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

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

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Average mileage: 80,333 (40,000–101,000)
6 model years affected: 1994, 1995, 1996, 1997, more1998, 1999
10 people reported this problem
2 people shared problem details
the blower wasnot blowing air on hi speeds so had to replace the relay
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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.
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