Chrysler 2005 300 SRT8 Manual page 144

144 UNDERSTANDING YOUR INSTRUMENT PANEL
FUNCTION SELECT button to start the calibration. The
message "CAL" will appear in the EVIC. Complete one
or more 360° turns in an area free from large metal objects
until the "CAL" message turns off. The compass will now
function normally.
Compass Variance
Compass Variance is the difference between magnetic
North and Geographic North. In some areas of the
country, the difference between magnetic and geographic
North is great enough to cause the compass to give false
readings. If this occurs, the compass variance must be set.
NOTE: Magnetic materials should be kept away from
the overhead console. This is where the compass sensor is
located.