MAF Sensor Cleaning
 

I over-oiled my filters and just removed them to re-wash and re-oil them. How can i clean the MAF? Where is the MAF located on the CLK550?

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.

Here you go, if you have searched a bit, i am sure you would have found it. :slap:

https://mbworld.org/forums/clk-class...ts-idling.html

my CLK shut of on me when idle just went up and down.. i need to reoil my air filters also nothing left in them.

DO NOT CLEAN THE CENSOR! i spoke to my mechanic he told me this will damage it even further so get a new one.

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.

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.

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.

My indie refused to clean my MAF. He said since my car is old, he is concerned that the clips would break.

In this aspect, the dealerships are better. If the clips break, they will have other ones in stock.

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.

It'd be helpful to watch a demo to avoid any possible damage to the MAF Sensor clip when removing it. Couldn't find on youtube specifically for CLK.

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

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.

I think it's job security for the techs. ;)

I tried to clean my MAS after running K&N filters...... it bought me about 2 wks afterwhich point I needed a new replacement MAS. GL.