Erratic HVAC Blower Motor Operation on Mercedes-Benz E320 4MATIC

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: 112,500 (110,000–115,000)
6 model years affected: 1998, 1999, 2000, 2001, more2002, 2004
8 people reported this problem
Viewing 1 - 2 of 2 comments
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.