4.1.3 Retaining forces Attachments (apertures, covers, etc.)If an attachment is used by means of plastic clips, pressed holders or metal clips,to be attached to plastic, the following requirements of thisSection.Resting force per fastening element: F > 50 N or according to drawingHolding force of metal clips on the part for which they are used to fasten :F > 80 N or according to the specificationFor pressed-in holders:F > 50 N or according to the specificationFor metal clips on plastic:F > 170 N or according to the specification