94-02 Mercedes SL500 Hydraulic Cylinder Rod Repair Seals for Convertible Top...R129 Material NITRILE 70 RUBBER O-RING......... ROD Seals 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