This is for the SEALS ONLY... PLUS A DETAILED SEAL CYLINDER MATCH CHART, TO ENABLE YOU TO IDENTIFY THE CORRECT SEAL TO REPAIR EACH CYLINDER for the rebuild of the hydraulic cylinders that raise, lower, and lock your retractable roof This comprehensive set of 20 O-rings is what you need to rebuild all 11 (or 12, depending on year) of your car roof's hydraulic cylinders. Because of changes made by Mercedes during the R129 chassis' run, We have included all the possible combinations of o-rings needed--regardless of year or model. This is an upgrade to the OEM seal, which is not capable of withstanding the aggressive/corrosive hydraulic fluids. Fits the following vehicles built on the Mercedes SL Class Convertible R129 chassis: 300SL1989 - 1993 300SL-241990 - 1993 500SL1990 - 1993 600SL1993 - 1993 SL2801993 - 2000 SL320 1994 - 2002 SL500 1994 - 2002 SL600 1994 - 2002 For repair of Mercedes Benz part numbers: 129 800 0272 / 129 800 02 72 / 1298000272 (Main top drive actuators) 129 800 1672 / 129 800 16 72 / 1298001672 (Windshield top lock actuators) 129 800 2172 / 129 800 21 72 / 1298002172 (Rear top lock actuators) 129 800 2072 / 129 800 20 72 / 1298002072 (Tonneau actuators) 129 800 0072 / 129 800 00 72 / 1298000072 (Rear top lock actuators / tonneau lock actuators on some years) 129 800 1772 / 129 800 17 72 / 1298001772 (Left top-folding actuators) 129 800 1872 / 129 800 18 72 / 1298001872 (Right top-folding actuators) NOTE: THE SEALS IN THIS KIT ARE O-RING SEALS. Additional Details ------------------------------ Package quantity: 1