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post #21 of 31 (permalink) Old 04-04-2019, 09:25 AM
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BTW, what you described is very similar to what I had when "one" of my wires were broken. Intermittent operation, only goes in one direction, etc. Also the motor did make a "little" noise sometimes as one of the strands must have been barely touching. This noise had me convinced that it must be the regulator. Did you open the door card and tug on the wires individually to make sure they are truly "in tact".

I was dreading the window regulator replacement before I diagnosed the real problem.
Oddly, it was my hardly ever used driver side rear door. Go figure. None of the other 3 doors have had any issues over the past 30 years.
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post #22 of 31 (permalink) Old 04-04-2019, 10:48 AM Thread Starter
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Yeah the wires all looked brand new. And the motor would work, albeit strangely, on it's own. Attached to the regulator it just clicked, nothing else. Mine is the passenger front door, which judging by the wear on the interior, was not used very much. Strange indeed.

I'm pretty sure a set of the AMG O.Z. rims would solve this problem.
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post #23 of 31 (permalink) Old 04-04-2019, 10:49 AM Thread Starter
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Originally Posted by sbaert View Post
FWIW, the window motors are pretty durable on these cars. The regulators, on the other hand, should be considered a wear and tear item especially if you don't lube the tracks and gears every couple of years.

That old factory grease just turns to tar with age. I like Mobiltac NC375 for anything with open gears exposed to the elements such as the regulators, wiper transmission, etc.
I'm wondering if this is the issue. The regulator itself seems to be in fine shape, and everything moves and the big gear isn't missing any teeth. But the grease is old and sticky, so the motor would really have to work to raise the window, but lowering it gravity would help it down. I'm tempted to try just re-greasing everything to see if that works.
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post #24 of 31 (permalink) Old 04-04-2019, 11:05 AM
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You need to remove the old tar like stuff with solvent, THEN relube with the proper stuff
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post #25 of 31 (permalink) Old 04-04-2019, 07:06 PM
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I like your optimism :-)

(in relation to the OZ wheels...)

Last edited by betapi; 04-04-2019 at 07:07 PM. Reason: reply not specific in re to what I replied
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post #26 of 31 (permalink) Old 04-05-2019, 04:02 AM Thread Starter
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sbaert - any recommendation on a solvent?

betapi - While I'd prefer 16 or 17 inch for a more retro look, I'm currently drooling on these rims, which I'm sure would automatically fix the window problems and the catalytic converter
https://www.ebay.com/itm/New-18-inch...-/332885013733
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post #27 of 31 (permalink) Old 04-05-2019, 04:50 AM
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Anything decent like CRC Motor Pro works pretty good.

In a pinch, you can use gasoline or kerosone and the like as long as you're careful removing all of it (old grease, solvent, etc). This stuff tends to leave a nasty odor unless you're meticulous.

IF that old grease has really turned to tar, it helps greatly to heat it up using a old hairdryer or other heat source. Makes removal a bit easier.
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post #28 of 31 (permalink) Old 04-05-2019, 05:48 AM
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^Actually heating it up and trying the window should prove whether or not you even need to go through the trouble of changing out the grease.

'
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post #29 of 31 (permalink) Old 04-08-2019, 04:33 AM Thread Starter
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It's definitely pretty tar-like, yet otherwise the regulator seems to be perfectly functional. Maybe I'll get lucky and just need a clean and a re-grease
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post #30 of 31 (permalink) Old 04-08-2019, 09:59 PM
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Originally Posted by infinitenexus View Post
Hmm, thanks for the tip. I would like to lower it a little, maybe just an inch, but I don't really want a stiffer ride since it's my daily driver and my wife will be riding in it plenty. I was thinking maybe just chop a loop off each coil spring (with new shocks of course) to keep the ride soft and lower it a little bit.
lowering the car shortens the suspension travel, specifically the compression. if you don't compensate by using a stiffer spring, you will bottom out the suspension on road bumps/dips where the stock car would have had no problems. bottoming out the suspension too many times or too hard, and you damage hard parts.


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