The power window switch may fail and the windows will not raise. The main switch at the front center console is commonly at fault. A failed switch will require replacement.Google+
Car Problem Reports
Mercedes-Benz ML430 Power Window Main Switch May Fail
Mercedes-Benz ML430 Problem
Average Mileage: 95,428 mi (10,000 mi - 173,000 mi)
Visitor, 2001 Mercedes-Benz ML430, 110,000 mi
driver side pwr window won't raise
Visitor, 2000 Mercedes-Benz ML430
My windows will not roll up or down and my door locks to up and down repeatedly after using my remote key and after locking the doors from inside the car. My backseat right door will not lock at all
Visitor, 1999 Mercedes-Benz ML430, 173,000 mi
Actually a 1998, for a few months, window would be difficult to get back up but would always go after messing around with it. Now it is totally unresponsive
Visitor, 2001 Mercedes-Benz ML430
Windows wouldn't go up or down. how can i fix it? pls help me
Door window down; switch doesn't work-getting it repaired.
Visitor, 1999 Mercedes-Benz ML430, 10,000 mi
the switch contact are not good, spring is too soft.
Visitor, 2001 Mercedes-Benz ML430, 136,000 mi
Windows wouldn't go up or down without pressing switch hard in different directions...replaced switch..works great!