Engine rpm fluctuation at idle Mercedes-Benz C-Class w204

[@NoBody-jo5rj]

The most common problems could be spark plugs- coil pack - dirty throttle body - dirty air filter - dirty mas air flow sensor- clogged fuel filter Try to check them out.

[@averagedev7768]

Leaking injector copper washer is usually what does this on mercedes diesels. On OM646 EVO 170HP this is quite common to happen even before the actual tar is formed arround a leaking injector. Get it replaced fast before it damages the fuel return and injector wires

[@zeeshanmak2226]

Bro could you expound a bit more if it was explained in layman terms, my car is driven 72 kms and i changed the engine mounts a months ago which were damaged but did not solve this issue. My car is a w212 e220 cdi which is a 170bhp car as stated in your comment, how to go about this?

[@martinviken5329]

I have this while driving😅 when its cold its brutal, but otherwise not noticeable. Could it be the same as this?

[@antonophorvat654]

Did you solve problem?

[@faraitheengineer6101]

Clean or replace throttle body

[@apsindrou]

What the problem?

[@justchris1869]

I have the CLA Shooting brake 220d and it intermittently does this when im just cruising at a steady speed. It almost feels like it wants to stop when im driving and you feel like youre being pulled back but then it settles. By this time, i find out that my paddle shifters no longer work and i think the car goes into into limp mode. Switching the car off and on again resets everything and works fine, well until the next time it does it again. Its intermittent but can be reproduced pretty much every day. Is there anything i could just replace to see if it fixes it? The car has only done 65k.

[@K.D591]

Have you found the solution for your problem as i have the same

[@Sheikhalberti]

There is a long list of what could cause these but most commonly are a leaking injector, bad fuel pressure sensor/regulator or a vaccum leak. Hope this helps!

[@gabrielc5642]

Egr, clapeta de accelerație murdara, cei 2 senzori de presiune din rampa.

[@kirenpillay]

check torque convertor.

[@zahiralhajri8424]

Try purge valve

[@desislavffdimovff2187]

I have the c280 v 6 petrol 231hp does the sama any guesses why thx in advance !

[@andreacaka2855]

Hey ! I got the same problem but just wanted to ask you if you sort the car problem?? Let me know please.

[@-DGK-]

Check for CO2 Sensor, Injectors, Transmision Fluid and Throttle Body/Mass Sensor

[@markushassan167]

I had the same problem, definitely is the injectors, One Of The injectors wasn't working properly so I changed it now The car is perfectly fine

[@michaelyates5864]

02 sensors

[@BuszmenBiszmen]

Did u fixed it?

[@emiliandobrin1444]

Any luck?

[@BokiLanoGC]

Injectors

[@dan90z]

Cum ai repara?

[@ccoossttyynn]

ai resusit sa ii dai de cap?

[@nadeemchoudhery9194]

did you fix this problem? was the engine cold when it did this?

[@ccoossttyynn]

did you get to fix it?

[@JuanLopez-uu8pc]

Mine actually does it when it warms up

[@BokiLanoGC]

@@JuanLopez-uu8pc mine to

[@jakub_cepelak]

@@BokiLanoGC Mine does that when the engine is cold

[@emiliandobrin1444]

@@BokiLanoGC did you manage to fix it ?

[@m.r.9336]

X6 with N55 does this on highway speeds

[@ammarahmad6526]

I think I found this video on KZbin where she describes the transmission fluid needs changing. I have the same problem but I haven’t done it myself yet

[@ghejungky6581]

Fuel pressure regulator change

[@statisticsspeakforitself4205]

@@ghejungky6581is that the same thing as the sensor ?

[@tarmiziroslan]

Solved?

[@emiliandobrin1444]

Hello , did you manage to fix it ?

[@VladMagdu]

Salut! Asa face si la mine, cum s-a rezolvat?

[@ccoossttyynn]

ai resusit sa ii dai de cap?

[@damirviza]

A rezolvat cineva problema?

[@Alacimarian01]

Salut ți-ai rezolvat problema cu oscilațiile?

[@emiliandobrin1444]

@@Alacimarian01 salut , ai rezolvat problema ?

[@Alacimarian01]

@@emiliandobrin1444 nu

[@adamlaymouni88]

I had the same problem with my mb 220 cdi 2008 ..my friend advise me to run in the high way and drive crazy..Kik dawn and so for 30 minutes..and it’s work like a magic.......I drive usually really slow in boring way... So if you drive in the city usually the car need to run fast for some time and press the gas to the max for 3 to 4 time..

[@almirsuplja2656]

Hg

[@xscore4811]

Hello, does it fix it for good or only for a bit of time?

[@ghejungky6581]

Bad MAF sensor

[@TienBuilds]

Proof.

[@ghejungky6581]

for those of you who are still confused about the RPM going up and down, it can be from a dirty MAF sensor immediately cleaned with a special MAF liquid.. if it's clean and still going up and down, don't panic. try the next step. .you buy a new fuel pressure regulator, install it and feel the difference. it's located near the injector. do not forget to unplug the petrol fuse in the rear trunk. .

[@tomasmikunda8725]

Mine does it too does anybody know why?

[@AlistairTHOOR]

I encountered the same problem on my C220 CDI (see my channel) it was 3 faulty injectors 4. After change no problem. Try to see with a Mercedes garage if there is not an update available for the caluculator, this can help.

[@adamlaymouni88]

I had the same problem with my mb 220 cdi 2008 ..my friend advise me to run in the high way and drive crazy..Kik dawn and so for 30 minutes..and it’s work like a magic.......I drive usually really slow and ways !!!

[@emiliandobrin1444]

Did you manage to fix it ?