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Groaning noise when brake pedal is touched

Discussion in 'Suspension, Steering & Brakes' started by RobbieSadr, May 17, 2018.

  1. RobbieSadr

    RobbieSadr Member

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    Hi Guys,

    Can I have some clues as to what a groaning noise from my braking system is.
    It occurs when first starting and at other times when the brakes are used such as slowing down at roundabouts.
    Cheers
    Robbie
     
  2. LostKiwi

    LostKiwi Senior Member

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    Probably worn pads. Get it seen to ASAP.
     
  3. OP
    RobbieSadr

    RobbieSadr Member

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    The pads were changed a few days ago and the noise starts as the brake pedal is touched before the car moves. Where I park is tight for space so little chance of driving at any speed. I must admit it seems like an electrical issue rather than mechanical.
    Thanks for your response though.
     
  4. John Laidlaw

    John Laidlaw Senior Member

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  5. OP
    RobbieSadr

    RobbieSadr Member

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    Thanks John, the issue is that the noise starts when stationary as a slow groaning noise. Discs are in good condition. The noise seems to be from the braking system and as I had an ABS sensor replaced 10 days ago I wondered whether the ABS unit itself has some sort of pump/reservoir that is the root cause of the noise.
    Whatever it is I just hope it's not another expense...
    Cheers
    Rbbie
     
  6. alexanderfoti

    alexanderfoti MBO Forum Supporter Authorised Forum Supporter

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    IF its a 2004 E class its a W211
    W211 has SBC brakes that operatre on a brake by wire system.
    The groaning noise is the pump priming the system, it will do this when you first unlock the car, open the door, or repeatedly press the brake pedal .
     
  7. mioba

    mioba Senior Member

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    Could this not simply be new pads bedding in. Could be noticable now if the new pads are a different brand from what they replaced.
     
  8. Flyinspanner

    Flyinspanner Senior Member

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    No it’s before the wheels turn.
     
  9. John Laidlaw

    John Laidlaw Senior Member

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    Well remembered ! Completely forgot about the moaning and groaning my 230 made ( tried to forget a lot of things about it to be honest !)
     
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  10. LostKiwi

    LostKiwi Senior Member

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    Funny enough I forgot too even though I've been it all day and it's driven me nuts!
     
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  11. Craiglxviii

    Craiglxviii Senior Member

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    Check the tyres. We had this... groaning grumbling noise turned out to be worn rubber.
     
  12. OP
    RobbieSadr

    RobbieSadr Member

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    Hi Alexander, my question is whether it's a problem or something I have to put up with? I guessed it was something like you mention but needed confirmation.
    Should I go back to the garage or leave it as everything else on the car works fine?
    Thanks for your response which hit the spot!
     
  13. alexanderfoti

    alexanderfoti MBO Forum Supporter Authorised Forum Supporter

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    Hello!

    Not a problem, they all do that to varying degrees.
     
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  14. OP
    RobbieSadr

    RobbieSadr Member

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    Thanks so much Alexander, just what I was hoping as nothing shows up as a fault.
    Cheers
    Robbie
     
  15. Naraic

    Naraic Moderator

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    THE NOISE HAPPENS WHEN STATIONARY.
     
  16. Naraic

    Naraic Moderator

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    When stationary?
     
  17. Craiglxviii

    Craiglxviii Senior Member

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    No, that was just the Mrs
     
  18. Naraic

    Naraic Moderator

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    You wish!
     
  19. John Laidlaw

    John Laidlaw Senior Member

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    Groaning noise seems to come from my Mrs when I accelerate :p
     
  20. Craiglxviii

    Craiglxviii Senior Member

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    Oops I thought you said nagging.
     

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