W212 E350: AMG Sport/P2/Pano/Etc. & '09 Chevy Malibu / Sold M-B's: '06 E350 & '02 S500
Thinking of tossing a K&N Air Filter(s?) in the car, was wondering if anyone's had this done and if so, any improvements in anything or is it just a pointless mod. I had 'em on my last cars, and the main improvement was not having to ever have it replaced. Not sure if MB makes a good Air Filter from the Factory though.