Mercedes-Benz E320 4MATIC Problem Report

Mercedes-Benz E320 4MATIC Erratic HVAC Blower Motor Operation

(8 reports)

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.

Strange erratic blower and A/C functions. Sometime it would blow strong but then stop, then back to strong with very little change in car cabin temperature or A/C settings. Only happens when using cold AC. -
Sometimes the a/c does not turn on, other times it does. -
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