E350 Cdi 2012 C207 - DPF Won't Regen Anymore

[geoffus]

Have you monitored the DPF levels whist driving ?
How do you know its not doing a regen during your normal journeys ?
I was surprised when mine started a regen at a relatively short run up the motorway at around 60mph, this then carried on along 50 mph B roads until I returned home.

As said before you don't have to go around thrashing your car at 3000 rpm to start a regen, as with most modern diesels it will regen without you even noticing,
And also as said before there is nothing wrong with supermarket fuel, you don't need a premium fuel to keep it clean.

 

[merc07]

Have you monitored the DPF levels whist driving ?
How do you know its not doing a regen during your normal journeys ?
I was surprised when mine started a regen at a relatively short run up the motorway at around 60mph, this then carried on along 50 mph B roads until I returned home.
View attachment 134466
As said before you don't have to go around thrashing your car at 3000 rpm to start a regen, as with most modern diesels it will regen without you even noticing,
And also as said before there is nothing wrong with supermarket fuel, you don't need a premium fuel to keep it clean.

It will regen when it is near its set distance/fill and if the engine is under load such as driving uphill it will start sooner rather than later...

 

[MrGundam]

I fortunately both V2 and V3 don’t show DPF % for my model and only show gram. It is currently at 29gram and showing over 7000 miles since last regen.

I have not been impressed with icarsoft at all and hoped v3 would fix previous issues but still no % shown, no DPF regen and not even showing miles correctly as it adds a digit to the total mileage. Very odd.

Weird thing is I’m not getting EML

 

[TeddyRuxpin]

EGR wise - I’ve done 175k and mine’s still working just fine - I’ve cleaned it a couple of times. Mine has also had the emissions update too which uses the valve a bit more.

Not sure why we're assuming it's an EGR issue, though.

MB V2/V3 - check what the latest operating system version is and you might find that you need to update the software on there. Unfortunately it requires a PC to do so, and I don't have one.

For me and my particular E350 (59 plate) variant, the MB2's DPF readings are completely erroneous. For my dad's 60 plate E350 265bhp, the MB2 shows all the readings accurately.

 

[merc07]

I fortunately both V2 and V3 don’t show DPF % for my model and only show gram. It is currently at 29gram and showing over 7000 miles since last regen.

I have not been impressed with icarsoft at all and hoped v3 would fix previous issues but still no % shown, no DPF regen and not even showing miles correctly as it adds a digit to the total mileage. Very odd.

Weird thing is I’m not getting EML

Mine also shows dpf% as g, ignore it, the figure is correct, keep an eye on it over the next 300 miles or so as it should rise to 100 then you can see it it starts going back down as it regens.

As for the Mileage figure, that means nothing on mine either - ignore it also

I have mentioned a dozen times, I don't know why people are fixated on the icarsoft for reading dpf levels when a simple app on your phone is much easier to use.

 

[m80]

I have mentioned a dozen times, I don't know why people are fixated on the icarsoft for reading dpf levels when a simple app on your phone is much easier to use.

Which app do you use to monitor the DPF level?

 

[MrGundam]

Mine also shows dpf% as g, ignore it, the figure is correct, keep an eye on it over the next 300 miles or so as it should rise to 100 then you can see it it starts going back down as it regens.

As for the Mileage figure, that means nothing on mine either - ignore it also

I have mentioned a dozen times, I don't know why people are fixated on the icarsoft for reading dpf levels when a simple app on your phone is much easier to use.

Ah are you saying the gram reading is infact a percentage and mislabelled ?

 

[alexanderfoti]

Not sure about that, I haven't used carsoft, but Xentry shows fill level in percent and grams independently. It also goes up to 400% so <9 doesn't make sense, but could be a mislabel.

 

[merc07]

Ah are you saying the gram reading is infact a percentage and mislabelled ?

I just checked mine for you..

Forgot, on mine, I divide the sensor reading actual data to get the percentage. When mine hits 7.5g on the icarsoft it starts a regen so in other words 7.5g = 100%
In my example below, icarsoft is taking the reading and dividing it by 100 to show 1.56g, the actual data reads 156

So, 156/750x100, gives 20.8%

Each time it hits 100%, the DPF temp quicky rises to around 650C and the percentage slowly drops back down to zero.

This is on a 2012 C class 350
Yours could be is different, you will have to find someone with the same engine/ecu who also has an icarsoft to monitor the % at the start of a regen...

 

[merc07]

Which app do you use to monitor the DPF level?

I use Torque Pro with my own custom Pid to view DPF values on Android.

 

[m80]

Yes I'm using Torque Pro also.
I start it most times just to monitor, engine mainly.
As I see the exhaust temperature (mine measures at DPF only) rising above 525 C I've set the gauge to flash, indicating it's in regen.

Because I'm paranoid about regen failure monitoring the soot build up would be a great comfort.
If you could let me have your PID set up it would be massively appreciated.

I did try an internet suggested set up but that failed.

 

[merc07]

Yes I'm using Torque Pro also.
I start it most times just to monitor, engine mainly.
As I see the exhaust temperature (mine measures at DPF only) rising above 525 C I've set the gauge to flash, indicating it's in regen.

Because I'm paranoid about regen failure monitoring the soot build up would be a great comfort.
If you could let me have your PID set up it would be massively appreciated.

I did try an internet suggested set up but that failed.

What ecu / engine is it, as it will be a different Pid if it's not the same as mine

 

[m80]

Mine is the 651 940.

Delphi. A651 900 93 02

 

[merc07]

Mine is the 651 940.

Delphi. A651 900 93 02

What engine is that ? Mine is the C350
Attached is the dash while I find the configs..

It won't attach, I'll have to rename the file somehow with my phone ???

Edit attached...rename it a .dash file,
See if the temps work first...

 

[m80]

The 651 is the post 2010 2,143cc, a mere 4 pot.
So a very different engine and ECU.

 

[MrGundam]

So finally got around to testing with Xentry which I have now purchased.

EGR
Like iCarsoft, Xentry is also showing my EGR as not responding when attempting to actuate manually despite not kicking up any errors. It only reads as 4% and actuating it manually within Xentry doesn't change the readings or engine RPM. I have already checked it isn't clogged and moves freely.

Testing actuation in Xentry:

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So can only assume it is the EGR motor or the position sensor. I have a 2nd hand replacement on the way to at least try and see it that helps whilst I try to source a new Mercedes part (A6421402160 - no longer available from Mercedes).

DPF
Xentry shows the DPF soot content inline with what iCarsoft showed, but with different acceptable values:

I attempted a forced regen through Xentry but it always failed with the below message:

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Unfortunately it doesn't seem to provide any additional information as to why it has failed which seems a bit counter intuitive for a pro diagnostic software. Is there somewhere else in Xentry I should be looking for this information as to why the regen fails?

Bit of a head scratcher as I am not getting any EML, just no DPF regen for a long time and am feeling it has a lack of power. Any pointers much appreciated.

 

[merc07]

The 651 is the post 2010 2,143cc, a mere 4 pot.
So a very different engine and ECU.

I guess it didn't work then ?