2001 ML320 window switch driver's side not working.
I fix the same problem 1 week ago, I Google it and the switch costs $150.00 at a dealer.
I own the same vehicle, 35 K miles, so I decided to do it myself.
All it was the metal contacts at the base of the switch had to be straighten out.
Pictures included, Thanks a millon to grill.org
http://www.grill.org/rodney/mclass/mlswitch
I recomend to register here too
BenzWorlsd.org