Mercedes-Benz 2008 M-Class Operator's Manual page 175

Controls in detail
Control system
Press button j or k repeatedly
until the message Compass Setting
Zone appears in the multifunction
display.
The selection marker is on the current
setting.
Press button æ or ç to set the
respective compass zone.
For information on how to call up the
compass, see "Compass" ( page 307).
174
Compass calibration
i
Make sure you are in area where you can
drive a full circle with your vehicle without dis-
turbing traffic in order to calibrate the compass.
This function is not available if your vehicle
is equipped with the COMAND system and
navigation module*.
In order to calibrate the compass properly,
mind the following:
Calibrate the compass in open terrain.
Nearby buildings, bridges, power lines
and large antenna masts, for example,
could impair compass calibration.
Switch off electrical consumers (e.g.
climate control, windshield wipers, or
rear window defroster).
Close all doors and the tailgate.
Start the engine ( page 54).
Press button æ or ç to move
the selection marker to the
submenu.
Press button j or k repeatedly
until the message
Compass Calibration
multifunction display.
The selection marker is on setting
switched Off
Press button æ to set the selection
marker to Start
The following message appears in the
multifunction display:
Compass Calibration Active
Please drive in a full circle.
Vehicle
appears in the
.
.