a plane perpendicular to the steering wheel axis the detent section 28 of the positioning element 22 with the angled tongue 30 and the contour 44 of the side wall 42 of the covering cap 38 are coordinated with each other so that the covering cap 38 engages with the positioning element 22 by pushing in axially secondary detent engagement the form or force fitting axial fixing by the secondary engagement is designed so that a repeated installation and dismantling of the covering cap 38 is possible the free tongue 30 of the detent section 28 is pre stressed in the installed state i e it exerts a force onto the covering cap 38 and hence onto the gas bag module 16 which has a component in the axial direction and a component in a direction perpendicular thereto when several positioning elements 22 are used this results as a whole in a defined positioning of the gas bag module 16 relative to the adjacent shield 18 with a pre stressing which counteracts vibrations of the movable gas bag module compression springs or suchlike which are otherwise usual for damping vibrations can therefore be dispensed with if the gas bag module 16 is pressed down in axial direction to actuate the horn the positioning element 22 with the exception of the lower arm 46 also moves practically without friction the fitting sections 32 34 and the detent section 28 provide for a guidance and an actuating force or restoring force in order to offer a certain resistance to the movement of the gas bag module 16 and in order to move the gas bag module 16 back again into the initial position the actuating.