GL Class (X164) 2007-2012: GL320CDI, GL420CDI, GL450, GL550

Brake wear warning light--any way to tell which brake's sensor?

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Old 05-29-2018, 04:42 PM
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'11 GL450
Brake wear warning light--any way to tell which brake's sensor?

My wife's '11 GL450 with ~77K on it has started sporadically throwing the "brake wear" indicator. Thing is, the brake at all four corners have plenty of pad material left--I changed them all myself about 15K ago, and a visual inspection through the wheel spokes confirms that none of the outboard pads are remotely close to being worn. (Yes, I realize that an inboard pad could have been worn.) I suspect a loose connection or a partially failing sensor. Is there any way to tell which sensor is throwing the code through the computer? If I'm going to have to pull each wheel to do a visual inspection, I might as well just preemptively replace the sensors, but if I can isolate the problematic sensor first, that would be great.
Old 05-29-2018, 06:46 PM
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1999 E300TD
If you have XDOS, then yes----otherwise its the ole FUYA approach!

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