Heater Blower Motor May Become Noisy on Mercedes-Benz ML320

The heater blower motor can become abnormally noisy. Replacement of the blower motor is commonly necessary to correct this concern.

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Average mileage: 148,666 (63,000–235,000)
6 model years affected: 1998, 1999, 2000, 2001, more2002, 2003
21 people reported this problem
7 people shared problem details
i have no air or heat...just air coming out and it's loud
heater (fan) only works on 1, and the 2,3,4 make a lot of noise and vibrate so hard, but no air
replace fan motor
The back seat blower remained on all of the time and was extremely loud. My mechanic had to unhook it in order for it to stop running the battery down.
AC fan became noisy
Ny blower motor is very noisy
The heater blower motor is very loud and now does not blow air through the system.
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