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Erratic HVAC Blower Motor Operation on Mercedes-Benz E300

Problem Description and Possible Solution

A malfunctioning HVAC blower motor regulator can cause the blower motor to operate below the requested speed or not at all. Updated regulators are available; the blower motor and cover need to be replaced at the same time to upgrade the system.

Problem Data
RepairPal Verified
Average mileage: 173,500 (167,000–180,000)
4 model years affected: 1996, 1997, 1998, 1999
6 people reported this problem
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replaced regulator
Not fixed yet