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

Groaning noise when brake pedal is touched

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

  1. RobbieSadr

    RobbieSadr New Member

    Messages:
    6
    Likes Received:
    1
    Joined:
    Nov 4, 2016
    Location:
    Eynesbury, St Neots
    Your Mercedes:
    E240 2004 2.6l
    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

    Messages:
    11,351
    Likes Received:
    3,742
    Joined:
    Aug 25, 2006
    Location:
    Midlands / Charente-Maritime
    Your Mercedes:
    '93 500SL-32, '01 W210 Estate E240, 02 R230 SL500 (Malcolm Spec), 04 Smart Roadster Coupe
    Probably worn pads. Get it seen to ASAP.
     
  3. OP
    RobbieSadr

    RobbieSadr New Member

    Messages:
    6
    Likes Received:
    1
    Joined:
    Nov 4, 2016
    Location:
    Eynesbury, St Neots
    Your Mercedes:
    E240 2004 2.6l
    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

    Messages:
    12,944
    Likes Received:
    2,291
    Joined:
    Nov 15, 2013
    Location:
    Wirral
    Your Mercedes:
    W212 E63 ///AMG V8 Biturbo Volvo XC90 2018
  5. OP
    RobbieSadr

    RobbieSadr New Member

    Messages:
    6
    Likes Received:
    1
    Joined:
    Nov 4, 2016
    Location:
    Eynesbury, St Neots
    Your Mercedes:
    E240 2004 2.6l
    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 Moderator

    Messages:
    9,062
    Likes Received:
    492
    Joined:
    Mar 25, 2010
    Location:
    West London
    Your Mercedes:
    W221 S65 AMG - W204 C63 AMG
    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

    Messages:
    603
    Likes Received:
    10
    Joined:
    Feb 19, 2006
    Location:
    Nottingham
    Your Mercedes:
    W124/1994/E200, W220/2004/S320CDI, W205/2016/C200, W447/2017/3.0 CDI
    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

    Messages:
    1,120
    Likes Received:
    193
    Joined:
    Aug 8, 2010
    Location:
    Ruislip
    Your Mercedes:
    CL500 -W215, A140-W168
    No it’s before the wheels turn.
     
  9. John Laidlaw

    John Laidlaw Senior Member

    Messages:
    12,944
    Likes Received:
    2,291
    Joined:
    Nov 15, 2013
    Location:
    Wirral
    Your Mercedes:
    W212 E63 ///AMG V8 Biturbo Volvo XC90 2018
    Well remembered ! Completely forgot about the moaning and groaning my 230 made ( tried to forget a lot of things about it to be honest !)
     
    alexanderfoti likes this.
  10. LostKiwi

    LostKiwi Senior Member

    Messages:
    11,351
    Likes Received:
    3,742
    Joined:
    Aug 25, 2006
    Location:
    Midlands / Charente-Maritime
    Your Mercedes:
    '93 500SL-32, '01 W210 Estate E240, 02 R230 SL500 (Malcolm Spec), 04 Smart Roadster Coupe
    Funny enough I forgot too even though I've been it all day and it's driven me nuts!
     
    John Laidlaw likes this.
  11. Craiglxviii

    Craiglxviii Senior Member

    Messages:
    11,743
    Likes Received:
    1,918
    Joined:
    Sep 6, 2015
    Location:
    Cambs UK
    Your Mercedes:
    W215 CL500 Garage Queen; W211 E320 Avantgarde Estate Designo Edition
    Check the tyres. We had this... groaning grumbling noise turned out to be worn rubber.
     
  12. OP
    RobbieSadr

    RobbieSadr New Member

    Messages:
    6
    Likes Received:
    1
    Joined:
    Nov 4, 2016
    Location:
    Eynesbury, St Neots
    Your Mercedes:
    E240 2004 2.6l
    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 Moderator

    Messages:
    9,062
    Likes Received:
    492
    Joined:
    Mar 25, 2010
    Location:
    West London
    Your Mercedes:
    W221 S65 AMG - W204 C63 AMG
    Hello!

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

    RobbieSadr New Member

    Messages:
    6
    Likes Received:
    1
    Joined:
    Nov 4, 2016
    Location:
    Eynesbury, St Neots
    Your Mercedes:
    E240 2004 2.6l
    Thanks so much Alexander, just what I was hoping as nothing shows up as a fault.
    Cheers
    Robbie
     
  15. Naraic

    Naraic Moderator

    Messages:
    9,523
    Likes Received:
    428
    Joined:
    Mar 4, 2010
    Your Mercedes:
    2005 CL500.
    THE NOISE HAPPENS WHEN STATIONARY.
     
  16. Naraic

    Naraic Moderator

    Messages:
    9,523
    Likes Received:
    428
    Joined:
    Mar 4, 2010
    Your Mercedes:
    2005 CL500.
    When stationary?
     
  17. Craiglxviii

    Craiglxviii Senior Member

    Messages:
    11,743
    Likes Received:
    1,918
    Joined:
    Sep 6, 2015
    Location:
    Cambs UK
    Your Mercedes:
    W215 CL500 Garage Queen; W211 E320 Avantgarde Estate Designo Edition
    No, that was just the Mrs
     
  18. Naraic

    Naraic Moderator

    Messages:
    9,523
    Likes Received:
    428
    Joined:
    Mar 4, 2010
    Your Mercedes:
    2005 CL500.
    You wish!
     
  19. John Laidlaw

    John Laidlaw Senior Member

    Messages:
    12,944
    Likes Received:
    2,291
    Joined:
    Nov 15, 2013
    Location:
    Wirral
    Your Mercedes:
    W212 E63 ///AMG V8 Biturbo Volvo XC90 2018
    Groaning noise seems to come from my Mrs when I accelerate :p
     
  20. Craiglxviii

    Craiglxviii Senior Member

    Messages:
    11,743
    Likes Received:
    1,918
    Joined:
    Sep 6, 2015
    Location:
    Cambs UK
    Your Mercedes:
    W215 CL500 Garage Queen; W211 E320 Avantgarde Estate Designo Edition
    Oops I thought you said nagging.
     

Share This Page