That roughly translates to me as, "I don't think this AC works. But if I charge it, and it still doesn't work, I have to admit it. But if I don't charge it, I can say it used to work, and I think it just needs to be charged."
I'd have to have a PPI done on this one, were I a potential buyer. I like the car a lot, but there is enough vagueness in the dealer's description that warrants a second set of unbiased eyeballs on the car first, for ANY person considering this 300.