an elongated moulding made from rubber , plastic , etc . is cross - sectionally provided with a leg for arrangement between a mud flap and the fender fold of a motor vehicle , and which mud flap has a main flap body and an adapting protrusion connected to the top thereof . a widened material portion is connected to the leg . the leg , which is to be arranged between the mud flap and the fender fold , has notches extending from the free longitudinal edges to the transition area with the widened material portion , and these notches extend at right angles to the free longitudinal edge . in the fitted state , the widened material portion engages on the vehicle body area adjacent to the fender fold .