W210 320cdi fuel line starting issue

Discussion in 'Engine' started by grizzly2020, Nov 16, 2013.

  1. grizzly2020

    grizzly2020 New Member

    Messages:
    3
    Joined:
    Sep 10, 2013
    Car:
    E320 W210
    Hi all. I was wondering if anyone could help.

    I have had the bus now for a few months and it is starting to grate on me this niggling issue. If the car is sat for any length of time it struggles to start. It turns over fine but sounds like for 5-10 seconds as if no fuel is going through and then boom it starts and away we go. It also cuts out if you apply some welly too when cold if your going up hill for example. Having spent a good wedge of money trying to get this fixed with no success at two mechanics (one being an MB specialist). Can you imagine how annoyed I was when I said to hell with it I'll have a look myself (I'm about as mechanically minded as a goat), took off the the engine covers (see pictures) and found in three seconds flat a seeping fuel line. Now doing some digging it would appear that these "plastic" fuel lines are notorious for failing as they age allowing air in which causes all the associated problems I've been experiencing ( it also suffers poor fuel economy 28mpg and major smokeage under hard acceleration).



    image-3440216006.jpg



    image-1667490801.jpg



    Can anyone help by answering the following?

    1. Assuming there are o-ring seals in the leaking plug (close up picture) what size should they be when buying these from somewhere like Halfords?

    2. I have seen on you tube a chap that claims that if you cut off the plastic pipe at the nipple of the plug leaving a little tip an 8mm fuel line can slip over with a hose clamp. Has anyone had experience of this? Can I use regular fuel line on the high pressure side or does it need to be this special plastic prone to fail crap?

    3. Can anyone recommend a good mechanic in the harrogate area of North Yorkshire? I can't believe I've spent the best part of £600 on useless S.o.B's when I spent five minutes of my untrained eye finding this leak.

    4. Is number 1 in the photo the fuel filter and number 2 the fuel pump? Do I have another pump/ filter back by the fuel tank?
     
  2. renault12ts

    renault12ts MB Club Veteran

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    1 Replace the pipes and o rings as a set...from MB.

    4. 1 is the fuel filter.
     
  3. WG M-B

    WG M-B Auhorised Forum Sponsor Authorised Forum Sponsor

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    How do you know such a small leak is causing your throttle issue?
     
  4. OP
    OP
    grizzly2020

    grizzly2020 New Member

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    Joined:
    Sep 10, 2013
    Car:
    E320 W210

    Cheers for the heads up.

    Out of curiosity how much do you reckon MB charges for the set? If it's cheap I think I'll cry.
     
  5. OP
    OP
    grizzly2020

    grizzly2020 New Member

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    Car:
    E320 W210
    To be honest I don't. But it doesn't happen when the engine is warm. Would I be talking daft if I say it's just the feeling I get that it's connected to this leak? By my rationale If the line lets too much air in i.e. more air than fuel on a surge then it would cut out right?
     
  6. WG M-B

    WG M-B Auhorised Forum Sponsor Authorised Forum Sponsor

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    A very bad leak would cause it to cut out but.....
    Most common causes of hard starting and cut out under acceleration are either an injector returning excessive fuel and causing the rail pressure to drop too low or
    The high pressure fuel pump
    I would change the seals on the fuel lines and cure the leak. The seals can be purchased from mb for pennies
     
    1 person likes this.
  7. Harlowcabbie

    Harlowcabbie Hardcore MB Enthusiast

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    Jun 19, 2012
    Car:
    Mercedes e220 w210
    Complete new set of fuel lines from mb about 40 quid .
     
    1 person likes this.
  8. Dieselman

    Dieselman Banned

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    Car:
    Peugeot 403 Convertible
    The leak looks to be coming from the filter housing, not the actual pipes.

    An air leak would cause the symptoms you are experiencing.
     
    1 person likes this.
  9. stability

    stability Active Member

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    Location:
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    Car:
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    why not do a leak off test on the injectors to be efficient

    if the rings are changed and injectors are working 100% this bus
    ( as you put it ) will start on the button
     
  10. Auto-mobile

    Auto-mobile Hardcore MB Enthusiast

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    Agree with dieselman on the housing leak, buy a new fuel filter (which comes with a seal)
    A couple of o rings from the main dealer, that's £10-£15 worth of parts and 30-40mins of you time.

    See how the car behaves after that.
     
  11. macker64

    macker64 New Member

    Messages:
    12
    Joined:
    Dec 9, 2011
    Car:
    w210 E300 Turbodiesel w210 e320cdi w124 300ce 24v
    Here you go:

    Fuel filter element A6110900051

    and the 3 diesel fuel pipes:

    A6130702132

    A6130701032

    A6130701132

    At a minimum I would replace all of the above and when this is complete you should fit the excellent EGR electronic bypass provided by DIESELMAN.

    Good luck!! :thumb:
     
  12. Auto-mobile

    Auto-mobile Hardcore MB Enthusiast

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    Egr is vacuum operated.
     
  13. macker64

    macker64 New Member

    Messages:
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    Joined:
    Dec 9, 2011
    Car:
    w210 E300 Turbodiesel w210 e320cdi w124 300ce 24v
    It is indeed vacuum operated. However, the transducer which drives the EGR valve on the W210 is electronically activated, which is what I was referring to in my original post.

    ;)
     
  14. E320 Bus

    E320 Bus New Member

    Messages:
    1
    Joined:
    Nov 23, 2015
    Car:
    W210 E320
    Did you resolve the problem

    Hi did you ever get the problem sorted?
     
  15. BlackC55

    BlackC55 Authorised Forum Sponsor Authorised Forum Sponsor

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    The post was back in 2013 so i doubt a reply.

    Do you have the same issue?
     
  16. W210Virgin

    W210Virgin Hardcore MB Enthusiast

    Messages:
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    Car:
    2002 S210 Avantgarde 320CDi in silver. Black leather interior
    The OPs car has since rusted away!


    Sent from my iPhone using Tapatalk
     
    1 person likes this.

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