S-Class (W221) 2007-2013: S 320 CDI, S 350, S 450, S 500, S 550, S 420 CDI, S 600

DPF sensor

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Old Nov 17, 2019 | 06:05 PM
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Mercedes Benz S-Class W221
DPF sensor update

Hello guys!
My car goes in to limp mode a few minutes after starting it, even imediatly if i floor it. If i stop the car then restart it it works fine then again it goes in limp mode.
The star says Particle filter defective, probable cause DPF pressure sensor.
I would want to know if the sensor is found under the hood like in the pic attatched or under the car, cause i would like to change it myself.
Also i would like to know if the part number is corect A0061539528
Vin number is: WDD2211261A399355
I can't seem to find an original part, i have found some made by Bosch and other manufactuers, will it work as the original and will i be able to delete the error?
thank you in advance!


Last edited by C.zaharia247; Dec 4, 2019 at 04:57 AM. Reason: Missing text
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Old Nov 17, 2019 | 08:10 PM
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2012 S350 Bluetec 4MATIC; 2011 ML350; 2005 C230k;
What's the error code you have? The part number is correct but old. Here is new part number: A6429050100

Last edited by artim808; Nov 17, 2019 at 08:22 PM.
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Old Nov 18, 2019 | 04:13 AM
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Mercedes Benz S-Class W221
Thank you very much.

Originally Posted by artim808
What's the error code you have? The part number is correct but old. Here is new part number: A6429050100
I think the code is 129700
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Old Nov 18, 2019 | 10:41 AM
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2012 S350 Bluetec 4MATIC; 2011 ML350; 2005 C230k;
Try to replace DPF pressure sensor under the hood. See attached PDF how to replace it.
Attached Files
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Old Nov 18, 2019 | 04:01 PM
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Mercedes Benz S-Class W221
Will do.

Originally Posted by artim808
Try to replace DPF pressure sensor under the hood. See attached PDF how to replace it.
Is the heat shield held in place by some bolt or i just have to pull it upwords?
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Old Dec 4, 2019 | 05:03 AM
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Mercedes Benz S-Class W221
Changed dpf pressure sensor

I have changed the dpf pressure senssor woth one made by Bosch. At first it allowed me to clear all fault codes, all clear and good. Whent for a test drive accelerated with kickdown it went in limp mode without check engine. The same error shows up, Dpf filter deffective, probable cause Dpf pressure sensor.
i must say that the car only goes in limp mode on hard acceleratioms. If i accelerate slowly it drives normal without problems for any distance.
any ideas anyone?
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Old Nov 25, 2021 | 03:35 AM
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Originally Posted by C.zaharia247
Hello guys!
My car goes in to limp mode a few minutes after starting it, even imediatly if i floor it. If i stop the car then restart it it works fine then again it goes in limp mode.
The star says Particle filter defective, probable cause DPF pressure sensor.
I would want to know if the sensor is found under the hood like in the pic attatched or under the car, cause i would like to change it myself.
Also i would like to know if the part number is corect A0061539528
Vin number is: WDD2211261A399355
I can't seem to find an original part, i have found some made by Bosch and other manufactuers, will it work as the original and will i be able to delete the error?
thank you in advance!
what software is this please?
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Old Nov 25, 2021 | 12:54 PM
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that is the dealer STAR / XENTRY stuff - way more comprehensive and powerful than 5k's worth of snap on kit... (but only works on a Mercedes vehicle - it comes with idiot guides) if you own a few Mercs or keeping one longer than 18 month check/contact this guy here - he'll help u get set up with own system - it will save you thousands and let you do stuff you want to but can't afford


https://mbworld.org/forums/s-class-w...-software.html
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