We have a 1990 300E. The driver side seat motor is only moving forward. We are now squished uncomfortable.....Does anyone know if it can be adjusted manually?

you can replace the motor...

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1994|040|W124.036|E500
http://www.mbworld.org/forums/image....ine=1216527951

I recently had a similar problem with the driver's seat. I bought a new seat control since it is a very common problem, I still had problems, I bought a complete new (to me) seat and I still had problems. It turned out to be one of the female electrical connections between the seat and the car was too wide to make good contact with the male pin. There should be two electrical connections in the front under the seat. Try that first...In case that it is a bad motor and/or seat control, I may have all the parts you need. I can let go for cheap... Let me know and good luck.
P.S. Do a search, I posted some pictures recently...

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J.H.
'86 300E

The seat adjuster switch is very failure prone, and should be the first item to check AND clean internally, followed by continuity between the door and the seat. Do any of the other directions work? Yes to the manual adjustment, you almost need the seat out of the car, this presuming the you have a power problem as I believe. You can jumper the motor at the connector and drive it back to a more usable setting.

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Mark
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THE WHITE FLEET
2016 GLE300d 4-MATIC 38K BROWN!
2012 S350 Bluetec==94k WHITE

2007 ML320 CDI==166K WHITE (FOR SALE)

Under new management:
2005 E320 CDI--140K--WHITE
1995 E300-Diesel-133.5K--THE CAR IS BLUE
1986 300SL--97.5K (European) AND WHITE. Back in Europe!
1991 190E 2.3-73K California Perfect.--WHITE
1995 E320-Wagon-159K--WHITE (recently scrapped)
1987 300D Turbo-213K--WHITE
1987 190D 2.5 Turbo-288K--WHITE

Try running the seat FULL FORWARD until it stops. Then see if it'll move rearward. It should - had a similar problem with my W210 recently and this fixed it.

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1998 E320 4-Matic Wagon