C-Class (W204) 2008 - 2014: C180K, C200K, C230, C280, C300, C350, C200CDI, C220CDI, C320CDI

Mercedes W204 OM646.811 Boost Ait Temperature 111c

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Old Jan 17, 2024 | 06:03 PM
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Mercedes W204 OM646.811 Boost Ait Temperature 111c

First of all Thank You for your time,

I have W204 C200 OM646.811 2008

Sometimes in the middle of driving the car shakes and hesitates to accelerate and in the moment the RPM keeps jumping between 1500/1800/2000 and then I press until half from the gas pedal and it hits instantelly 3000revs and drives normaly again. I got it checked by MB and other mechanics. The injectors are new, Pressure regulators are new, there is no transmition problems BUT when run on delphi even if the care is not driven two days It shows :



Boost Air Temperature 111 celsius.



When I give gas it keeps switching to 115/111 celsius.






Outside right now is -8 and I just ran the diagnostic with the car just started and before starting the same.



It happens when cold or from time to time. Any advice? I know this is not MAP or MAF sensor....where can I find it because it's driving me nuts.



Thank you

Last edited by DeviAngel; Jan 17, 2024 at 06:06 PM.
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Old Jan 18, 2024 | 05:11 PM
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Today I unplugged the MAP sensor and the car is acting like new so far. I tried unplugging the MAF sensor the car continued to do the same. I unplugged the MAP sensor and the car is driving like its brand new without a problem, has no hesitation when I accelerate, is super responsive and the consumption is still the same. My plan is to drive it 2-3 days to see if it starts to jerk and hestitate on low speeds, I even plan on driving it on the highway (I hope it won't be a problem).

Is it possible to have a vaccum leak somewhere? Or maybe the MAP sensor is simply faulty..I am afraid If I plug a new one in it will be the same problem...

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