Just picked up a 300SD that has been sitting for a while. The car is in good shape but the Passengers side front and Drivers side rear windows will not roll up or down. Checked the fuse. What else should I check?

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1985 Mercedes 300DT

Try replacing the fuse, they can have cracks in them that are hard to see. Plus the windows are wired so that if a fuse blows RF & LR or LF & RR go together.

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Chad
2006 Nissan Pathfinder LE
1998 Acura 3.0 CL
OBK#44
"Pleasure in the job puts perfection in the work." - Aristotle (384-322 B.C.)

SOLD
1985 300TD - Red Dragon
1986 300SDL - Coda
1991 - 300TE
1995 - E320
1985 300CD - Gladys

I'm not as familiar with the SD's as I am with the D's but on this one there are the regular red, white and blue euro fuses of course and then 4 bigger metal box looking fuse things behind the regular fuses. What are these?

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1985 Mercedes 300DT

Relays.
Replace all your fuses.

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83 SD

84 CD

Replace the fuse, the windows are wired criss-cross.

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1985 300TD Turbo Euro-wagon
1979 280CE 225,200 miles
1985 300D Turbo 264,000 miles
1976 240D 190,000 miles
1979 300TD 220,000

GONE but not forgotten
1976 300D 195,300 miles
1983 300D Turbo 175,000 miles

http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg

Replace fuse "a".

This is what I found when I was having problems with the fuse. With out pulling the fuse it looked good; when the fuse was pulled out there was a surprise for me!

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84 300D, 82 Volvo 244Gl Diesel

^^There you go, they can look fine from the front.

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83 SD

84 CD

You may have to clean the console switches. I did that on my 300D and presto, all the motors works up and down.

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daw_two
Germantown, TN

Links:
Sold last car --- 05/2012 1984 300D Light Ivory, Red interior
Cluster Needles Paint
New Old Stock (NOS) parts

Past:
3/2008 1986 300SDL "Coda"
04/2010 1965 190D(c) "Ben"
& many more

I replaced the fuses with fresh fuses and switched out the console switches with known working ones and I still have the same problem. Nothing going on with the front passenger side and rear drivers side window. I took the front pass. side door panel off and tested the motors with a volt meter and they seem to be getting power. Is it just a coincidence that both of these motors are non working. Seems like something else may be afoot. Can I replace the motors without replacing the regulators?

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1985 Mercedes 300DT

It would be not be a coincidence if they stopped AT THE SAME INSTANT.... otherwise , they could have quit at different times..... but keep looking for something they have in common ... like poor connections or poor grounds.... etc..

Would they both be sharing the same ground? And if so where would I locate that?

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1985 Mercedes 300DT

The console was taken apart and put back together by a guy who did a botched veggie conversion on the car. Is there a ground in the console?

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1985 Mercedes 300DT

It's not a ground. The two front windows share the same ground.

Please check for voltage on both sides of fuse "a" and report back.

Checked the voltage for both sides of "a" fuse and they are getting power for sure...checked the voltage at the motor and it seems like it is getting power as well...

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1985 Mercedes 300DT