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DPF Question

Discussion in 'Engine, Drivetrain, Fuel and Exhaust' started by Matthew James, Aug 2, 2020.

  1. Matthew James

    Matthew James New Member

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    Mercedes c220d w204 2011
    Hello all,

    First time poster bit hopefully I'm in the correct section!

    For about a month now my car has been intermittently losing power. It would not go above 3000 rpm and also took longer getting there. Sometimes the engine management light was on, sometimes it wasn't.

    I took it to a local garage and he connected a diagnostic machine and I'll upload what it said. He said my DPF was blocked, which with the reduced mileage due to working from home is in the realms of possibility. Although the problem started straight after I had my car serviced by this garage (oil change and filters changed).

    I'm not filled with much confidence with this garage however as he said my car has 2 dpf's? Is that even a thing?

    Also, to add to my woes, last night my handbrake stopped working. The footbrake has tension, but once depressed it immediately lifts back up. The handle seems to be 'popped out' which following some googling seems to be what happens in this instance.

    Does anyone here know what may have happened?

    I appreciate greatly anyone who takes their time to read this and even more so anyone who may offer advice.

    Kind regards,

    Matt
     

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  2. CowleyStJames

    CowleyStJames Senior Member

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    Your Mercedes:
    Mercedes-Benz C-Class Estate C200 CDI BlueEFF. Executive SE 5dr
    What year and engine?
    The readings showing on the diagnostics is pointing to the DPF Pressure Sensor. These are common failures, easy to change, then run a manual regen. Couple of hours labour, £40 for the sensor.
     
  3. CowleyStJames

    CowleyStJames Senior Member

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    Your Mercedes:
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    By the way, whatever Mercedes you only have one DPF
     
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  4. OP
    Matthew James

    Matthew James New Member

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    Evening Cowley,

    Thanks for your reply. It's a 2011 (61 plate) W204 C220d. Also, I assumed so, never heard of a car having two but although I like to think I'm good with cars, I'm not .

    Also when you say a manual regen, is this where I drive for x amount of time above 2000 rpm to force the regen?
     
  5. Tony Dyson

    Tony Dyson Senior Member

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    Your Mercedes:
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    I wouldn't be filled with confidence either with a mechanic believing you have two DPF's, you should post your location so members can advise your nearest MB Independant garage, or use the 'Mercedes Specialist Finder' at the bottom of the page, who will know how to deal with either a blocked DPF or faulty Differential Pressure Switch.
     
  6. alexanderfoti

    alexanderfoti MBO Forum Supporter Authorised Forum Supporter

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    Yes definitely only one.

    If the car is in limp mode the DPF will not automatically regen, the same is true of the DPF has gone past a certain fill level.

    It will need diagnosing, reseting, and potentially a manual regen carried out
     
  7. OP
    Matthew James

    Matthew James New Member

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    Hi Tony,

    Thanks for the advice on location. I'm based in Bolton, but work in Stockport so I cover most of Manchester.

    Won't be taking it there to sort, and I'll try the specialist finder you've just mentioned.
     
  8. CowleyStJames

    CowleyStJames Senior Member

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    Doesn't generally work when EML light is on. Change sensor, and a good indie will start a manual regen using Autel, Star, or similar diagnostic.
    Even the Icarsoft MB-2 V2 will do it.
    Car is stationary, or you could go for drive whilst it's regenerating
     
  9. CowleyStJames

    CowleyStJames Senior Member

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    I think you have DAS automotive in Bolton, seems to have a good reputation
     
  10. CowleyStJames

    CowleyStJames Senior Member

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    Another thing has come to mind, did the local garage use a low ash oil? Should be 229.51 specification.
    If not, that can bugger up the DPF
     
  11. alexanderfoti

    alexanderfoti MBO Forum Supporter Authorised Forum Supporter

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    It can do, but it would take a few thousand miles to have shown an issue.
     
  12. alexanderfoti

    alexanderfoti MBO Forum Supporter Authorised Forum Supporter

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    MB software prevents stationary regens now, as they get super hot!
     
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  13. CowleyStJames

    CowleyStJames Senior Member

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    True, but I thought I'd throw that in the mix so the ops aware of this
     
  14. OP
    Matthew James

    Matthew James New Member

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    Unfortunately I didn't ask as I assumed they'd use the correct oil.

    My first thought was the oil grade wasn't upto standards.

    I think prior to my post I read one of your posts from 2016 where you had your dpf, oil and filter done for £185 using OEM parts. This wouldn't be too bad do I'm hoping I'll get quoted similar.
     
  15. OP
    Matthew James

    Matthew James New Member

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    In which case it probably isn't the oil, probably happened about 100 miles after
     
  16. CowleyStJames

    CowleyStJames Senior Member

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    Yes, that was MBS in Southampton, great people.
     
  17. OP
    Matthew James

    Matthew James New Member

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    Main dealer? If so that's actually brilliant. Every quote I've ever seen previously from a main dealer have been ridiculous
     
  18. Blobcat

    Blobcat Moderator

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    MBS is an Independent Mercedes Specialist - @Cole@MBS is a member and forum supporter here.
     
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  19. Kev555

    Kev555 Senior Member

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    If I suspect you have the OM651 engine you will have a cat before the DPF as on mine, only found out what is was recently myself when cleaning my own DPF. Didn't think a cat was in diesels until this. Probably why your garage man was on about 2 DPF,s.
     
  20. alexanderfoti

    alexanderfoti MBO Forum Supporter Authorised Forum Supporter

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    Diesels had cats for a long time, 1999 I think?
     
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