Rod,

Ive got the same problem with my wife's ML. I have been working at narrowing the problem. Same symptoms...Ive gotten several possibilities from an evaporator temperature sensor, to the control unit...Those are two possilities you can check.

I thought it might have been the control unit, but from what I see happening now, the AC will act up even when I dont mess with the controls at all. I want to know if anyone knows how to test the evaporator temperature sensor? If there is a way to test it.

__________________
1994 S320
131K miles

1998 ML 320
126K miles

1994 Blue C220
122K miles

Im going to Grad School @ the University of Iowa
Go Hawkeyes!!!