Mounting for a motor vehicle add-on component for being mounted on a motor vehicle body part which is provided with a receiving opening and has a first face and a face opposite said first face, - the mounting comprises two support elements (11, 12), which can be assigned to the opposing faces (33, 34) of the body part, and a clamping device, - the first support element can be assigned to one face of the body part, the first support element comprising a plurality of support arms that are mounted so as to be able to rotate with respect to one another about an axis of rotation, and therefore, the support arms can pass the receiving opening in a first angular position, in which they are rotated towards one another, and cannot pass the receiving opening again in a second angular position, in which they are rotated away from one another, - the second support element is assigned to the opposite face of the body part, the second support element comprising at least one bearing surface (4, 25) via which said second support element can contact the face of the body part assigned thereto, - the two support elements (11, 12) can be clamped to one another by means of the clamping device in order to clamp regions of the body part between the at least one bearing surface (4, 25) of the second support element and the support surfaces formed on the first support element, characterised by the following features: - the axis of rotation is oriented in parallel with the clamping device of the two support elements (11, 12), and - the support arms of the first support element each comprise two support surfaces which are arranged so as to be opposite one another with respect to the axis of rotation and are supported against an edge region of the receiving opening in the second angular position. - the mounting comprises two support elements (11, 12), which can be assigned to the opposing faces (33, 34) of the body part, and a clamping device, - the first support element can be assigned to one face of the body part, the first support element comprising a plurality of support arms that are mounted so as to be able to rotate with respect to one another about an axis of rotation, and therefore, the support arms can pass the receiving opening in a first angular position, in which they are rotated towards one another, and cannot pass the receiving opening again in a second angular position, in which they are rotated away from one another, - the second support element is assigned to the opposite face of the body part, the second support element comprising at least one bearing surface (4, 25) via which said second support element can contact the face of the body part assigned thereto, - the two support elements (11, 12) can be clamped to one another by means of the clamping device in order to clamp regions of the body part between the at least one bearing surface (4, 25) of the second support element and the support surfaces formed on the first support element, - the axis of rotation is oriented in parallel with the clamping device of the two support elements (11, 12), and - the support arms of the first support element each comprise two support surfaces which are arranged so as to be opposite one another with respect to the axis of rotation and are supported against an edge region of the receiving opening in the second angular position.