how does your air work?
Thread Starter
Senior Member
Joined: Sep 2007
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2007 S 600 / '06 911 Porsche C4S cab
how does your air work?
On the W220's there was an air filter button that you hit when you get behind a diesel bus or when there were bad smells. I understood that you had to change the filter once a year or so.
On the new S's there is no such button. But if we go through a smelly area or get behind a diesel bus, you can really smell it and there is no filtration like there was on the older models. What's up with that??
On the new S's there is no such button. But if we go through a smelly area or get behind a diesel bus, you can really smell it and there is no filtration like there was on the older models. What's up with that??
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From: Europe
223.168 & 213.012 & 906.633 & 214.005
I believe carsnob was after the active charcoal filter button, on older cars one could switch the air flow through a specific filter (the car might have done it automatically too with a sensor) but this is replaced with a combination filter these days. The air now always flows through an active charcoal filter but the filter isn't as strong as the specific one used to be.
Thread Starter
Senior Member
Joined: Sep 2007
Posts: 330
Likes: 2
2007 S 600 / '06 911 Porsche C4S cab
thanks Diesel Benz. I guess that filter's not as strong as the old one since you never used to be able to smell a diesel bus when you were behind one.
Oh well, I'll still take the improvements overall in the new model...
Oh well, I'll still take the improvements overall in the new model...
MBWorld Fanatic!
Joined: Dec 2006
Posts: 6,501
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From: Europe
223.168 & 213.012 & 906.633 & 214.005
The specific active carbon filters on earlier models (it was on the 4-zone AC W211 too) reduced the air flow quite significantly, the system actually automatically increased the blower speed to compensate that. But the compensation obviously only works at lower fan speeds. This should be the reason the old system did not always use the carbon filters. I guess there is a risk that some dust left from the first filter would clog the carbon filter if all air always passed it.
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From: CA
2010 CL65
Good to see this forum has a bunch of odor elitists....
Have never understood how anyone who is an odor elitist could drive a convertible top-down; drive w/roof or windows open; have any food/drink/pets, etc in car....
Haven't noticed air filtration issues w/newer CLs in CA....and when visiting Manhattan, one is continually assaulted by the nasty odors of Manhattan streets such that one doesn't easily perceive negative air quality in back of a dumpy S550, no matter how much diesel exhaust is present or how bad the driver smells...humans are adaptive creatures....
Have never understood how anyone who is an odor elitist could drive a convertible top-down; drive w/roof or windows open; have any food/drink/pets, etc in car....
Haven't noticed air filtration issues w/newer CLs in CA....and when visiting Manhattan, one is continually assaulted by the nasty odors of Manhattan streets such that one doesn't easily perceive negative air quality in back of a dumpy S550, no matter how much diesel exhaust is present or how bad the driver smells...humans are adaptive creatures....
