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Secondary air filter
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Posted 4/22/2019 11:53 AM
sdw96
Regular




Date registered: Mar 2012
Location: MA, USA
Vehicle(s): ‘15 G63, ‘19 BMW X7, 98 M3, 89 Grand Wagoneer
Posts: 76
50
Secondary air filter

Question, doing some annual maintenance and changing the air filters. It appears that there is a second air filter above each main filter. It is built into the intake housing. Can’t figure out how to get them out or if I should. Any guidance would be appreciated. Thanks
#240621
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Author
Posted 4/23/2019 10:50 AM
sdw96
Regular




Date registered: Mar 2012
Location: MA, USA
Vehicle(s): ‘15 G63, ‘19 BMW X7, 98 M3, 89 Grand Wagoneer
Posts: 76
50
RE: Secondary air filter

Maybe a picture would help.



(IMG_7409.jpg)



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#240622 - in reply to #240621
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Author
Posted 4/23/2019 2:55 PM
AlanMcR
Expert




Date registered: Apr 2006
Location: US, CA, Los Altos
Vehicle(s): G300DT E300DT 230SL
Posts: 3500
2000
RE: Secondary air filter

No idea.  It isn't shown as a separate part:

https://mercedes.7zap.com/en/eu/fg/suv/g+500/g+500/62u/463249/m/113962/07n/09/0/015/0/0/

#240623 - in reply to #240621
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Posted 4/23/2019 3:32 PM
sdw96
Regular




Date registered: Mar 2012
Location: MA, USA
Vehicle(s): ‘15 G63, ‘19 BMW X7, 98 M3, 89 Grand Wagoneer
Posts: 76
50
Re: Secondary air filter

It’s on both sides too. I assume everyone has one. I can’t be the first one to have noticed it.
#240624 - in reply to #240621
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Posted 4/24/2019 9:21 AM
paulunm
Veteran


Date registered: Jan 2015
Location: Los Angeles
Vehicle(s): 2000 G500
Posts: 124
100
Re: Secondary air filter

Looks like a secondary carbon filter for emissions. I've heard of these on other vehicles, but didn't know the later G500 has them.

I don't have them on my early G500.
#240625 - in reply to #240621
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Posted 4/24/2019 9:30 AM
sdw96
Regular




Date registered: Mar 2012
Location: MA, USA
Vehicle(s): ‘15 G63, ‘19 BMW X7, 98 M3, 89 Grand Wagoneer
Posts: 76
50
Re: Secondary air filter

Yes it definitely looks like a carbon filter, it looks rather dirty to me too, must be awfully restrictive on airflow to have double filters on it.

Dutch, you have a thought on this?
#240626 - in reply to #240621
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Posted 4/24/2019 3:38 PM
DUTCH
Administrator Doppelgänger




Date registered: Apr 2006
Location: US, GA, Atlanta
Vehicle(s): 2015 Audi Q7 3.0 TDI,2018 Sprinter
Posts: 9963
5000
Re: Secondary air filter

sdw96 - 4/24/2019 9:30 AM

Dutch, you have a thought on this?


None. If you want to PM your VIN to me, I can look it up on the EPC to see if it is listed and what it is called.
#240627 - in reply to #240626
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Posted 4/25/2019 5:35 AM
DUTCH
Administrator Doppelgänger




Date registered: Apr 2006
Location: US, GA, Atlanta
Vehicle(s): 2015 Audi Q7 3.0 TDI,2018 Sprinter
Posts: 9963
5000
Re: Secondary air filter

DUTCH - 4/24/2019 3:38 PM

sdw96 - 4/24/2019 9:30 AM

Dutch, you have a thought on this?


None. If you want to PM your VIN to me, I can look it up on the EPC to see if it is listed and what it is called.


No secondary filter shows up on the EPC.

Parts diagram sent to aol.com email address.
#240631 - in reply to #240627
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Posted 4/25/2019 8:12 AM
sdw96
Regular




Date registered: Mar 2012
Location: MA, USA
Vehicle(s): ‘15 G63, ‘19 BMW X7, 98 M3, 89 Grand Wagoneer
Posts: 76
50
Re: Secondary air filter

Thanks for looking up and sending Dutch. Appears this one will remain a mystery.
#240633 - in reply to #240621
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Posted 5/3/2019 12:28 AM
Otiswesty
Administrator




Date registered: Jun 2007
Location: Portland, Oregon
Vehicle(s): 463.241, 461.213
Posts: 3002
2000
Re: Secondary air filter

It may be a replacement unit from a sedan 113 motor. Check the part number on the housing.

Sometimes these get replaced because the plastic retainer tabs and bits break off underneath. I swapped mine out for that reason with an eBay unit.

Edited by otiswesty 5/3/2019 12:28 AM
#240643 - in reply to #240621
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