It seems to me that you might have a sticking window regulator. Take the door panel off and grease or WD-40 the regulator. That should do the trick. Those window motors never die,the regulators tend to stick quite often,especially in older MB's.

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1987 mercedes 300E
1995 e320 conversion(hated the 300e grill)
HID/Xenon (D2S)
Keyless Entry
Monochromatic Paint (Custom Blue)
Smoked Tails
Flat Badged (front)
Debadged (rear)
custom "carbon fiber" console
18 inch HP EVO rims
Sold! Now I drive a Monte Carlo SS
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