yes i read that long time ago
i have a c230 and no unless you do more then just fit filters you are not gaining any thing and to prove it i had this done to my c230 and got it on a rolling road and yes no gain just noise the guy that drifted his car did a lot more then just filters read the whole thread
i have been working on w202 for years and know all the tricks you might think your going faster in your head due to the wine from kompressor but no , UNLESS you get it REMAP-ED