This sale is for Both the ROD PISTON CAP SEALS to rebuild the hydraulic cylinders that raise, lower, and lock your retractable roof, with instructions. PLUS Free Hydraulic Pump Refill Instructions This comprehensive set of 30 plus 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. The Kit Includes both the ROD PISTON O-ring Seals The O-rings in the kit are organized by cylinder, so you know which ones go to which cylinders. This is an upgrade to the OEM seals, which are not capable of withstanding the aggressive/corrosive hydraulic fluids. The Nitrile Rubber compound used in the seal is exceptionally resistant to petroleum based oils, found in hydraulic fluids used in the Mercedes Benz convertible top hydraulic system. Fits the following vehicles built on the Mercedes R129 chassis: MODEL FROM TO 300SL 1989 1993 300SL-24 1990 1993 500SL 1990 1993 600SL 1993 1993 SL280 1993 2000 SL320 1994 2002 SL500 1994 2002 SL600 1994 2002 A set of basic instructions and links to online resources are included. 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) PLEASE READ This hydraulic cylinder repair kit is not sponsored or endorsed by Mercedes Benz in any way. The kit is and aftermarket product designed and produced by Wesbaun Consultants Inc to repair the failed, leaking Mercedes Hydraulic Cylinders that Raise, lower Lock the convertible roof into position. The kit includes seals which are a direct replacement for the failed urethane oem u cup ROD seals Mercedes will tell you the cylinders cannot be rebuilt and will want to sell you a completely new cylinder costing $$$$. All hydraulic cylinders in vehicles or machinery you come across can be rebuilt. That?s why there are many companies out there that manufacture replacement seals. If you are competent with the use of basic hand tools this kit is a DIY project for you and will save you $$$$ We will not be found responsible for misuse, misinterpretation and poor workmanship when installing the seals. Correct installation is responsibility of the Buyer, we are not responsible for the outcome of installations performed by third party installers like your mechanic. If you do use a mechanic please ensure he has carried out this installation procedure competently before Shipping Alert Currently the United State Postal Service are experiencing delays with some mail deliveries, due to the current environmental situation, office closures, volume of mail and lack of transportation. Mainly associated with but not limited to First Class They have indicated to us that in some cases it's taking a minimum of 10 business days Please note if your package is delayed, which can be seen from the tracking number we provide, please be patient as it's not our fault. Also, we advise you to use the tracking system on the USPS website as it's more accurate and up to date. Please Read In an effort to enhance the customers experience and to help further with the installation, we have adopted the following We used to print out the installation guidelines, however in some instances we received constructive feedback from the buyer asking us to email the original document as the printed versions, in some cases were dark and grainy which made it hard to follow. The files are actually too big to email and in most cases get bounced back undelivered by the recipients email server, therefor when you receive your order you will see a link via a QR code and also a web link version of the QR code that will take you to a crisp clear and in most cases color version of the guideline