e320 2003 200,000 + miles. Great mpg 32 highway 28 around town. Had valve cover gasket replaced. MPG now off by 3 to 4 miles per gallon? Any input? Thanks

Asked by Jul 16, 2013 at 05:03 PM about the 2003 Mercedes-Benz E-Class E320

Question type: Maintenance & Repair

1 Answer

Does the PCV valve go in to the valve cover on your car? If so, in changing the covers the PCV valve may have been improperly reconnected, resulting in a vacuum leak and cause precisely what you describe

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