CITROËN DS 4 Handbook page 196

Automatic application,
engine off
With the vehicle stationary, the parking brake
is automatically applied when the engine is
switched off.
The application of the parking brake is
confirmed by:
illumination of the braking warning
-
lamp and of the P warning lamp in
the control lever A,
- display of the message "Parking
brake on".
Before leaving the vehicle, ensure
that parking brake warning lamp in
the instrument panel is on fixed (not
flashing).
Never leave a child alone inside the
vehicle with the ignition on, as they
could release the parking brake.
In the case of towing, a loaded vehicle
or parking on a gradient, turn the front
wheels towards the pavement and
engage a gear when you park.
Automatic release
The electric parking brake releases
automatically and progressively when you
press the accelerator:
F Manual gearbox: press down fully on the
clutch pedal, engage first gear or reverse,
press on the accelerator pedal and move
off.
F Automatic gearbox: select position d, M
or R then press the accelerator pedal.
Full release of the parking brake is confirmed
by:
- the braking warning lamp and
the P warning lamp in the control
lever A going off,
- display of the message "Parking
brake off".
When stationary, with the engine running, do
not press the accelerator pedal unnecessarily,
as you may release the parking brake.