Crimzon

Was changing my air intake filters and noticed that there are another set of filters below those .. Didn't think of takin pictures ... Anyone have an idea if what those are for

stgry1

Really? Are you sure they aren't just mesh screens for catching large debris that might get by the paper filters?

Funkwagen

US w204s have an unexplained secondary filter which I think is charcoal or something, possibly for emissions. I don't think it needs changing, and I think it can even be safely removed

edgalang

https://mbworld.org/forums/c-class-w...-filter-s.html

Crimzon

I will take pictures to show what I'm talking bout but that's about rite ... They look like charcoal filters

Crimzon

Dual intake

Crimzon

Bottom/small filter

edgalang

When I discovered mine, did a google search on "charcoal delete", and found that this is NOT just a Mercedes topic, but with all manufacturers makes and models (at least in the US). It is purely for emissions and prevents unwanted fumes from escaping the intake when you shutdown/startup the car.

Crimzon

Aahhh .... That's for the quick responses

Richard2011

My car doesn't have those secondary filters.

Crimzon

Not sure if it makes a difference but it was imported from Germany

edgalang

I doubt it does, regardless, all W204's are imported, either from Germany or South Africa. Only W205s are assembled in America.

Crimzon

O ok ... Did not know that .. Thanx

PolarWhite2014

Mine was made in South Africa I believe and doesn't have the charcoal filter deelie thing. I've searched and from what I've gathered it appears to be a California emissions thing. My car was shipped from the factory to KS for it's first owner. I'm guessing the one's going to Cali and other states with stringent emissions standards get this lovely little upgrade. Anyone who's car initially came from California fell free to chime in

Dynotrick

My car came from South Africa and was initially sold in Arizona - no extra filters in the intake system...