2011-2017 Porsche Cayenne SUV Driving and Driving Safety -> Adaptive Cruise Control User Manual
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Driving and Driving Safety -> Adaptive Cruise Control for Your Porsche Cayenne SUV Second Generation (2011-2017)

160 Driving and Driving Safety
Adaptive Cruise Control
Adaptive cruise control maintains any selected
speed between approx. 20–100 mph
(30–160 km/h) when driving on open roads
without you having to use the accelerator.
If a vehicle traveling ahead of you in the same lane
is detected as driving slower than the selected
speed, adaptive cruise control will automatically
maintain a set distance from the vehicle in front.
Adaptive cruise control slows your vehicle down if
the distance to the vehicle ahead becomes too
short and accelerates your vehicle if the distance
increases.
If the current traffic situation does not allow you to
drive safely at a constant speed and with sufficient
distance to the vehicle in front, using the adaptive
cruise control can cause accidents.
f Do not use the adaptive cruise control in heavy
traffic, in city traffic, on twisting roads or under
unfavorable road conditions (e.g. wintry or wet
conditions, varying road surfaces).
f Observe all local and national speed limits.
Adaptive cruise control will not detect stationary
or slowly moving vehicles, pedestrians, objects on
the road, oncoming vehicles in the same lane or
cross traffic.
f You must pay attention to your vehicle’s
position in relation to other objects and
intervene as needed to ensure safe driving.
f Always keep the direction of travel in your field
of view.
Radar sensor
Adaptive cruise control uses a radar sensor
located in the middle of the front apron (arrow).
Information
f Always keep the radar sensor clean and free of
ice and snow to ensure that it is fully functional.
For car care instructions:
f Please see the chapter “CAR CARE
INSTRUCTIONS” on page 255.
This equipment complies with FCC radiation
exposure limits set forth for an uncontrolled
environment. This equipment should be installed
and operated with minimum distance of 8 in.
(20 cm) between the radiator and your body.
This transmitter must not be co-located or
operating in conjunction with any other antenna or
transmitter.
Radar sensor vision can be impaired by rain,
snow, ice or heavy spray. Vehicles in front will not
be detected properly or may not be detected
at all.
f Do not use adaptive cruise control under these
conditions.
Warning message
Adaptive cruise control can be deactivated
automatically if the radar sensor is very dirty or
iced up, obstructed, in unfavorable weather
conditions (heavy rain) or when driving through
tunnels.
The message “ACC/PAS unavailable” will appear
on the multi-purpose display of the instrument
panel.
For information on warning messages on the
multi-purpose display:
f Please see the chapter “OVERVIEW OF
WARNING MESSAGES” on page 139.
Misuse of Adaptive
Cruise Control
Adaptive Cruise Control
Limits
WARNING
h
WARNING
h
Radiofrequency
radiation exposure
Weather Impairment of
Radar Sensor
WARNING
h
WARNING
h
Driving and Driving Safety 161
Information
This device complies with Part 15 of the FCC
Rules and with RSS-210 of Industry Canada.
Operation is subject to the following two
conditions:
1. This device may not cause harmful
interference, and
2. this device must accept any interference
received, including interference that may
cause undesired operation.
Changes or modifications made to this equipment
not expressly approved by Porsche may void the
FCC authorization to operate this equipment.
This equipment has been tested and found to
comply with the limits for a Class A digital device,
pursuant to Part 15 of the FCC Rules. These limits
are designed to provide reasonable protection
against harmful interference when the equipment
is operated in a commercial environment. This
equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in
accordance with the instruction manual, may
cause harmful interference to radio
communications. Operation of this equipment in a
residential area is likely to cause harmful
interference in which case the user will be required
to correct the interference at his own expense.
This Class A digital apparatus complies with
Canadian ICES-003.
Cet appareil numérique de la classe A est
conforme à la norme NMB-003 du Canada.
Operating principle of adaptive cruise
control
No vehicle detected in front – open road
driving
Adaptive cruise control operates like a cruise
control system. The desired speed that was set is
maintained constantly.
Vehicle detected in front – driving in traffic
If a vehicle traveling ahead of you in the same lane
is detected as driving slower than the selected
desired speed, adaptive cruise control will
automatically maintain a set distance from the
vehicle in front.
If 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.
Adaptive cruise control actively keeps your vehicle
at a standstill.
If the vehicle in front drives off, automatic speed
control and distance control can be resumed.
Speed exceeded
The speed of the vehicle can be increased at any
time by pressing the accelerator.
If the vehicle is traveling faster than the speed set
by adaptive cruise control (ACC), adaptive cruise
control is deactivated.
The message “ACC passive” will appear on the
multi-purpose display of the instrument panel.
The desired speed that was stored is retained.
After the accelerator pedal is released, the ACC
adapts the vehicle speed to the desired speed and
adjusts the distance in following mode.
For information on the “ACC passive” status:
f Please see the chapter “OPERATING STATES
WHEN ADAPTIVE CRUISE CONTROL IS
SWITCHED ON” on page 163.
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 control
Adaptive cruise control is operated using the
control stalk at the bottom left of the steering
wheel.
Information
You can intervene manually at any time by
pressing the brake or accelerator.
162 Driving and Driving Safety
A - Desired distance from vehicle in front
B - Status display and desired speed
C - Current speed
D - Vehicle detected in front
E - Current distance from vehicle in front
F - Current speed of vehicle in front
G - Progress bar showing speed control range
(20–100 mph / 30–160 km/h)
Adaptive cruise control display
All important information, messages and warnings
are displayed on the multi-purpose display of the
instrument panel.
“ACC” main menu
The adaptive cruise control display on the multi-
purpose display can be selected permanently
using the buttons on the multifunction steering
wheel or the control stalk at the bottom right of
the steering wheel.
For information on using the multi-purpose
display:
f Please see the chapter “OPERATING THE
MULTI-PURPOSE DISPLAY ON THE
INSTRUMENT PANEL” on page 108.
Status display
When adaptive cruise control is switched on, the
status display B appears at the bottom left of the
multi-purpose display.
The status display B turns orange when adaptive
cruise control is active.
The status display B is gray when adaptive cruise
control is inactive.
Examples:
Switching adaptive cruise control on
and off
Switching adaptive cruise control on
f Press button R on the control stalk.
The gray status display appears on the
multi-purpose 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-purpose
display.
The desired speed that was stored is deleted.
The desired distance is set to the default value.
1. Select “ACC”
in the main menu.
If adaptive cruise control is switched on,
and no desired speed is stored, the
cruise control symbol appears but the
desired speed field remains blank.
If a desired speed is stored and no
vehicle was detected in front, the cruise
control symbol and the desired speed
are displayed.
If a desired speed is stored and a vehicle
was detected in front, a vehicle symbol
and the desired speed are displayed.
Driving and Driving Safety 163
Operating states when adaptive cruise
control is switched on
There 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 from the vehicle in front.
The status display B 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 B turns gray.
For information on resuming cruise control and
distance control:
f Please see the chapter “INTERRUPTING AND
RESUMING CRUISE CONTROL AND DISTANCE
CONTROL” on page 165.
Adaptive cruise control passive
Cruise control and distance control is inactive
after pressing the accelerator.
“ACC passive” appears on the multi-purpose
display.
The desired speed that was stored and the
desired distance that was set are retained.
The status display B turns gray.
Adaptive cruise control is active again after
you release the accelerator.
Setting and changing the desired speed
Preconditions
– Adaptive cruise control 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 of
20 to 100 mph (30 to 160 km/h)), and
appears orange in the status display B.
The red triangle C 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 traveling in front is detected
as driving slower than the desired speed.
Information
If your vehicle is stopped, the message
“Impossible while parked” appears on the multi-
purpose display when you press the control stalk
forward (position 1).
If a stationary object was detected in front, the
message “Stationary object” appears on the
multi-purpose display.
Increasing the desired speed
f Push the control stalk on the steering wheel
forward (position 1).
The desired speed is increased in steps
of 1 mph (1 km/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 status display B shows the new desired
speed.
The red triangle C under the progress bar for
the speed control range shows the speed of
your vehicle.
Reducing the desired speed
f 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 wheel and keep it pulled
(position 2).
The desired speed is decreased in steps
of 5 mph (10 km/h).
The status display B shows the new desired
speed.
The red triangle C under the progress bar for
the speed control range shows the speed of
your vehicle.
164 Driving and Driving Safety
Setting the desired distance
The desired distance from the vehicle in front can
be set in four stages.
Information
When you are setting the desired distance, the
“ACC” main menu for adaptive cruise control is
displayed temporarily on the multi-purpose
display.
When you first actuate the rocker switch Z, the
“ACC” main menu appears without changing the
desired distance.
Information
The distance depends on the driving speed.
The slower the vehicle is traveling, the shorter the
distance and the faster the vehicle is traveling, the
longer the distance.
Increasing the desired distance
f Press the rocker switch Z up.
The desired distance is increased.
There are more orange segments shown in
the desired distance display A.
Reducing the desired distance
f Press the rocker switch Z down.
The desired distance is reduced.
There are fewer orange segments shown in
the desired distance display A.
Display showing distance from vehicle
in front
If a vehicle is detected in front, the vehicle symbol
D appears on the multi-purpose display and in the
status display B.
The gray area E shows the current distance from
the vehicle in front.
Possible distance settings
Suitable for fast driving in lines of
traffic. The time gap 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 gap 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
gap”). The time gap 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 gap is 2.3 seconds.
This corresponds to 63 yd. (58 meters)
at a speed of 56 mph (90 km/h).
Driving and Driving Safety 165
Automatic braking to a stop
If the vehicle in front stops, your vehicle will slow
down and come to a stop within the control limits
of the system if adaptive cruise control is active.
The indicator light 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, STANDSTILL
MANAGEMENT” on page 192.
Information
– Depending on the traffic flow, e.g. slow
moving traffic, stopping is initiated by a slow
crawling phase, which brings the vehicle to
a standstill.
– 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 normal for the system.
It is not a fault.
Driving off again
The 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:
f Please see the chapter “OPERATING STATES
WHEN ADAPTIVE CRUISE CONTROL IS
SWITCHED ON” on page 163.
Adaptive cruise control active
1. Press the control stalk on the steering wheel
up (position 4, RESUME).
2. Press the accelerator pedal briefly.
Your vehicle drives off again automatically.
Information
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.
Interrupting and resuming cruise control
and distance control
Interrupting cruise control and distance
control – OFF
f Press 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 traveling 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 B changes from gray 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.
Information
If cruise control 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.
166 Driving and Driving Safety
Messages on the multi-purpose 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-purpose display.
– “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 Tiptronic selector 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 Tiptronic
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 possible because a stationary
object was detected ahead.
– “PSM off”
Adaptive cruise control is not available
because PSM was switched off.
– “ACC cutoff”
Adaptive cruise control was deactivated.
– “Steering turned too far”
The steering is turned too far.
– “PHC active”
Porsche Hill Control (PHC) is active or on
standby.
For information on Porsche Stability Management
(PSM):
f Please see the chapter “PORSCHE STABILITY
MANAGEMENT (PSM)” on page 189.
General information
“Sport” mode
Adaptive cruise control regulates your driving
more dynamically in “Sport” mode.
Towing a trailer
Adaptive cruise control is also available when you
are towing a trailer, but is less dynamic.
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
safety belt is not fastened.
– When parking or maneuvering in very tight
spaces.
– When the electric parking brake is activated.
– When the Tiptronic selector lever is in position
N, R or P.
– On upward or downward gradients of more
than 20 %.
– When Porsche Hill Control (PHC) is active
(or on standby).
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-purpose display.
Driving and Driving Safety 167
Warning messages
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-
purpose display.
Traffic situations in which vehicles
cannot be reliably detected
The 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 cannot respond to
stationary vehicles.
f Drive with extreme care.
f Slow down if necessary.
A – Vehicles changing lanes/cutting in
If a vehicle is changing lanes or cutting in ahead
of you in the same lane, the 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.
168 Driving and Driving Safety
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.
D – Stationary vehicles
A stationary vehicle that appears suddenly in the
detection field of the radar sensor, e.g. after
a vehicle in front changes lanes, will not be
detected by adaptive cruise control.
Active Safety – Porsche “Active Safe”
The adaptive cruise control sensor is used for
the Porsche “Active Safe” functions.
These include:
– Brake system prefilling
Prefilling of the brake system if the radar
sensor detects that the vehicle is coming
critically close to a moving obstacle in order
to bridge the air gaps and improve braking
response.
– Brake Assist Plus
Reduction of the activation threshold of the
Brake Assist function if the sensor detects that
the vehicle is coming critically close to
a moving obstacle.
The activation threshold of the Brake Assist
function is reduced in three stages, depending
on how critical the danger situation is.
Information
– All Porsche “Active Safe” functions are active
for speeds of more than 20 mph (30 km/h).
Latent warning (visual)
If the vehicle is driving too close to the vehicle in
front for a long time, to avoid a collision if the
vehicle in front brakes, a latent warning appears
on the multi-purpose display to warn the driver.
f Stay further back from the vehicle in front if
necessary.
Driving and Driving Safety 169
Prewarning (acoustic and visual)
If the radar sensor detects that the vehicle is
coming critically close to and is very likely to
collide with an obstacle moving in front, an
acoustic and visual prewarning is issued.
This warns the driver and still allows a collision to
be prevented if the driver reacts accordingly.
Acute warning (acoustic, visual and tangible)
If the driver does not react to the prewarning by
braking, this is quickly followed by an acute
warning, which involves a braking jolt as well as
the acoustic and visual warning.
A braking jolt is felt in the vehicle as a result
of a very quick build-up of brake pressure.
This alerts the driver to the traffic situation.
The driver can still prevent a collision by reacting
accordingly in this dangerous situation.
Information
The situations described below lead to the
assumption that the driver is driving carefully and
the prewarning and acute warning functions are
disabled:
– The driver drives around tight corners.
– The driver is braking.
– If the driver accelerates sharply, this action
is interpreted as an active driving request
(e.g. indicating the driver’s intention to
overtake).
– When adaptive cruise control is on, the
Porsche “Active Safe” warnings are inactive.
There is no need for these warnings because
adaptive cruise control decelerates in good
time and the visual and acoustic overtake
request “Distance! Please brake!” is issued
early as required.
Switching Porsche “Active Safe”
warnings on/off
The latent warning and prewarning functions are
switched off by default. The acute warning
function is active.
Latent warnings and prewarnings can be activated
under “Prewarning on” on the multi-purpose
display.
The settings remain stored when the ignition is
switched on and off.
f Please see the chapter “ACTIVE SAFE (PAS)”
on page 131.

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