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

Hot back wheel even after MOT pass!

Discussion in 'Suspension, Steering & Brakes' started by nufc1975, Feb 13, 2018.

  1. nufc1975

    nufc1975 Member

    Messages:
    17
    Likes Received:
    0
    Joined:
    Feb 13, 2018
    Your Mercedes:
    C220 Sport Estate 2008
    Hi all,

    I had an issue last week where my back driver side wheel was red hot after a drive. Real hot metal smell + some smoke from behind disc. Car was going in for a service/MOT anyway so I had garage look at that.

    Fault found - brake disc showed signs of heating, plus pads were cracked. Cause was handbrake not releasing properly on that side. All shoes & pads replaced plus sensor. Calipers cleaned etc. Mechanic said disc itself was fine to keep so I did.

    MOT passed with no advisories or anything.

    Drove car home...and...same heat from same wheel.

    1) is it fair enough just to hand car back to garage & they'll take another look?
    2) anyone got any better advice or ideas?

    Seems really odd that it could pass an MOT but I'm no expert!!
     
  2. mikestrivens

    mikestrivens Senior Member

    Messages:
    2,715
    Likes Received:
    143
    Joined:
    Nov 21, 2008
    Location:
    Stockport
    Your Mercedes:
    1995 W124 320TE, 1998 R129 SL500, 2016 Triumph Tiger 800 XCx
    Parking brake doesn't work on calipers or disk. I wonder if they knew what they were doing.
     
    stwat likes this.
  3. OP
    nufc1975

    nufc1975 Member

    Messages:
    17
    Likes Received:
    0
    Joined:
    Feb 13, 2018
    Your Mercedes:
    C220 Sport Estate 2008
    ...well that's a worry. Invoice says:

    Rear brake pads
    Brake Pad Sensor
    Brake Shoe Kit
    Hand Brake Shoes

    Mechanic said handbrake wasn't releasing properly on the affected side leading to that damage.
     
  4. LostKiwi

    LostKiwi Senior Member

    Messages:
    11,324
    Likes Received:
    3,696
    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
    Does sound odd. Parking brake works on a drum brake internal to the rear disc. No way the hand brake will influence the disc pads.
     
  5. OP
    nufc1975

    nufc1975 Member

    Messages:
    17
    Likes Received:
    0
    Joined:
    Feb 13, 2018
    Your Mercedes:
    C220 Sport Estate 2008
    Odd bit for me is the MOT pass straight afterwards. Should I go straight back to em or would you advise caution? Paid £450 for full service, MOT plus that work so keen to get it resolved.

    I saw the brake disc myself - it was obviously damaged. Edge was burned red.
     
  6. mikestrivens

    mikestrivens Senior Member

    Messages:
    2,715
    Likes Received:
    143
    Joined:
    Nov 21, 2008
    Location:
    Stockport
    Your Mercedes:
    1995 W124 320TE, 1998 R129 SL500, 2016 Triumph Tiger 800 XCx
    Was this a Mercedes garage or Mercedes specialist indie or a back street chop shop?

    It would help if you put your general location in the CP so we can make recommendations.
     
  7. OP
    nufc1975

    nufc1975 Member

    Messages:
    17
    Likes Received:
    0
    Joined:
    Feb 13, 2018
    Your Mercedes:
    C220 Sport Estate 2008
    Newcastle upon Tyne.

    Was a decent standard dealer - not a Merc garage but they do sell premium cars. I bought the car from them 2 years back.
     
  8. malcolm210

    malcolm210 Senior Member

    Messages:
    2,817
    Likes Received:
    180
    Joined:
    Aug 21, 2005
    Does sound like a caliper piston sticking, that would be first on my check list, should be easy enough to see what’s binding, take it back and get them to check it
     
  9. LostKiwi

    LostKiwi Senior Member

    Messages:
    11,324
    Likes Received:
    3,696
    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
    I'd agree with Malcolm. Definitely sounds more like a sticking caliper than handbrake issues.
     
  10. XJ600

    XJ600 Member

    Messages:
    24
    Likes Received:
    5
    Joined:
    Feb 8, 2018
    Location:
    Kentshire
    Your Mercedes:
    2011 S204 220CDI Sport Auto
    Park brake cable part seized ?? That's if you use it.
     
  11. LostKiwi

    LostKiwi Senior Member

    Messages:
    11,324
    Likes Received:
    3,696
    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
    Discs are nothing to do with parking brake. It's a separate drum brake in the hub.
     
  12. mioba

    mioba Senior Member

    Messages:
    602
    Likes Received:
    9
    Joined:
    Feb 19, 2006
    Location:
    Nottingham
    Your Mercedes:
    W124/1994/E200, W220/2004/S320CDI, W205/2016/C200, W447/2017/3.0 CDI
    Sounds very much like a stuck calliper. Might be easier to call the RAC or AA if your a member and get them to do it in your drive. It's about a 30 min job.
    I had the same on my VW bus years ago. The heat will dissipate into the tyre so be carful with the tyre pressure.
    I would be certainly more peeved at misdiagnosis and associated costs.
    Let us know how you get on.

    Seems like they have repaired the affect rather than the cause.
     
  13. Ken_R

    Ken_R Senior Member

    Messages:
    539
    Likes Received:
    130
    Joined:
    Dec 11, 2015
    Location:
    Worcestershire, UK
    Your Mercedes:
    W203 2006 C230 Estate
    Double post. The Forum took ages to accept the posting.
     
  14. Ken_R

    Ken_R Senior Member

    Messages:
    539
    Likes Received:
    130
    Joined:
    Dec 11, 2015
    Location:
    Worcestershire, UK
    Your Mercedes:
    W203 2006 C230 Estate
    Not so sure about that. Discs are designed to take high temperatures, within limits. Under exceptionally heaving braking they can indeed 'turn red'. It is what they are designed for. Providing it doesn't result in any distortion or cracking, then it should be fine.

    There is a conflict here as my understanding is that the Service Brakes are pads (held by calipers) and discs. Whereas the Parking Brake mechanism is brake shoes acting on an [inboard drum]. I'll stand to be corrected.

    My thoughts would be that if the handbrake - shoes + drum, were binding sufficiently as to heat the Disc, by conduction, to an extent that such heating was visibly present [at the Disc] then the wheel bearing would also have been subject to such conditions and be at the verge of failure.

    I'm inclined to think that the issue has been mis-diagnosed and you have paid for items that didn't actually need replacing, albeit that the Handbrake linkage was probably in need of lubrication anyway.

    Were you given the original items as 'evidence' that they had been changed/needed replacing?
     
  15. star

    star Forum Supporter Authorised Forum Supporter

    Messages:
    4,638
    Likes Received:
    183
    Joined:
    Oct 6, 2004
    Location:
    Reading
    Your Mercedes:
    Smart + others :)
    The "drum" part of the handbrake forms part of the disc, so the heat from a sticking shoe will transfer thru out the discs.
     
    mikestrivens likes this.
  16. OP
    nufc1975

    nufc1975 Member

    Messages:
    17
    Likes Received:
    0
    Joined:
    Feb 13, 2018
    Your Mercedes:
    C220 Sport Estate 2008
    Hi - update here.

    Took car back in & was fine (meaning cold wheel) on drive back in. Garage checked it - they'd apparently checked the piston already - and took it for test drive. Car was ok.

    They claimed that after the handbrake fix, that they had fitted the replacement part a little too tight maybe & when it 'bedded in' it may have rubbed. So they adjusted slightly.

    Car run fine on drive home last night form garage & was ok this morning.
     
  17. Craiglxviii

    Craiglxviii Senior Member

    Messages:
    11,718
    Likes Received:
    1,902
    Joined:
    Sep 6, 2015
    Location:
    Cambs UK
    Your Mercedes:
    W215 CL500 Garage Queen; W211 E320 Avantgarde Estate Designo Edition
    So they didn’t do the job right the first time.
     
  18. XJ600

    XJ600 Member

    Messages:
    24
    Likes Received:
    5
    Joined:
    Feb 8, 2018
    Location:
    Kentshire
    Your Mercedes:
    2011 S204 220CDI Sport Auto
    The park brake drum is part of the disc.
     
  19. EmilysDad

    EmilysDad Senior Member

    Messages:
    5,823
    Likes Received:
    445
    Joined:
    May 8, 2012
    Location:
    Bury Lancs
    Your Mercedes:
    R320 2007
    But as LK says, the two braking systems are completely separate.
     
  20. OP
    nufc1975

    nufc1975 Member

    Messages:
    17
    Likes Received:
    0
    Joined:
    Feb 13, 2018
    Your Mercedes:
    C220 Sport Estate 2008
    That is my conclusion. They even had the cheek to tell me that the work on the second day was free of charge...
     

Share This Page