2009 JAGUAR XF Def

161
Adaptive cruise control (ACC)

The vehicle will then maintain the constant time
gap to the vehicle ahead until:
•The vehicle ahead accelerates to a speed
above the set speed.
• The vehicle ahead moves out of lane or out
of view.
• A new gap distance is set.
If necessary, the vehicle brakes will be
automatically applied to slow the vehicle to
maintain the gap to the vehicle in front.
The maximum braking which is applied by the
ACC system is limited and can be overridden by
the driver applying the brakes, if required.
Note: Driver braking will cancel ACC.
If the ACC system predicts that its maximum
braking level will not be sufficient, then an
audible warning will sound while the ACC
continues to brake. DRIVER INTERVENE will be
displayed on the message centre. The driver
should take immediate action.
When in follow mode, the vehicle will
automatically return to the set speed when the
road ahead is clear, for instance when:
• The vehicle in front accelerates or changes
lane.
• The driver changes lane to either side or
enters an exit lane.
The driver should intervene if appropriate.
Changing the follow mode set gap
The gap from the vehicle ahead can be
decreased or increased by rolling the
thumbwheel on the stee ring wheel. Four gap
settings are available and the selected gap
setting will be displaye d on the message centre
when either ACC button is pressed. Each gap level is indicated by an
additional
chevron in front of th e vehicle icon in the
message centre (one chevron (gap level 1)
being the shortest, four chevrons (gap level 4)
being the longest). A fter the ignition is
switched on, the default gap (gap level 3) will
be automatically selected ready for ACC
operation.
Note: When the ignition is switched off, the
gap setting will revert to the default setting
(gap level 3) when switched on again.
Note: It is the driver’s responsibility to select a
gap appropriate to the driving conditions.
Overriding the speed and follow mode
The set speed and gap ca n be overridden by
pressing the accelerator pedal when cruising at
constant speed or in follow mode. If the vehicle
is in follow mode, the instrument warning
indicator will go out when the ACC is
overridden by the driver using the accelerator
and CRUISE OVERRIDE will be displayed on
the message centre. When the accelerator is
released the ACC functi on will operate again
and vehicle speed will decrease to the set
speed, or a lower spee d if follow mode is
active.
WARNING
Whenever the driver is overriding the
ACC by depressing the accelerator
pedal, the ACC will not automatically
apply the brakes to ma intain separation from
any vehicle ahead.

169
Driving dynamics

GENERAL INFORMATION
JaguarDrive Control
JaguarDrive Control is a selectable vehicle
optimisation system, designed to fine-tune the
driving characteristics of the vehicle by
accommodating different dr iving conditions or
driving styles.
The system allows the performance envelope
of the vehicle to be stretched and prevents the
necessity for a single, compromised
configuration for all conditions, thereby
increasing the vehicle's abilities.
The vehicle systems optimised by JaguarDrive
Control are:
• Engine management.
• Transmission management.
• Dynamic Stability Control and traction
control.
• Adaptive dynamics.
• Active Differential Control (E-diff) -
Supercharged vehicles only.
Note: Changing from one special mode to
another, will introduce noticeably different
vehicle responses. For example, the engine
revs produced by the accelerator position when
a special mode is not selected, may increase or
decrease when a mode is selected.
To familiarise y ourself with, and get the best
from, the JaguarDrive Control modes, you
should try out the mode s in circumstances
which are safe for you and other road users. 1.
Dynamic mode switch.
2. Winter mode switch.
3. DSC mode switch.
WINTER MODE
Press to operate. Designed for use
in slippery conditi ons, when active,
Winter mode selects 2nd gear for
driving away on level ground (no incline),
softens the responsiveness of the engine and
modifies the gear ch ange strategy. This
ensures that optimum traction is maintained.
Winter mode optim ises stability of the vehicle
to suit slippery conditions, when grip is
reduced. The vehicle perfor ms in a more gentle
and controlled manner, to avoid skidding,
allowing more confident progress under
adverse conditions.
Note: Winter mode cannot be active at the
same time as Dynamic mode. Winter mode will
remain selected indefinite ly after the ignition is
switched off, until deselected by the driver.
WARNING
It remains the driver's responsibility
to drive safely, according to the
prevailing conditions and within the
law.
JAG1654
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173
Driving dynamics

JaguarDrive Control scenarios
The table below gives examples of the drive control settings suggested for different driving
scenarios.
Scenario Suggested driver selection Tyre fitment JaguarDrive ControlDynamic
Stability Control (DSC) Transmission
Wet grass Standard Winter mode DSC On
(default)Drive (D)
Very wet tarmac
Slippery boat launch
ramp
Hill descents while
towing on slippery
surfaces Sport (S) +
Manual
Ice/light snow Standard or All
Season tyres Drive (D)
Snow ploughed
hard-topped roads
(including black ice) All Season tyres
Packed snow roads Winter tyres
Deep fresh snow Snow chains Sport (S)
Normal driving
conditions (e.g. dry
tarmac, town driving,
motorway cruising
etc. ) Standard
No driver
selection
required.
Special modes off. Drive (D)
Overtaking on a dry
road Drive (D) or
Sport (S)
Pulling out onto a
busy road in dry
conditions
Favourite country
lane (public road) Dynamic mode Sport (S)
or
Sport (S) + Manual
Private track/race
day TracDSC
(where conditions
permit)

217
Wheels and tyres

11.Wear rate indicator. A tyre rated at 400 for
example, will last twice as long as a tyre
rated at 200.
12. The traction rating grades a tyres
performance when stopping on a wet road
surface. The higher the grade the better the
braking performance. The grades from
highest to lowest are, AA, A, B, and C.
13. The maximum load which can be carried
by the tyre.
14. Heat resistance grading. The tyre's
resistance to heat is grade A, B, or C, with
A indicating the greatest resistance to heat.
This grading is provided for a correctly
inflated tyre, which is being used within its
speed and loading limits.
15. The maximum inflation pressure for the
tyre. This pressure should not be used for
normal driving.
† Speed ratings
TYRE CARE
Tyre pressures
Rating Speed km/h (mph)
Q 160 (99)
R 170 (106)S 180 (112)
T 190 (118)
U 200 (124)
H 210 (130)
V 240 (149)
W 270 (168) Y 300 (186)
WARNINGS
Defective tyres are dangerous. Do not
drive the vehicle if a tyre is damaged,
excessively worn, or incorrectly
inflated. Doing so may lead to premature tyre
failure.
Avoid contaminating the tyres with
vehicle fluids as they may cause
damage to the tyre.
Avoid spinning the wh eels. The forces
released can damage the structure of
the tyre and cause it to fail. Doing so
may lead to premature tyre failure.
If wheel spin is unavoidable due to a
loss of traction (i n deep snow, for
example), do not exceed the 50 km/h
(30 mph) point on the speedometer. Doing so
may lead to premature tyre failure.
Do not exceed the maximum pressure
stated on the sidewall of the tyre.
Over-inflation could cause the tyre to
fail suddenly.
WARNINGS
Never drive your vehicle if the tyre
pressures are incorrect.
Under-inflation causes excessive
flexing and uneven tyre we ar. This can lead to
sudden tyre failure. Ov er-inflation causes a
harsh ride, uneven tyre wear and poor
handling.
Pressure checks should only be
carried out when the tyres are cold,
and the vehicle has been stationary
for more than three hours. A hot tyre at or
below recommended cold inflation pressure is
dangerously under-inflated.

Wheels and tyres
218

All of the vehicle's tyres (including the spare)
should be checked regularly for damage, wear
and distortion. If you are in any doubt about the
condition of a tyre, have it checked immediately
by a tyre repair centre or your
Dealer/Authorised repairer.
Checking the tyre pressures
The recommended tyre pressures are listed on
a placard label fixed to the end of the left-hand
side door. These pressures provide optimum
ride and handling charac teristics for all normal
operating conditions.
If winter tyres are fitted, please refer to the
winter tyre pressure information. SeeUSING
WINTER TYRES (page 223).
In the interest of safe ty, reliability and fuel
efficiency, check the tyres, including the spare,
for condition and pressu re on a weekly basis
and before long journeys.
Do not check tyre pressures immediately after
the vehicle has travelled in excess of 1.6 km
(1.0 mile). Tyre temperatures and pressures
increase when running. Deflating a warm tyre
to the recommended pressure will result in
under-inflation.
If tyre pressures are checked while the vehicle
is inside a protected covered area, e.g. a
garage, and subsequent ly driven in lower
outdoor temperatures, tyre under-inflation
could occur.
A slight pressure loss occurs naturally with
time. If this exceeds 0.14 bar (2 lbf/in², 14 kPa,)
per week, have the cause investigated and
rectified by qualified assistance.
Tyre pressures (including the spare) should be
checked at least once a week with normal
on-road use, but should be checked daily if the
vehicle is used off-road. Always check the tyre
pressures before setti ng off on a long journey.
If it is necessary to check tyre pressures when
the tyres are warm, you should expect the
pressures to have increased by up to
0.3-0.4 bar (4-6 lbf/in², 30-40 kpa). Do not
reduce the tyre pressures to the cold inflation
pressure under these circumstances. Allow the
tyres to cool fully before adjusting the
pressures.
If the vehicle has been parked in
strong sunlight, or used in high
ambient temperatures do not reduce
the tyre pressures. move the vehicle into the
shade and allow the tyres to cool before
re-checking the pressures.
WARNING
Tyre pressures should be checked
regularly using an accurate pressure
gauge, when the tyres are cold.
Failure to properly maintain your tyre
pressures could increase the risk of tyre failure
resulting in loss of vehicle control and
personal injury.
WARNINGS
E95180

221
Wheels and tyres

Wear indicators
When the tread has worn down to
approximately 2 mm, wear indicators start to
appear at the surface of the tread pattern. This
produces a continuous band of rubber across
the tread as a visual indicator.
To maintain performance and grip the tyre
must be replaced as soon as the wear indicator
becomes visible. Sooner, if legislation requires
replacement at a greater tread depth.
Note: Tread depth should be checked
regularly, in some case more frequently than
the service intervals. For advice on checking
tyres contact your Dealer/Authorised repairer
or a tyre dealer.
Age degradation
Tyres degrade over time due to the effects of
ultraviolet light, extreme temperatures, high
loads, and environmen tal conditions. It is
recommended that tyres are replaced at least
every six years, but they may require
replacement more frequently.
Jaguar recommends that even if unused, the
spare tyre be replaced at the same time as the
four road tyres.
Punctured tyres
Tyre checks
Not all punctures result in the tyre deflating
immediately. Therefore, it is important to check
the tyres for damage and foreign objects,
regularly.
When driving, if a sudden vibration, or change
to the vehicle's hand ling is noticed, reduce
speed immediately. Do not brake hard, or make
any sudden manoeuvres or direction changes.
Drive slowly to an area off the main highway
and stop the vehicle.
Note: Driving the vehicle to a safe area may
cause damage to th e punctured tyre, but
occupant safety is far more important.
Inspect the tyres for signs of punctures,
damage or under inflati on. If any damage or
deformity is detected, the tyre should be
replaced. If a spare tyre is not available, then
the vehicle should be reco vered to a tyre repair
centre, or Dealer/Approved repairer.
WARNING
Wear indicators show the minimum
tread depth recommended by the
manufacturers. Tyres which have
worn to this point will have reduced grip and
poor water displacement characteristics.
CAUTION
If tread wear is uneve n across a tyre, or
the tyre wears excessively, the vehicle
should be checked by your Dealer/Authorised
Repairer as soon as possible.
E91698
WARNING
Do not drive the vehicle with a
punctured tyre. Even if the punctured
tyre has not deflated, it is unsafe to
use, as the tyre may deflate suddenly at any
time. See TYRE REPAIR KIT (page 229).

Wheels and tyres
224

RUN FLAT TYRES
Run-flat tyres can be identified by the lettering
RSC on the sidewall. The tyre construction
utilises a specially reinforced sidewall, which
allows the vehicle to be driven at restricted
speeds, even when the tyre is depressurised.
Run-flat tyres can only be fitted to special rims,
constructed for ru n-flat tyre use.
A tyre pressure monitoring system is
mandatory when the vehicle is fitted with
run-flat tyres. See TYRE PRESSURE
MONITORING SYSTEM (page 234).
If the tyre has deflated, the vehicle should be
driven with caution, as handling characteristics
will be different compared to a fully inflated
tyre.
If the vehicle is fully la den with passengers and
luggage, the maximum di stance that can be
completed on a fully deflated tyre, is
approximately 80 kilo metres (50 miles).
Stop immediately if the tyre construction
begins to break down or if the tyre dislodges
from the wheel rim. Typi cally, this will be
accompanied by excessive vibration.
A tyre driven in a defl ated condition must be
replaced as s oon as possible. Vehicles fitted with run-flat tyres are not fitted
with a spare wheel or jacking equipment.
Therefore, run-flat tyre
s should be replaced
with the same type of tyre.
TOOL KIT
Tool kit contents
1. Jack.
2. Wheel brace.
3. Chock.
4. Locking wheel nut adaptor.
5. Towing eye.
Note: When returning the tool kit to its stowage
position, hook the T-bar of the clamp over the
jack handle, to se cure in position.
Note: The jack requi res occasional
maintenance. Examine the jack for wear,
damage or corrosion and lubricate the moving
parts.
WARNING
If a run-flat tyre is deflated, maximum
vehicle speed must not exceed
80 km/h (50 mph).
E91708
WARNING
After use, the tool kit should be
returned to the under floor storage
area and correctly stowed. Do not
leave the tool kit or it s components loose in the
storage area, as they can prove hazardous
during an impact or sudden manoeuvre.
E95183
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Wheels and tyres
230

Jaguar tyre repair kit safety information
WARNINGS
Some tyre damage may only be
partially sealed, or may not seal at all,
depending on the amount and type of
damage. Any loss of tyre pressure can
seriously affect vehicle safety.
Do not use the tyre repair kit if the tyre
has been damaged by driving while
under-inflated.
Only use the tyre repair kit to seal
damage located within the tyre tread
area.
Do not use the tyre repair kit to seal
damage to the tyre sidewall.
Do not exceed 80 km/h (50 mph)
when a repaired tyre is fitted to the
vehicle.
The maximum distan ce that should
be driven when a repaired tyre is
fitted, is 200 km (125 miles).
When a repaired tyre is fitted, drive
with caution and avoid sudden
braking or steering manoeuvres.
Only use the tyre repair kit for the
vehicle with which it was supplied.
Do not use the tyre repair kit for any
other purpose than tyre repair.
Never leave the tyre repair kit
unattended when in use.
Only use the tyre repair kit within the
-30 °C to +70 °C temperature range.
Always keep children and animals at a
safe distance from the tyre repair kit
when in use.
Do not stand dire ctly beside the
compressor when it is operating.Check the tyre sidewall prior to
inflation. If any cracks, damage or
deformities are apparent, do not
inflate the tyre.
Watch the tyre sidewall during
inflation. If any cracks, bumps or
similar damage, or deformities
appear, switch off the compressor and deflate
the tyre.
WARNINGS