VDO M4WL Operator's Manual page 39

M4 WL
Settings – total values – altitude loss
The second digit flashes. Press the BIKE button to
increase the value. Press the ALTI button to decrease
the value of this digit.
Press the SET button to confirm the value.
Once all the digits have been set, confirm the setting
by pressing the SET button.
The response "Set OK" appears on the display.
If you want to configure further settings,
press the BIKE or ALTI button to access these.
If you do not want to configure any further settings,
press and hold the SET or BIKE button.
The settings menu closes.
The VDO M4 WL returns to function mode.
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