2009 Dodge Grand Caravan Owner's Manual - Page 324

322 UNDERSTANDING YOUR INSTRUMENT PANEL When rear controls are locked by the front system, the LOCK symbol on the temperature knob is illuminated and any rear overhead adjustments are ignored. Rear Mode Control Auto Mode The rear system automatically maintains the correct mode and comfort level desired by the rear seat occupants. Headliner Mode Air comes from the outlets in the headliner. Each of these outlets can be individually adjusted to direct the flow of air. Moving the air vanes of the outlets to one side will shut off the airflow. Bi-Level Mode Air comes from both the headliner outlets and the floor outlets. NOTE: In many temperature positions, the BI-LEVEL mode is designed to provide cooler air out of the headliner outlets and warmer air from the floor outlets. Floor Mode Air comes from the floor outlets. Summer Operation The engine cooling system in air conditioned vehicles must be protected with a high-quality antifreeze coolant to provide proper corrosion protection and to protect against engine overheating. A solution of 50% ethylene glycol antifreeze coolant and 50% water is recommended. Refer to "Maintenance Procedures" in Section 7 of this manual for proper coolant selection.