AC Vacuum Pod whining

[aldedmon]

92 400SE At least 1 of my upper AC pods whines in an out with changes in vacuum. With AC on Auto and high, she whines all the time. However if I take it out of auto,it'll whine if I left off the accelerator or if I hit the brake...If I disconnect the green vacuum from right side of engine compartment vacuum pods, it stops.....Is there a quick access to these 2 upper dash pods inside the car...Or might the problem be something else