Mounting assembly for a vehicle roof rail on a vehicle roof

The assembly has a plate (20) with a top side (21a) that is adapted to receive a lower side of a corresponding head. A passage opening (22) of a fixing unit and a lower side of the plate are equipped with housings for receiving a sealing unit (24) around the opening and forming a support surface on a roof of a motor vehicle. The plate includes a centering point comprising a head supported on the top side of the plate.