I've had my 599 for over a year and love it! I assume this is normal, but do you turn on the off button fro turn off the AC? That is, if I want to turn off my AC, I turn on the off button? That's the way it works on mine. It's my 4th Ferrari and I know they can be quirky, but this makes me chuckle every time I do it. Gas
I'm not down in the car, but I think that sounds correct. In other words, the little light comes on telling you the AC is off!