Mine doesn't work either on my 1995 E320. Are you sure its the switch?
It was the window regulator on mine. Can you here any sounds when you operate the switch? (Either grinding or just a free-wheeling electric motor)
Window reg is a nasty job and fairly $$$. Do all of your switches in the console light up at night? I take the wooden console out of mine occasionally and take the switches apart to clean them as they become somewhat sticky and unresponsive after a while. The switches just pop out of the wood with two plastic tabs; then the black (lit) button part of the switch just pops off the switch with the two ends on either side of the switch. Pull the white part with the LED light out next; careful--there are two tiny springs and a ball bearing on the "feet" of the white part. You can pull the white part out upside down if you want. Then you see the contacts of the switch. You should be able to fix what's wrong with it. Good Luck

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2002 Mercedes-Benz E320 4Matic
1995 Mercedes-Benz E320 Wagon
2005 Land Rover LR3 V8 SE
1999 Audi A8 4.2L quattro