Hi All,

This one's got me going. In my '87 260E, the driver's door power window slows down to a crawl at about 1/3 of the way down from the top. It also slows down in the same place on the way up. The passenger side is similar, but not as bad. I've searched the forums with words like "tight" or "stick*" along with power window and no one else seems to have discussed a similar problem.

I've got a couple of manuals & followed their procedures for adjusting the window. The nylon sliders "regulator guide jaws" they're called officially, seem to be in decent shape and I've cleaned & lubricated all the slide tracks, pivot points and the teeth on the big gear segment of the regulator.

The adjustment procedure seems to be pretty straightforward, and I've played with the adjustments in many combinations. The window zips right along for the bottom half of its travel and closes tight when it finally gets to the top. It just slows to a crawl about 1/3 from the top, occasionally tripping the circuit breaker from current draw.

The motors seem to work fine and the system voltage is 14.4 Volts when the engine's running so I don't think that's a problem.

Sitting back and looking at the mechanism, it seems like the back edge of the window is tight against the door seal. Moving the vertical slide forward about a mm might do it, but MB welded that part into the door. Probably with good reason so I'm not about to mess with it.

Any similar experience? Any solutions?

Tight,

__________________
Norm in NJ
Next oil change at 230,000miles