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Brake pad wear, front or rear?

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E-Class (W211) 2003-2009

Brake pad wear, front or rear?

Old 01-10-2019, 01:07 PM
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Brake pad wear, front or rear?

Is there a way to find which brakes are throwing the "Brake Pad Wear" message with DAS?
I tried several ways yesterday but no success. Rear brakes last twice as long as the front ones but I would like to know for sure before I buy pads and rotors.
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Old 01-10-2019, 05:37 PM
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Why can't you just literally look at the brakes? Its easy to see brake pads through the wheels.
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Old 01-11-2019, 08:52 AM
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Yes, I can look at the brakes. I am curious, the pad wear is registered as a flag in the system, apparently the sensors are wired in the driver SAM however I went through all the SAM's but I could not find the pad sensors.
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Old 01-11-2019, 04:04 PM
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You can also measure the rotors, sometimes they're thick enough. I got away with just slapping a set of pads on mine without doing the rotors.
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Old 01-11-2019, 04:13 PM
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I did that 4 years ago on the rear brakes. I am looking at some serious hammering/torching/WD40ing to remove the rear rotors, the problem is that the rear pads appear to be in order and the front pads are new..
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Old 01-11-2019, 04:17 PM
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Well if the fronts are new, then it's probably the rears. On my rears, the most worn pad was the one with the sensor on it. The outside pad look like it was only half gone, the inside less than 1/4.
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Old 01-12-2019, 10:55 AM
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Usually people only change the front pads. U should definitley change the rear
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