My car had a problem with the drivers side window not going up. Sounded like a switch problem to me. I thought about buying a new switch but ran across a DIY which I'm sure you've seen.
http://www.grill.org/rodney/mclass/mlswitch/index.html

Anyway, I was having the famed machine gun lock issue, too. The rear passenger door lock was not functional. After doing the DIY, it works again.
Might be a coincidence, but I thought I'd let you know.