The blower on my 1983 300sd will sometimes totally stop blowing. It happens only occasionally but, in the South's summer heat, it is very annoying. One thing leads me to believe that it may be the blower motor rather than the climate control unit. After it stops, it sometimes starts again spontaneously after hitting a bump in the road. I'm thinking bad bearings or brushes (or both) may be causing the motor to seize. Also, the output of the blower, even when it is running is pretty dismal. It's barely enough to keep the passenger compartment comfortable in the summer. So, I suppose my questions are... Does it seem like a blower motor problem? Is it hard to remove and replace? Is it rebuildable? Is there a higher output version available or can this one be modified to move more air?

Thanks.