The windshield motors have a heat sensitive safety switch that fails...
I think you can open the back, and clean thw reed contacts and reassemble for a functional motor again.

Also, the sdl/SELmotors with regulators will bolt right up to an sd

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

That’s a great tip. Thanks. Will keep that filed away someplace.

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79 300TD “Old Smokey” AKA “The Mistake” (SOLD)
82 240D stick shift 335k miles (SOLD)
82 300SD 300k miles
85 300D Turbodiesel 170k miles
97 C280 147k miles

Are the part numbers the same?

I doubt it.

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

Then what are the numbers?

No idea. I snag em from a pick n pull

__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

So it is now
August 12
and I finally got around to replacing the unit.

Went very well. About 2 hours. The motor was no way swap able with the old one so I did the entire regulator system.

I must have been super lucky because it all went flawlessly. Everything was phillps and 10mm socket

The mountings seem to have adjustability but it all worked on first try so I tightened it together and called it a day.

The stock Z was Z = 8 for the OEM, no clue about the aftermarket unit I never dismounted the motor because it was obviously not going to mount up to the OEM regulator. There were some differences with the new one but it worked fine where it attached and matters.

The question that remains is how long this will last.

My '85 SD has a broken, front passenger side aftermarket window motor/regulator. The equivalent to what's in it is ~$60.00. I ordered one from Rock Auto that was about double that. If I had the original regulator I would have just bought the motor. They seem to be available for ~$180.00 to $200.00 depending.

I didn't get the impression that they're hard to find.

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1985 300SD Turbo Diesel

Great news! Can you link us with a source for new original motors? Thanks

Go to the junkyard - there are plenty! Open one up, inspect for grease and re-grease with plastic safe grease, such as brake grease. I had issue with one of mine, turns out it was filled with water! I think some later models have a water cover.

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Theseus

Instragram: doss_project
1984 300SD - 930 Blue, OM 617
Murfreesboro, TN

Theseus owned a ship in Greek mythology, and when a part of the ship needed replacing, it was replaced. Eventually, everything was replaced. Is it the same ship? (I own the car of Theseus. )

I'm shy about old used parts. The originals all fail in unfix-able manner, how much life is left in some similar used one? The cost for me to drive to some place with W126's would exceed the cost of new.