Genuine spark plugs that were installed on a Mercedes-Benz w218 cls350. This is a set of 6. They were removed for preventative maintenance. Operation has been confirmed. They were taken from a vehicle with 80,500 kilometers. I believe they can still be used. (Please check the condition in the photos.) I believe they can be used in V6 engines (M276) etc., but please confirm compatibility yourself. Set of 6 - Stamped number: Z6S113320R Please be sure to check the actual product before purchasing.