You should have the piece that looks like a radiator cap.If not, you will have to get one and I would think they would cost more than the $15.50 for the star kit.Is the star you have in one piece? If so, then you have the wrong star.You may have the star with the part number 201 880 00 86. If your car is a 114/115 chassis, it takes the star repair kit no. 115 586 04 88 and does consist of about four pieces.Good luck and keep us posted.
Bill Lewallen Lex.Ky.