This is very common and i experienced it on all my 3 crossfires. If it was blazing hot outside the air when turned on for the first time would blow hot air for a little longer time than i'm used to in other cars but it will then start to cool very very quickly. Also be wary of failed cooling fan motors. A big problem even on the BENZ side and even a recall was issued by Chrysler on it.

Mine left me with a brand new crossfire on the side of I95. The dealer told me the squeaky sound was probably a pulley that needed lubing or something after my insistence and careful inspection they deemed my cooling fan faulty however since Mercedes was encountering the same problem the motors where all on back order so i was told it was safe to drive the car for the next few days til they got the new motor in and i had them put it in writing that they were releasing the car to me in that condition. Well the next day it left me stranded with an overheated engine on the side of I95. The minute my coolant temp light came on i quickly turned the car off and coasted it to the side of the highway and had to have it towed how embarrassing as the car had just come out and everyone was admiring it on the side of the highway LOL.

So be careful if you hear a squeaky sound don't just assume its water in a belt or a squeaky pulley its probably the bearings failing in the cooling fan motor get it replaced ASAP or it WILL LEAVE YOU STRANDED.

Also to note after my cooling fan was replaced my car ran a hairline cooler on the gage and the a/c cooled a lot faster.