Arrangement for fixing window regulators at vehicle doors

The invention relates to a system for fastening a window regulator on a frameless vehicle door (1) equipped with a fixed front window (2) and a movable rear window (3), the front edge (5) of the movable window (3) being guided by a slide (4) which extends between the windows and whose lower part (4b) is fixed in the door (1). The window regulator comprises a front rail (11) and a rear rail (12) parallel to the slide (4), on which slide cursors (9, 10) displaced by cables (13, 14) actuated by drive means (15). The front rail (11) is rigidly connected to the slide (4), in order to ensure parallelism between these two elements.