2005 Chrysler 300 Owner's Manual - Page 209

STARTING AND OPERATING 209 After Starting The idle speed will automatically decrease as the engine warms up. ENGINE BLOCK HEATER - IF EQUIPPED The engine block heater warms engine coolant and permits quicker starts in cold weather. Connect the cord to a standard 110-115 volt AC electrical outlet with a grounded, three-wire extension cord. The engine block heater cord is routed under the hood on the driver side of the vehicle. It has a removable cap that is located on the driver side of the Integrated Power Module. TRANSMISSION SHIFTING 4 Speed Automatic Transmission 5 WARNING! Remember to disconnect the cord before driving. Damage to the 110-115 volt electrical cord could cause electrocution. Gear Selector Shifting from D (Drive) to P (Park) or R (Reverse) (or from P or R to D) should be done only after the accelerator pedal is released and the vehicle is stopped. Be sure to keep your foot on the brake when moving the shift lever between these gears.