Engine Air Filter Change
Thread Starter
Junior Member
Joined: Apr 2016
Posts: 32
Likes: 2
2014 GL450
Engine Air Filter Change
Can someone help with a video or step by step pictures of how to change engine air filter for x166 GL450? The videos on youtube are all for x164 and it appears the two are not the same, it is more complex for X166.
Thanks a lot,
Thanks a lot,
Junior Member
Joined: May 2011
Posts: 18
Likes: 0
From: NYC
2014 GL450
Try this video, I change my air filter on my 2014 GL450 X166 after watch the video, The set up are the same, just be-careful on the right side (driver side) box, the is a vacuum outlet has a metal clap on it, I have to break it and replace a with a metal hose clap from home depot.
Thread Starter
Junior Member
Joined: Apr 2016
Posts: 32
Likes: 2
2014 GL450
Air Filter Change
Thanks iisnoopyii. The video is really helpful.
Successfully completed the air filter change today. Mercedes tried really hard to make this so difficult, but came out victorious.
A tip, when removing the right side filter housing remember to remove the oxygen sensor by pressing the black ring and pulling out the sensor from the fitting. It is really important so that you don't break the sensor. The housing does not come out loose and you have to invert the housing, unscrew and change the filter. see attached pic of the sensor.
For the left side filter housing, the above video provides a great explanation of removing the sensor, by twisting and pulling out painlessly.
Another piece of advice, if doing for the first time, start with the passenger side and then move on to the driver side. Mercedes rebrands MANN filters C3397.
Successfully completed the air filter change today. Mercedes tried really hard to make this so difficult, but came out victorious.
A tip, when removing the right side filter housing remember to remove the oxygen sensor by pressing the black ring and pulling out the sensor from the fitting. It is really important so that you don't break the sensor. The housing does not come out loose and you have to invert the housing, unscrew and change the filter. see attached pic of the sensor.
For the left side filter housing, the above video provides a great explanation of removing the sensor, by twisting and pulling out painlessly.
Another piece of advice, if doing for the first time, start with the passenger side and then move on to the driver side. Mercedes rebrands MANN filters C3397.
Last edited by djay; Apr 23, 2017 at 11:07 PM.
Member
Joined: Apr 2016
Posts: 142
Likes: 23
2013 GL350
I have, and I am a novice. The instructions are pretty much the same and I used them as a guide. I'll pop the hood and try to remember if I had to do anything else. I do remember removing the crossbars to be able to lift then housing out, but I dont recall having any difficulties with clamps or connectors.
Super Member
Joined: Feb 2017
Posts: 506
Likes: 54
GL350 Bluetec and GLS580
The video looks quite different than what I see under the hood. It seems I may need to pick up a 1/4" swivel adapter though.
I have, and I am a novice. The instructions are pretty much the same and I used them as a guide. I'll pop the hood and try to remember if I had to do anything else. I do remember removing the crossbars to be able to lift then housing out, but I dont recall having any difficulties with clamps or connectors.
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Joined: Feb 2016
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From: America's Mitten
on GLC300 #2, a 2022 CPO purchased b/c I really dislike the X254's UI (GL350 before those)
Sources:
ALL AMAZON
MB of Warwick for Engine Air Filters, MB OEM 642 094 00 00 set (pair) $92
Mahle LAK 878/S pair of HVAC cabin air filters (inner) carbon activated thick filters $36.12
Mann CU25-002 Cabin Air Filter (single), the thinner particle or screen filter thing $17.35
ALL AMAZON
MB of Warwick for Engine Air Filters, MB OEM 642 094 00 00 set (pair) $92
Mahle LAK 878/S pair of HVAC cabin air filters (inner) carbon activated thick filters $36.12
Mann CU25-002 Cabin Air Filter (single), the thinner particle or screen filter thing $17.35
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Super Member
Joined: Feb 2017
Posts: 506
Likes: 54
GL350 Bluetec and GLS580
I just finished replacing my engine air intake filters. It is a pretty simple job even in 90+ degree heat. However, I did find that my "raw air line" hose on the passenger side was falling apart/ripped. Searching now for a replacement. Part #6420946897
Last edited by DC-BENZ; Jul 14, 2017 at 05:07 PM.
Newbie
Joined: Jun 2017
Posts: 7
Likes: 3
2014 GL 450
Thanks iisnoopyii. The video is really helpful.
Successfully completed the air filter change today. Mercedes tried really hard to make this so difficult, but came out victorious.
A tip, when removing the right side filter housing remember to remove the oxygen sensor by pressing the black ring and pulling out the sensor from the fitting. It is really important so that you don't break the sensor. The housing does not come out loose and you have to invert the housing, unscrew and change the filter. see attached pic of the sensor.
For the left side filter housing, the above video provides a great explanation of removing the sensor, by twisting and pulling out painlessly.
Another piece of advice, if doing for the first time, start with the passenger side and then move on to the driver side. Mercedes rebrands MANN filters C3397.
Successfully completed the air filter change today. Mercedes tried really hard to make this so difficult, but came out victorious.
A tip, when removing the right side filter housing remember to remove the oxygen sensor by pressing the black ring and pulling out the sensor from the fitting. It is really important so that you don't break the sensor. The housing does not come out loose and you have to invert the housing, unscrew and change the filter. see attached pic of the sensor.
For the left side filter housing, the above video provides a great explanation of removing the sensor, by twisting and pulling out painlessly.
Another piece of advice, if doing for the first time, start with the passenger side and then move on to the driver side. Mercedes rebrands MANN filters C3397.
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Senior Member
Joined: Aug 2016
Posts: 262
Likes: 30
2014 GL450
Thanks iisnoopyii. The video is really helpful.
Successfully completed the air filter change today. Mercedes tried really hard to make this so difficult, but came out victorious.
A tip, when removing the right side filter housing remember to remove the oxygen sensor by pressing the black ring and pulling out the sensor from the fitting. It is really important so that you don't break the sensor. The housing does not come out loose and you have to invert the housing, unscrew and change the filter. see attached pic of the sensor.
For the left side filter housing, the above video provides a great explanation of removing the sensor, by twisting and pulling out painlessly.
Another piece of advice, if doing for the first time, start with the passenger side and then move on to the driver side. Mercedes rebrands MANN filters C3397.
Successfully completed the air filter change today. Mercedes tried really hard to make this so difficult, but came out victorious.
A tip, when removing the right side filter housing remember to remove the oxygen sensor by pressing the black ring and pulling out the sensor from the fitting. It is really important so that you don't break the sensor. The housing does not come out loose and you have to invert the housing, unscrew and change the filter. see attached pic of the sensor.
For the left side filter housing, the above video provides a great explanation of removing the sensor, by twisting and pulling out painlessly.
Another piece of advice, if doing for the first time, start with the passenger side and then move on to the driver side. Mercedes rebrands MANN filters C3397.
