Mercedes-Benz door windows are operated with electric motors. Switches control the motors. All four windows can be controlled by the driver and there's a control for all of the windows on the driver's door or the center console. Each passenger has a control, too. If the switches are not operating the windows, you can correct the problem with some troubleshooting.
Press the correct button if the window you want to open won't open and another one opens instead. On the driver's door set of switches the top-left switch operates the left front door window, the top-right switch operates the right front door window, the bottom-left switch operates the left rear door window and the bottom-right switch operates the right rear door window. The switch on each other door opens the window on that door.
Release the override switch if the rear windows won't open. The override switch is designed for safety to stop children from operating the windows. The switch is located on the driver's door (or console), and newer models include an indicator lamp that will illuminate when it's activated.
Press the lower part of the switch past the resistance point if express opening won't work. During express opening, the window opens without you having to keep the switch pressed down. Pressing the upper part past the resistance triggers express closing.
