Reviewed By James R (Cranberry Township, PA) Reviewed for a 2007 Mercedes-Benz GL-Class —5/15/2007 6:42 AM
I use these air filters in all my vehicles and expect gains in mileage and performance. My new GL450 was delivering the expected 17-18 MPH on the highway. After the initial breakin mileage I purchased the K&N filters which resulted in highway MPH at 20-21. I haven't determined any performance improvement at this point as I'm determined to improve the MPH due to the artifically high price of fuel. The product is delivering the manufacturers claim.