2008 Dodge Ram 2500 Pickup Owner Manual - Page 262

260 UNDERSTANDING YOUR INSTRUMENT PANEL NOTE: To improve your selection choices, the system allows you to operate at intermediate positions between the major modes. These intermediate positions are identified by the small dots. Panel Outside air flows through the outlets located in the instrument panel. Recirculation Modes (Panel or Bi-Level) Select the recirculation modes when the outside air contains smoke or odors. This feature allows for recirculation of interior air only. Air flows through the panel outlets in this mode. Air flows through the panel only, or through both the panel and floor vents depending on the selected mode (panel vs bi-level). Bi-Level Outside air flows through the outlets located in the instrument panel and at the floor. Mix Outside air flows in equal proportions through the floor and defroster outlets. Defrost Outside air is primarily directed to the windshield through the defroster outlets located at the base of the windshield, and the demister outlets located at the edge of each side of the instrument panel.