Mercedes 190e 2.6 Driver side front and back passenger windows don't work. Help please?

If the driver side front and back passenger Windows of your Mercedes 190E 2.6 are not working, first check the window lock switch to ensure it's not activated. Next, inspect the fuses related to the power Windows, as a blown fuse could cause them to fail. If the fuses are fine, the issue might be with the switch itself, wiring, or the window motors. It may be best to consult a professional mechanic for a thorough diagnosis and repair.