I have a 1998 e320 chasis 210.

I have bought a regulator for this car from a junk yard. I don't have the part yet. Does someone have a pic of what the regulator looks like? I have seen some other pics around and it looks nothing like what I have on my car. Only thing I can see is a wire that has little black box that is attached to the blower motor with two screws. Is this the regulator? Doesn't look like it is replaceable? Can anyone explain in good detail about this.