04-11 Mercedes SLK 280 350 55 AMG R171 Hydraulic Cylinder Roof Repair Kit Material NITRILE 70 RUBBER O-RING.......... ROD Seal Comprehensive Multipage Illustrated Guideline For the DIY Repair of Front Lock Cylinder Covers Mercedes SLK Class....R171 Chassis...2004 - 2011 Tool Kit Included For Removal of Old Seal