2008 PORSCHE CAYENNE wheel

Off road
Applying power with sensitivity, protecting with strength.
Off-road Technology package.
The rear differential enables
optimum distribution of engine
torque in difficult off-road terrain.
A fully automated part of the
all-wheel system, its primary
function is to optimise traction.
If one of the rear wheels begins
to lose grip, the differential varies
the torque transmitted through
each drive shaft, thereby restoring
traction. Available as a factory-fitted
option on all Cayenne models, the
Off-road Technology package*
incorporates an electronically
variable and lockable rear
differential as part of the standard
all-wheel drive system. Other
features include high-strength
rock-rails with integrated skid
plates, a reinforced engine-bay
guard, enhanced protection for
the fuel tank and rear axle, and
a second towing lug.In low-range mode, the rear
differential can be manually
locked using the main off-road
control on the centre console.
In this state, both rear wheels
receive the same amount of
torque.
For additional off-road protection,
optional wheel-arch extensions
(black finish) and running boards*
with integrated skid plates are
available.
* Not available for the Cayenne GTS.
· 89 · · 88 ·

The Cayenne Turbo comes with
Bi-Xenon headlights featuring
dynamic range control and
integrated cleaning, as well as
static and dynamic cornering
lights.
The dynamic cornering light
function uses the road speed,
yaw velocity (speed of rotation
around the vertical axis) and
steering angle to calculate the
course of each corner. The system
Lighting the way in active safety.
Headlight system.
Safety
The static cornering lights are
extremely useful when turning at
a junction, even at lower speeds.
Depending on the amount of
steering lock applied, they can
illuminate an unlit side street.
The new daytime running lights
(dipped-beam headlights and side-
lights) can be set to automatically
activate when the car is started.
Headlight (Cayenne, Cayenne S and
Cayenne GTS)
All Cayenne models have round
H11 foglights on the front apron.
Other exterior lights.
The rear lights are designed as
one-piece modules. The reversing
lights, brake lights and high-level
third brake light feature high-speed
LEDs.The doors and tailgate are fitted
with red safety lights. An additional
pair of indicators are located in the
front wheel arches, where they are
visible from the front, side and rear
of the car.
Cornering light function on Bi-Xenon headlights
then calculates the optimum
angle of illumination for the swivel-
mounted Bi-Xenon lights up to a
maximum of 15°. Visibility is much
improved in every corner and
potential obstacles are easier to
identify. The system is also available
as an option on the Cayenne,
Cayenne S and Cayenne GTS.
Headlight (Cayenne Turbo)
It’s always a pleasure taking
corners in a Porsche. Especially
now they’re so visible at night.
The Cayenne, Cayenne S and
Cayenne GTS are all equipped
as standard with an H7 projector-
beam headlight system featuring
manual range control and
reflection high-beam lights.
Sidelights and indicators are
neatly combined as rectangular
units in the outer air intakes.
· 93 · · 92 ·

by a tandem booster and large
brake master cylinder. The foot-
operated parking brake uses a
duo-servo system mounted on
each of the rear discs.
Porsche Stability Management
(PSM) features two additional
brake functions: electronic brake
Porsche braking systems are
renowned worldwide as the
benchmark in performance and
stability. The Cayenne models
continue this tradition, offering
excellent deceleration – even
when fully laden with five adult
Porsche has always been synonymous with acceleration.
That’s only half the story.
Braking system.
All Cayenne models have internally
vented discs all round. This simple
yet highly effective design ensures
consistent brake performance.
The front disc dimensions
(diameter/thickness) are 330 mm /
32 mm on the Cayenne, 350 mm /
34 mm on the Cayenne S and
Cayenne GTS, and 380 mm /
38 mm on the Cayenne Turbo.
All models have six-piston monobloc
aluminium brake calipers at the
front and four-piston equivalents
at the rear. The Cayenne Turbo
has a new and more powerful
braking system to offset its higher
performance. The fixed calipers on
the Cayenne Turbo are noticeably
larger and have a striking red
paint finish. The calipers on the
Cayenne GTS are also red, while
the Cayenne S has silver and the
Cayenne black. Braking is assisted
Safety
occupants, a full complement of
luggage and a braked trailer load
of up to 3,500 kg (Cayenne GTS
with steel-sprung suspension:
3,080 kg).
prefill prior to an emergency stop
and all-wheel brake assist. See
page 98 for more information
on PSM.
All brake pads are fitted with
individual wear sensors. When new
pads are required, a warning light
is illuminated in the instrumentcluster. The brake lines serving
each of the rear calipers feature
special off-road protection
against rocks and other debris.
· 95 · · 94 · Cayenne: standard front brake
with 330-mm discCayenne S: standard front brake
with 350-mm disc
Cayenne GTS: standard front brake
with 350-mm discCayenne Turbo: new standard front brake
with 380-mm disc

piston units at the rear. The
resulting brake forces are not
only high, they are also extremely
Porsche Ceramic Composite Brake (PCCB).
Porsche Ceramic Composite Brake (PCCB),
front disc diameter: 410 mm
The pads are mounted in six-
piston monobloc aluminium fixed
calipers at the front, with four-
Safety
As an optional alternative, the
Cayenne S, Cayenne GTS and
Cayenne Turbo can all be
equipped with the race-proven
Porsche Ceramic Composite
Brake (PCCB)*.
The large disc diameter (410 mm
front and 370 mm rear) adds
significantly to brake performance.
The discs are made from a
specially treated carbon-fibre
compound that is silicated in a
high-vacuum process at 1,700 ºC.
The resulting material is not only
much harder than cast iron, it
is also more resistant to heat.
Even at high temperatures, the
thermal resistance of the PCCB
disc ensures excellent dimensional
stability. The ceramic material is
totally resistant to corrosion and
offers excellent acoustic damping
properties.consistent. The pedal response
is fast and precise with only
moderate input required.
PCCB enables shorter braking
distances in even the toughest
road and race conditions.
Excellent fade resistance ensures
greater balance when slowing
from high speed.
· 97 · · 96 ·
The Porsche Ceramic Composite
Brake (PCCB) is a visible
acknowledgement of Porsche race
engineering. The key advantage
is a total weight saving of
approximately 50 % compared
with equivalent cast-iron discs.
As well as enhancing performance,
the unsprung and rotating masses
are lightened. The results: greater
comfort and road-holding
on uneven road surfaces plus
better handling and agility.
* Compatible with 20-inch wheel diameter or greater as well as 19-inch collapsible spare wheel.

Oversteer with PSM
Understeer without PSM
Car steers
off line Car steers
off line PSM corrects
line and
stabilises car
PSM corrects
line and
stabilises car
Understeer with PSM Oversteer without PSM
All Cayenne models are
equipped with Porsche Stability
Management (PSM) as standard.
This electronic control system
uses a range of functions –
including anti-lock braking (ABS) –
to help stabilise the vehicle
(and trailer, if fitted) in hazardous
road scenarios. Throughout each
journey, PSM uses a range of
sensors to monitor the direction,
speed, yaw velocity (speed of
rotation around the vertical axis)
and lateral acceleration of the
car. The system then calculates
the actual direction of travel. If
the car begins to oversteer or
understeer, PSM applies selective
braking on individual wheels to
restore stability. If necessary,
PSM can also intervene in the
engine management system to
temporarily modify the amount
of drive to the wheels.PSM has two additional functions
that help reduce braking distances.
If the throttle pedal is released
suddenly, PSM automatically
readies the braking system. The
pressure in the brake lines is
marginally increased, bringing
each of the pads into light contact
with the corresponding disc. If the
driver goes on to apply the brakes,
the calipers respond more quickly.
In an emergency stop – i.e., when
the pressure on the brake pedal
exceeds a certain threshold –
the brake assist function uses
the PSM hydraulics to apply
maximum braking force at all
four wheels.
PSM makes a significant contribu-
tion to car and trailer safety –
within the laws of physics. It
compensates for load transfer
caused by throttle and brake
inputs up to the maximum degree
of lateral acceleration. It also
enhances the car’s driving dynam-
ics and directional stability when
accelerating on variable road
surfaces. PSM can also intervene
through the locking centre and
axle differentials as part of
Porsche Traction Management
(PTM).
Other features include a
special control strategy in
the PSM-integrated ABS for braking on loose surfaces such
as gravel or snow. By briefly
locking the wheels, a wedge is
formed ahead of each tyre which
provides additional purchase
to help slow the car.
For a more active driving experi-
ence, PSM can also be disabled.
For safety reasons, it remains
active in the background, ready
to intervene in critical scenarios.
Expecting the best means preparing for the worst.
Porsche Stability Management (PSM).
Safety
· 99 · · 98 ·

performance in mind. Directly
before you is the familiar cluster
of five round instruments and a
three-spoke steering wheel with
height/reach adjustment and
leather rim. In the Cayenne GTS
and Cayenne Turbo, the standard
wheel is electrically adjustable.
All four models come with leather
upholstery on the seat centres,
inner side bolsters and head
restraints as well as the gear
lever/selector, door handles,
centre console grab handles and
door panel armrests.
On the Cayenne GTS and
Cayenne Turbo, the leather
extends to parts of the
dashboard, centre console,
door panels and steering wheel
airbag module. As on every Porsche, the interior
of the car is designed around
the driver. The instruments and
controls are logically arranged for
intuitive operation.
Every interior feature is elegantly
crafted with quality, comfort and
Ergonomics and design.
Inseparable in a Porsche.
Interior.
Comfort
Natural leather interior in Black/Chestnut Brown (Cayenne Turbo)
The sporty interior in the
Cayenne GTS includes Alcantara
on the seat centres, rooflining and
parts of the door trim panels. The
centre console has an Aluminium
Look finish, perfectly complemented
by the ‘Sport’ aluminium package.
· 115 · · 114 ·
Options available on all Cayenne
models include a three-spoke
multifunction steering wheel with
leather rim and a padded steering
wheel for added sporting style
(standard on Cayenne GTS).

Natural leather interior in Black/Chestnut Brown (Cayenne Turbo)
Comfort
Long-distance comfort on the road.
Lateral support on the racetrack.
The Cayenne and Cayenne S have
comfort seats as standard with
the option of a comfort memory
package. The Cayenne GTS comes
with sports seats and a comfort
memory package as standard
(both optional on all other models).
The standard comfort seats in
the Cayenne and Cayenne S offer
electric fore/aft, height, backrest,
squab angle and lumbar support
adjustment for the driver and front
passenger.Front seats.
Ergonomically crafted, the standard
front seats in the Cayenne models
offer high lateral support, extensive
variability and excellent long-
distance comfort.The Cayenne Turbo has comfort
seats with comfort memory
package as standard.
Special features include electric
adjustment on the front seats
(12-way), steering column and
driver’s seat-belt height. The
comfort memory package stores
seat, mirror, steering wheel and
seat-belt height settings for up
to three different drivers. The
passenger-side memory also stores
up to three sets of preferences. The
comfort seats are also available
as an option on the Cayenne and
Cayenne S.
The Cayenne GTS comes with
sports seats as standard. These
are also equipped with the same
comfort memory package included
with the comfort seats. Special
seat features include higher side
bolsters offering greater lateral
support. The sports seats are
available as an extra-cost option
on the Cayenne and Cayenne S
and no-cost option on the
Cayenne Turbo.
The seat belt buckle is mounted
on the seat, which means the
belt is comfortable and secure
however the seat is positioned.
Other important passive safety
features include seat-belt pre-
tensioners and force limiters.
All front seats are available with
embossed Porsche Crest on the
head restraints as an option.
Porsche Crest embossed on head restraint Sports seat in natural leather with comfort memory package
(optional for Cayenne, Cayenne S and Cayenne Turbo)
· 117 · · 116 ·

The Cayenne, Cayenne S and the
Cayenne GTS are equipped with
the CDR-30 CD radio as standard.
The Cayenne Turbo has Porsche
Communication Management
(PCM – see page 132) and the
BOSE
® Surround Sound System
(see page 136).
The new CDR-30 CD radio.
Standard equipment in the Cayenne,
Cayenne S and Cayenne GTS,
the new 2-DIN CDR-30 CD radio
combines excellent sound with
exceptional ease of use. The
package includes an MP3-compatible
CD drive, 12 loudspeakers and
4 x 25-Watt internal amplifiers. The
5-inch monochrome display offers
excellent visibility and a clear layout –
especially when operating a con-
nected Bluetooth
®mobile phone
(telephone preparation available
as option). Other options available
in conjunction with the CDR-30
include an integrated six-disc
CD autochanger (easily accessible
from either front seat) and an
Aux-In port in the lower storage
compartment in the centre console
for connecting an external audio
source. The CDR-30 can also be
combined with the BOSE®
Surround Sound System for the
ultimate in sound performance.
Mobile phone preparation.
With this optional preparation,
you can connect a Bluetooth
®
Hands-Free Profile (HFP)-compatible
mobile phone* and use PCM
or the CDR-30 CD radio as a
hands-free system. As a Bluetooth®-
based solution, you can connect
your handset without even taking
it from your pocket. The basic
phone functions are accessible via
the PCM/CDR-30 head unit, multi-
function steering
wheel or voice
control. Connection to the mobile
phone network is via
the handset
antenna.**
Only one thing compares to the sound of your Porsche.
The sound of your Porsche.
Porsche audio systems.
The new CDR-30 CD radio
Comfort
At Porsche, we appreciate the
importance of sound as an integral
part of the driving experience.
Which is why the interior acoustics
of each Cayenne model were
a key consideration during the
development process.
· 131 · · 130 ·
CD/DVD autochanger.
This optional integrated CD/DVD
autochanger replaces the standard
single-disc drive in the CDR-30
CD radio or PCM (DVDs playable
only in PCM). The front-loading
device holds up to six CDs/DVDs
and is easily accessible from
either front seat. Operated using
the standard head unit controls.
** For information on compatible phones, please consult your Porsche Centre or visit www.porsche.com.
** Mobile phone preparation: using a mobile phone inside the vehicle may expose occupants to heightened levels of electromagnetic radiation.
Vehicles with the mobile phone preparation can also be equipped with a cradle upgrade kit (handset-specific). When the handset is in the cradle,
all calls are connected via an external antenna, thereby reducing interior radiation. For information on upgrade kits for your mobile phone, please
consult your mobile phone accessory retailer. Using the telephone module for PCM avoids exposure to radiation as it also connects to the mobile
phone network via an external antenna.