I changed theb oil & filter on my C314 LX 04 today used 27mm socket 8mm sump plug tool washer plastic sink basin oil filter oil i jacket up & supported front drivers side , slide a hap or whatever you have under drain plug , rags & basin ready unscrewed plug with 8mmm sq tool, leave to drain , lowered the car to make sure it drained properly put rags around filter housing & with something under filter to catch any oil , unscrew filter cover with 27mm socket & lift clear , pull old filter from cover, replace the rubber seal around the filter cover ( just above threads on outside of cover) push new filter into cover & hand tighten cover onto housing then use 27mm socket to tighten, jack car back up to give some elbow room , replace washer on sump plug , & tighten using 8mm sq tool , i then used 21/2 ltrs of oil , then kept checking oil level ,using in total 31/4 to get to the maximum level job done