W124 300D OM603 diesel pre filter

Discussion in 'Engine' started by krimat2005, Oct 15, 2011.

  1. krimat2005

    krimat2005 Active Member

    Messages:
    318
    Joined:
    May 31, 2009
    Location:
    Littlehampton, West Sussex
    Car:
    Mercedes W124 300D/ S203 220cdi
  2. JonathanC250

    JonathanC250 Active Member

    Messages:
    311
    Joined:
    Dec 11, 2008
    Location:
    Essex
    Car:
    2005 W203 C320 CDI
    The prefilter on a W124 300d is located on the fuel in hose located in the engine bay, if you look through the inlet manifold or underneath it, you should see it.

    This could have been removed though and just have a complete pipe.

    Regarding your picture, thats not what the prefilter looked like on our one, but it could be the original part.
     
    Last edited: Oct 15, 2011
  3. Dieselman

    Dieselman Banned

    Messages:
    34,206
    Joined:
    Jul 13, 2003
    Car:
    Peugeot 403 Convertible
    That could well be the pre-filter.
     
  4. 230K

    230K MB Enthusiast

    Messages:
    2,190
    Joined:
    Jun 1, 2003
    Location:
    Belfast
    Car:
    09 E320 cdi Sport Estate, 98 E300TD Estate, 99 SL 500
    Hi

    That certainly looks like your pre filter.

    230K
     
  5. OP
    OP
    krimat2005

    krimat2005 Active Member

    Messages:
    318
    Joined:
    May 31, 2009
    Location:
    Littlehampton, West Sussex
    Car:
    Mercedes W124 300D/ S203 220cdi
    hi again, just changed my pre filter, did put some diesel in it before install but it wasn't possible to fill it right up so left some air in it. started the engine after some cranking and it runs sweet, but there is still air in the pre-filter. is this ok? i've driven a car for about 10 mls after changing and all is good, just pre-filter it's not filled with diesel right up?? is this normal?
    thanks
     
  6. 230K

    230K MB Enthusiast

    Messages:
    2,190
    Joined:
    Jun 1, 2003
    Location:
    Belfast
    Car:
    09 E320 cdi Sport Estate, 98 E300TD Estate, 99 SL 500
    Hi

    Drive away at her and never worry, the pocket of air might shift at some stage but if it does or doesn't it won't cause you harm either way.

    230k
     
  7. compress ignite

    compress ignite Active Member

    Messages:
    208
    Joined:
    Jun 4, 2006
    Location:
    32 degrees North by 81 degrees West
    Car:
    '90 300D 2.5
    Yes ,that your Diesel pre-filter

    Or in Mercedes-Speak "Primary"

    The Bosch version is slightly more elegant,in that any nasty comtamination
    (Water/Fungus/Trash) is readily visible to the naked eye.

    [Image is ENLARGED, BEYOND actual size for display purposes.]
     

    Attached Files:

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.