89-02 Mercedes Hydraulic Cylinder Rod & Piston Repair Seals Convertible Top R129 Material NITRILE 70 RUBBER O-RING Basic Instructions and Useful Resources Free Hydraulic Pump Refill Instructions For the DIY Repair of all 11 (12 on some years) Hydraulic Cylinders that raise lower & Lock your Convertible Top Covers Mercedes SL Class....R129 Chassis...1989 - 2002