2010 Jeep Grand Cherokee Owner's Manual - Page 222

UNDERSTANDING YOUR INSTRUMENT PANEL 221 NOTE: If you experience difficulty in playing a particular disc, it may be damaged (i.e., scratched, reflective coating removed, a hair, moisture or dew on the disc) oversized, or have protection encoding. Try a known good disc before considering disc player service. CLIMATE CONTROLS Manual Air Conditioning And Heating System - If Equipped The controls for the heating/air conditioning and ventilation system in this vehicle consist of a series of rotary knobs. These comfort controls can be set to obtain desired RADIO OPERATION AND CELLULAR PHONES Under certain conditions, the cellular phone being on in interior conditions. your vehicle can cause erratic or noisy performance from your radio. This condition may be lessened or eliminated by relocating the cellular phone antenna. This condition is not harmful to the radio. If your radio performance does not satisfactorily "clear" by the repositioning of the antenna, it is recommended that the radio volume be turned down or off during cellular phone operation. 4 Manual Air Conditioning And Heating Controls