[503865]

Just noticed last night, that both windows on the driver's side lower themselves slightly when I open the driver's door, which I believe is intentional and designed to reduce wear on the seals when opening and closing the doors. However, now neither window is going back up when the door is closed, not even when I lock the car.

Is this a common problem?

Is it an easy fix I can take care of on the driveway, or is MB Sugar Land going to get another handful of my Ben Franklins to put this right? Monsoon season is nearly upon us down here in Houston, and I really don't want to come back to wet seats day in day out.

Thanks.

 

[wbundens]

Do they go up all the way when your sitting in the car using the buttons? If so you might want to try a "reset" like you do if you've had the battery out. Instructions are in the owners manual.

 

[m.e.g.]

-Inspect fuses 21, 22, 32 and 33. Pulling the fuses disconnects power to the front and rear power window circuits.

-Re-install fuses.

- Cycle windows up/down.

-With the windows up hold each switch in the up position for ~5sec.This calibrates the windows.

Hopefully this will resolve your issue!

 

[503865]

Thanks guys

Will try pulling the fuses and resetting and will get back to you.

 

[503865]

Thanks guys.

I tried raising the windows and holding the buttons in the "up" position for about 10 secs. It cured the problem and I didn't need to pull the fuses first.

 

[keyhole]

Is this a common problem?

We haven't had a post on this topic for quite a while.

This power window feature is called the Short-stroke in the WIS, and the details are shown below for, your interest. It can be noted that one of the pre-requisites for the operation is that the window is normalized. As with many aspects of this car, MB have 'engineered the sh1t' out of the feature, as my old boss would say.

The reasons for short-stroke are not too clear. I always imagined that it was to prevent a high air pressure situation when the doors are closed quickly - but that would not be a problem on the cabriolet, would it?

I do know (from experience) that if the side windows are covered in frost/ice, they can be stuck in position and this short-stroke movement will be prevented. In those situations, I always use a de-icing spray to remove all the ice on the window glass before using my remote key to open the door.

 

[503865]

MB have 'engineered the sh1t' out of the feature, as my old boss would say.

Old adage:

Most people say "if it ain't broke, don't mend it". Mechanical engineers, like me, however, tend to subconsciously do, if not openly say, "if it ain't broke, re-engineer / "improve" it until it is".:grin

 

[rudeney]

The short stroke required for the channel gasket used at the top of the glass (both cabriolet and coupe). If the glass is not lowered slightly, then it will catch on the lip of the gasket as the door is opened and closed.

 

[keyhole]

Thanks for the explanation.