... 3.Type:GAS 4.Passed ISO9001:2008 5.Weight://kg Front shock absorber- 221 320 49 13 for Mercedes Benz .1.product ... description: 1.NAME:front shock absorber- 221 320 49 13 for W221.2.OEM: 221 ... the first place,which decides the durable period for the shock absorbers.4.To ensure machining dimension precision,surface roughness& other profile ...