Change that cabin air filter - Mercedes-Benz Forum
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post #1 of 11 (permalink) Old 06-24-2019, 05:57 AM Thread Starter
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Change that cabin air filter

I just changed my cabin air filter. I had not done it in 4 years. BIG MISTAKE. The filter I pulled out was totally clogged. And lots of leaves, twigs, and assorted crap fell out as well. This is a big deal. No sooner the new filter in, and my air conditioning is working much better. I now get the same volume of air with the fan setting at one or two stops versus 3 or 4 previously. Personally I find doing the change a PIA, but if you manage to get the clips back on easily, then the job is an easy one. I seem to have trouble with the white plastic clips. Your results may vary, but the benefit of changing the filter is instantaneous. Will change every two years now for sure!! Mark it in your phone's agenda. I chose the filter with activated charcoal. AutohausAZ has three choices. Your really should do it.
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1996 C280 and 2010 E350 4-Matic
Previous: 2003 C320 Sport 4-matic
1994 C-180
1959 220S
1952 300 (Four door Sedan - Adenauer)
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post #2 of 11 (permalink) Old 06-24-2019, 12:20 PM
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I hate to confess this, but I owned my car for almost eight years before I even realized it had one. My car was so bad I was getting hardly any air out of the vents at all, and the fan was making noise. I assumed that my squirrel cage had broke, ordered a new one, and proceeded to install it, then discovered the damn filter. Now I change it once every two years whether it needs it or not. It will also help the fan resistor live longer because it helps circulate more air over it.
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post #3 of 11 (permalink) Old 06-25-2019, 02:04 PM
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I change it with the engine air filter. Depends how dirty your environment is really. Mine is a city car so it doesn't get that fouled.
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post #4 of 11 (permalink) Old 06-28-2019, 05:41 AM
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Quote:
Originally Posted by georgebuhr View Post
I hate to confess this, but I owned my car for almost eight years before I even realized it had one. My car was so bad I was getting hardly any air out of the vents at all, and the fan was making noise. I assumed that my squirrel cage had broke, ordered a new one, and proceeded to install it, then discovered the damn filter. Now I change it once every two years whether it needs it or not. It will also help the fan resistor live longer because it helps circulate more air over it.
That's pretty funny I gotta admit

The W140 (and the dual zone W210s) have an extra smog filter which can be enabled at the touch of a button on the CCU. I believe it's just a proper activated charcoal filter (our W202 filters only have some activated charcoal sprinkled on the filer).
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post #5 of 11 (permalink) Old 07-04-2019, 05:06 AM
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I changed the cabin air filter together with the intake air filter and the biggest problem I found was to put back the black cover under the dashboard, some asshole mechanic apparently inserted it wrong the previous time and the pin that needs to be inserted was curved.
I think it took like half hour just to put the cover back.

Another thing: when changing the cabin air filter, there is another small compartment near the one of the filter, that's also closed by some small clips and when I opened it it was full of leaves and shit that I had to clean, but still I have no idea what's that compartment used for.

Anyway here I show you how the filter looked like:
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post #6 of 11 (permalink) Old 07-04-2019, 07:55 AM
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Pretty dirty but you may have had a charcoal filter.

I would recommend buying the ones with the rigid plastic frame.

Last edited by MB-W202; 07-04-2019 at 08:07 AM.
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post #7 of 11 (permalink) Old 07-15-2019, 11:24 AM
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Hi MB-W202 and All,
Who makes cabin filters with rigid plastic frame and where can I buy 'em?
The original that came out of my 20 year old car is made by Valeo micronAir Carbon Activated for Mercedes. Looks very well made and looks pretty clean. Tapped it thoroughly and hard, checked all the folds, only a teaspoon of black fine dust came out, and a couple of tiny dried leaves - unless there are still micro dust particles that are stuck to the filter element over the years. I have no trouble whatsoever with it, cooling, air noise, and everything is just the way it was on day one when I bought the car new on Sep 1, 1999! Yes, did not use the climate control at all (no A/C, no ventilation, no air, not even for defogging) from June 2011 until June 2019.
I have seen MANN CU 2897 (very lightweight), CUK 2897 (carbon activated, but still very lightweight, no rigid plastic frame), and then the FP 2897 (carbon activated, plus biofunctional filter for allergene, bacteria, mould fungi protection), about same weight as the carbon activated and no rigid plastic frame. The paper frames in all are pretty flimsy, which makes me wonder if they will ever come apart and start making noise??
Attached are pics of my original.
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post #8 of 11 (permalink) Old 07-16-2019, 10:15 AM
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Have always used Mann. No issues.
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post #9 of 11 (permalink) Old 07-18-2019, 06:08 PM
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Thanks khomer2! Which one do you use - the non carbon, carbon or the biofunc? And what tells you its time to change?
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post #10 of 11 (permalink) Old 07-18-2019, 06:37 PM
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Quote:
Originally Posted by sgoesbwo View Post
Thanks khomer2! Which one do you use - the non carbon, carbon or the biofunc? And what tells you its time to change?
I prefer carbon. Check it annually and change as required. We dont have any real issues of leaves or debris, bugs etc, based on our driving style. It's not a daily commuter.
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