Lexus 2015 CT200H Owner's Manual page 449

Calibrating the compass
The direction display deviates from the true direction determined by the earth' s
magnetic field. The amount of deviation varies depending on the geographic
position of the vehicle.
If you cross over one of the map boundaries shown in illustration, the compass will
deviate.
To obtain higher precision or perfect calibration, refer to "Deviation calibration".
CT200h_OM_OM76134U_(U)
6-4. Using the other interior features
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