S-Class (W220) 1999-2006: S 320 CDI, S 320, S430, S 500, S 600

New parktronic sensors still freaking out

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Old Jul 31, 2012 | 11:02 AM
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New parktronic sensors still freaking out

Howdy all,
I had one side of my rear parktronic giving false readings after sitting in the sun.

I replaced them with new sensors and get similar activity (not into the red/beep territory though) sun or shade.

Basically it goes up to 3 or 4 bars, and then disappears after a second or so. Still works (i.e. it won't fall below the other side), but sort of annoying.

Any ideas on why this may be happening?

Thanks
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Old Jul 31, 2012 | 12:22 PM
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I may be wrong, since I am talking in a Lexus point of view, but my sensors (the bullet hole) was painted incorrectly was one factor, I doubt thats your problem now. The main reason for my car's sensor going off was the control box that connected the 4 holes in the back to the control/monitoring unit. All I have for now sorry sir.
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Old Aug 1, 2012 | 09:20 AM
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I painted them myself, but did it like any other painting project.

Primer, color, clear. wonder if that was wrong.
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Old Aug 2, 2012 | 05:00 PM
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Oliver,
I have recently had this exact same experience with one of my front sensors.
It just randomly starts activating (beeping) but never at any substantial speeds....it only happens when I am creeping in and out of parking spaces or driving away from a traffic light.
The front sensor goes off even in reverse.....not sure what is happening.

Maybe just a bad parking sensor?
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Old Aug 2, 2012 | 11:19 PM
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same thing happening to me too
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Old Aug 3, 2012 | 08:55 AM
  #6  
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I'm gonna move my wonky sensors from one side to the other and see if the problem follows.

These things are brand new and should work perfectly, so all I can think is that i painted them poorly.
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Old Aug 5, 2012 | 08:26 PM
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I know I have read a TSB relating to this exact issue......
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Old Nov 30, 2012 | 06:08 AM
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was it a faulty sensor that was causing this issue? my car is doing the exact same thing
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Old Nov 30, 2012 | 04:40 PM
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never really messed with it since they just show phantom readings but don't usually beep. I have no clue what could be wrong since they are plug and play really.
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Old Nov 30, 2012 | 09:17 PM
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same problem here, not worth investigating whats wrong
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