CITROËN C-ZERO Handbook page 24

Monitoring
Resetting the service indicator to zero
After each service, the service indicator should
be rest to zero.
The procedures is as follows:
F Switch off the ignition (switch in the LOCK
or ACC position).
F Press the reset button A several times in
succession until the service indicator is
displayed.
F Press and hold the reset button for a few
seconds until the spanner flashes.
F Press the reset button while the spanner
is flashing to change the display from "---"
to "CLEAR".
The distance (or time) remaining before
the next service is due is displayed.
22
The display of "---", indicating that the
service date has arrived, comes on
automatically after a certain time and
distance travelled. The screen then
indicates the time remaining before the
next service is due.