A fastener for an inner panel of a motor vehicle has a proximal fastening foot for connection to the inner panel and a distal retaining clip for the captive fastening in a retaining opening of a vehicle body reinforcement. A retaining ramp, which is movable in the direction of an opening plane of the retaining opening of the vehicle body reinforcement, is provided between the proximal fastening foot and the distal retaining clip to retain the fastener in the retaining opening. It is thus possible to pull the fastener as a whole somewhat out of the retaining opening, in order to form an opening space for unfolding an airbag between the inner panel and the vehicle body reinforcement.