It bothers me when my navigation should appear on the dashboard. It is not sure enough, especially since my Navi measures 7 inches and thus is not exactly small. I screwed the ball joint to the existing Navi-slot fixing my cars. On the ball joint then comes the Navihalterung. So you need easy to mount the Navi, it is tight and everything works fine. The ball joint is firmly mounted with 4 screws Navihalterung snaps then, and everything is safe. A great solution