2015 Citroen DS5 HYBRID4 Owner's Manual

19Hybrid4 system
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Mode selector
The selector allows the driver to select one of the four operating modes offered by the Hybrid4 system.  Turn the dial to the right or left; the mode selected is confirmed by illumination of the corresponding indicator lamp.
ZEV mode: for 100% electric running.
SPORT mode: to make use of the maximum per formance of the vehicle.
4WD mode: to force 4x4 drive.
AUTO mode: for everyday use and optimised fuel consumption.
By default, the selector is in the AUTO position when starting the Hybrid4 system, whatever position it was in when the ignition was switched off.
AUTO mode
This mode is designed to optimise the vehicle's fuel consumption by managing the alternate or simultaneous operation of the two motors according to the conditions and driving style. When conditions allow, an adequate battery state of charge and moderate acceleration, the alternator-starter motor stops the HDi Diesel engine to provide 100% electric running.

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ZEV mode
(all electric)
Zero emissions vehicle operation is assured 100 % by electric drive. This mode allows silent and clean running at moderate speeds.
It can be activated when the conditions allow, particularly if the state of charge of high voltage battery is sufficient (from 4 bars).
In AUTO mode, the electric motor : - can power the vehicle on its own in "zero emissions" electric running, depending on the state of charge of the battery, if the conditions specific to the vehicle are met and if acceleration is moderate, - supplements the HDi Diesel enginewhen moving off and changing gear, during acceleration or when traction from the front wheels is inadequate, temporarily providing 4-wheel drive. The electric motor can operate only at speeds below 52 mph (85 km/h). It is no longer active above 75 mph (120 km/h).
Refer to the special conditions for operation of ZEV m o d e .
For more information on the special conditions for the operation of ZEV mode, refer to the corresponding section.
If the conditions do not allow ZEV mode to be selected or maintained, the message " Electric mode is not currently available " appears in the screen. The ZEV indicator lamp flashes for a few seconds then goes off and the indicator lamp in the AUTO position comes on. In ZEV mode: ZEV mode: ZEV - range and acceleration capacity are limited; the maximum speed is around 36 mph (60 km/h), - under high load or a priority requirement causing the start of the HDi Diesel engine, the system changes automatically to AUTO m o d e .

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SPORT mode
(Diesel and
electric)
4WD mode
(4 - wheel
drive)
This mode allows more dynamic driving by providing additional performance . By using the capacity of the electric motor to supplement the power of the HDi Diesel engine, the vehicle's full power is used for acceleration and pick-up. This mode manages the response of the accelerator, the electronic gearbox and the use of the electric motor. In SPORT mode: - the electric motor as an addition is available up to 75 mph (120 km/h).
This "4-wheel drive" mode provides additional traction * at low speed by driving all four wheels of the vehicle simultaneously: the HDi Diesel engine (front wheel drive) and the electric motor (rear wheel drive) operate simultaneously and permanently. Their coupling is managed electronically to optimise traction when grip is poor. In 4WD mode: - the HDi Diesel engine operates continuously; if necessary, it supplies energy for the electric motor, - the additional traction from the electric motor is available up to 75 mph (120 km/h).
This mode should be used on snow covered roads or difficult ground (mud, sand, ...), as well as for crossing a ford, at moderate speed. In this mode, in severe conditions and if the circumstances allow, it is recommended that you accelerate strongly to facilitate moving off and making progress and so reduce the risk of getting stuck. The addition of 4WD traction is available whatever: - the state of charge of the 12 V
battery, - t h e a l t i t u d e .
* This mode will be even more effective if the vehicle is fitted with tyres suitable for winter conditions.

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ECO OFF function
This function prevents the HDi Diesel engine being switched off and so ensures that a comfortable temperature can be maintained in the passenger compartment (air conditioning running continuously). On pressing the ECO OFF switch, the HDi Diesel engine restarts immediately. To return to normal operation, press this switch again. After switching off the ignition, the vehicle will return to normal operation (lamp in the switch off).
* E x c e p t i n ZEV mode, which gives preference to electric running over maintaining a comfortable temperature.
During electric running and when the engine is stopped, the hybrid system manages restarting automatically to maintain the temperature in the passenger compartment * . However, variations in temperature may still be felt in very hot climates. To avoid any discomfort in these conditions you can operate the ECO OFF s w i t c h .

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A few driving recommendations
Observe the driving regulations at all times and remain vigilant whatever the traffic conditions. Pay close attention to the traffic and keep your hands on the wheel so that you are ready to react at any time to any eventuality. On a long journey, a break every two hours is strongly recommended. In difficult weather, drive smoothly, anticipate the need to brake and increase the distance from other vehicles.
Driving on flooded
roads
We strongly advise against driving on flooded roads, as this could cause serious damage to the internal combustion engine or electric motor, the electronic gearbox, or the electrical systems of your vehicle.
If you are obliged to drive through water:
- check that the depth of water does not exceed 15 cm, taking account of waves that might be generated by other users, - place the mode selector in the 4WDposition, - drive as slowly as possible without stalling. In all cases, do not exceed 6 mph (10 km/h), - do not stop and do not switch off the
engine. On leaving the flooded road, as soon as circumstances allow, make several light brake applications to dry the brake discs and pads. If in doubt on the state of your vehicle, contact a CITROËN dealer or a qualified workshop.
Important!
Never drive with the parking brake applied - Risk of overheating and damage to the braking system! Do not park or run the engine when stationary in areas where inflammable
substances and materials (dry grass, dead leaves...) might come into contact with the hot exhaust system or certain components of the Hybrid4 system which can reach very high temperatures - Risk of fire!
Never leave a vehicle unsupervised with the engine running. If you have to leave your vehicle with the engine running, apply the parking brake and put the electronic gearbox into position N .

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Eco-driving
Eco-driving is a range of everyday practices that allow the motorist to optimise their fuel consumption and CO2 emissions.
Adapted to your Hybrid4 vehicle
Use gear selector position A , as this optimises gear changes to suit the circumstances, and the AUTO mode of the Hybrid4 mode selector. When moving off, accelerate normally up to the desired speed ( POWER zone between 20 and 40 %). At steady speeds, drive gently with small movements of the accelerator pedal ( ECO or CHARGE zone), run in electric mode as often as possible when driving at low speed. Anticipate the need to slow down and use engine braking ( CHARGE zone), so as to make use of free energy recovery while keeping light pressure on the accelerator pedal.
For information on other eco-driving practices, refer to the corresponding section of the handbook for the vehicle.

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Special conditions for the operation of ZEV mode
ZEV mode can be selected when all of the conditions for its operation are met, in particular an adequate state of charge of the battery (50% at least). In the situations described below, the HDi Diesel must be running; accordingly, ZEVmode cannot be selected or is deactivated automatically. The mode selector remains at or returns to the AUTO position to allow starting of the HDi Diesel engine, as required.
- Manual gear change when in automatic mode using the steering mounted controls for the electronic gearbox.
Cases of non availability of ZEV mode or automatic return
to AUTO mode
- Selection of manual mode by moving the gear selector for the electronic gearbox to position M .
- Sustained and sharp acceleration.
- Use of demisting / defrosting.
- Intensive use of air conditioning.
Action by the driver:

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Unsuitable circumstances:
- If the state of charge of the high voltage battery is lower than 4 bars (equal to 50% charged). In AUTO mode, electric operation is possible with a lower state of charge.
- When the speed of the vehicle exceeds 18 mph (30 km/h), if the internal combustion engine has not already started at least once since the Hybrid4 system was started.
- When the fuel level enters the reserve zone (illumination of the low fuel warning lamp). Where this reserve is is being used up quickly, ZEV may not be possible for some time after refuelling.
- During phases of regeneration of the particle filter (FAP), which is automatically triggered approximately every 300 miles (500 kms) for a period of about 10 minutes. During regeneration of the particle filter, the particles a brought up to a high temperature using the HDi Diesel engine; A message is then displayed: " Electric mode not available: FAP regeneration " .
Maintaining the performance of the system:
- If certain conditions or engine temperature requirements needed by the HDi Diesel engine are not met (for example, in wintry conditions).
- Following a prolonged period with the vehicle parked in the sun.
- When the state of charge of the high voltage battery is close to the maximum level (for example: when going down a long hill using the electric motor for braking), recovery of the vehicle's kinetic energy being no longer possible, the HDI Diesel engine restarts automatically just to provide engine braking.
- On a steep rising slope.
- D r i v i n g a t a l t i t u d e .