Erratic HVAC Blower Motor Operation on Mercedes-Benz E320

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: 132,792 (28,000–400,000)
9 model years affected: 1994, 1995, 1996, 1997, more1998, 1999, 2000, 2001, 2002
44 people reported this problem
Viewing 1 - 17 of 17 comments
The blower motor stays on all the time, even when the key is out of the ignition. I looked on line and it is likely the regulator. I am going to check it, and see if it is blow, but I need to get a voltmeter. I will get one and check.
No forced air on heat or AC. Replaced Electric motor and blower regulator
I turn off the car and the air conditioning fan keeps running even if I remove the key.
Ac does not blow hard enough at max but still blows correct temp.
Blower ramps up and down in speed.
blower stop working and i replaced the motor and had the same problem i hope its the regulater
Replaced sensor.
Speed of blower does not work
Replace part fan regulator aprox 45.00
Installed new blower fan and now getting burnt smell out from vents. Blower motor working fine don't see what's causing this issue. 95 e320 wagon.
blower motor and regulator replaced
I haven't fixed it yet but my windows work when they want to?
I just bought the car in Belton South Carolina. The dealer lie about the blower I had 6 Heart by passes amdi new the air-conditioning. I bought the car last Wednesday an today date is July,31. I on disability an need help. My money goes to Dr s and meds..I need air be cause of heart condition
My heater was making noise and then stoped working
I'm still ordering the blower motor and regulator. Hopefully this fixes the problem. I've the voltage going to the blower motor and it seems to be okay.
the a/c and heater have been an issue since i purchased the car. when it works its great.....but it is gettting to be less and less