W202 C200 Rear Headrest vacuum switch

Newtomerc

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The operating switch for the rear headrest 'drop down' has suddenly decided to give up the job. Is there any way I can manually drop the headrests as they impair my vision on reversing from my garage and it'll be some time before I can book the car in for investigation of the fault?
 

Dec

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Try continually holding the switch for 30 or more seconds.

Dec
 
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Newtomerc

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Dec, thank you for your prompt reply. I popped out and tried holding the switch down as suggested but with negative results. Is there anything else you think I should try? I would have thought MB would have provided some form of manual overide..........
 

television

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I have some details on this system, and I will come back to it
 

Dec

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Dec, thank you for your prompt reply. I popped out and tried holding the switch down as suggested but with negative results. Is there anything else you think I should try? I would have thought MB would have provided some form of manual overide..........

No that’s my only suggestion however mine don’t work on the first try after infrequent use but I have noticed that if I use them on a regular basis, the work fine so I put it down to loss of vacuum over time, hence my suggestion, play around a bit more with the switch when you are driving, maybe there is a fault so take note of what the rest of the lads are saying.

Dec
 

television

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For now I can send you a paper on removing them, I need an Email address
 

television

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Sent via Email
 
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Newtomerc

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Dec, since your last reply, each time I have gotten into the car and started the engine, I have held the switch down for a minute or two. Whilst driving, have touched the switch on numerous occasions; Results....ZILCH!
Today was the day I was due to visit my friendly MB dealership in Colchester for a solution to the problem. Guess what? On the way over to the workshop, I touched the switch and the resounding 'thump' of the headrests hitting the parcel shelf frightened the s**t out of me. I set up the headrests three times en route and they fell down at the first touch of the switch.On the final successful attempt, I turned the car round and went back home.......no doubt saving myself a hundred quid. Some gremlin residing under the back seats must be taking the p**s!
 

Dec

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Try continually holding the switch for 30 or more seconds.

Dec

Sorry for my misinformation, what I should have said above was to repeat touch the switch for 30 seconds, each touch triggers what sounds like a relay, tried my own after my last post and again had the same problem as yourself but I cured it in the same way and the now works ok again. Thanks for the feed back.

Dec
 

Myros

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Well what goes around comes around

Guess what I'll be pressing repeatedly on the way home tonight. I had given up trying to get them down and got used to them being pointing skywards all the time. Lets hope it works for me too.
 

Dec

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It might be something to do with the motion/vibration of the car, I find if you don’t use them regularly, the don’t work, if you do use them regularly, the do work fine, very odd.

Dec
 


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