DIY: How to change ABC Accumulators

Discussion in 'Wheels, Tyres, Brakes & Suspension' started by alexanderfoti, Jan 18, 2015.

  1. alexanderfoti

    alexanderfoti Hardcore MB Enthusiast

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    Hi all

    I recently changed out all my ABC Accumulators on my 215 CL55 AMG.

    I made a guide, which should be pretty similair for all ABC equipped cars (230, 220, 215). The 230 will require more effort to get to the accumulators, but after that its the same.

    http://fotifixes.com/2015/01/18/how-...rcedes-cl-215/

    I hope it helps somebody!
     
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  2. mattk1

    mattk1 Hardcore MB Enthusiast

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    Really helpful and great guide.

    Thanks , Matt :thumb:
     
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  3. C43AMG

    C43AMG MB Club Veteran

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    How much of an improvement was there in the ride ? Many thanks for the write up, Peter
     
  4. OP
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    alexanderfoti

    alexanderfoti Hardcore MB Enthusiast

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    30/40%

    I think the remainder of the issue is down to the top mounts of the struts. The bushes have failed on mine completely, giving play as shown in this video:

    [YOUTUBE HD]J8cltwCHr7c[/YOUTUBE HD]

    Its about 10mm of play, on both sides. That cant be good for ride quality!

    Im going to use a 10mm sheet of rubber and make my own replacement bush as its not available from Mercedes (they want you to buy a whole new strut).

    This is easy done on the fronts, but the rear strut design is slightly different and cannot be repaired (or tested) in such an easy way. If they show the same play im going to replace the struts with some used ones.
     
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  5. C43AMG

    C43AMG MB Club Veteran

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    I will go and test mine. I have two new rear struts in the rear, so it will be interesting to see how my front bushes are.

    Please let us know how you get on and if there is any improvement. Many thanks,
     
    Last edited: Jan 21, 2015
  6. OP
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    alexanderfoti

    alexanderfoti Hardcore MB Enthusiast

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    Will do! Hoping the rears aren't shot.
     
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  7. C43AMG

    C43AMG MB Club Veteran

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    Just tested mine no movement what so ever. Solid :thumb: :thumb:
     
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  8. m2287

    m2287 Hardcore MB Enthusiast

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    There is another accumulator behind the drivers side front wheel also!
     
  9. OP
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    alexanderfoti

    alexanderfoti Hardcore MB Enthusiast

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    That is the pulsation damper. On mine I had replaced it 3 months ago. They make a loud humming noise that follows the revs when they fail.
     
  10. m2287

    m2287 Hardcore MB Enthusiast

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    Yea that's the one, they can also make the ABC warning light come on when you go over largish bumps, changing mine made the suspension a lot less "bouncier". It's definately something I'd do if I was changing the other three anyway!
     
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  11. OP
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    alexanderfoti

    alexanderfoti Hardcore MB Enthusiast

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    Lucky!!

    I have just finished putting my home made bushes in, lets see how the ride is, havent had a change to test drive it yet!
     
  12. MikeAMG

    MikeAMG Active Member

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    What caused the play? Did you take some pictures?
     
  13. OP
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    alexanderfoti

    alexanderfoti Hardcore MB Enthusiast

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    The play is caused when the top of the strut breaks free of its bonding with the rubber top mount, it looks like this:

    [​IMG]

    Mercedes do not sell this mount on its own, so repair would mean new struts (or the method I used).

    I did, I will be doing a write up guide shortly.
     
    Last edited: Jan 22, 2015
  14. MikeAMG

    MikeAMG Active Member

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    Surprised nobody makes a strut top mount.
     
  15. OP
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    alexanderfoti

    alexanderfoti Hardcore MB Enthusiast

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    I think most indy's and certainly dealers would just replace the strut, either with new, or second hand.

    Its also bonded to the top of the strut from the factory, so you would have to find a way to bond the new one onto the old strut.
     
    Last edited: Jan 22, 2015
  16. OP
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    alexanderfoti

    alexanderfoti Hardcore MB Enthusiast

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    2 people like this.
  17. OP
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    alexanderfoti

    alexanderfoti Hardcore MB Enthusiast

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    Checked today, no play on the rear shocks. So either im lucky, or they have been changed.

    I took my friends 2005 CL65 out for a drive today. It has the same wheels and same suspension as mine, however it has 40,000 miles. It drives exactly the same as mine, except mine is more crashy on the rear. Im going to do the rear subframe bushes which should have it sorted, then im leaving it alone (I promise!)

    On a side note, ******! that 65 is unbelievably torqey! It has an odd sound to it too, like a sewing machine ripping your face off, completely different drive to the v8.
     
  18. C43AMG

    C43AMG MB Club Veteran

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    A CL 65 a very rare beast.
     
  19. OP
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    alexanderfoti

    alexanderfoti Hardcore MB Enthusiast

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    Yes indeed, only 30 odd on the roads in the UK. An amazing machine!
     

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