Vauxhall Agila Owner's Manual page 65

64 Instruments and controls
Setting units of measure
You can select which units of
measure are to be used for fuel
consumption figures.
With the vehicle stationary and with
instantaneous consumption showing
in the display, press and hold the
MODE button for a few seconds to
toggle between gal/h and mpg.
Interruption of power supply
If the power supply has been
interrupted or if the battery voltage
has dropped too low, the values
stored in the trip computer will be lost.