2004 PORSCHE CAYENNE engine

168
Driving and Driving Safety
DeceleratingOption 1
fPush operating lever down into position 4 until
the desired speed is reached.
The speed reached is maintained and stored
when the operating lever is released.
Option 2
fPush operating lever slightly downwards into
position 4 (a maximum of 10 times).
The speed is reduced by 1 mph (2 km/h), each
time the lever is pushed downwards.
Interrupting cruise control operationThe speed driven before the interruption remains
stored in the memory and can be reactivated by
operating the operating lever. Please see the
chapter “RESUMING THE STORED SPEED” on
Page 168.
fPush the operating lever forward to position 2
(it doesn’t engage) or
fOperate brake or clutch pedal or, on vehicles
with Tiptronic S, select position N.
fPlease see the chapter “TIPTRONIC S” on
Page 170.
Cruise control operation is interrupted
automatically:
– If the set vehicle speed is exceeded by more
than approx. 16 mph (25 km/h) for longer than
20 seconds.
– If the actual vehicle speed falls by approx.
6 mph (10 km/h) below the set vehicle speed
for longer than 5 seconds (e.g. upward
slopes).
– If Porsche Stability Management (PSM)
intervenes for longer than 0.2 seconds.
– If Low Range is switched on.
Resuming the stored speedfPull back the operating lever to position 1.
Note on operation
The stored speed should only be recalled when
traffic conditions and the road surface so permit.Switching cruise control readiness offfPush forward the operating lever to position 2
until it clicks audibly into place.
The memory is cleared and the green
readiness light goes out.
When the vehicle is parked and the ignition
switched off, the memory is cleared.
Tip on driving
On upward or downward slopes, the set speed
cannot always be maintained by cruise control.
fTo obtain sufficient engine braking or a better
engine-speed range, therefore, you have to
change down to a lower gear.
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Driving and Driving Safety
169
Manual transmission, clutch
Warning!
Risk of accident, resulting in serious perso-
nal injury or death.
fDo not obstruct the pedal travel with floor mats
or other objects.To avoid damage to the clutch and transmis-
sion:
fAlways depress the clutch pedal fully when
changing gears. Make sure that the gearshift
lever is completely engaged.
fOnly shift into reverse when the car has come
to a complete stop
Floor mats of the correct size and with the
appropriate fasteners are available from your
authorized Porsche dealer.
The positions of the gears are shown on the shift
diagram on the gearshift lever.
fWhen shifting gears, always ensure that the
clutch pedal is fully depressed and the gear
has fully engaged.
fSelect reverse only when vehicle is stationary.
fSelect an appropriately low gear on upward
and downward slopes.
This will ensure optimum use of engine power
and engine braking.
When reverse gear is selected and the ignition is
on, the reversing lights are lit.
Permitted engine speedfYou should change into a higher gear before
the needle reaches the red mark on the tacho-
meter, or ease off the accelerator.
If the red zone is reached during acceleration, fuel
feed is interrupted.
Caution!
Risk of engine damage (overrevving) when
shifting down to a lower gear.
fTake care not to exceed the maximum permit-ted engine speed when down-shifting.
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170
Driving and Driving Safety
Tiptronic SThe Porsche Tiptronic is a six-speed transmission
and features an “automatic” and a “manual” gear-
shift mode.
In automatic selection mode (selector lever po-
sition D), gear changing is automatic.
Depending on the driving program, you can
change temporarily from automatic to manual
mode using the rocker switches on the steering
wheel.
In manual selection mode (selector lever
position M), you change gear using the rocker
switches on the steering wheel or by pushing the
selector lever forward or back.
The functions of selector lever positions D and M
differ in the on-road program, High Range, and in
the off-road program, Low Range.
You can change between selector lever positions
D and M as you wish while driving.
The currently selected gear is retained if you
change from D to M.
If you change from M to D, the gear-changing map
suitable for your current driving style is selected
and the appropriate gear is selected.
Note on operation
Take care not to operate the rocker switches on
the steering wheel inadvertently, thereby trigger-
ing undesired gear changes.
Changing the selector lever positionThe selector lever is locked with the ignition key
withdrawn.
The selector lever can be moved from position P
or N only with:
– The ignition switched on
– The brake pedal pressed and
– The release button pressed (arrow).Release button
The release button (arrow) on the front side of the
selector lever prevents unintentional gear chan-
ges.
The release button must be pressed when shifting
to position R or P.
The selector lever cannot be operated in the event
of an electrical fault.
fPlease see the chapter “SELECTOR LEVER
EMERGENCY RELEASE” on Page 175.
StartingThe engine can be started only in selector lever
position P or N with the brake pedal pressed.Moving offfSelect the desired position for moving off
(D, M or R) only when the engine is idling and
when depressing the brake pedal.
fSince the car creeps when in gear, do not re-
lease the brake until you want to move off.
fAfter selecting a gear, do not accelerate until
you can feel that the gear is engaged.
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Driving and Driving Safety
171
Selector lever positionIndicator for selector lever position and
engaged gearWhen the engine is running, the selector lever
position and engaged gear are indicated.
Selector Lever PositionsP – Parking lockIn selector lever position P, the driven wheels are
mechanically locked.
fEngage parking lock only when vehicle is
stationary.
fEngage parking lock after applying the
parking brake and release it before releasing
the parking brake.
fAlways apply the parking brake before leaving
the vehicle.
The ignition key can be withdrawn only in selector
lever position P.R – ReversefSelect reverse only if car is stationary and the
brake is applied.N – NeutralSelector lever position N must be selected for
towing or in car washes, for example.
fSelect the desired position for moving off
(D, M or R) only when the engine is idling and
when depressing the brake pedal.
D - Automatic selection mode (in the road
driving program)fUse selector lever position D for “normal”
driving.
The gears are shifted automatically according
to the accelerator position and speed.
Depending on the way the vehicle is driven and on
the resistance (e.g. uphill), the gear-changing
points are shifted towards higher or lower engine-
speed ranges. Movement of the accelerator,
driving speed, longitudinal and lateral acceleration
and the road profile all have an influence on the
gear-changing characteristic.
When PSM is switched off, transmission gear
changes are done at higher engine speeds.
Unwanted upward shifts, e.g. before corners, are
prevented by swiftly releasing the accelerator
pedal.
Depending on lateral acceleration, upward
changes on corners are not made until the engine-
speed limit is reached.
During braking, and depending on the amount of
deceleration, the Tiptronic changes down earlier.
For subsequent cornering, the right gear is
engaged when pressure is applied to the brakes
before the corner.
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172
Driving and Driving Safety The corner is taken in the right gear, and when you
accelerate out of the corner you do not have to
change down.
Shifting gear on the steering wheel
By shifting gear with the rocker switches on the
steering wheel, you can temporarily change from
automatic selection mode D to manual selection
mode M.
Advantages:
– Shifting down before corners and on entering
congested areas, on downward slopes (engine
braking) or for brief spurts of acceleration.
– Selecting 1st or 2nd gear for moving off.
The manual selection mode remains engaged:
– For cornering (depending on the lateral
acceleration) and passing,
– When the vehicle is stationary (e.g. at a
junction).
The system leaves manual selection mode:
– automatically after around 8 seconds
(unless car is cornering, passing or
stationary),
– if you depress the accelerator to kickdown.Temporary change-down
Precondition:
– Speed is higher than approx. 33 mph
(54 km/h).
fDepress accelerator quickly.
The Tiptronic changes temporarily to the
sportiest gear-changing map, i.e. to the
highest possible gear-changing points.
Correspondingly, the transmission shifts down
immediately by one, two or three gears.
Ending the function
fRelease the accelerator markedly (by approx.
25%).
Kickdown
The kickdown function is active in selector lever
position D.
fFor optimum acceleration, e.g. when over-
taking, depress the accelerator pedal beyond
the full-throttle point (kickdown).
The transmission shifts down depending on the
speed of travel and engine speed.
Upward shifts occur at the highest possible engine
speeds.
These gear-changing speeds remain active until
the accelerator is released to approx. 80% of the
full-throttle position.
D - Automatic selection mode (in the off-
road driving program)fUse selector lever position D for “normal”
driving.
The gears are shifted automatically according
to the accelerator position and speed.
The gear-changing points have been adjusted to
achieve the best possible vehicle control on diffi-
cult terrain.
Depending on the route profile, the gear-changing
points are shifted towards higher or lower engine-
speed ranges. On steep downhill stretches,
upward shifts are prevented until medium engine
speeds are reached (at least 2,500 rpm).
When the car is passing, an automatic upshift
does not occur when the engine speed limit is
reached.
Shifting gear on the steering wheel
By shifting gear with the rocker switches on the
steering wheel, you can temporarily change from
automatic selection mode D to manual selection
mode M.
Advantages:
– Shifting down on downward slopes (engine
braking) or for brief spurts of acceleration.
– Selecting 1st/2nd or 3rd gear for moving off.
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Driving and Driving Safety
173
The manual selection mode remains engaged:
– For passing
– Depending on lateral acceleration
– When the vehicle is stationary (e.g. at a
junction).
The system leaves manual selection mode:
– Automatically after around 8 seconds
(unless car is subject to high lateral accelera-
tion, is passing or stationary),
– if you depress the accelerator to kickdown.
Kickdown
The kickdown function is active in selector lever
position D.
fFor optimum acceleration, e.g. when overta-
king, depress the accelerator pedal beyond
the full-throttle point (kickdown).
The transmission shifts down depending on the
speed of travel and engine speed.
Upward shifts occur at the highest possible engine
speeds.
These gear-changing speeds remain active until
the accelerator is released to approx. 80% of the
full-throttle position.
Tip on driving
Unlike in the on-road driving program, an automa-
tic upshift is not performed in manual selection
mode M when the engine-speed limit is reached.
M - Manual selection mode (in the on-
road driving program)
Warning!
The kickdown function is not active in manual
selection mode “M”.
The kickdown function cannot be used to
downshift in manual selection mode “M”.
fTherefore shift down manually when accelera-ting (e.g. to overtake).Shifting up
fPress upper part (+) of a rocker switch A or
fPush selector lever B forward in the M gate.
Shifting down
fPress lower part (–) of a rocker switch A or
fPush selector lever B back in the M gate.
Depending on driving speed and engine speed,
you can shift up or down at any time. Gear
changes which would exceed the upper or lower
engine-speed limit are not executed by the control
unit.
You can change down two gears by quickly pres-
sing rocker switches A or selector lever B twice.
If PSM is active and the engine-speed limit is
reached, an automatic upward shift is performed
or, just before idling speed is reached, a down-
ward shift is performed.
fSelect an appropriately low gear on upward
and downward slopes.
This will ensure optimum use of engine power
and engine braking.
If manual mode fails, the control electronics
switch to automatic mode.
In this event, the instrument panel will display
selector lever position D.
fTo remedy the fault, please consult an
authorized Porsche dealer.
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174
Driving and Driving Safety
M - Manual selection mode (in the off-
road driving program)
Warning!
The kickdown function is not active in manual
selection mode “M”.
The kickdown function cannot be used to
downshift in manual selection mode “M”.
fTherefore shift down manually when accelera-ting (e.g. to overtake).
Tip on driving
The kickdown function is not active in selector
lever position M.
Unlike in the road driving program, an automatic
upshift is not performed when the engine-speed
limit is reached.Shifting up
fPress upper part (+) of a rocker switch A or
fPush selector lever B forward in the M gate.
Shifting down
fPress lower part (–) of a rocker switch A or
fPush selector lever B back in the M gate.
Depending on driving speed and engine speed,
you can shift up or down at any time. Gear
changes which would exceed the upper or lower
engine-speed limit are not executed by the control
unit.
You can change down two gears by quickly pres-
sing rocker switches A or selector lever B twice.
The gear is changed down automatically just
before idle speed is reached.
fSelect an appropriately low gear on upward
and downward slopes.
This will ensure optimum use of engine power
and engine braking.
If manual mode fails, the control electronics
switch to automatic mode. In this event, the instru-
ment panel will display selector lever position D.
fTo remedy the fault, please consult an
authorized Porsche dealer.
StoppingfFor a brief stop (e.g. at a traffic light), leave the
selector lever in drive position and hold the
vehicle with the brake pedal.
fDo not hold the car on a slope using the acce-
lerator. Use the brake pedal or the parking
brake instead.
fBefore leaving the vehicle, always apply the
handbrake and move the selector lever to
position P.
Tip on driving
In selector lever positions D and M, the hillholder
function makes it easier to move off from a stand-
still on an upward slope when the engine is run-
ning. The driver does not have to apply the brake.
fPlease see the chapter “HILLHOLDER -
MOVING-OFF ASSISTANT ON VEHICLES WITH
TIPTRONIC S” on Page 187.
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Driving and Driving Safety
177
Driving Programs for On-Road and
Off-Road DrivingTwo different driving programs with special power-
transmission and running-gear control systems
(such as ABS, off-road ABS and PSM, etc.) are pro-
vided in your Porsche for realising the best possib-
le driving dynamics combined with maximum safe-
ty.
– Low Range off-road driving program
(with reduction)
– High Range on-road driving program
(without reduction)When the driving program is active, the power
transmission and running-gear control systems
are automatically adapted to the requirements for
off-road or on-road driving.
Selecting driving programThe particular driving program can be selected
using the rocker switch A.
The rocker switch A is located in the center con-
sole of the vehicle. It features a multi-step function
and can be operated in both directions.
Note on operation
The number of differential locks that can be enga-
ged in Low Range depends on the equipment of
your vehicle.
Prerequisites for manual settings
Vehicles with manual transmission
fStop the vehicle.
fApply the brake.
fPut the gearshift lever in neutral.
Caution!
Risk of engine damage (overrevving). In the
Low Range program, the gear-shifting points
are shifted towards lower engine-speed ran-
ges.
fShift early to prevent overrevving the engine.
Vehicles with Tiptronic S
fWhen selecting the off-road driving program:
Reduce speed to below 9.3 mph (15 km / h) or
stop vehicle.
fWhen selecting the on-road driving program:
Reduce speed to below 19 mph (30 km / h) or
stop vehicle.
fMove Tiptronic selector lever to position N.
Danger!
Risk of accident, resulting in serious perso-
nal injury or death due to uncontrolled vehic-
le movement. The Tiptronic selector lever is
blocked during the shifting procedure. Shif-
ting when driving uphill can cause the vehicle
to stand still or even roll backwards, if the
shifting procedure has not yet been comple-
ted. When driving downhill, the vehicle can
accelerate unintentionally while shifting.
fIncreased brake readiness is required.
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