Dang, you revived a dream I still want to use the the middle position of the fader to pass the ACC's automatic signal to the blower, essentially replicating a W140 blower thumbwheel. Turning below the middle position proportionally slows the blower to the ACC's low setting, turning above the middle position proportionally speeds up the blower to the ACC's max setting (seems the ACC's auto setting never blows as hard as max), both relative to the ACC's instantaneous automatic signal. But Jeremy rained on that dream by suggesting that modifying the signal to the blower might set the ACC into a loop.

Sixto
87 300D