Bad Switch/Blower Motor Resistor Assembly May Cause Inoperative Heater Blower Motor on Mercedes-Benz S320

Problem Description and Possible Solution

Other than a defective motor, a bad switch or blower motor resistor assembly can cause an inoperative heater blower motor.

Problem Data
RepairPal Verified
Average mileage: 105,600 (40,000–176,000)
6 model years affected: 1994, 1995, 1996, 1997, more1998, 1999
14 people reported this problem
Viewing 1 - 4 of 4 comments
When turning on A/C, nothing happens, no fan, nothing. S320. Want to purchased car for son but don't know if this is just the evaporator fan relay or bigger issue.
the blower wasnot blowing air on hi speeds so had to replace the relay
Blower speeds increase from 1 thru 4 after that the blower diaplay indicates speeds 5, 6, and 7 but the actual fan speed does increase.
Heater/ac blower not working at all. No heat no defrost no ac no air coming from the vents at all.