CITROËN DS5 Owner's Handbook Manual page 118

Going into engine START mode
The "ECO" warning lamp goes off
and the engine starts automatically:
- with a manual gearbox , when you fully
depress the clutch pedal,
- with an electronic gearbox :
● gear lever in position A or M , when you
release the brake pedal,
● or gear lever in position N and brake
pedal released, when you place the gear
lever in position A or M ,
● or when you engage reverse.
- with an automatic gearbox :
● gear lever in position D or M , when you
release the brake pedal,
● or gear lever in position N and brake
pedal released, when you place the gear
lever in position D or M ,
● or when you engage reverse.
Special cases: START invoked
automatically
START mode is invoked automatically when:
- the driver's door is open,
- the driver's seat belt is not fastened,
- the speed of the vehicle exceeds 15 mph
(25 km/h) with a manual gearbox (2 mph
(3 km/h) with the Blue HDi 120 version),
7 mph (11 km/h) with an electronic gearbox
and 2 mph (3 km/h) with an automatic
gearbox.
- the electric parking brake is being applied,
- some special conditions (battery charge,
engine temperature, braking assistance,
ambient temperature...) where the engine is
needed for control of a system.
In this case the "ECO" warning lamp
flashes for a few seconds, then goes
off.
This operation is perfectly normal.
Deactivation
At any time, press the "ECO OFF" switch to
deactivate the system.
This is confirmed by the switch warning lamp
coming on accompanied by a message in the
screen.
If the system has been deactivated
in STOP mode, the engine restarts
immediately.