This comprehensive kit is what you need to undertake the job from start to finish. Inlcudes: O-ring to rebuild the Vario Roof FRONT LOCK CYLINDER.....ROD SEAL A very useful Pick Tool, for removing the old worn seals. Hydraulic oil pump refill kit...for replacing lost fluid after you complete the installation in a clean very easy way 1 Liter of ZH-M......, 000 989 91 03 10.....Hydraulic Oil Installation instructions, guidelines links to online useful resources for every portion of the job Free Shipping This is an upgrade to the OEM seal, which is not capable of withstanding the aggressive/corrosive hydraulic fluids. The Nitrile Rubber compound used in this seal is exceptionally resistant to petroleum based oils, found in hydraulic fluids used in the Mercedes Benz convertible top hydraulic system. For Use With The Following Vehicles SL350, SL500, SL550, SL600, SL55 AMG, SL63 AMG SL65 AMG For repair of Mercedes Benz part numbers: FRONT LOCK CYLINDER 2308000872 Please note returns are not accepted on opened bottles of oil...The cap seal must still be intact and not tampered with for a return to be accepted 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