Subaru Impreza 2.2L MT Owner's Manual page 173

NOTE
The compass may be affected by interference in the magnetic field. (For
example natural and artificial causes like tunnels, subways, sub-stations,
railways, and so forth may affect compass operation.)
B Compass setting
1. Deviation setting
Depending on your location, the following adjustment is required due
to the difference between magnetic and geographic North. Refer to
the map shown above for the setting most appropriate for your loca-
tion.
Interior equipment
HS6006CB
HS6009AB
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