Hi there.

First time poster as I am a new Mercedes owner. We just got my wife a 1998 ML 320 and it just recently started randomly blowing hot air and then cold air (a/c). It switches back and forth in no apparent pattern. I think the a/c and heater are working fine as the cold is quite cold and the hot is hot, so it seems like there is a sensor or switch that is out of whack. Any ideas would be helpful

Thanks, Mike