HVAC blower motor Question:
 

I have a 95 SL 500. The HVAC blower motor suddenly will not blow harder than second speed. When it's 104 outside, this is not a good thing! The system is putting out cold air, the blower motor just isn't blowing very hard. It doesn't matter if the control unit is on auto or running in manual mode. Should I direct my attention to the blower motor or is the control unit going out?