1987 420SEL. A/C blows cold, but ONLY out of defroster vents. on 1990 Mercedes-Benz 420SEL

Doesn't matter what climate button is pushed, air out of defroster vents only. Frustrating. Suggestions?

Asked by for the 1990 Mercedes-Benz 420SEL
agree with #1
1 more answer
check your blend door and the actuator to see if they are working properly