Bad Switch/Blower Motor Resistor Assembly May Cause Inoperative Heater Blower Motor on Mercedes-Benz 300SEL

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: 156,500 (100,000–213,000)
2 model years affected: 1990, 1991
4 people reported this problem
2 people shared problem details
Blower is inoperative. checked blower fuse and it was ok.
Heating System does not work.
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