[BLCKFLSH]

The dry air, from the compressor, helps to clear the moisture from the glass. Without it, you have to depend on heat, to dry the glass, and that can take a while. You can turn A/C off manually, if you insist, but I don't think you can re-program the car to not turn the A/C on when you hit the defrost button.

 

[BLCKFLSH]

I have the auto climate and you can turn on the windshield, and floor vents, without the A/C on, by using only the up/down fan buttons, and the mode select button, not the auto button or the defrost button. I don't think you can select the windshield only though. Just hit the A/C off button, then control the fan with the up/down buttons, and direct the air with the mode button.

 

[BLCKFLSH]

Are you sure that when the AC light is off the clutch is disengaged? Before I did the mod, my AC light could be off, but if the defrost was selected the compressor was engaged.

Yes, the compressor is off. The display will say "A/C off" and the fan will still be blowing through the windshield vent, and of course the floor vents. There is no selection for windshield only. When I want heat on the windshield, I usually want heat in the rest of the car too. I didn't do any "mod". This is how it's always worked.

PS: Car has auto climate