Citroen C8 2008 1.G Workshop Manual

54 II
Operation in automatic mode
Automatic changing between the
4 or 6 gears.
Selector on
D.
The gearbox always selects the
gear best adapted to the following
parameters:
- style of driving,
- route proile,
- vehicle load.
The gearbox then operates in
automatic mode, without requiring
any action on your part.
Notes:
When braking, the gearbox
shifts down automatically to offer
effective engine braking.
The gearbox also enhances
your safety by not changing up
when you lift your foot from the
accelerator abruptly.
To obtain maximum acceleration
without touching the lever, press
rapidly down on the accelerator
pedal (kick down). The gearbox
will automatically change down or
maintain the selected gear up to
maximum engine speed. A U T O M A T I C G E A R B O X
Warning:
- Never select N function if the
vehicle is moving.
- Never select P or R if the vehicle
is not stationary.
- Do not change from one function to another to try to improve
braking on a slippery surface.
If, while the vehicle is moving,
function N is engaged inadvertently,
let the engine idle before engaging
a function that is appropriate. Snow programme
In addition to the automatic
programme, you have this special
programme which facilitates
starting and traction when road
grip conditions are poor.
Press button
, after you have
have started the vehicle and
selected function D;
The gearbox adapts to driving on
slippery roads.
Note:
You can return to the automatic
programme at any time:
Press button
once more to
deactivate the programme en-
gaged.
-speed gearbox (diesel engine):
when the vehicle is stationary
with the gear lever in position
D
(drive), a vibration limiting device
is activated when pressing the
brake pedal.

55
II
Operation in sequential mode
Manual changing between the 4
or  gears.
- Selector on M,
- push the selector towards the “+” sign to engage a higher
gear,
- pull the selector towards the “-”
to engage a lower gear.
A shift from D (automatic mode) to
M (sequential mode) is possible at
any time.
After selecting a gear, do not leave
your hand resting on the selector
for more than ten seconds ; risk of
cancelling the sequential function -
this is signalled by a lashing on
the instrument panel.
Consult your CITROËN dealer Note:
Changes from one gear to
another are only achievable when
conditions of vehicle speed and
engine speed allow. If they do not,
then the laws governing operation
of automatic gearboxes come into
play.
When you are stationary or moving
at very low speed, the gearbox
automatically selects irst gear.
The programme “
” (Snow)
does not apply in manual mode. Operational anomaly
Any operational disturbance is
signalled by a lashing in the
display.
In this case, the gearbox will
operate in emergency mode (third
gear is blocked). You will feel a
snatching when shifting from
P to
R and from N to R; this snatching
does no harm to your gearbox.
Do not exceed 100 km/h (approx.
0 mph).
Consult your CITROËN dealer
A U T O M A T I C G E A R B O X

5 II
Handbrake
The handbrake is operated by pulling the lever irmly up - pressing
the
footbrake will reduce the effort required to apply the hand brake.
The handbrake is capable of holding the vehicle on all slo pes likely to be
encountered but increased effort will be needed on steep sl opes.
In all circumstances, as a precautionary measure, engage irst gear. F or
vehicles equipped with an automatic gearbox, ensure that the parking
position (P) is selected.
On steep slopes, turn the steering towards the kerb.
To release the brake, pull the lever lightly up, press the bu tton on the end of the lever and return the lever to the
fully down position.
The warning lamp will come on if the handbrake is on or not fully released.
To position the parking brake lever horizontally along the loo r (Rotating the driver’s seat: see “Front seats”):
With the parking brake applied, pull the end A of the lever forwards. The lever lowers to horizontal to permit rotation
of the seat. In this coniguration, the warning lamp remains o n provided the brake remains applied.
To revert to normal operation, pull the lever upwards until t he ratchet comes into play.
Handbrake released , the lighting of this warning lamp together with the STOP warning lamp, accompanied
by a message on the multifunction display and by an audible signal, indicates that the brake luid level is
too low or that the brakeforce distribution is malfunctioning .
It is essential to stop the vehicle.
Contact a CITROËN dealer as soon as possible. B R A K E S

57
II
ABS - Anti-lock Braking System
This system improves vehicle safety by preventing the wheels from lockin
g under emergency braking or
when braking on surfaces offering poor adhesion. It thus allo ws control of the steering to be retained.
The operational capacity of the various electrical components of the ABS is continuously monitored, both before
and during your journey. On switching on the ignition, th e ABS warning lamp will light up and then should go out
after a few seconds.
If the warning lamp stays on, this means that the ABS has been disconnected because a fault was detected. If
the warning lamp lights up when you are driving, this means t hat the ABS system is not active. In either case, the
normal braking system remains effective, as on a vehicle without ABS. Nevertheless, to restore the additional
safety afforded by correct functioning of ABS, it is recommended tha t the vehicle be taken to a CITROËN dealer
as soon as possible.
On slippery roads (loose stones, snow, ice, etc.), it remains essenti al to drive with caution.
Emergency braking assistance system
This system enables you in an emergency to achieve the optimum braki ng pressure, thus to reduce the stopping
distance. It is triggered by your speed of action on the brake pedal, which reduces its resistance to that action.
Keep the brake pedal pressed until the vehicle comes to a stop. B R A K E S
State of wear of brake discs and drums
For all information relating to checks on the state of wear of brake discs and drums, contact a CITROËN dealer.

5 II
Operation
When either the ESP or ASR system is brought into operation, the ESP/
ASR warning lamp lashes.
Deactivation
In exceptional conditions (vehicle stuck in snow, soft ground, e tc.) it may
prove useful to deactivate the ESP/ASR system to allow the wheels to spin
and thus regain traction.
- press control A.
- The ESP/ASR warning lamp lights up, accompanied by an audible signal
and the message ESP/ASR DEACTIVATED on the multifunction screen.
Then the ESP/ASR systems are no longer active.
The ESP/ASR systems will redeploy:
- automatically if the ignition has been switched off or as soon as the
vehicle reaches approx. 50 km/h (approx. 30 mph),
- manually by a renewed press on the control A.
Operational anomaly
If the system is malfunctioning, ESP/ASR warning lamp lights up al ong
with the SERVICE warning lamp, a beep and the message “ESP/ASR
FAULT” on the multifunction screen.
Consult a CITROËN dealer to have the system checked.
Electronic Stability Programme (ESP) and Traction Control (ASR)
These systems are closely connected to the ABS and additional to i
t. In
the event of a loss of control of the vehicle by the driver, the ESP system
acts automatically on one or more brakes and also on the engine to bring
the vehicle back on trajectory. The ASR system optimises traction and
prevents wheel spin by acting on the brakes of the driving whe els. It also
improves steering stability during acceleration. E L E C T R O N I C S T A B I L I T Y P R O G R A M M E
Safety recommendations
The ESP system offers increased
driving safety but is not in place
to encourage the driver to take
additional risks or to drive at
excessive speeds.
The functioning of this system is
subject to compliance with the
manufacturer’s recommendations
on wheels (tyres and rims), brake
parts and electronic components,
as well as with CITROËN’s
assembly and repair procedures.
After any collision, have this
system checked by a CITROËN
dealer.

5
II
Complementary to the catalytic converter, this ilter makes an active
contribution to the preservation of air quality
by retaining the unburnt pollutant particles. Black exhaust fu mes are thus no longer emitted.
Clogging of the particle ilter
If there is risk of clogging, a message appears on the multifun ction display, accompanied by a sound signal and
lighting of the SERVICE warning lamp.
This alert tells you that the particle ilter is starting to ill up (in conditions of urban driving of exceptionally long
duration: low speeds, trafic jams etc.)
To regenerate the ilter, it is advised to drive as soon as possi ble, when trafic conditions permit, at a speed of
60 km/h (around 40 mph) or more for at least ive minutes (until the alert message disappears).
If this alert persists, consult a CITROËN dealer.
Observation: After prolonged idling or driving at very low speeds, you may occa sionally notice water vapour being
emitted from the exhaust when accelerating. This is of no conse quence to the running of the vehicle or to the
environment.
Diesel fuel additive level
If the additive level becomes too low, a message appears on the multifunction display, accompanied by a sound
signal and lighting of the SERVICE warning lamp. It is necessary to have the additive level topp ed up. Urgently
consult a CITROËN Dealer. D I E S E L P A R T I C L E F I L T E R

0 II
This driving assistance device enables you to drive at a constant
speed of
your choice, without any action required on the accelerator.
Cruise control is available above speeds of 40 km/h (25 mph), in the higher
gears only.
Control A for cruise control is located below the lighting/signalling stalk.
Note: The information relating to the cruise control is displayed on the
instrument panel screen at B.
To select the function
Turn the control 1 to the “CRUISE” position.
To select a cruise speed On selection of the function via control 1, no cruise
speed has yet been memorised .
Once you have accelerated to reach your desired speed, give a short
press on button 2 or 4.
The cruise speed is then memorised. It is displayed
on the instrument panel screen B.
You can then release the accelerator pedal. The vehicle will automatically
keep to that chosen speed.
Notes:
The vehicle speed may vary slightly from that memorised.
If while cruise control is operating the system is unable to kee p to the
memorised speed (e.g. on a steep descent), then this speed lashes. Adapt
your speed as necessary. C R U I S E C O N T R O L

1
II
These actions do not cancel the cruise speed which
remains displayed on the screen.
Reactivation of cruise control

- By recalling the memorised cruise speed:
After a deactivation, press button 3.
Your vehicle returns automatically to the memorised
cruise speed which is displayed on the instrument
panel screen B.
If the memorised cruise speed is higher than the speed
at which you are currently travelling, the vehicle will
accelerate strongly to compensate.
- By selection of the current speed:
Press briely on button 2 or 4 when you are at your
desired speed.
The information “OFF” will then disappear from the
screen.
To cancel the function
- By moving the control from “CRUISE” position to
position 0.
- By stopping the engine.
The speed previously chosen is no longer
memorised.
In the event of a malfunction , a message is displayed,
accompanied by a sound signal and lighting of the
SERVICE warning lamp.
Consult your CITROËN dealer.
Cruise control must only be used where road conditions permit driving at a constant speed.
Do not use it on congested roads or when weather and ro ad conditions are poor.
The driver must still remain attentive and in complete co ntrol of the vehicle.
You are recommended to keep your feet within range of the pedals.
To exceed the cruise speed temporarily
While cruise control is operating, it is still possible to
go above the cruise speed by actioning the accelerator
pedal (for example to overtake another vehicle). The
speed displayed on the screen lashes. You have
only to release the accelerator pedal to return to the
memorised speed.
Adjusting the cruise speed while cruise control is
in operation
You can adjust the cruise speed,
displayed in zone B,
by pressing:
- Button 4 to increase the speed.
- Button 2 to reduce the speed.
Note: you can use successive presses to modify the
cruise speed in steps of 1 mph and a continuous press
to jump in steps of 5 mph.
Deactivation of cruise control with memorised
speed
- Either with a press on the brake pedal or clutch pedal.
- Or if ESP or ASR are activated.
- Or with a press on button 3.
Note: cruise control is disengaged when the gear lever
is in neutral position.
These actions bring up the dis-
play “OFF” in the instrument
panel screen. C R U I S E C O N T R O L

2 II
This driving assistance device allows you to choose a maximum speed.
This has to be over 30 km/h (approx. 20 mph).
Control
A for the speed limiter is situated below the lighting/sign alling
control stalk.
Note: The information relating to the speed limiter is displayed in the
instrument panel screen at B.
To select the function
Turn control 1 to position “LIMIT”.
On selection of the function via control 1, the last
speed memorised is displayed.
The information “OFF” then disappears from the
screen.
To adjust the maximum speed
Provided the engine is running, you can adjust the memorised spe
ed by
pressing:
- button 4 to increase the memorised speed,
- button 2 to decrease the memorised speed.
Note: you can use successive presses to modify the cruise speed in steps
of 1 mph and a continuous press to jump in steps of 5 mph.
To activate the speed limiter
If the desired limit speed is displayed, press button 3 to activate this limit.
While the function is active, pressing the accelerator pedal w ill not enable
you to go beyond the programmed speed unless you press the pedal
hard down past the tight spot (see “Temporary exceeding of the maximum
speed”).
Note: The vehicle speed may vary slightly from that memorised. S P E E D L I M I T E R

3
II
To deactivate the speed limiter
Press button
3 located on the end of control A.
A mat not approved by CITROËN risks sliding under the a ccelerator pedal, thus preventing you
from pressing past the tight spot.
It will then be impossible to exit from your speed limita tion, unless by resorting to the control
under the steering wheel.
The driver must still remain attentive and in complete co ntrol of the vehicle.
This action causes the information
“OFF” to appear in the instrument panel screen.
The memorised speed remains displayed and is not cancelled.
Temporary exceeding of the maximum speed
You can exceed the memorised maximum speed at any time by pressing th e accelerator pedal hard down past the
tight spot.
During the time the limit speed is being exceeded, the dis played speed lashes.
Simply release the accelerator pedal to return below the limit speed and make the function active again.
Note: if during use of the speed limiter the system is not able to retain the memorised speed (e.g. on a steep
descent), then the speed lashes. If necessary, adjust your driving speed.
The function will re-engage when your speed is again below the desired limit speed.
To cancel the function
- By moving the control from position “LIMIT” to position 0.
- By stopping the engine.
The speed previously chosen is memorised.
In the event of a malfunction , a message is displayed, accompanied by a sound signal and lig hting of the
SERVICE warning lamp. Consult your CITROËN dealer. S P E E D L I M I T E R