Hi guys,

I would be really greatful If anyone here knows how to install (replace) the Air Flow Mass Meter in W220, 2000, S430



I've ordered the part and plan to replace it on my own, since It takes more than 500 miles to reach Authorized Mercedes-Benz Dealership.

If anyone is able to explain / suggest on how to find where Is it located (pictures would be great) and how (meaning if there is anything special method) to replace it properly. I'd reall appreciate your input. Thanks in advance.

P.S. Having troubles starting the engine and was suggested to get a new Air Flow Mass Meter to have this fixed.

Never done it, but I know where it is and it doesn't look too hard.

It's located near the rear of the engine compartment (near the cabin). You have to take off the engine cover/air cleaner assembly. I'll post up visual aids for you when I get home.

Thanks in advance for pictures newton22!!!
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That's because you have much better fuel in the USA than we do here. Even though the octane level is the same we have it less pure here. Hence I have to change the Fuel Injectors along with Air Flow Mass Meter and Fuel Filter far, far far far, far more often than I (if ever) did in the USA.

It's just I find it dumb going 500 miles to pay some dork so he can spend 5 minutes replacing the part just because I don't know where it is.

Thanks again!

What does the MAF have to do with dirty fuel?

Maybe you have dirty air?

Removal, installation

1 Remove cover at engine front face
2 Remove air filter with intake pipes
3 Disconnect electrical connector from hot film mass air flow sensor (B2/5)
4 Disconnect crankcase vent hose (1/2) from air intake pipe (2/2)
5 Press down lug (arrow) at air intake pipe (2/2) with a screw driver
6 Remove hot-film mass air flow sensor (B2/5) with air intake pipe (2/2)

CAUTION: Before removing the air intake pipes (2/2), disconnect cable (arrow) of electronic accelerator actuator.

7 Install in reverse sequence

Now that is a great post Oxygen You are learning fast.

Oxygen has access to all these awesome diagrams. I think I may sign up for that service too.

Come sit on my lap.

See what happens when you give a newb props. his head starts to swell.

Please don't refer to me as a "newb"... If you are still upset about the comment I made about your grill, please forgive me, jesus.

I think I contribute to this forum and so does everyone else, so don't disrespect me. My head is the same size.

Yesterday 03:44 PM
benznodubz said > Now that is a great post Oxygen You are learning fast.


I gave you a compliment for contributing, you responded by telling me to sit on your lap ? re-read it

Thanks a lot Oxygen. This really helped.

I still don't get why is it necessary to remove the whole air intake pipe when you can just remove the mass air flow sensor alone. Basically, step 4 and 5 is a waste of time. But I've got to say this. It is VERY hard to separate and detach the Air Flow Sensor from the Air Intake Pipe because it fits in there so f@cking tight I've been trying to GENTLY do it for an hour. Then I realized being intelligent with car repair is a waste of time and finally done it. It's a doable job for anyone. Don't be afraid to do it yourself.
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Now I'm figuring out how to replace the Fuel Injectors on my own

I felt the same way as you when I was trying to separate the MAF tube from the intake those!!

Yes, It takes enormous amount of effort to detach the MAF assembly because of the metal flap on the back. Plus, MAF is very tight to remove it for the first time!

... Totally agreed!!...

I just figured out that being sensitive, or for example, trying to be careful with everything on the car is plain stupid. One needs to use the grunt and force to do some task on the cars.

anyways. nice work :-)!