MAF Sensor Cleaning
Super Member
Joined: Nov 2007
Posts: 655
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I drive the racism out of BadDebt. ;)
I believe the MAF is in the same position as all other CLKs???
remove airbox, top center of motor. remove clip and plug...then pull up and out. voila.
use MAF cleaner to clean it... spray it, then allow to dry. repeat. then reinstall. You *may* get a CEL and a rough idel for a few minutes as it trys to reconfigure....the CEL will go away.
remove airbox, top center of motor. remove clip and plug...then pull up and out. voila.
use MAF cleaner to clean it... spray it, then allow to dry. repeat. then reinstall. You *may* get a CEL and a rough idel for a few minutes as it trys to reconfigure....the CEL will go away.
Senior Member
Joined: Jul 2007
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From: Slovakia
09C63AMG, 03E320
Here you go, if you have searched a bit, i am sure you would have found it. 
https://mbworld.org/forums/clk-class...ts-idling.html
https://mbworld.org/forums/clk-class...ts-idling.html
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Joined: Dec 2010
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2008 CLK550 Cab
You use MAF sensor cleaner. The MAF is easy to find, but it can be hard to remove. Just figuring out how the connector unclips can be a chore in a tight space. You can actually clean it in place, although if yours is really oily then removing it may be best since you'll need to use more spray. The spray evaporates so fast that as long as you leave your air cleaner off and don't try to start it for a while you'll be fine. Like others said, at first you may think you just ruined your car. It will idle rough, may not rev above idle, may blow some smoke and may throw a CEL. Let it run a minute like that then turn it off and back on and it should be good as new.
Newbie
Joined: Jun 2013
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CLK350
Interesting, I should definitely take a look at cleaning my MAF sensor then since mine started idle shaking today. I recently had its oil changed and what not but the service B message came on and the car is only at 46K miles.
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MBWorld Fanatic!
Joined: Oct 2012
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CLK55 W209, CL63 W216
45k miles and I decided to clean it. It was pretty much clean. I left it in place as you can get a clear view of the sensor without removing the entire assembly. Just let the spray evaporate before you start the car. It will hick up a couple of times if you don't...either way it will be fine.
This nonsense about damaging sensors by cleaning them is just that nonsense...well provided you use MAF sensor cleaner. If you spray brake cleaner on it the results might be different.
This nonsense about damaging sensors by cleaning them is just that nonsense...well provided you use MAF sensor cleaner. If you spray brake cleaner on it the results might be different.
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Joined: Jan 2004
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2004 CLK320
In this aspect, the dealerships are better. If the clips break, they will have other ones in stock.
Newbie
Joined: Mar 2014
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CLK350
CLK350 MAF Sensor
Does anybody know if there is a video available how to remove the MAF Sensor? I can't find it on youtube specifically for CLK. Thanks.
You use MAF sensor cleaner. The MAF is easy to find, but it can be hard to remove. Just figuring out how the connector unclips can be a chore in a tight space. You can actually clean it in place, although if yours is really oily then removing it may be best since you'll need to use more spray. The spray evaporates so fast that as long as you leave your air cleaner off and don't try to start it for a while you'll be fine. Like others said, at first you may think you just ruined your car. It will idle rough, may not rev above idle, may blow some smoke and may throw a CEL. Let it run a minute like that then turn it off and back on and it should be good as new.
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Joined: Dec 2009
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NO LONGER ACTIVE
It's not too difficult, just beware of brittle plastic clips and dry rubber hoses. Here's the WIS doc:
http://benzbits.com/m272/MAFSensorRemoval.pdf
http://benzbits.com/m272/MAFSensorRemoval.pdf
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Joined: Dec 2010
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2008 CLK550 Cab
The reason I cleaned mine in place was that I could not figure out how it unclipped and didn't want to break it. I have never understood why almost every electrical connector in a car has to connect in a different way, and the way is often not obvious, complex, very often difficult to do, and involves so may little tabs, clips and catches that there is a high risk you will break it. That is particularly true of connections to large components like MAFs and ABS controllers.
