2006 Dodge Ram 1500 Pickup Owner's Manual - Page 180

180 UNDERSTANDING THE FEATURES OF YOUR VEHICLE C/T Button WARNING! Even if the display still reads a few degrees above 32°F ( 0°C), the road surface may be icy, particularly in woods or on bridges. Drive carefully under such conditions to prevent an accident and possible personal injury or property damage. Automatic Compass Calibration This compass is self-calibrating which eliminates the need to manually set the compass. When the vehicle is new, the compass may appear erratic and the CAL symbol will be displayed. After completing up to three 360° turns, with the vehicle traveling less than 5 mph (8 km/h), in an area free from large metal or metallic objects, the CAL symbol will turn off and the compass will function normally. Use this button to select a readout of the outside temperature and one of eight compass headings that indicate the direction in which the vehicle is facing.