This product is an OEM crankcase PCV valve for the 3.5L V6 engine found in 2012-2016 Mercedes-Benz W204 C350 and W212 E350 models. The manufacturer part number is 2760100331 / A2760100331 / A 276 010 03 31, and it comes with a 90-day warranty. It was made in Germany and is interchangeable with part numbers 12 13 14 15 16 2012 2013 2014 2015 2016 and OEM.