1,piston ring,Benz piston ring,OM617 OM616 Benz piston ring 2.Management:ISO9002,TS/16949 3,Material:Alloy steel ... 4OM621180D,190D,406D,200D,319D,405D8742+2+2+5M115200, 2208741.75+2.5+4OM603 OM601 D30190D, 200D 250D, 300D8742+2+ ... +3OM615DB200D ,220D,Unimog8743+2+4Motor1.71190E 1.887.541.75+2+3.5Motor M116V8380SE,380SEL,380SEC,380SL88V81.5+2+3 ... +3+3+5.5+5.5 Mercedes-Benz piston ring for OM616 M111 M161