Clunk from drivetrain when slowing down...any ideas ?

Discussion in 'Engine' started by vijilants, Aug 11, 2008.

  1. vijilants

    vijilants Hardcore MB Enthusiast

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    Hi Folks,

    On my W202 C230k Auto, when slowing down to a halt or slowing down to take a speed hump, I am getting a clunk sound and it sounds like it is coming from the gearbox / propshaft area. It has that feeling as though there is some play occuring in some area.

    I doesn't happen every time, but 70% of the time, especially notoceable when the car is still cold.

    Any ideas ?
     
  2. Will

    Will MB Club Veteran

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    It's probably one of the propshaft couplings.

    I had this on my old C230K, at around 80K miles.

    The old coupling was well and truly shot - you could wiggle the holes in the rubber where the bolts go through about 1/2" side to side.

    Basically, as the box changes down from 2nd to 1st (or maybe 3rd to 2nd), the slack in the drivertrain causes the clunk.

    Get it checked out on a ramp - from memory the couplings are fairly cheap - something like £20-40.

    Fitting is straightforward, just about 1/2 dozen bolts.

    Will
     
  3. grober

    grober MB Club Veteran

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    Propshaft U'J's , centre bearing/mounting, differential mountings, rear subframe front mounts,worn differential, engine / gearbox mounts probably in that order.
     
  4. OP
    OP
    vijilants

    vijilants Hardcore MB Enthusiast

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    Front - A210 410 1115 - 100.99
    Rear - A170 410 0015 - £81.96

    Thats with 10% discount :eek::eek::eek:
     
  5. Dec

    Dec Hardcore MB Enthusiast

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  6. Adam230K

    Adam230K Hardcore MB Enthusiast

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    i think the couplings are about £90, i bought them for mine (invain) and returned them
     
  7. Will

    Will MB Club Veteran

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    Maybe MB have increased their prices recently? I certainly don't remember paying £100!

    FWIW, one of my 190s had a new propshaft coupling a few weeks back, that was about £40ish from memory for the part.

    Will
     
  8. Adam230K

    Adam230K Hardcore MB Enthusiast

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    Desilva, Check which joint it is, when i recieved the second hand diff, i got a free propshaft coupling. if u need it let me know.
     
  9. Dieselman

    Dieselman Banned

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    Is your car all sorted now Rage. Did you go for the same ratio diff or an upgrade.?
     
  10. Adam230K

    Adam230K Hardcore MB Enthusiast

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    same ratio, and yeah its all sorted, thanks for asking.
     
  11. OP
    OP
    vijilants

    vijilants Hardcore MB Enthusiast

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    Conclusion

    Yep Will, you were right - turned out to be the coupling. Replaced and all OK now. :)

    Rage thanks for your offer, but I decided to fit a new one.
     
  12. Will

    Will MB Club Veteran

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    Hi Vij,

    Nice one - it should drive noticably better now when slowing down.

    Out of interest, do you know which coupling it was that had gone - front or rear?

    Did the part still cost £80-100ish?

    Will
     
  13. jaymanek

    jaymanek Authorised Forum Sponsor Authorised Forum Sponsor

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    Buy it from Euro, they arent expensive and you get OEM german parts.
     
  14. OP
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    vijilants

    vijilants Hardcore MB Enthusiast

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    Hi Will,

    It was the front one and the part cost £100. Its now coming to a halt as it should.....super smooth.

    Jay....I got it done by MB so didn't have to use use Euros.

    Reason why MB did it is because it was covered under a warranty that I have on the car.
     

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