CITROEN DS4 Owner's Handbook Manual page 76

A few definitions...
Range
(miles or km)
This indicates the distance
which can still be travelled with the fuel
remaining in the tank in relation to the average
fuel consumption over the last few miles
(kilometres) travelled.
This value may vary following a change
in the style of driving or the relief,
resulting in a significant change in the
current fuel consumption.
When the range falls below 20 miles (30 km),
dashes are displayed. After filling with at least
5 litres of fuel, the range is recalculated and is
displayed when it exceeds 60 miles (100 km).
If dashes are displayed continuously
while driving in place of the digits,
contact a CITROËN dealer or a
qualified workshop.
Current fuel
consumption
(mpg or l/100 km or km/l)
This is the average fuel consumption during the
last few seconds.
This function is only displayed from
20 mph (30 km/h).
Average fuel
consumption
(mpg or l/100 km or km/l)
This is the average fuel consumption since the
last trip computer zero reset.
The fuel consumption of your vehicle will
be higher than the official figures obtained
by CITROËN during the first 3 000 miles
(5 000 km) of the vehicle's life.
Average speed
(mph or km/h)
This is the average speed calculated
since the last trip computer zero reset
(ignition on).
Distance travelled
(miles or km)
This indicates the distance
travelled since the last trip computer zero reset.
Stop & Start time
counter
(minutes/seconds or hours/
minutes)
If your vehicle is fitted with Stop & Start, a time
counter calculates the time spent in STOP
mode during a journey.
It resets to zero every time the ignition is
switched on with the key.