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

Front end knocking.

Discussion in 'Suspension, Steering & Brakes' started by onefortheroad, Dec 6, 2018.

  1. onefortheroad

    onefortheroad Senior Member

    Messages:
    765
    Likes Received:
    142
    Joined:
    Dec 8, 2015
    Location:
    uk.
    Your Mercedes:
    E
    Up to date I've changed every front arm and ball joints in the hub, plus arb link arms .both front shocks and top mounts my knock still exists over small repeated bumps on uneven roads. It doesn't make a sound over speed bumps or bumps at speed. Which kinda tells me it may not be the arb bushes,Has anyone had issues with the top horse shoe shaped mounts and the end ball joint , can you remember the metallic rattle and what did you change to cure this. Thanks.

    2008 CLS w219.
     
  2. gassed up

    gassed up Active Member

    Messages:
    36
    Likes Received:
    13
    Joined:
    Jul 2, 2006
    Location:
    liverpool
    Your Mercedes:
    2011 C207 350CDI;2010 C207 350CDI sport;2010 SLK300;2004 C209 320;2000 C208 230K;
    I had a metallic rattle from the suspension on my C209 which had me stumped for about 3 years. Only found the cause when I stripped the rear suspension for a rebuild, transpired that the last 50mm of one of the springs had snapped off and was rattling in the spring pan. It couldn't be seen until the lower wishbone was removed.
     
    om613 likes this.
  3. Botus

    Botus Senior Member

    Messages:
    2,741
    Likes Received:
    456
    Joined:
    Jul 29, 2014
    Location:
    UK
    Your Mercedes:
    S500/2010/500
    what about the actual bushes holding the arm to the car? oddly true - most noises start here
     
  4. Uncle Benz

    Uncle Benz Senior Member

    Messages:
    2,376
    Likes Received:
    541
    Joined:
    Mar 31, 2006
    Location:
    West Sussex
    Your Mercedes:
    Mainly Mercedes
    You've probably replaced them, but the balljoints that the arb drop links attach to, the ones pressed into the arm, are notoriously difficult to diagnose.
     
  5. OP
    onefortheroad

    onefortheroad Senior Member

    Messages:
    765
    Likes Received:
    142
    Joined:
    Dec 8, 2015
    Location:
    uk.
    Your Mercedes:
    E
    I was going to detatch both arb links and drive it. If noise remains . its not them . looks like the bushes are bonded and you change the whole arb ..
     
  6. OP
    onefortheroad

    onefortheroad Senior Member

    Messages:
    765
    Likes Received:
    142
    Joined:
    Dec 8, 2015
    Location:
    uk.
    Your Mercedes:
    E
    Changed the whole arm. But thanks.
     
  7. OP
    onefortheroad

    onefortheroad Senior Member

    Messages:
    765
    Likes Received:
    142
    Joined:
    Dec 8, 2015
    Location:
    uk.
    Your Mercedes:
    E
    The only other thing is the strut track arm ball joints . maybe better off replacing the arms plus ball joints . if it stick knocks . its a vw tiguan on the drive !!!
     
  8. OP
    onefortheroad

    onefortheroad Senior Member

    Messages:
    765
    Likes Received:
    142
    Joined:
    Dec 8, 2015
    Location:
    uk.
    Your Mercedes:
    E
    Today I took both arb links off and the rumble sound is still audible. So I'm ruling out the arb bushes. I've ordered both sides upper mounts and will fit those and see if things improve. Last chance saloon .
     
  9. malcolm210

    malcolm210 Senior Member

    Messages:
    3,156
    Likes Received:
    340
    Joined:
    Aug 21, 2005
  10. OP
    onefortheroad

    onefortheroad Senior Member

    Messages:
    765
    Likes Received:
    142
    Joined:
    Dec 8, 2015
    Location:
    uk.
    Your Mercedes:
    E
    Unlikely , its more uneven ground that causes it. I can rev the engine and its fine.
     
  11. OP
    onefortheroad

    onefortheroad Senior Member

    Messages:
    765
    Likes Received:
    142
    Joined:
    Dec 8, 2015
    Location:
    uk.
    Your Mercedes:
    E
    Last edited: Dec 10, 2018
  12. Steve@Avantgarde

    Steve@Avantgarde Forum Supporter Authorised Forum Supporter

    Messages:
    6,695
    Likes Received:
    850
    Joined:
    Dec 8, 2009
    Location:
    Bristol/Somerset
    Your Mercedes:
    Mercedes-Benz C32AMG, SL55AMG, C320CDI Sport Edition Estate and SLR McLaren Coupe Roadster.
    Anti roll bar links and bushes? Usually cause the fault you describe.
     
  13. OP
    onefortheroad

    onefortheroad Senior Member

    Messages:
    765
    Likes Received:
    142
    Joined:
    Dec 8, 2015
    Location:
    uk.
    Your Mercedes:
    E
    ive disconnected front arb links and noises remain .
     
  14. Steve@Avantgarde

    Steve@Avantgarde Forum Supporter Authorised Forum Supporter

    Messages:
    6,695
    Likes Received:
    850
    Joined:
    Dec 8, 2009
    Location:
    Bristol/Somerset
    Your Mercedes:
    Mercedes-Benz C32AMG, SL55AMG, C320CDI Sport Edition Estate and SLR McLaren Coupe Roadster.
    Can only be the upper wishbone joints or possibly the bolts which go through the camber arms not set in the groves properly.
     
    onefortheroad likes this.
  15. OP
    onefortheroad

    onefortheroad Senior Member

    Messages:
    765
    Likes Received:
    142
    Joined:
    Dec 8, 2015
    Location:
    uk.
    Your Mercedes:
    E
    I've 2 wishbone arms on the way fitting this weekend . camber arm bolts are normal round ones set in middle position. I did pry at the bushes in the top wishbone arms and did see slop to a degree . I'll get em changed and see what's what , cars on 88k so they'll be tired I suppose.it sounds like a machine gun over uneven ground and is in time with bound and rebound
    Thanks for reply .
     
  16. OP
    onefortheroad

    onefortheroad Senior Member

    Messages:
    765
    Likes Received:
    142
    Joined:
    Dec 8, 2015
    Location:
    uk.
    Your Mercedes:
    E
    hello, has anyone here with access to wis , be able to check for the torque setting for the top nut that sits on the shock absorber for a 2008 w219 cls . thanks .
     

Share This Page