The climate control is now my next project since replacing the A/C blower motor.

Need some info on whats going on so here goes!

1) Does the climate control have any backlighting?
2) The 2 fan buttons, the one clear button in the middle. Can anyone explain the functions of them besides the obvious. The white says auto, but do you push this in simultaneously with one of the fan buttons?
3) I seem to have the same flow of air out of the dash regardless of the button pushed for Econ, Floor, Floor and Dash etc. Does this mean something else is wrong?
4) Does the recycle button really do anything?
5) How do you defrost with the A/C on?

Yeah, yeah, i know Dumb questions, but some dummy has to ask them!

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1988 560SL
Black Pearl/Palamino