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1997 SL-500; 2002 ML 500 sold; 1999 ML 320 sold; 2003 E 500 Sport sold
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240 Posts
Discussion Starter · #1 ·
I recently replaced my rear rotors and pads on my 1997 SL, they were making a high pitched squeel at low pedal pressure during stop and go traffic driving. The calipers seemed fine according to my Indy . He used standard MB pads but the noise is still there at low pedal pressure, the car stops well and there is no noise at all on harder braking. I had the pads de glazed and this did not help, today we are replacing the pads again.. At one time I owned a 2002 ML-500 and the brakes howled from the time I took it out of the new showroom until the day I got fed up with it and traded it on an E 500 which hasn't had those problems. Is there an inherent brake problem with models using the 5 litre engine ,,,any ideas on what this might be if the pad change doesn't work. Thanks
 

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07 SL350, 14 BMW320, 05 SLK and 4.6 MGBV8
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745 Posts
Brake squeel is the noise produced from the pads vibrating at a high frequency.
The first thing to do is put some grease between the piston and pad - copper slip or specialised grease made by the likes of Mintex.
If this fails, then 3M do a rubberised shim which may cure it.
It is not necessarily the pads vibrating between the piston and disc - if the pads are a tad sloppy in their housing, this too can cause the squeel. It is here where the 3M shims work well.
 

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1999 SL500
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89 Posts
Dale,

Let him know that you will have to take it to Totally German on Main if he can't quite the brakes down. He used to work there before he opened his shop and may be a bit more motivation to make you happy.
As stated in previous post the squeel is the vibration.
 

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Registered
1997 SL-500; 2002 ML 500 sold; 1999 ML 320 sold; 2003 E 500 Sport sold
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240 Posts
Discussion Starter · #4 ·
Thanks Mitchell...They seem to have gotten it right this time, they replaced the pads and used some paste on the piston and pads. You know what surprized me was how easy it is to replace pads on these cars, I have done pads on GM's but this is a cakewalk ! Cheers, off to Calgary this weekend so the SL will get a 1500 mile run..looking forward to it ..See you next fall for coffee !!
 
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