DPF BLOCKED

[suf]

hi urgent helped required please - CLS 320d 2055 model - dealer had the car at the weekend as EML light was on - advised DPF is blocked so a manual regeneration was needed - dealer tried this and still showing blocked - advised a replacement DPF is needed. option - buy new DPF £1800 steam clean DPF Remove dpf and remap ECU. your advise would be appreciated Thanks

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[RobertG]

why did the DPF get blocked, if you buy a new one and it gets blocked too would be a waste.
maybe its just the sensor that reads blocked?
What kind of driving do you do (a lot of stop and go)?
You cant steam clean the DPF inside, that gets done using a special machine that bakes it and then blows air through it.

[suf]

Originally Posted by RobertG

why did the DPF get blocked, if you buy a new one and it gets blocked too would be a waste.
maybe its just the sensor that reads blocked?
What kind of driving do you do (a lot of stop and go)?
You cant steam clean the DPF inside, that gets done using a special machine that bakes it and then blows air through it.

DPF sensor Was changed by dealer in July 11.

I do motorway driving 50 miles a day.

Not sure if it is going to be steam cleaned but the garage cleans DPF filters on merc sprinter vans.

Dealer said it is totally blocked as car is in limp mode fulltime

I have spoken to a software company who can remove filter and update software for £400

Thanks

[rbrtclk]

What is a DPF?

[konigstiger]

Originally Posted by rbrtclk

What is a DPF?

Diesel Particle Filter

You Tube

You Tube

[rbrtclk]

Thanks, makes all the sense in the world to me. The illustration was great. I guess that's why I do not see Black Smoke coming from Mercedes diesels anymore.

[RobertG]

Originally Posted by suf

DPF sensor Was changed by dealer in July 11.

I do motorway driving 50 miles a day.

Not sure if it is going to be steam cleaned but the garage cleans DPF filters on merc sprinter vans.

Dealer said it is totally blocked as car is in limp mode fulltime

I have spoken to a software company who can remove filter and update software for £400

Thanks

there is a delta sensor that compares pressures as well as individual sensors that read pressures at the inlet and outlet, mercedes might call them a different name,but they all work the same way.
Driving in a stop and go traffic will do the most trouble in getting it sooted up,it needs to get up to temperature and stay there for the soot to burn off.

What is the fuel quality that you are using and are you using any additives?
What kind of engine oil are you using, it has to be low ash engine oil.
Engine oil in the exhaust is also a well known culprit in taking out the DPFs .
I dont know the emission laws in your neck of the woods, but removing and bypassing the dpfs sound cheaper then replacing it with a new one.

[peko]

hi friends

i'm loocking for info to regeneration DPF filter please ?
i clean DPF but can't erase DTC, so i think car need regenration

anybody know procedure to erase this dtc using xentry

thank you