Improper Temperature Output From HVAC on Mercedes-Benz 350SDL

Problem Description and Possible Solution

One or more blend door vacuum actuators may fail resulting in the incorrect output temperature from the HVAC system. Failed actuators will require replacement to restore proper HVAC operation.

Problem Data
RepairPal Verified
Average mileage: (–)
2 model years affected: 1990, 1991
2 people reported this problem