Cleaning MAF and Throttle Body on a Mercedes-Benz 2008 - 2014 C300 and C350 (W204)

Cleaning Mass Air Flow Sensor and Throttle Body on 2008 to 2014 C350 (W204) M272 Engine

[@Adobe4Sure]

Thank you for giving me the courage to do this on my C300 W204 Sports 4Matic, followed the instructions in the video and it worked out good; when I first started the car it wanted to stall out, after shut off and restarted and it was back to normal, my baby rides like a princess now! Thank you

[@jhector793]

I have the 2010 C300 4matic. A month and half ago it became hard to start whenever I refueled. I will repost if this fixes the problem.

[@b.trill6868]

Same problem with me it like sputters like it wants to shut off then go backnon

[@YouTubeUserToo]

@@jhector793 status?

[@zakareya45]

@@b.trill6868 did you find a solution? Im currently in the same situation 😅

[@monclersupreme4962]

@@zakareya45 yes yes I did after spending 1500$ on parts and labor that did not need to be fixed. Comes to find out there was a hole/gash in my intake manifold! So ended up buy a new one for around 354 and 450$ labor sheeesh but then ran smooth as new! But then shortly traded in! To upgrade to my new s5 😎

[@Norcalw204]

Thank you sooooo much! I can’t tell you how much this saved me. Just did this on my 2010 Mercedes GLK350

[@bigdawgheada1127]

Thank you very much I’ve just watch this video and I clean it out,now my car runs smooth.🥳

[@sussayn]

Wow, what a video. So impressed by you. I now feel confident to do this on mine, and hopefully should fix the surge issue! Thank you for the amazing material!

[@AaronsTalks]

Did it fix your surging?

[@sussayn]

@@AaronsTalks unfortunately no. I replaced thousands in parts from MAF, to driveshaft couplings, to throttle body. Ended up selling it.

[@AaronsTalks]

sorry to hear this. Hopefully mine is easy fix@@sussayn

[@cam5816]

@@sussayn Did you screw anything up by mistake or did your car already have those problems? I’m worried about working on my own car right now but this thing is a money pit and I just want to do it whatever I can to get it working better again-but I’m also scared of possible repercussions I’m not aware of

[@jf5016]

I had misfires 4-6. That stopped when I unplugged the MAF. Chasing coils and plugs was a foolhardy mission for sure. My plugs did look pretty bad. No difference with new ones. The coils I ordered all shorted

[@Turco949]

Good video! 75% of the solvents can be used for multiple purpose but the manufacturers are smart, they create a new solvent type to sell more. You could actually use Brake Cleaner for all those components, and just the inside of the parts (no need to spray the outside of a plastic hose with the solvent, doesn't help one bit). Also doesn't need more than couple of seconds of spraying.

[@myrnapelano4974]

Thank you for explaining. 2010 C300

[@daveycrockett9447]

Your videos are top match... the attention to detail and the precise video to show EXACTLY what you are doing UNLIKE other videos like Pelican parts - this is second to none. Thanks for the excellent video. Would be great if you have a video on replacing the coolant temperature sensor. I believe its near the Mass Airflow Sensor... .as you have to remove it - but havent seen any detailed videos on replacing it and its not in the most easiest place to work on. Anyways.. great video - I am a new subscriber and fan.

[@andredesjardins9284]

Very helpful. Did all the cleaning but still running poor. Will need a new MAF

[@stormrider01]

Could be also the in german called the „Ansaugbrücke mit Ansaugklappen“. The plastic parts inside and the plastic leavers at the front can break or get stuck. The whole part isn’t that expensive, 400-500€

[@cam5816]

How do you know you need a new MAF? What are the signs that gave it away to you? I want to use Seafoam Spray Top Engine Cleaner in one of the Engine Air Ducts without the filter (the website says that it’s totally okay and then elsewhere not to do it) so I’m curious what to be looking out for or if the MAF might already even be a problem on my old 2010 c300

[@YouTubeUserToo]

What does the other side of that throttle body butterfly look like before/after cleaning?

[@Gonnabeflyin]

Very, very, useful. Thank you.

[@chrispoklacki2223]

coffee filters are a cheaper and better alternative to paper towel or "fiber free" shop towel.

[@diegodelaraspa3354]

I did a whole coolant system on my 08’ C300 put a new water pump new hoses upper and lower new thermostat new oil filter housing assembly and still over heating I also put a new radiator fan. What could be the problem.

[@CollegeBoyTrey]

Hi, would you happen to know the part number to the silver clamp that is attached to the crankcase breather hose and elbow air intake? Maybe even specific name? I’m trying to find it in FCP euro, but want to be sure its the right one

[@l.c.972]

Very good tutorial, thanks for that. But, was the reason for cleaning, do you had any symptoms?

[@MichaelMiller-xy5uc]

I have a 2009 Gl 450, I go out and start the car, let it run for a min. and wipers won't come on and blinkers are blinking really fast, it does this every so often, oh it also tells me several bulbs need to be changed, when it's running right all bulbs are fine

[@kehindeodunowo8571]

Thanks for the rich information. But I just changed my Maf but the check engine light refused to go away even after replacing the maf. My question is; does the light disappear immediately after replacement?

[@jrock5995]

You need a obd2 scanner to reset the code. Then it will be good.

[@cam5816]

What ended up happening? Did you have any problems with your car besides the system warning?

[@tksmem]

Great video thank you. Sort of related, if wanting to do a GDI cleaning which you NEED to avoid all contact with the MAF sensor could you spray it in via the PCV hose on the air deflector?

[@DustineN]

Question sir! What is the reason why clean the MAF and throttle body? 1. Is it when driving, you get a stalling motion or lunging? 2. Cold start rough idle I'm asking because on my 08 c350 w204 I get No.1 as an issue right now. Thanks for the respond

[@yokev_5611]

Funny how you asked that I have the same car, threw the engine code misfiring and all that. Did you ended up getting it fixed?

[@riverfk4881]

@@yokev_5611 did u find out what was wrong?

[@sebas-x9792]

What happened at the end ?? I got a 09 c350 w204 and it’s doing the same thing…

[@IKhanNot]

Very helpful. Thanks. Cleaned both the MAF sensor and TB in addition to changing out the filters on my 2012 C300. Car no longer has a cold start shake it had before.

[@NK1794]

That's awesome to hear. Thanks for watching and for your comment.

[@glasser2819]

What mileage did you have when it started shaking cold?? Did you find oil excess in filter? Benz plastic oil separator is known to need regular replacement else multiple oil issues (I have a '14M276)

[@ciscoelnino9237]

Excellent video!!! props!!!

[@JalonBerrios]

I’ve always removed the throttle body and re train the computer usually turn on ignition and wait for 30 seconds and turn off then start

[@moonyachti]

Will this help pass smog for black smoke to appear when revved for smoke check?

[@robjob2]

That was very well done! I'm subscribing!

[@jf5016]

Friend. Why didn't you start the car? The mass airfow sensor does not go back on easily does it? Also, the connector to the MAF is a son of a gun! Especially in my 2006 R350. Thanks for the video. Gave me some ideas...

[@phpalencia]

Looks like you need to replace the PCV too much oil in the intake

[@boosteroids]

Quick question, how to eliminate rev hang on w204 c280? The accelerate is quick, but when i let go the gas, it's so slow for the rpm to going down

[@trevorwilliams1089]

Try resetting your transmission

[@jorgemariobetancur3329]

Hi, do you know or remember what was the average consuption before and after clean de MAF? thank you

[@cam5816]

Will the MAF affect that very significantly? I was going to use Seafoam Spray Top Engine Cleaner through the Air Duct but worried about the MAF, now I’m wondering if the MAF might actually already be a problem anyway contributing to my low mpg

[@Dnasty1]

What indication did you have of a maf sensor issue?

[@RIchardDavidson007]

I believe your missing the tension retainer air filter clip off the mass air flow sensor housing. It's needed to keep the air coming in from the air filter and not thru the neck of the mass air flow and by passing throat opening from the filter not being properly seated. The latch will latch onto the air filter housing. To much air maybe making for to much gas. I'd use some Sea-foam in the fuel to clear up air intake fouling and carbon build up., Nice clean up job and video.

[@yokev_5611]

What was the reason for cleaning it? Rough idling?

[@RothBeyondTheGrave]

Air/fuel ratios were off, in his case running rich. When people don't change out the prone to fail oil separator & crankcase ventilation valve (pcv), the intake manifold gets sludge build up via oil leaking in and all hell breaks loose. If you catch those leaks in time and clean maf/throttle body, you can save your intake manifold, but I believe this guy had to replace his after all.

[@jhector793]

Awesome video. Thank you so much!

[@The_McD]

Few Questions. 1. What was the mileage? 2. What compelled you to clean it? Rough idle, poor gas mileage etc. ?

[@NK1794]

Nicholas McDonough It was at 82k miles and had rough idle. The problem turned out to be the swirl flap rod. See my other video on that.

[@cedjazz]

Was it “Lunging“ while you were driving too??…

[@NK1794]

cedrock I didnt notice that.

[@The_McD]

@@NK1794 - Interesting my flap broke at almost the same mileage. At present, the car appears to be burning oil. Argh.

[@ej2civicb736]

Did it fox the rich issue or did you have to end up changing o2 sensors how do you know it was ru ning rich did you get o2 sensor rich code what did the short term and long term fuel tables show

[@demetriingilis9965]

hi. thanks for the video. i too have a M272 engine. dealership wants me to perform throttle body service. 1. is everything you showed in this video considered the throttle body service? 2. when cleaning the throttle body by sticking your hand in, did you push the valve open with your fingers to clean behind it?

[@bobespnza-la7030]

Great question

[@MBZXZ]

don’t recommend push the valve because it’s spring loaded and with computer calibration

[@demetriingilis9965]

@@MBZXZ I have read some articles that you can. When you put the key in the ignition after the service and turn it once (not to full ignition position), the computer calibrates the valve opening again by clicking.

[@hitzoneproductions7858]

@@demetriingilis9965 True. But I don't advise. I advise taking the MAF and throttle body completely out to clean it properly.

[@MrsJc48]

Put key second position don't start engine... put a stick or something on gas pedal wot (wide open throttle) and proceed to clean electric throttle. No need to spray directly. Spray on rag and clean!

[@couchmayne4351]

You just saved me $1600 thank you bro just subbed

[@swift4311]

Any code causes this?

[@cam5816]

What was the problem?

[@jdantigua1999]

Nice video. Do you clean the intake Manifold? Seems that now would be the time to do so.

[@mlaverne]

Is that the thing you spray to help the car to start

[@SheerMagnetismDarling007]

Well done bro… you RULE !

[@YouTubeUserToo]

Did it help solve a problem??

[@oriancunningham]

was probably the actuator arms on the intake huh

[@SOHAIL50280]

I have GL 450 this car is miss fire and black smoke give idea

[@TorchyBurns1]

Why didn't you start it?

[@teddiazjr.6223]

Great video and detail

[@brunojato6508]

Very good video. Thank you so much.

[@b.trill6868]

I have a vacuumm leak what hoses should i check?

[@JoseCelentano1]

Do you push the butterfly plate open when you cleaning?

[@Busan0001]

Is it okay if the spray gets into the engine?? Nothing harm??

[@stormrider01]

He used too much, don’t do that

[@zikuicai8801]

Thanks for the nice video! Where is the Throttle Position Sensor located? My car has engine codes on Throttle Position Sensor so I was wondering if I could replace the sensor to clean the codes.

[@225Alpari]

I am here looking for the same answer :(

[@zikuicai8801]

​@@225Alpari For Mercedes, I guess the TPS is built-in in the throttle body, if it was the problem with TPS you may need to replace the whole throttle body. The trouble codes I had were P0123,P0222,P2135. There could be multiple causes including the accelerator pedal, throttle position sensors (TPS) or just the problem in wiring. Therefore I would recommend you to check the wiring first and then the signal coming out of the padel and the signal going into the throttle body to identify the problem. My mechanic found that the throttle body was not responding to the signal. After removing the throttle body assembly they found that the wire had been compromised by chewing rodant. Repairing wiring fixed the problem.

[@225Alpari]

@@zikuicai8801 Thank you very much for your kind info!

[@aymanalhousa4069]

Thanks Sir 🙏🏽

[@qtalal8]

Thanks for the vedio ..icanot find the click sound ..between intake and massflow sensor 😢

[@hectorjuliangarciatriguero4089]

What can I do if I moved the butterfly, and I feel that now it is not calibrated, how could I solve it, thank you😅

[@green1394]

SELAM ,,VERY GOOD JOB,,,but you did not start the car,,,

[@glasser2819]

too much cleaning juice sprayed floods the engine cylinders with parts cleaner... the part to clean up is where the butterfly meets the bore walls 👍🏻

[@danielfernandez9469]

Very good Sr. Thanks

[@NK1794]

Thank you, sir

[@beckbenz9707]

Clean job

[@RAFAELGONZALEZ-kc2yn]

Yeah but dirty and awfully rough handleing of car parts,it is easy to brake plástico car parts not being carefull....good video, but very dirty careless work .

[@tomaspakutinskas4709]

Is there that black pin a transmission chech fluid pin??or add pin?

[@zakylib]

What else can I use to clean the MAF besides they thing you used?

[@jhector793]

Please only use MAF sensor cleaner. Don’t spray your MAF with anything else.

[@cam5816]

@@jhector793 Is it okay if I use Seafoam Top Engine Cleaner Spray in the Engine Air Duct or do I have to remove the MAF (it seems a little overkill and I don’t know what to do with it gone but Seafoam’s website gives me conflicting answers-they say not to worry, and then on other page they say they don’t recommend it, etc.)

[@swift4311]

Any code cause this ?

[@gamerfoxz3304]

Good video but I think it would be better if you showed the code and the fault of the car before ..

[@kristofthibaud8491]

Couldn't you just leave the MAF in the car and spray it through the metal mesh?

[@kito1san]

Not really, All the cleaner will flood the Air Intake as it funnels into the throttle body. Besides, you should also be cleaning the Down elbow pipe and also the throttle body since you are at it. It would be a less than half of a job if you just spray it while it's still on the car.

[@donaldmullally8344]

Nice work thank you Sir

[@davidwakefield1196]

You do realize that the whole complete other side of your throttle body looks like shit still since you didn't clean that side. Not sure what good it did if any at all?

[@jordi_devries]

Our 350cgi sometimes seems to misfire while idling. You will hear it from the exhaust and feel it in the car. Also when driving 110 kph it sometimes starts lunging as if you were giving it throttle and releasing again. Does anyone have an idea? Sparkplugs and coil have been replaced already.

[@Schnitzeldawg]

i have the same issue with my c350, i’m thinking it’s gonna be the throttle body. i’m going to clean mine tomorrow and I’ll let you know if anything changes

[@jordi_devries]

@@Schnitzeldawg let me know if it had any effects. Also check you spark plug cables in te dark to see if they don't pass any sparks to something metal. This was the case on our car. The issue seems to happen less now we have changed the cables but it still happens.

[@paulmudzingwa8611]

Hi, I have a 2007 Mercedes W203 C230 with a m272 V6 engine and the car runs so smooth my the problem is showed a check engine light and I had the fault code 0745 self adaptation of mixture formation for enrichment at idle for the right cylinder bank is above permissible limit (P0171). Permanent 0749 self adaptation of mixture formation for enrichment at idle for the left cylinder bank is above permissible limit (P0174) Permanent What could be the problem

[@NK1794]

I would start by cleaning the MAF (mass airflow sensor) and the clear the code. See if that helps. Be sure to use the right cleaner. See my other video on that. Thanks for watching. Also check for any vacuum leaks.

[@paulmudzingwa8611]

NK1794 hi, I did clean and cleared the fault code and it popped out back again after a day so I don't know what it is now

[@NK1794]

Are you able to check for vacuum leaks?

[@paulmudzingwa8611]

NK1794 Ok how can I check? I have about 161 000km on the dash and it drives so smooth even the idling it's so smooth

[@NK1794]

I found this video. kzbin.info/www/bejne/nJfQq5aCZpVjmrc

[@MrKikicat5]

I didn't see you changed anything, beside throttle body

[@tonyo8498]

I have two issues on my Mercedes Benz ML320 1999. 1. The engine running very smooth but most times it it enters pot hole,i will not be able to accelerate again, but the engine will be steaming.I have to stop,turn off the engine,the start again and the throtle will start working fine again. 2. Similar stuff happens with the gear.At some point,i will realize that the gear is no longer selecting and I will stop,turn off the engine,then turn the engine on again and the gear will start to sel;ect fine again. Please i need a solution.

[@lampardalistair5291]

My Mercedes Benz2007 don't start

[@iduajonye2280]

This indicates that your throttle body is faulty. You will need a total replacement.

[@iduajonye2280]

This indicates that your throttle body is faulty. You will need a total replacement.

[@tonybrit2k]

did you remove the spring clip that goes over the maf sensor ? , didnt see it ..

[@NK1794]

Anthony Oliver Yes, it was missing. I got a replacement from the dealership.

[@tonybrit2k]

@@NK1794 working on the wifes glk350 tomorrow hope its something simple ... already changed the MAF sensor still running bad .

[@HOTROD256969]

What was the issue with the car that prompted you to clean this. My car is stalling and sometimes dont move when you press the gas. Diagnostic test says the throddle pedal is not sending enough voltage to the engine. I am trying to see if it's the whole pedal with the sensor that need to be change

[@eltanquezito805]

@@HOTROD256969 these cars are mostly electrical could be something as simple as a fuse... 🖖

[@freebird6975]

@@eltanquezito805 you work on cars?

[@daysi3106]

Thank you !!

[@Smudg]

Hi, I am having P0171, Rich Bank 1, I did all the above PLUS replaced the PCV Valve, Cam Shaft plugs, cleaned the throttle body and the Air filters and still I am having the same issue. The cluster display for the MPH and MPG is very odd, when in idle the MPH is very low (7 -10) and the MPH is 11.00, when driving the mPH and MPG go up but again, when idling the same issue and gas consumption is very high. Any advice is very much appreciated. Thank you.

[@freebird6975]

Did you find the problem by any chance?

[@Smudg]

@@freebird6975 Yes, I did not press the air filter case firmly onto the MAF and it was not sealed and was acting like a leak, once pressed on firmly and encapsulated the MAF then all was good.

[@freebird6975]

@@Smudg ok thank you I'm going to have to take a look at it tomorrow

[@dudebyob]

Have you resolved the issue yet? I'm having a similar issue.

[@Smudg]

@@dudebyob The cover with Air Filters was not inserted properly on top of the MAF.

[@jacobbreyna9215]

Idk what I did wrong but after cleaning the MAF it gave me check engine light and it’s not working correctly….

[@andrewkubisch9225]

Remember did you plug in all the wires correctly? 2 return emissions one on the intake redirect to the valve cover and the other on the air filter covering by the front. Also make sure you plugged in the airflow sensor in the little neck piece with the mesh grill. If that didn’t click properly it will throw a code.

[@cam5816]

What is going wrong? What problems are you experiencing besides the system warning? Did you try driving it around for a while and letting everything clear out?

[@samtehrani9861]

thanks was very useful

[@NK1794]

Thank you for your comment. I’m glad it was helpful.

[@dutifer]

Do you clean it while is working in ralentí?

[@retzknuckle2023]

you forgot to put the wire latch back on.

[@elviejon84ful]

This work on e350 w 212 ??

[@NK1794]

I'm not 100% sure but I think the same procedure should work for you also.

[@elviejon84ful]

Sounds good thank you

[@glasser2819]

it should be very similar... Remove the throttle body make it easier to clean behind the flap and lube the teeth on the gear reduction wheel... its cheaper than buying a new one later 🙂

[@freebird6975]

@@NK1794 do I have to disconnect the battery?

[@Verbalism]

You didnt start the car at the end 😢

[@goolinoli2120]

Hi i have c300 4 matic and i have 1 problem. When i give speed to the car in 2 or 3 gear, the gas does not get well but with the hull as if if lacks air. I clean this but still same. Any one help me what is this problem i have.

[@madsupervilian.]

How you know when to have it cleaned? My ml350 with same m272 engine @ 115k miles

[@NK1794]

If it were my car I would clean it every 50k miles. Thanks for watching

[@tonybrit2k]

8.00 missing wire ?

[@NK1794]

Anthony Oliver Yeah, I meant the clip

[@totomek1000]

will subscribe for my CLS w219

[@cam5816]

Can anybody let me know how to use Seafoam Spray Top Engine Cleaner in this car? Can I not just take out the Engine Air Filter and use the air duct, spraying from a good distance away, or do I literally have to take the MAF out and run the car without the top air ducts and attached and spraying directly into the Throttle Body while the RPMs are being pushed?? This is very confusing to me and I’m thinking about just saying f*ck it and getting some MAF Cleaner just in case and using the air intake like I was initially thinking. The website says two completely different things! It seems like way more headache and confusion than it should really be to use this spray on this car, every other car is like a piece of cake for a quick clean/touch up of the Throttle Body. I’m not trying to go full mechanic, I’m just trying to do what I can to get my grandpa’s old car running better (it vibrates like crazy and is slow to accelerate and react)

[@hellomoromios]

You are not gentle at all while installing all the parts back together. Also this main cover that sits on the MAF was not fitted in place tightly

[@bendon1303]

what would cause oil to be in there ?

[@glasser2819]

the legendary Benz oil separator design that leaks oil in a hurry on the hot exhaust and oily MAF sensor & throttle body.

[@justinbaltimore7620]

5:39 did dude just fart 💨

[@cam5816]

Oh my god dude I think he actually did fart and went back and cut out the audio lmfao 😂

[@teufelhunden5571]

How about putting some rag under there.

[@AnzanAnzan-g5x]

Job working with me

[@aaydieh]

That's not done. You are making the easy thing a disaster. Too rough on plastics. If I am client I won't bring my car for you. Sorry for that, but you didn't even smoothly finish closing the plastic cover on the MAF PERFECTLY. Please accept my comment in a positive way, so next time you can take care more and slow down if something got broke that's a USD been spent. Thanks for the share.

[@jeevanreddy1335]

wtf would you say that? he used break cleaner on plastics, he didnt connect MAF correctly in postion, never bothers about plugging the intake on the top of MAF, cleaned the Electronic throttle body with hands and shop towels. All these are perfect curb side dude jobs.

[@ej2civicb736]

This didnt even fix his so called problem anyway I bet probably has a leaking intake plenum causing a vacuum leak I watch videos like these out of bordem to watch some very skilled do it your selfers then some complete hacks that clams to be mechanics

[@sergiorosales1689]

Thank you!