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  #1  
Old 03-07-2005, 08:50 PM
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window failure

I'm sure this info is posted somewhere, but I couldn't find it. My rear driverside window will not go down. When I push the switch the window goes chunk chunk chunk like it wants to go down, but I won't. Any insites.

Thanks
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  #2  
Old 03-07-2005, 08:52 PM
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Quote:
Originally Posted by Biodiesel300TD
I'm sure this info is posted somewhere, but I couldn't find it. My rear driverside window will not go down. When I push the switch the window goes chunk chunk chunk like it wants to go down, but I won't. Any insites.

Thanks
Sounds like a worn out regulator....but you need to take the door panel off and get a better look.
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Old 03-07-2005, 08:52 PM
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Quote:
Originally Posted by Biodiesel300TD
I'm sure this info is posted somewhere, but I couldn't find it. My rear driverside window will not go down. When I push the switch the window goes chunk chunk chunk like it wants to go down, but I won't. Any insites.

Thanks
The rear door regulators are CRAP!! The weak frame casting bends after a while and allows the gear to come "un-meshed" with the motor. Not much you can do but take it out and try to bend back to useable shape. A good junkyard one (if you can find one) is a better bet.
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Old 03-07-2005, 09:32 PM
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I have found that a lot of the time its not nessecarily the window regulator. Oftentimes its as simple as that little white nylon bushing that connects the window sliding jaw to the regulator. Check those first. You will need to take off the door panel

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Old 03-08-2005, 08:11 AM
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Quote:
Originally Posted by JMan300sd
I have found that a lot of the time its not nessecarily the window regulator. Oftentimes its as simple as that little white nylon bushing that connects the window sliding jaw to the regulator. Check those first. You will need to take off the door panel

and if you do find it's one of these lovelies, I have a suggestion. Drill a 5/64" hole in the end of the pin and use a cotter to fasten it on. Worked great for me - beats trying to peen it over in the door or taking the regulator out to do it.
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Old 03-08-2005, 08:19 AM
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Quote:
Originally Posted by Pete Burton
and if you do find it's one of these lovelies, I have a suggestion. Drill a 5/64" hole in the end of the pin and use a cotter to fasten it on. Worked great for me - beats trying to peen it over in the door or taking the regulator out to do it.
The W116 uses the same kit....only it has a spring clip that holds it on. THere is a groove machined into it that the clip fits on.
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Old 03-08-2005, 08:27 AM
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Quote:
Originally Posted by boneheaddoctor
The W116 uses the same kit....only it has a spring clip that holds it on. THere is a groove machined into it that the clip fits on.
I wonder if the one for the 116 would really fit the 126. If it did, that would be the way to go.
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  #8  
Old 03-08-2005, 08:38 AM
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Quote:
Originally Posted by Pete Burton
I wonder if the one for the 116 would really fit the 126. If it did, that would be the way to go.
W116 regulators are not cheap.....or easy to find....they wear out pretty quick too I hear....
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Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
---------------------
Section 609 MVAC Certified
---------------------
"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche
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  #9  
Old 03-08-2005, 09:48 AM
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What I did with that little piece is I took out the regulator ( not that hard to do) and held the piece in a vice while holding the regulator where it connects and then using a pinbal hammer and flattening the metal of the bushing so that it prevents itself from falling out of the regulator. After inspecting ones already installed it seemed to me that that was how mercedes did it originally.
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  #10  
Old 03-08-2005, 10:04 AM
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either motor or regualtor....sounds like regulator...someone has already probably informed you of this tho.
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  #11  
Old 03-08-2005, 10:09 AM
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Has anyone ever tried to weld/reinforce a regulator? Mine failed at the top pulley last time. It looked as though the torque from the motor bent it. Is there a way to quickly spot weld a reinforcement strip to it?
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  #12  
Old 03-08-2005, 12:35 PM
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I have had to replace several and they fail because of poor quality materials and no limit switches on the up and down motion of the power window. Mine have always been made of a pot metal that cracks easily.

Last one cost $99 for the part plus labor. I don't know where he bought it because when I priced them, they were much higher.

Now that I have more time, the next one will be replaced by me with parts from the salvage yard. My next trip there will include a search for one or two of them to keep around for next time one breaks. So far, they have all been on the drivers door.
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Old 03-08-2005, 01:18 PM
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On my 95 E320 the driver's reg went-the final few teeth at the top broke off! So if the window was a couple of inches down it would go up and down electrically just fine, except when it got up as far as it could it made a 'bang-bang' sound as the motor tried to mesh with nothing!
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