96-04 Mercedes SLK 230 Convertible Top Hydraulic Cylinder Repair Kit R170 Material NITRILE 70 RUBBER O-RING......... ROD Seals O-Rings Only Free Hydraulic Pump Refill Instructions For the DIY Repair of all 5 Hydraulic Cylinders that raise lower & Lock your Convertible Top Vario Roof Covers Mercedes SLK Class....R170 Chassis...1996 - 2004