The HVAC blower motor may fail. This is commonly caused by water entry through the cabin air filter areas during heavy rain or snow. Failed blower motors should be replaced. Our technicians tell us there is no special fix for this issue at this time.Google+
Car Problem Reports
Mercedes-Benz ML320 CDI HVAC Blower Motor May Fail
Mercedes-Benz ML320 CDI Problem
Visitor, 2007 Mercedes-Benz ML320 CDI, 80,000 mi
HVAC Blower Motor Do NOT turn off even with key out. No solutio until now. Every time I park, I remove the electric connector. Otherwise, I'll lose another battery ($ 200.00 ). The manual and FUSE Chart doesn't show any relays identification. I'm lost !!!!