How do you get a power window down that is stuck on a 1992 Mercedes SL 500?

To lower a stuck power window on a 1992 Mercedes SL 500, first check the fuse related to the window operation and replace it if necessary. If the fuse is intact, try gently tapping the door panel while pressing the window switch to see if it will release. If that doesn't work, you may need to access the window motor by removing the door panel and testing the motor directly with a multimeter or applying power to it to see if it functions. If the motor is faulty, it will need to be replaced.