Blower motor, 98 E-320

[Spookwriter]

On my parents 1998 E-320, the heater blower motor will not come on. Neither heat nor AC. BOTH heat and AC will run occasionally...but not always.

Have checked fuse panel. OK. Next, loose wires? Bad Motor? Where is the blower motor, and how do I get to it?

If this helps...heater seems to work a little bit if it gets warm outside. Blows lightly, if that makes sense.