Quarter turn clip, expanded polypropylene vehicle panel and vehicle metal sheet plate assembly wherein the quarter turn clip is configured for connecting the vehicle metal sheet plate and the expanded polypropylene vehicle panel , wherein the vehicle metal sheet plate comprises a thickness e 1 and a non-circular mounting hole (12.1) having two parallel sides (12.1.1), a width w 1 and a length l 1 , wherein the expanded polypropylene vehicle panel comprises a cylindrical mounting hole (11.1) with a diameter d 3 and a height e 2 , wherein said quarter turn clip is configured to adopt a final mounting position in which the quarter turn clip connects the expanded polypropylene vehicle panel with the vehicle metal sheet plate , and wherein said quarter turn clip comprises: • a main axle z, • a retention wing having a length d 1 , • a cylindrical body connected to the retention wing through a first plane p 1 orthogonal to the main axle z, wherein the cylindrical body has a diameter d 2 smaller than d 1 , • a neck connected to the cylindrical body , • an attaching head insertable through the non-circular mounting hole (12.1) of the vehicle metal sheet plate and connected to the neck , wherein said attaching head has a main body (5.1) which comprises a width w 2 smaller than the width w 1 and a length l 2 smaller than the length l 1 and two tension ramps wherein each of them comprises a final mounting edge (6.2) in a second plane p 2 orthogonal to the main axle z and parallel to the plane p 1 , and a starting mounting edge (6.1) in a third plane p 3 orthogonal to the main axle z and parallel to the plane p 1 , wherein the cylindrical mounting hole (11.1) is configured to house the cylindrical body of the quarter turn clip , and wherein in the final mounting position one side of the vehicle metal sheet plate is in contact with the expanded polypropylene vehicle panel and the opposite side of the vehicle metal sheet plate is in contact with the final mounting edges (6.2) of the tension ramps , characterized in that ,the cylindrical body has a diameter d 2 bigger than d 3 in such a way that when the cylindrical body is inside the cylindrical mounting hole, they elastically fit together, wherein the distance h 1 between the first plane p 1 and the second plane p 2 is smaller than the sum of the thickness e 1 and the height e2, and in that in the final mounting position the expanded polypropylene vehicle panel is compressed in such a way that the cylindrical mounting hole (11.1) has a height e 3 smaller than the height e 2 due the compression exerted by the quarter turn clip . • a main axle z, • a retention wing having a length d 1 , • a cylindrical body connected to the retention wing through a first plane p 1 orthogonal to the main axle z, wherein the cylindrical body has a diameter d 2 smaller than d 1 , • a neck connected to the cylindrical body , • an attaching head insertable through the non-circular mounting hole (12.1) of the vehicle metal sheet plate and connected to the neck , wherein said attaching head has a main body (5.1) which comprises a width w 2 smaller than the width w 1 and a length l 2 smaller than the length l 1 and two tension ramps wherein each of them comprises a final mounting edge (6.2) in a second plane p 2 orthogonal to the main axle z and parallel to the plane p 1 , and a starting mounting edge (6.1) in a third plane p 3 orthogonal to the main axle z and parallel to the plane p 1 , <EOS>