W126 rear window won't go up - PeachParts Mercedes-Benz Forum

JoeB · #1 10-04-2004, 03:57 AM

One of the rear windows in my 1987 420 SEL won't go back up - I can hear the motor running, but the window stays down. And the glass rattles when I close the door, so I suspect the window has jumped off the track. I know there are others who have had this problem; can anyone send me the thread that explains what to do?

JoeB

sixto · #2 10-04-2004, 04:20 AM

Do a search on sliding jaw.

Sixto
95 S420
87 300SDL

jriewer · #3 10-04-2004, 12:58 PM

Your going to have to remove the door panel to investigate regardless of the problem. Could be a mounting screw has rattled loose after all these years and now the gear teeth are not meshing properly due to bad alignment. If you hear that the motor is still working its will most likely be an easy fix.
Door panel removal takes about 5 minutes.

JoeB · #4 10-04-2004, 03:37 PM

Thanks for your help - the link to "sliding jaws" gave me all the info I need.

JoeB

wbain5280 · #5 10-05-2004, 12:17 AM

Save yourself some time and get a clevis pin and a keeper pin at the hardware store. This pin is similar to the rivet but is longer and has lots of holes along its length. Grind off the rivet to free the arm from the slider. Drill out the hole in the window arm so the new pin will fit and cut the pin to the proper length. Assemble the slider and the locking pin into the window mechanism.

This has the advantage of not having to remove the drive motor and arm and pound on the supplied MB rivet 200 times with a hammer.

I'll have to post some pics of my car.

sixto · #6 10-05-2004, 12:32 AM

That is the smartest thing I've read on this forum in a long time!

Sixto
95 S420
87 300SDL

Harold in NC · #7 10-05-2004, 10:42 AM

I used a welder:
How I Fixed My Plastic Window Slide

autozen · #8 10-05-2004, 10:55 AM

I use a welder too, but the clevis pin sounds smarter.

Peter

wbain5280 · #9 10-05-2004, 12:21 PM

Here's a pic.

unkl300d · #10 11-17-2009, 08:16 PM

wbain5280,

Thanks for the picture and great tip.

The universal clevis pin is also known as a Tine pin.
The keeper pin is also known as a Hitch pin.

I imagine one can also use a cotter pin.

I just bought the materials to do a fix. (1989 300SE right rear window)

My question is, did you use a 2/10 inch diameter clevis pin (with a 4/10" diam. base) or the 3/10 inch diamter one (with the 5/10" diam base)?
Do you recall whether you used a washer inside the nylon jaw or did you just use washers on the outside under the keeper pin?

Thanks.