Why? So hope the K&N are water proof? Ha Ha I've been told not to shorten them could change the Mass Air tune. I don't think this car has been turned by eurocharge since 2011?? I'm lost on where to go. Can a Mercedes-Benz dealer tune this car?

 

No way Jose, but it would provide him a good laugh.

 

The air is colder in the nose of the vehicle than in the middle of the engine bay where the stock filters are, thats why. No the filters are not waterproof but it's damn near impossible to suck up water into the engine with that cai unless the vehicle is submerged up to the hood or a vehicle flashes a tidal wave of water over the hood of the car for a long amount of time. Ive never heard of anybody with the needswings cai hydro locking their motor. Lastly if you are concerned about water, just put a prefilter on the k & n filter. Issue solved.

 

I doubt that the stock filters increase in temperature very much above ambient temperature with the ambient air going through them. If the car sit while hot then heat soak will heat them up pretty quick. But will cool down when they get ambient air running through them again depending on the air speed through them.