I didn't think this car had a PCV valve, but I came across this ad for a Crankcase Vent Valve:

http://www.*********.com/gbproducts/YN/D6326-OES-B2017.html?utm_source=google&utm_medium=ff&utm_term=99+1999+Mercedes+C230+Crankcase+Vent+Valve+OES+Genuine+Mercedes+Crankcase+Vent+Valve+202.02 4+111.975&utm_content=YN&utm_campaign=*********+Google+Base

I would like to replace it...but I don't see it anywhere. Does anyone know where it's located? Thanks,

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2008 ML350
2007 Honda Element
2007 Honda Accord
2009 Honda Civic