Scratching sound from brakes

[VenomX]

Hi guys.
Have a C240 2002 with about 39K on the clock.

When turning left I hear a scratching sort of noise, coming from the front left, it subsides immediately if I apply the brakes ( even lightly ) Can only hear it when windows are down
The discs have never been replaced in 23 years but the pads have about 10 months ago ( brembos )

Any ideas ? I am thinking the discs are old and need to be replaced
I will get the car in the air when I get a chance and see if I can see anything off such as uneven pad wear or dry sliders
Tracking needs to be done as I have done a lot of suspension work on the car including control arms/track rod end/struts

Thanks

 

[W1ghty]

Hi guys.
Have a C240 2002 with about 39K on the clock.

When turning left I hear a scratching sort of noise, coming from the front left, it subsides immediately if I apply the brakes ( even lightly ) Can only hear it when windows are down
The discs have never been replaced in 23 years but the pads have about 10 months ago ( brembos )

Any ideas ? I am thinking the discs are old and need to be replaced
I will get the car in the air when I get a chance and see if I can see anything off such as uneven pad wear or dry sliders
Tracking needs to be done as I have done a lot of suspension work on the car including control arms/track rod end/struts

Thanks

Might well be something stuck in the pads ?
The C class platform does have an issue with the foot brake cable running front to back that breaks a clip in the underneath centre of the car and allows the cable to contact the prop shaft , so if it’s not the brakes bear this in mind .

 

[Tonye]

Could be just a chunk of grit stuck behind the back plate, happened to a mate of mine, got so hot it welded itself to the plate.

 

[W1ghty]

S

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[W1ghty]

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Hello, I have recently purchased a used CLK 200 Kompressor Cabriolet (2009). It has around 69k miles. A road speed related scrapping/rubbing noise (bit like a wheel bearing) has started emanating from, I believe, the front of the transmission tunnel. I’ve read about park brake cable clips breaking leading to the cable rubbing on the prop and from other peoples descriptions it sounds identical to my noise ,however, one thing that is throwing me is it gets louder when everything warms up after a few miles and then has a consistent noise that varies with road speed. Obviously I’m trying to...

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[Trickythemerc]

The turning left confirms that it will be the park brake cable hitting the prop shaft. I have a clip available for the price of a pint.

 

[VenomX]

Thanks guys I will have a look when I get a chance .
If it subsides when I apply the brake lightly, could it still indicate the prop ? I have read a few threads regarding that and people tend to say the noise comes from the centre of the car, whereas when I hear it, it is definitely only the front passenger side with the window down.

What I will do to rule out the brakes I will jack the car up, and spin the wheels at the front to hear if the sound is present when the prop isn't spinning

 

[VenomX]

Right.
I have checked the propshaft/handbrake cable situation. Behind the transmission sump I can see three blue clips, all holding the handbrake cable in place securely, so that looks fine.
I have replaced pads and discs, noise still there.

Upon inspection, there is a tiny bit of play 12 and 6 when rocking the wheel, but not in any other directions ( I think it is the other control arm that I have not replaced yet causing this )
Not sure if it could be bearing related? It stops " scratching " when applying the brake. And does not sound like a growling noise that a bad bearing usually would.

Any suggestions welcome, thanks.

BTW the tracking will be out by a fair bit due to all the work I've done on it, getting round to that this week ( car drives straight and does not pull )

 

[slade1]

Small stones/grit in brake calliper? Also wheel bearings need adjustment.