E-Class (W211) 2003-2009

Headrest motor issue

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Old Aug 28, 2023 | 06:24 PM
  #1  
Jeff Miller's Avatar
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From: Walden, NY
Porsche 987/Mertz E500 wagon
Headrest motor issue

My driver's headrest stopped working. I can hear a relay click under the seat when I hit the button. All other seat motor functions work. I pulled the motor out and tested it, it does spin when I apply an alt power source. Any idea what the next step should be?
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Old Aug 29, 2023 | 07:58 AM
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Check the headrest slides up/down with ease w/o the motor. Those motors cannot move anything with a lot of resistance.

Have you isolated the source of the click? Perhaps the gear mechanism is stuck? broken internally? dried lube?


Last edited by JCM_MB; Aug 29, 2023 at 08:03 AM.
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Old Aug 30, 2023 | 12:36 PM
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From: Walden, NY
Porsche 987/Mertz E500 wagon
It moves smoothly. The click is coming from under the seat-module I believe. Sounds the same as when I hit one of the other seat adjusting buttons, but nothing happens. The motor does not work when plugged in where it's supposed to be (I tried it loose, not attached to the gear assembly so that there would be no resistance)
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Old Sep 18, 2023 | 07:38 PM
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Still looking for help if anyone has any ideas?
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