CITROEN DS4 Owner's Handbook Manual page 210

Moving off
With your foot on the brake, select
position P or N .
Start the engine.
If this procedure is not followed, there is an
audible signal, accompanied by a message in
the multifunction screen.
With the engine running, press the brake
pedal.
Release the parking brake, unless it is
programmed to automatic mode.
Select position R , D or M ,
Gradually release the brake pedal.
The vehicle moves off immediately.
If position N is engaged inadvertently
while driving, allow the engine to
return to idle then engage position D to
accelerate.
When the engine is running at idle, with
the brakes released, if position R , D or
M is selected, the vehicle moves even
without the accelerator being pressed.
When the engine is running, never
leave children in the vehicle without
supervision.
When carrying out maintenance with
the engine running, apply the parking
brake and select position P .
Automatic operation
Select position D for automatic changing
of the six gears.
The gearbox then operates in auto-adaptive
mode, without any intervention on the part
of the driver. It continuously selects the most
suitable gear according to the style of driving,
the profile of the road and the load in the
vehicle.
For maximum acceleration without touching
the lever, press the accelerator pedal down
fully (kick down). The gearbox changes down
automatically or maintains the gear selected
until the maximum engine speed is reached.
On braking, the gearbox changes down
automatically to provide efficient engine
braking.
If you release the accelerator sharply, the
gearbox will not change to a higher gear for
safety reasons.
Never select position N while the
vehicle is moving.
Never select positions P or R unless
the vehicle is completely stationary.