2009 PORSCHE PANAMERA brake

Driving and Driving Safety
177
Accelerating (e.g. to overtake)Variant 1
fIncrease the speed as usual with the
accelerator pedal.
When you ease off the accelerator, the
previously stored value is set again.
Variant 2
f Push the control stalk on the steering wheel
forward (position 1).
The desired speed is increased in steps of
1mph (1km/h).
or
Press the control stalk on the steering wheel
forward and keep it pressed (position 1).
The desired speed is increased in steps of
5 mph (10 km/h).
The new desired speed is displayed on the
multi-function display in the instrument panel.
Deceleratingf Briefly pull the control stalk on the steering
wheel towards the steering wheel (position 2).
The desired speed is decreased in steps of
1 mph (1 km/h).
or
Pull the control stalk on the steering wheel
towards the steering whee l and keep it pulled
(position 2).
The desired speed is decreased in steps of
5 mph (10 km/h).
The new desired speed is displayed on the
multi-function display in the instrument panel.
Vehicles with PDK
Downshifts are carried out to help maintain the
pre-selected speed (especially when driving
downhill).
Interrupting cruise control
operation–OFFThe speed driven before the interruption remains
stored in the memory and can be reactivated by
pressing the control stalk.
f Please see the chapter “RESUMING THE
STORED SPEED – RESUME” on page 178.
f Press the control stalk down (position 3).
or
Press the brake or clutch pedal or move
the PDK selector lever to position N.
For more information on driving with Porsche
Doppelkupplung:
f Please see the chapter “PORSCHE
DOPPELKUPPLUNG (PDK)” on page 193.
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 below the set vehicle speed by approx. 37 mph (60 km/h)
for longer than 60 seconds (e.g. gradients).
– If Porsche Stability Management (PSM) intervenes for longer than 0.5 seconds.

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Driving and Driving Safety
Override
The speed of the vehicle can be increased at any
time by pressing the accelerator.
If the set ACC speed is exceeded, the ACC is
deactivated.
The message “ACC passive” will appear on the
multi-function display in the instrument panel.
The desired speed that was stored is retained.
After releasing the accelerator pedal, the ACC
accelerates to the desired speed if there is no
vehicle in front and controls the distance if a
vehicle in front is present.
For information on the “ACC passive” status:
f
Please see the chapter “OPERATING STATES
WHEN ADAPTIVE CRUISE CONTROL IS
SWITCHED ON” on page 182.
R- Switch adaptive cruise control on/off
1 - Set/increase desired speed
2 - Reduce desired speed
3 - Interrupt (OFF)
4 - Operational readiness on/return to set speed
(RESUME)Using adaptive cruise controlAdaptive cruise control is operated using the
control stalk at the bottom left of the steering
wheel.
Note on operation
You can intervene manually at any time by
pressing the brake or accelerator.
A - Status display and desired speed
B - Current speed
C - Progress bar showing speed control range
(0–100 mph, 0–160 km/h)
D - Vehicle detected in front
E - Desired distance from vehicle in front
F - Current distance from vehicle in front
G - Current speed of vehicle travelling
in front

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Driving and Driving Safety
Switching adaptive cruise control on
and offSwitching adaptive cruise control on
fPress button R on the control stalk.
The grey status display appears on the
multi-function display.
Adaptive cruise control is ready.
Switching adaptive cruise control off
f Press button R on the control stalk.
“ACC off” appears on the multi-function
display.
The desired speed that was stored is deleted.
The desired distance is set to the default value.Operating states when adaptive cruise
control is switched onThere are three possible operating states when
adaptive cruise control is switched on.
Adaptive cruise control active
Adaptive cruise control automatically regulates
the speed and distance fr om the vehicle in front.
The status display A turns orange. Adaptive cruise control is ready
Cruise control and distance control is inactive
after pressing the brakes or interrupting by
pressing the control stalk down (position
3, OFF ).
The desired speed that was stored and the
desired distance that was set are retained.
The status display A turns grey.
Adaptive cruise control is active again after
you release the accelerator.
For information on resuming cruise control and
distance control:
f Please see the chapter “RESUMING CRUISE
CONTROL AND DISTANCE CONTROL –
RESUME” on page 185.
Adaptive cruise control passive
Cruise control and distance control is inactive
after pressing the accelerator.
“ACC passive” appears on the multi-function
display.
The desired speed that was stored and the
desired distance that was set are retained.
The status display A turns grey.
Adaptive cruise control is active again after
you release the accelerator.
Setting and changing the desired speedPreconditions
– ACC is switched on.
– Vehicle is moving.
– No stationary objects are detected in front.
Setting the desired speed
1. Press the control stalk on the steering wheel forward (position 1).
The current driving speed is stored as the
desired speed, which will be maintained
automatically (within the control range from 20
to 100 mph, 30 to 210 km/h), and appears
orange in the status display A.
The red triangle B under the progress bar for
the speed control range shows the speed of
your vehicle.
2. Release the accelerator pedal. The desired speed is maintained automatically
unless a vehicle travelling in front is detected
as driving slower than the desired speed.
Note
If your vehicle is stopped, the message
“Impossible when parked” appears on the multi-
function display when you press the control stalk
forward (position 1).
If a stationary object wa s detected in front, the
message “Stationary ob ject” appears on the
multi-function display.

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Driving and Driving Safety
Possible distance settings
Automatic braking to a stopIf the vehicle in front stops, adaptive cruise control
will slow your vehicle down
to a stop provided this
is possible within the control limits of the system.
The display lights up on the instrument panel.
The vehicle is actively held at a stop.
For information on the HOLD function:
f Please see the chapter “HOLD FUNCTION:
DRIVE-OFF ASSISTANT AND STANDSTILL
MANAGEMENT” on page 206.
Note
Depending on the traffic flow, e.g. slow moving
traffic, stopping is initiated by a slow crawling
phase which ends in vehicle standstill.
Caution!
Brake pedal feels different. When adaptive
cruise control is operating normally or when
the HOLD function is active, the brake pedal
may feel different and you may hear
hydraulic noises.
This behavior is no rmal for the system.
It is not a fault.
Driving off againThe vehicle can be driven off again after being
stopped and speed and distance control will be
resumed, depending on the operating state of the
adaptive cruise control system.
For information on the operating states of the
adaptive cruise control system:
fPlease see the chapter “OPERATING STATES
WHEN ADAPTIVE CRUISE CONTROL IS
SWITCHED ON” on page 182.
Adaptive cruise control active
1. Press the control stalk on the steering wheel up (position 4, RESUME ).
2. Briefly press the accelerator pedal. Your vehicle drives on automatically.
Note
Your vehicle will not drive off if the vehicle
detected in front is stationary.
Adaptive cruise control is ready
Automatic speed and distance control can only
be resumed when your vehicle is moving.
1. Drive off normally.
2. Press the control stalk on the steering wheel up (position 4, RESUME ).
or
Set or change the desired speed.
Suitable for speedy driving in lines of
traffic. The time headway is 1 second.
This corresponds to 36 yd. (33 meters)
at a speed of 75 mph (120 km/h).
Suitable for driving comfortably in lines
of traffic. The time headway is
1.3 seconds. This corresponds to
47 yd. (43 meters) at a speed of
75 mph (120 km/h).
Preset distance
Corresponds to the general
recommendation of the road traffic
safety regulation (“two seconds time
headway”). The time headway is
1.8 seconds. This corresponds to
66 yd. (60 meters) at a speed of
75 mph (120 km/h).
Suitable for driving on country roads.
The time headway is 2.3 seconds.
This corresponds to 63 yd. (58 meters)
at a speed of 56 mph (90 km/h).

Driving and Driving Safety
185
Interrupting and resuming cruise control
and distance controlInterrupting cruise control and distance
control – OFF
fPress the brake pedal.
or
Press the control stalk on the steering wheel
down (position 3, OFF ).
Adaptive cruise control is inactive.
The desired speed that was stored and the
desired distance are retained.
Resuming cruise control and distance
control – RESUME
f Push the control stalk on the steering wheel up
(position 4, RESUME).
The vehicle accelerates to the desired speed
that was stored unless a vehicle travelling in
front is detected as driving slower than the
desired speed and the distance from this
vehicle is less than the desired distance that
was set.
The status display A changes from grey to
orange.
or
Press the control stalk on the steering wheel
up and keep it pressed (position 4, RESUME).
The vehicle accelerates in a more sporty
driving style to the desired speed that was
stored. Note on operation
If speed and distance control was interrupted
using the control stalk
3 (OFF ), it can only be
resumed again when the vehicle is moving and no
stationary objects are detected in front.
Warning messagesIf adaptive cruise control is not active, the control
system still monitors the distance from the vehicle
in front.
If the distance from the ve hicle in front is less than
the desired distance that was set last, a yellow
warning triangle appears on the multi-function
display.
Warning!
Risk of accidents. Danger of collision with the
vehicle in front.
f Drive with extreme care.
fSlow down if necessary. Overtake request when adaptive cruise
control is active (ACC active)
If adaptive cruise control detects that braking
assistance is required on the part of the driver,
a warning signal sounds and the warning message
“Distance! Please brake!” appears on the multi-
function display.
Warning!
Risk of accidents. Danger of collision with the
vehicle in front.
f Brake immediately.
Distance warning when adaptive
cruise control is inactive
(ACC passive)

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Driving and Driving Safety
Exceptions for adaptive cruise control
Adaptive cruise control is
not available in the
following situations:
– If the ignition is switched off.
– When PSM is off.
– If the driver’s door is opened and the driver’s seat belt is not fastened.
– When parking or maneuvering in very tight spaces.
– If the PDK selector lever is at position N, R or
P .
– On upward or downward slopes of more than 20 %.
– When the electric parking brake is activated.
If one of these exception situations occurs when
adaptive cruise control is switched on, adaptive
cruise control will be switched off.
A message to this effect will appear on the
multi-function display. Messages on the multi-function display
If adaptive cruise control was deactivated
automatically or if an action cannot be performed,
a message to this effect in blue appears on the
multi-function display.
–“
ACC not available! ”
Adaptive cruise control is not available,
e.g. when maneuvering.
–“ ABS/PSM intervention!”
Adaptive cruise control was deactivated
because ABS or PSM intervened as a control
mechanism.
–“ Electric parking brake! ”
Adaptive cruise control was deactivated
because the electric parking brake was
activated.
–“ Selector position!”
Adaptive cruise control was deactivated
because the PDK select or lever is not in
position D or manual position M.
–“ Impossible while parked ”
The required action is not possible because
your vehicle is stationary, e.g. when setting
a desired speed.
–“ Speed! ”
Adaptive cruise control was deactivated
because the rpm limit of the engine was
reached in manual position M of the PDK
selector lever. –“
Gradient too steep! ”
The desired distance or the desired speed
cannot be set because the gradient on the
road is too steep.
–“ Stationary object ”
The action is not possi ble because a stationary
object was detected ahead.
–“ PSM off! ”
Adaptive cruise control is not available
because PSM was switched off.
For information on Porsche Stability
Management (PSM):
f Please see the chapter “PORSCHE STABILITY
MANAGEMENT (PSM)” on page 202.
General information“Sport” and “Sport Plus” mode
Adaptive cruise control regulates your driving
more dynamically in “Sport” and “Sport Plus”
mode.

Driving and Driving Safety
187
Traffic situations in which vehicles are
not reliably detectedThe radar sensor for adaptive cruise control
scans a narrow, cone-shaped area in front of
your vehicle.
Detection can be limited or unreliable, depending
on the traffic situation and the size of the vehicle
in front. The system may brake too late or
unexpectedly. Stationary vehicles are not
detected. The system is unable to react to them.
Tip on driving
fDrive with extreme care.
f Slow down if necessary.
A – Vehicles changing lanes/cutting in
If a vehicle is changing la nes or cutting in ahead of
you in the same lane, th e vehicle will only be
detected when it has moved completely into your
lane.
B – Vehicles with a small cross-section/
narrow vehicles
Narrow or small vehicles will not be detected or
will be detected too late.
C – Driving into and out of corners
When driving into and out of corners, vehicles will
not be detected or will be detected too early, or
adaptive cruise control will react to vehicles in
adjacent lanes.

Driving and Driving Safety
193
Porsche Doppelkupplung (PDK)Porsche Doppelkupplung (PDK) is a seven-speed
transmission with an “automatic” and a “manual”
selection mode.
In automatic selection mode (selector-lever
position D), gear changing is automatic.
You can change temporarily from automatic to
manual mode using the shift buttons on the
steering wheel.
In manual selection mode (selector-lever
position M ), you change gear using the shift
buttons on the steering wheel or with the PDK
selector lever.
You can change between selector-lever
positions D and M as you wish while driving.
Note
f Take care not to operate the shift buttons on
the steering wheel in advertently in either
automatic or manual mode, thereby triggering
undesired gear changes.
Changing the selector-lever positionThe selector lever is blocked when the ignition is
switched off.
When the ignition is switch ed on, the selector lever
can be moved from position P and N only when
the release button is pressed, and when the brake
pedal is pressed.
Release button
The release button ( arrow) in the selector lever
prevents the gear from being changed
unintentionally.
The release button must be pressed when shifting
to position R or P.
StartingThe engine can only be started using the car key
if the brake pedal is pressed and the selector lever
is in position P or N.Driving offf Only select the desired position for driving off
(D, M or R) when the engine is idling and the
brake pedal is pressed.
f Since the vehicle crawls when in gear,
do not release the brake until you are ready
to drive off.
Driving off on hills
The Drive-Off Assistant assists the driver when
driving off on hills. The vehicle is held on the slope
when the driver changes from the brake pedal to
the accelerator to facilitate driving off immediately
after the brake is released.
f Please see the chapter “HOLD FUNCTION:
DRIVE-OFF ASSISTANT AND STANDSTILL
MANAGEMENT” on page 206.