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 ML350 Power Window Main Switch May Fail
Mercedes-Benz ML350 Problem
Average Mileage: 101,270 mi (88,000 mi - 118,000 mi)
the power windows will not work intermittenly. sometimes I have to turn the car on and off and mess with the buttons to get any of the windows to react. I also have only warm air coming from the vents as though the heater is always on even when the temps are adjust to 60 deg.
Visitor, 2003 Mercedes-Benz ML350, 88,000 mi
Left front window will not raise. 2001 ML350
Visitor, 2005 Mercedes-Benz ML350, 97,081 mi
driver power window fail to respond after acting weird for a couple of days. fuse is ok.
Visitor, 2005 Mercedes-Benz ML350, 102,000 mi
Rear Right window does not want to go up or down. Window not responding to switch command. Window half open.