the window sealing profile (100, 200) and the window pane (130, 230) wherein the guiding bracket (150, 250), when in the fastened state, is configured to apply an inward directed force (F I) so as to press the window pane (130, 230) towards the window sealing profile (100, 200), characterized in that the guiding bracket (150, 250) comprises a fastening limb (151, 251), a guiding limb (154, 254), and an intermediate limb (153, 253) connecting the fastening limb (151, 251) to the guiding limb (154, 254); wherein the guiding bracket (150, 250) comprises a separate guiding member (160, 260), the guiding member (160, 260) being disposed at the end of the guiding limb (154, 254); wherein the guiding section (136, 236) comprises a receiving opening (145, 245) being defined by the guiding surface (138, 140, 142, 143, 144, 240a, 240b, 242, 243, 244) and extending in a receiving direction which is parallel to the front-rear direction; and wherein the guiding member (160, 260), when in the fastened state, is received in the receiving opening (145, 245) and is supporting the guiding section (136, 236) in a sliding manner. a door frame member (21, 22) having an outer surface; a movable window pane (130, 230) having a guiding section (136, 236), and a window section (131, 231) including a window outer surface (132, 232), the guiding section (136, 236) comprising a guiding surface (138, 140, 142, 143, 144, 240a, 240b, 242, 243, 244) being configured to contact a guiding member; a window sealing profile (100, 200) including a mounting portion (101, 201) that is fastened to the door frame member (21, 22) and having a sealing portion (110, 111, 112, 120, 210, 211, 212, 220) being configured to seal the window pane (130, 230), the mounting portion (101, 201) comprising a mounting leg (102, 103, 202, 203) and a mounting base (104, 204) that is connected to the mounting leg (102, 103, 202, 203), the mounting leg (102, 103, 202, 203) and/or the mounting base (104, 204) having a bracket support (106, 206) configured to support a guiding bracket (150, 250); and a guiding bracket (150, 250) having a trimming surface (155, 255) and being configured to guide the window pane (130, 230) along a direction of movement between an open position and a closed position, the guiding bracket (150, 250) being further configured to be fastened to the window sealing profile (100, 200) and to the window pane (130, 230), wherein the guiding bracket (150, 250), when in the fastened state, is simultaneously engaging the window sealing profile (100, 200) and the window pane (130, 230) wherein the guiding bracket (150, 250), when in the fastened state, is configured to apply an inward directed force (F I) so as to press the window pane (130, 230) towards the window sealing profile (100, 200), characterized in that the guiding bracket (150, 250) comprises a fastening limb (151, 251), a guiding limb (154, 254), and an intermediate limb (153, 253) connecting the fastening limb (151, 251) to the guiding limb (154, 254); wherein the guiding bracket (150, 250) comprises a separate guiding member (160, 260), the guiding member (160, 260) being disposed at the end of the guiding limb (154, 254); wherein the guiding section (136, 236) comprises a receiving opening (145, 245) being defined by the guiding surface (138, 140, 142, 143, 144, 240a, 240b, 242, 243, 244) and extending in a receiving direction which is parallel to the front-rear direction; and wherein the guiding member (160, 260), when in the fastened state, is received in the receiving opening (145, 245) and is supporting the guiding section (136, 236) in a sliding manner.