non starting W210 300TD HELP reqd please

Discussion in 'Engine' started by BIG Sean, Aug 14, 2008.

  1. BIG Sean

    BIG Sean Hardcore MB Enthusiast

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    my mate[an old school mechanic] bought a cat d S/R 1998 e300td, that wasn't running [no key]he traced previous owner, got her to get new key from MB Blackburn and all was working fine.

    Leaves it for three weeks or so, then won't start, so charges battery, turns over but still won't start, a bit low on diesel so he puts 10L in, still won't start but is turning over, he is getting fuel to the pump he has checked, but is stumped as to what could be the problem.

    Could the immobiliser have kicked in when battery flat or something? anything else? what else can he check or do?
     
  2. OP
    OP
    BIG Sean

    BIG Sean Hardcore MB Enthusiast

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  3. rpe2

    rpe2 Hardcore MB Enthusiast

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    Check for air in fuel lines, if you can see bubbles then you have a leak, replacement of lines not expensive, just fiddly.

    Think tha there's a 'HOW TO@ on here somewhere

    Richard
     
  4. DrNick

    DrNick Hardcore MB Enthusiast

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    Yes, sounds like an air leak. On mine you could see the bubbles in the clear fuel lines. You might get it to go by topping up the fuel filter directly with diesel, or cranking for ages on a good battery to prove the point, but the long term solution is either new seals on the clear pipes or just fit new plastic pipe assemblies.
    Mine was a lot worse if I left it pointing up-hill!
     
  5. spock500

    spock500 Hardcore MB Enthusiast

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    Could be air but they usually start after a bit of cranking, if its the alarm gone wonky it would disable the fuel solenoid which is part of the IP --

    Best (and easiest) way to check is pulling the rubber bleed pipe to the filter off, its a push fit, then getting someone to crank it over -

    There is no other way to immobilise a diesel other than stopping the fuel, you can of course disable the glow plug but it will still start albeit lumpy.

    Also check pre-filters if vehicle has been standing for a bit.
     
  6. Dieselman

    Dieselman Banned

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    I take it this car has the later electronic key and ignition lock and that when the key is inserted it releases the steering lock and allows the engine to turn over.
    If so forget anything to do with the immobilizer as that is part of the ignition switch and must be working if the key works at all.

    It has to be air leaking in or the crank sensor gone. The CKP can be checked using a voltmeter connected to pin13 of the diag connector.
     
  7. jaymanek

    jaymanek Authorised Forum Sponsor Authorised Forum Sponsor

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    We had a similar issue which in the end turned out to be all five glow plugs dead!
     
  8. spock500

    spock500 Hardcore MB Enthusiast

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    Ok, going to go out on a limb here and say its one of (or both) of the pre-filters -

    Here's the theory;

    Car has been in a minor shunt dislodging gunk in the tank which has then been pumped into the filters, left to ferment for three weeks and bobs your uncle :)
     
  9. OP
    OP
    BIG Sean

    BIG Sean Hardcore MB Enthusiast

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    car was stood in scrap auction for over a month - transporter delivered got key a month or so later - it started and drove for a while then wouldn't after battery going flat.
     
  10. spock500

    spock500 Hardcore MB Enthusiast

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    Posted this on another thread, red spot is pre-filter on OM 605 so should be the same of 606


    [​IMG]

    Single 10mm bolt and the whole plastic holder comes out, here's mine :eek:

    [​IMG]
     

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