Replacing coupe seat-back lock vacuum elements - Mercedes-Benz Forum
 
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post #1 of 7 (permalink) Old 12-30-2016, 11:46 AM Thread Starter
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Replacing coupe seat-back lock vacuum elements

Hello,

The vacuum elements in my passenger-side seat-back locking system will not hold vacuum. I've got a pair of new elements but I can't figure out how to remove the old ones. I've removed the two screws holding it to the seat frame, but how do I disconnect the element from the operating rod? I've attached the schematic for reference.

Thank you.
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post #2 of 7 (permalink) Old 12-31-2016, 07:58 PM
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IIRC, the operating rod stays with he element. Or at least take them both out together and then swap them. It's been a while...

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post #3 of 7 (permalink) Old 01-01-2017, 04:15 AM
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The rod attaches ether by threading into the socket on the vacuum actuator or by means of a clip that "wraps around" the rod at the actuator, such as what's used with the actuators in the central locking system.

I looked at the replacement part pictures and the rod is not included (as you found as well) so it must come off somehow.

I'm betting it screws into the actuator.

Dan
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post #4 of 7 (permalink) Old 02-04-2017, 03:50 PM Thread Starter
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For posterity:

The rods are attached to the vacuum elements with small e-clips that clip into a machined notch in the rods. I was able to pry the old e-clips off with an eyeglass screwdriver. Attaching the new elements was trickier. I made a tool by cutting a notch into the tip of a wooden chopstick.I then put a new e-clip into the notch firmly and used the chopstick to get it into the (very-tight) housing.
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post #5 of 7 (permalink) Old 02-04-2017, 04:55 PM
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Interesting. I've had those apart myself but it's easily been 10-12 years. I don't recall E clips, but then again, my memory's not what it used to be, either....

Thanks for the follow up!

Dan
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post #6 of 7 (permalink) Old 07-23-2017, 05:35 PM
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Where did you find the elements? I've been repairing the vacuum diaphragm with glue, but don't know the part number to be able to find them. '94 S500 Coupe. You're right about the eyeglass screwdriver on the clips; they are very small.
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post #7 of 7 (permalink) Old 07-25-2017, 02:11 PM
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Quote:
Originally Posted by ChrisP3 View Post
Where did you find the elements? I've been repairing the vacuum diaphragm with glue, but don't know the part number to be able to find them. '94 S500 Coupe. You're right about the eyeglass screwdriver on the clips; they are very small.
I could supply the part numbers for a 1982 coupe but don't think that would be much help to you...

You need to be in the 140 forum and hopefully the moderator will move this thread.
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