CITROËN C3 Handbook page 36

Instruments
Resetting the service indicator
After each service, the service indicator must
be reset to zero.
If you have carried out the service on your
vehicle yourself, switch off the ignition:
F Press and hold this button,
F Switch on the ignition; the distance
recorder display begins a countdown,
F When the display indicates "=0", release
the button; the spanner disappears.
If you have to disconnect the battery
following this operation, lock the vehicle
and wait at least five minutes for the
reset to be registered.
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Retrieving the service
information
You can access the service information at any
time.
F Press this button.
The service information is displayed for a few
seconds, then disappears.