Door lock button snafu - Mercedes-Benz Forum

 
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post #1 of 6 (permalink) Old 01-14-2012, 12:11 AM Thread Starter
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Door lock button snafu

Howdy folks,

My first post with some reservations. New individual and owner of a 86' 190D 2.5. Recently noticed that when I try to lock the doors from inside/outside utilizing the key, the right rear door lock button doesn't retrack but the other three do.
I must manually push down the door lock button in question to lock the door and silient the vacuum pump. As I attempt to unlock the car from inside/outside, the lock button does extend to unlock the right rear door lock.

Could there be a vacuum door lock check value leak or defective solenold? Any suggestions of a fix would be greatly appreciated.
I apologize if the above message seems confusing.

Regards,
Raymond
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post #2 of 6 (permalink) Old 01-14-2012, 02:34 AM
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sounds like the vacuum actuator in the door has failed.

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Last edited by Dusty`NZ; 01-14-2012 at 02:38 AM.
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post #3 of 6 (permalink) Old 01-14-2012, 12:04 PM
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Originally Posted by Dusty`NZ View Post
sounds like the vacuum actuator in the door has failed.
+1. Sounds like that's the problem.



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1989 Oldsmobile Cutlass Calais S - 123,000 miles
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post #4 of 6 (permalink) Old 01-14-2012, 02:39 PM
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I believe it's also possible that the vacuum hose itself may have a leak in it.

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post #5 of 6 (permalink) Old 01-15-2012, 10:29 AM Thread Starter
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Guys,

I appreciate the quick response to my inquiry. Question, does each door has its own vacuum actuator? If so, where in the door compartment will I locate it? Is it somehow attached to the solenoid?
I have a Haynes service & repair manual but I see no reference or picture of a vacuum actuator for the door.
Once again I thank you all for your time and effort in suggesting a possible fix.

Regards,
Raymond
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post #6 of 6 (permalink) Old 01-22-2012, 07:00 PM Thread Starter
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Door lock button snafu repaired

Guys,

First of all I want to thank you all for the input provided to reslove the problem I was having with the door lock button.
I removed the vacuum actuator (solenold) from the right rear door and replaced it with one that I got from pick & pull. All is well now with the replacement.

My concern is the vacuum/supply pump. It takes about one minute for it to shut off after I lock the doors either from within or utilizing the key. The sound is most noticeable (loudest) behind the fuel fill door. Is this normal? I'm concern that the battery will quickly drain after repeated use of the central locking system.
As I look through the Hayes manual I think the culprit is either the vacuum/suppy pump or the fuel tank flap actuating element. What do you guys think?

Possible solutions/advice as always is greatly appreciated.

Regards,
Raymond
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