CITROEN DS3 Handbook page 193

Running out of fuel (Diesel)
If your vehicle has an HDi engine, the fuel system must be primed if you run out of fuel.
This system consists of a priming pump and a transparent pipe under the bonnet.
F Fill the fuel tank with at least five litres of
Diesel.
F Open the bonnet.
F Depending on version, unclip the cover to
gain access to the priming pump.
F Squeeze and release the priming pump
until resistance is felt (could be from the
first application) and fuel appears in the
transparent pipe with the green connector.
F Operate the starter until the engine starts.
F Depending on version, put the cover back
in position and clip it in place.
F Close the bonnet.
If the engine does not start at the first
attempt, do not try again.
Operate the priming pump again, then
the starter.
BlueHdi 100 engine
F Fill the fuel tank with at least five litres of
Diesel.
F Switch on the ignition (without starting the
engine).
F Wait around 6 seconds and switch off the
ignition.
F Repeat the operation 10 times.
F Operate the starter to run the engine.
191
Practical information