1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

ML320 W164 injector return line clip removal

Discussion in 'Engine, Drivetrain, Fuel and Exhaust' started by flymech1, Oct 16, 2013.

  1. flymech1

    flymech1 Member

    Messages:
    11
    Likes Received:
    0
    Joined:
    Oct 16, 2013
    Location:
    Newcastle Upon Tyne
    Your Mercedes:
    ML320 CDI W164
    Hi all,

    I would like to have introduced myself before posting but I'm in the middle of a DIY and I could do with a little help!

    My ML320 W164 has had a leaking injector for a while and I've finally got around to making a start on fixing it... However, the simplest of things has stopped me in my tracks! :Oops:

    There is a small, circular, black plastic clip that is free to rotate, holding the fuel return line onto the injector head and for the life of me I can't figure out how to remove it! I've pushed, pulled and squeezed but don't want to use too much force for fear of snapping it. Can anyone advise on how these damn things come off?!

    Cheers,

    Glen
     

    Attached Files:

  2. mersum1es

    mersum1es Senior Member

    Messages:
    1,723
    Likes Received:
    114
    Joined:
    Sep 25, 2010
    Location:
    Finland
    Your Mercedes:
    W219/-07/320CDI, W220/-01/320CDI, EX:W211/-04/320CDI, EX:W210/-01/270CDI
    These are my translation from finnish forum: There should be 'locking ring' which should be lifted about 10mm. If the ring is not coming upwards, rotating the ring may help. Then is should release the connector. Pushing/pulling the connector at the same time may help too. There is certain position when connector is released. Here is pic of the connetor: https://dl.dropboxusercontent.com/u/3111796/Nipan_kuva.JPG
     
  3. OP
    flymech1

    flymech1 Member

    Messages:
    11
    Likes Received:
    0
    Joined:
    Oct 16, 2013
    Location:
    Newcastle Upon Tyne
    Your Mercedes:
    ML320 CDI W164
    Thanks Mersum1es! It was a good enough translation for me to understand 100% and the photo was great in confirming it. It's great to see it off as now I know how it actually locks on.

    I was struggling to remove the lock rings from the clean injector heads, god knows how I'm going to remove the one that has been covered in the 'black death'! It doesn't even rotate never mind lift 10mm... :shock:

    Cheers,

    Glen
     
  4. OP
    flymech1

    flymech1 Member

    Messages:
    11
    Likes Received:
    0
    Joined:
    Oct 16, 2013
    Location:
    Newcastle Upon Tyne
    Your Mercedes:
    ML320 CDI W164
    I don't suppose you (or anyone else) has the part number for this little black connector? Yeah you guessed it, I broke one! :( I managed to get all 3 off ok but when reconnecting the one that had been heavily contaminated with the 'black death' the locking ring snapped in half... The small rubber 'O' rings could do with being changed too!
     
  5. mersum1es

    mersum1es Senior Member

    Messages:
    1,723
    Likes Received:
    114
    Joined:
    Sep 25, 2010
    Location:
    Finland
    Your Mercedes:
    W219/-07/320CDI, W220/-01/320CDI, EX:W211/-04/320CDI, EX:W210/-01/270CDI
    At least in Finland You have to buy whole pipe assembly, typical for MB :x
    Couldn't find W164 parts, W211 320CDI part number is either A 6420703032
    replaced by: A 6420701932, or A 6420701332
    Taken from russian site

    O-ring size is about 3,0x1,45mm part number A 0000780580
     
    Last edited: Oct 18, 2013
  6. OP
    flymech1

    flymech1 Member

    Messages:
    11
    Likes Received:
    0
    Joined:
    Oct 16, 2013
    Location:
    Newcastle Upon Tyne
    Your Mercedes:
    ML320 CDI W164
    Excellent! I've really been struggling to find much info (parts lists, diagrams etc) for my ML320, Russian ones are better than none! I will continue to try and find somewhere to buy the connector by itself because I'll be in big trouble of the missus if I've gotta fork out for the full pipe assembly! :rolleyes:
     
  7. WG M-B

    WG M-B Senior Member Authorised Forum Supporter

    Messages:
    3,105
    Likes Received:
    5
    Joined:
    Dec 5, 2010
    Location:
    North west london
    Your Mercedes:
    C63 Wagon in black
    And they can be a little pita to clip back home fully!!!!!
     
  8. Nickslucky

    Nickslucky New Registration

    Messages:
    1
    Likes Received:
    0
    Joined:
    Dec 22, 2014
    Location:
    Hampshire
    Your Mercedes:
    CLS/2007/320
    Injector return line clip replacement

    So how do you clip them back securely? My number 1 cyl is leaking from the plastic return line clip following replacement of the injector. Many thanks.
     
  9. OP
    flymech1

    flymech1 Member

    Messages:
    11
    Likes Received:
    0
    Joined:
    Oct 16, 2013
    Location:
    Newcastle Upon Tyne
    Your Mercedes:
    ML320 CDI W164
    Hi there,

    I changed a leaking injector last year and from what I remember they push back on with the locking ring in the up position, then you have to push the locking ring back down to secure it. It's a very tight fit so requires quite a bit of force... Of course if your locking ring is old it will be more susceptible to snapping off, especially if you've had the dreaded black death around the area... I used a fat headed flat blade screwdriver and tapped each side bit by bit. It worked the first time but I had to take it back off and second time fitting I wasn't so lucky. I snapped the locking ring off but found a nicely fitting tie wrap that's done the job quite well in its place!

    If you have something that will put equal pressure on either side of the locking ring at the same time it would be safer to use that. Good luck and let us know how it goes!
     
    Last edited: Feb 21, 2015

Share This Page