You can't repair it - you have to replace it.
Remove the inside door panel. The entire power window mechanism will be visible. Put the window back onto the window track.
To repair a power window in a Porsche 944, first remove the door panel to access the window mechanism. Check for any loose or damaged wiring, and ensure the window motor is functioning by testing it directly with a power source. If the motor is faulty, replace it; if the issue lies with the regulator, repair or replace it as needed. Reassemble the door panel once repairs are complete and test the window to ensure proper operation.
go to flickr, I have several pictures on how to fix.
Here's how to test and repair power windowshttp://www.ricksfreeautorepairadvice.com/repair-topics/window-power-repair/replace-a-power-window-regulator
To repair the power window on a 2008 E350, start by removing the door panel to access the window mechanism. Check the window motor and regulator for any signs of damage or wear; replace them if necessary. Inspect the wiring and connectors for any issues, and ensure the fuse related to the power windows is intact. Reassemble the door panel after repairs, ensuring everything is securely fastened.
See this post for instructions and photoshttp://www.ricksfreeautorepairadvice.com/repair-topics/window-power-repair/replace-a-power-window-regulator
Can't be done. You must replace the entire window regulator.Here's howhttp://www.ricksfreeautorepairadvice.com/repair-topics/window-power-repair/replace-a-power-window-regulator
You must replace the entire regulator.Here's howhttp://www.ricksfreeautorepairadvice.com/repair-topics/window-power-repair/replace-a-power-window-regulator
You have to disconnect the glass from the regulator or clip the regulator cables.See this post for instructionshttp://www.ricksfreeautorepairadvice.com/repair-topics/window-power-repair/replace-a-power-window-regulator
First test to see if the problem is the switch, wiring, or the motor. Here's howhttp://www.ricksfreeautorepairadvice.com/repair-topics/window-power-repair/test-power-window-motor-and-regulatorThen replace the regulator if the switch and wiring test good. Here's howhttp://www.ricksfreeautorepairadvice.com/repair-topics/window-power-repair/replace-a-power-window-motor-regulator
Broken window glass sash clips or door glass attaching clips.Here's how to fix:http://www.ricksfreeautorepairadvice.com/repair-topics/window-power-repair/replace-a-power-window-regulator
Here are complete step-by-step instructions (with photos) on how to remove a door panel: http://www.ricksfreeautorepairadvice.com/repair-topics/window-power-repair/remove-a-door-panel-from-any-vehicle-without-a-diagram Here are complete step-by-step instructions (with photos) on how to test a power window motor to determine whether the problem is in the motor/regulator or the switch/wiring http://www.ricksfreeautorepairadvice.com/repair-topics/window-power-repair/replace-a-power-window-regulator -cable