CITROËN DS5 Owner's Handbook Manual page 106

Special situations
In some circumstances (engine start...),
the parking brake may adjust the level of
application itself. This is normal operation.
To move your vehicle a few centimetres
without starting the engine, with the ignition
on, press the brake pedal and release the
parking brake by pulling then releasing
the control lever A . Complete release of the
parking brake is indicated by the warning
lamps in the control lever A and in the
instrument panel going off and by the display
of the message "Parking brake off".
In the event of a malfunction of the parking
brake in the on position or a battery failure,
manual release remains possible possible.
To ensure correct operation, and so
your safety, the number of successive
applications and releases of the parking
brake is limited to eight cycles.
If used excessively, you are alerted by
the message "parking brake faulty" and a
flashing warning lamp.