One problem related to air conditioner has been reported for the 2006 Chrysler 300C. The most recently reported issues are listed below.
A/c produces moldy, musty smell which causes allergy problems, sneezing, coughing, watery eyes. Took to dealer where it was cleaned and supposedly treated for mold on the evaporator. Condition was improved but still present. I will return to dealer ASAP to complain again. Dealer/service writer says all cars in florida do this. I have lived in FL all my life and have only had one other car that this happened. The manufacturer had issued a recall and the problem was corrected after one trip to the dealer. The problem did not reoccur.