It sounds like you have a bad window regulator. This is the mechansm that the motor is bolted to that raises and lowers the window. Removing the door panel is difficult and is really a job for a porsche mechanic. Its easily damaged and there is the side air bag to deal with. You'll need to disconnect the battery and let the car sit for a couple of hours to discharge the side air bag capacitor before starting work, so you'll need the radio code to reactivate your radio. The panel is attached to the door with screws behind the door handle and inside the door pocket. It needs to be disassembled as it is removed. Behind it is a door air seal held in place by snap fasteners. Each of these has to be carefully pried out to remove the door seal and expose the window mechanism.
Its time-consuming and not something you want to do if you don't have replacement parts on hand.
After you have got it apart, you'll want to disconnect the air bag before you connect the battery up to test the window operation and see what is wrong. Don't forget to disconnect the battery again before reconnecting the side air bag.
It sounds like it could be the plastic connecting bit that links the lock tumbler lever to the rod that operates the door lock mechanism, has broken or become disconnected. To check, you will need to remove the trim on the inside of the door, after removing any screws and the inside door lever and window winder.
Once you have the inside trim off and the plastic sheet, you will see an access hole for the door mechanism and the lock tumbler. It should be attached to the actuating rod by the aforementioned plastic bit. If plastic bit appears OK try re-attaching it or replacing it if broken. If the lever part of the lock tumbler which attaches to the rod is broken the lock will need replacing.
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