S-Class (W221) 2007-2013: S 320 CDI, S 350, S 450, S 500, S 550, S 420 CDI, S 600

Popping noise/sensation when applying and releasing brake

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Old Aug 19, 2014 | 04:30 PM
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Zerocarpileup's Avatar
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From: Chicago, Illinois
2008 S63
Popping noise/sensation when applying and releasing brake

I have popping noises when I apply and release the brake while driving. It's not very loud but for sure noticeable under both the driver and passenger seat. I noticed this a few months back and now it seems to have gotten worse. Does any one know what this might be? Sometimes I notice the same noise when parked and I move in my seat a little. I don't weigh much so I can't imagine how my wight could reproduce this sound but it is the same popping sound.
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Old Aug 20, 2014 | 08:13 AM
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Zerocarpileup's Avatar
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From: Chicago, Illinois
2008 S63
Could this be it? (Responding to my own thread is awesome)

P-B-32.50/79 MAY09 All 216 & 221 vehicles equipped with Active Body Control (code 487). Knocking noise from under the floor area when driving over bumps or stationary, the hydraulic lines will be inspected for proper routing. They must not contact the body and must be free of tension.
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