1991 300CE

My window regulator has a few teeth missing near the top of the window travel, so it wont go up the last 3/4" or so....

Does anyone know if it is possible to raise the glass up relative to its attachment to the regulator...i.e. (the window would go all the way up, but just wouldnt go all the way down instead)...sounds just crazy enough to work....anybody?

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1991 300CE Sportline
1983 300SD TurboDiesel (Gone but not forgotten)

Sounds like it should work, try it. Also lube it well and window check alignment so more teeth don't break.

I'd prefer a permanent solution replacing the regulator. This guy is parting on 2 CE's, not sure if he'll ship though: (510) 792-8100

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'88 300TE, 175k, black RENNTech 3.6L Recaro C's AMG 1 SOLD
'92 500E, 110k, Spruce green, stock SOLD
'94 E320 Cabriolet, 130k, E500 wheels, Emerald green SOLD
'94 E320 Cabriolet, 110k, black, stock, SOLD
'88 300TE, 229k, dark grey, SOLD
'90 300CE, 212k, white, new paint, SOLD
'91 300E, 209k, white, rebuilt head SOLD
'74 914-6, grey, 2.7L 325hp twin turbo Audi conversion

yeah but wouldnt it only lower about 3/4 an inch if you did that? It seems if you go through all this work, you might as weel do it right and fix it. Both my windows do the same thing. I just pick them back up manually if I need to lock the car or its cold outside. One of these days I will fix it but I have to remove the door panel first just to see what brand they are and they are not the cheapest things to buy. Just as a note. My indy told me to get OEM as the aftermarket ones are horrible.

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1984 300SD Orient Red/ Palomino
1989 560SEC
2016 Mazda 6 6 speed manual
1995 Ford F-150 reg cab 4.9 5speed manual

My question is regarding the actual attachment of the glass at the regulator...I've never been in the door panel, so I don't know the nature and configuration of the attachment. I was wanting to know if anyone knew if it was possible to raise the glass in its "seat" as much as 3/4".

I mean if the attachment to the glass (I am assuming its some sort of "clamp") is only 1/4" of grip on the glass, then obviously raising it 3/4" would not work. Does anyone know if there is 3/4" or more grip on the glass "clamp".

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1991 300CE Sportline
1983 300SD TurboDiesel (Gone but not forgotten)

Even if you fabricated an extension you have to consider the space underneath. The regulator may hit hard on the bottom if there is no shut off switch to retracting to it's lowest position. By the time you figure out a band aid you could have already found a good regulator and repaired it correctly. Not bad to think out of the box but in this case it's best to get a good regulator.

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'88 300TE, 175k, black RENNTech 3.6L Recaro C's AMG 1 SOLD
'92 500E, 110k, Spruce green, stock SOLD
'94 E320 Cabriolet, 130k, E500 wheels, Emerald green SOLD
'94 E320 Cabriolet, 110k, black, stock, SOLD
'88 300TE, 229k, dark grey, SOLD
'90 300CE, 212k, white, new paint, SOLD
'91 300E, 209k, white, rebuilt head SOLD
'74 914-6, grey, 2.7L 325hp twin turbo Audi conversion

The glass is firmly attached to the lift mechanizim. As someone else has said, I would replace the sector gear. I have done it. It is not to difficult. Your up limit switch probably caused the sector gear to be damaged. Check for proper operation. A I recall, the switch is built into the lift motor.

hmmmmm... how does one "manipulate" the UP LIMIT mechanism? i may need to adjust mine as my windows seize whenever i close the windows all the waaaaaay up...
i managed to solve this "temporarily" by re-lubing the gearbox and "cleaning" the motor with an electronic cleaner and a light silicon spray... closing speed became a bit faster... but not as fast as i would like...
anyway... can anyone expound on the UP LIMIT thingy?

and yeah... you can't "move" the glass further up the "clamps"... and if i remember correctly, the sector gear is riveted with the scissor mech at the joint... i may be wrong.
87 300TD

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85 190E 2.3(SOLD)
86 230E (-->300D) sold
87 300D (-->300TD) sold
68 250S w/ a 615 and manual tranny (RIP)
87 300TD (SOLD)
95 S280 "The KRAKEN" (Turbo 2.9 602 transplant) traded
86 190E 2.3... current project

thanks for the info, I am going to have to find the best price I can and just go ahead and buy one...but, I always check here first for any tips and tricks. I have learned a lot about how this thing works from you guys; it will be much easier to go in and fix knowing all these things.

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1991 300CE Sportline
1983 300SD TurboDiesel (Gone but not forgotten)

You can also put a couple dabs of weld were the missing teeth are and file it smooth. I did this on mine a couple of years ago and no problems.

Power windows do not have limit switches. The window goes all the way up or down and you let go of the switch and the motor stops. The auto windows use electronics to measure the amperage and when the windows gets all the way down or up the amperage jumps up a lot and the electronics turns the window motor off. After working on power windows and such for the last 50 years, I have never seen a limit switch on a power window. Of course, I have been wrong before and may be wrong again.
I hope this information will help you in your quest to fix this problem. I can't help with the extension question but anything is posible.
Paul

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84 500 SEL (307,xxx miles)

That seems obvious now that you explained it so well....thanks, I was starting to think there was some other switch that I had to find and check. I've work with window systems on other cars, and I've never heard of or seen a limit switch either. However, I did always wonder about how the system "knew" to stop the voltage to the motor coils. Thanks for the valuable information...

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1991 300CE Sportline
1983 300SD TurboDiesel (Gone but not forgotten)

David, the coupe door windows do require adjustment since there is no frame. I had the local dealer adjust the passenger's window in our 1992 300CE because it was hitting the rear glass upon closing the door, so I have no firsthand experience with the adjustment. I do know it is a painstaking trial & error process. The angle and orientation of the window adjust so the glass seals tightly with the rear glass and the roof seals.

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Fred Hoelzle

I heard someone else on here say that they did it themselves, and the CD-rom had an excellent instructional; but, I'm more inclined to let the mechanic adjust the window if the cost is reasonable.
How much did it cost you to have the mechanic do the adjustment?

Thanks

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1991 300CE Sportline
1983 300SD TurboDiesel (Gone but not forgotten)

David, the window adjustment was done for free under an extended warranty.

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Fred Hoelzle