DUCT TAPE!

Sorry I didn't understand. Maybe this will help.

Take about two one foot lengths of duct tape (or perhaps duck tape) and lay each piece over the top of the door so it hangs down evenly on each side, and then stick it firmly to the glass on both sides. I think one piece would do it, but you could use more or longer pieces for greater security. I imagine that package tape (the plastic kind) or masking tape or plastic electrical tape would also work.


The goo that might stay stuck to your windows can be removed with rubbing alcohol (the cheap, clear kind).

You can test whether current is getting to the motor with a test light or buzzer. Clip the gatorclip to ground (any bare metal inside the door, and place the pointy end on each connection) Turn on the ignition, then press the button. If the light comes on, then you know that current is getting through The connection you were touching is the hot wire. Usually the ground wire is black on Mercedes.

The motor is held on by three nuts. You will have to feel around on the backside of the motor for at least one of them. Check each place where the regulator mechanism has a joint to see that there is not something twisted or jamming. Check the bottom of the door for bits of broken plastic.

You may not need to replace the motor. The motor may simply be restricted from moving by a bent joint in the mechanism.

When you have replaced everything that is not working, spray some WD-40 on all the connections and replenish grease to anything that seems to have had grease on it.

There are four places where a power window can fail: the switch, the motor, the regulator assembly and the wiring.

Also the first place to look: the fuse, of course.

Good luck!

If the regulator assembly is shot, and usually it just needs new plastic sliders, your best place to get a new one is a junkyard. The assembly is different for each window LF,RF,LR, RR: so are the motors, at least this seems to be true of my car.

The check strap on the door can also keep the window from rolling down all the way on some models.

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1990 300D 2.5 Turbo sedan 171K (Rudolf)
1985 300D Turbo TD Wagon 219K (Remuda)

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