Brake bleeding URGENT HELP

Discussion in 'AMG Lounge' started by FateSynchro, Sep 16, 2017.

  1. FateSynchro

    FateSynchro Hardcore MB Enthusiast

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    Hi,

    Right e63 W212, I have had my callipers off to be powder coated and I blocked the brake lines.
    However over the week I've been away at work one of the blanks has come out and the entire system has been bled dry.
    So I fitted callipers and filled with fluid, I then set about bleeding them in the old usual way one person pushes the pedal the other operated the bleed nipple.
    After doing this I couldn't get any pressure in the rear callipers, pistons haven't budged, and the pedle doesn't push down any fluid out the rears.
    Fronts have bled up fine, I then tried an pressure bleeder..
    So fluid coming out of all 4 corners steady stream, yet the rear callipers will not work, it's as though there's something on the brake pedal stopping it.
    It's half way solid and even removing the nipple completely achieves no fluid motion with the brake pedal at the rear.
    Pressure bleeder, fluid.. Manual nope.

    So I'm stuck, anyone shed some light? Do I need a mb star?
    I'm seriously confused on how it's not working as I recently flushed the fluid out before a track day using the old method and I got fluid movement.
    It's definitely something related to the system being dry.
     
  2. Alex

    Alex Hardcore MB Enthusiast

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    How are you bleeding - one at a time with the opposite caliper to the master cylinder first? Have you checked the caliper to see if it's got blocked? If you have an air comressor, you can blow through it.
     
  3. bluestreak

    bluestreak Hardcore MB Enthusiast

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    On electronic brake system pressure is distributed by a computer via ABS module or whatever this device is called on Mercs. When this device loses fluid it is not easy to re-introduce it, when you think you may need Star - you are probably right. Logic dictates that computer has to actuate the device to get air out correctly.
     
    optimusprime likes this.
  4. optimusprime

    optimusprime Hardcore MB Enthusiast

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    So hard to get the fluid in to the rears after all the fluid is lost , and air moves in .
     
  5. OP
    OP
    FateSynchro

    FateSynchro Hardcore MB Enthusiast

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    Thanks for the help guys, looks like the ABS pump needs to be operated in order to remove the air, my friend has a Snap On Solus machine.
    Do you think that will work? im just trying to avoid MB until the last possible second, just the cars on my 2 poster and i dont want to drive it anywhere, i could tow it but its just a logistical nightmare, im not trying to avoid paying money to MB or a specialist, i just didnt expect one of my Bungs to drop out and cause me this grief haha!

    i was temped to buy a STAR device but at £800-£1200 it really isnt worth my investment, if anyone knows of any tools (electronic) that will work i'll be happy to purchase one.
     
  6. optimusprime

    optimusprime Hardcore MB Enthusiast

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    Star wont help you .It will only tell you what the problem is , not how to fix it .
     
  7. optimusprime

    optimusprime Hardcore MB Enthusiast

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    If you dont have the ABS scan tool . Take the car out on the road use the brakes and then this will cycle the old fluid in to the abs pump .This is if you have brakes that work on the front .Be very carefull driving with 50% braking system missing . Then bleed normal from the left rear to the right rear and so on .You might find that you will need to do it a few times .But it is possible.. Or contact the dealer and ask what the next step is, after you replaced the abs pump, with a new one ..
     
  8. OP
    OP
    FateSynchro

    FateSynchro Hardcore MB Enthusiast

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    I need the Star or Diagnostic equivilant to operate the ABS pump and remove the air from that.
     
  9. optimusprime

    optimusprime Hardcore MB Enthusiast

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    Yes i do understand now, reading up on the problem . Read my post about driving it on the road to cycle the abs pump. Or do it the safe way and get the electronic cycling system ,thats if you can .
     
  10. bob6600

    bob6600 MB Club Veteran

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    £800-£1200?

    Unless it was genuine (which I doubt) you have been looking in the wrong place
     
  11. Druk

    Druk Administrator Staff Member

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    OP's problem is the same as mine except when I changed my rear calipers and emptied the system (because I changed the flexies at the same time) the ONLY way I could get fluid to the rears was a manual 'old fashioned' bleed with one guy on the pedal and me on the bleed nipples. An expensive Sealey pressure bleeder didn't work at all.


    .
     
  12. Abb

    Abb Hardcore MB Enthusiast

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    Give Chris a call at MB Darlington on 01325 467222, explain to him what you need (ie star) and see if he can help you out. He lives in Ingleby so am sure if he can help you out, he will do. The guy that answers the phone is called George, perhaps tell him I have told you to contact him and that you need to speak to Chris.
     
  13. OP
    OP
    FateSynchro

    FateSynchro Hardcore MB Enthusiast

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    Thank you all for the replies...

    I work away monday to friday so will try the Solus Edge on Friday from my mate who has a garage over the road from my unit, and then barring that i'll ring Chris.
    I might give him a bell today just as a heads up.

    As for the MB Star, could you possibly PM me with one that maybe isnt costing so much?
     
  14. ExMercTech

    ExMercTech Hardcore MB Enthusiast

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    If you have breakdown cover

    Get it recovered to a garage at least to a Merc Indy.

    If you hit anything whilst trying to cycle the ABS pump would the insurance pay out.
    Because in theory your driving a defective vehicle.
     
  15. zenman63

    zenman63 Hardcore MB Enthusiast

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    I have let all the fluid out a few cars including Mercedes with abs and always get fluid out all 4 callipers regardless of the abs.
    Star will cycle the pump no problem there but I doubt thats your problem, try undoing the flex hose on the rears again, did you take the flex off or just spin the callipers off?
    Sounds more like a blocked bleed hole.
    The flex go to a mount on the body where it meets the bundy pipe, undo it there.
     
  16. optimusprime

    optimusprime Hardcore MB Enthusiast

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    How do you have front brakes and no rears ? You start at the one on the right rear .So if the rear did not bleed why did you go on to the fronts? Some brake fluid tanks have two compartments if only one is filled your system wont bleed all all 4 points only two of them ..
     

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