2010 PORSCHE PANAMERA Owners Manual

Driving and Driving Safety
199
StoppingfFor a brief stop, e.g. at traffic lights, leave the
selector lever in drive position and hold the
vehicle with the brake pedal.
f Do not hold the vehicle on a slope using the
accelerator. Use the brake pedal or the
electric parking brake instead.
f Before leaving the vehicle, always apply the
electric parking brake and move the selector
lever to position P.Parkingf Go easy on the accelerator!
f When parking or maneuvering in a small
space, control the speed by careful use of
the footbrake.Driving in winterIn wintry road conditions, it is advisable to take
steep inclines in manual mode. This prevents gear
changes occurring that could cause wheel spin.Tow-starting, towingfPlease see the chapter “TOWING” on
page 316.
Reduced driving programIf there is a fault in the transmission
– Depending on priority, either the “Gearbox
emergency operation” warning in yellow or red
or the warning “Gearbox temperature too high”
will appear on the multi-function display.
“Gearbox emergency operation” warning in
yellow
Effects:
– Restricted gearshift comfort, reverse gear may not function.
Action required:
f Have the fault corrected immediately.
Please contact a qualified specialist workshop.
We recommend that you have an authorized
Porsche dealer to do this work as they have
trained workshop personnel and the necessary
parts and tools. “Gearbox emergency operation” warning in red
Effect:
– Vehicle can be driven
only until it comes to
astop.
Action required:
f It is not possible to continue driving. Stop the
vehicle immediately in a suitable place. Have
the vehicle towed to a qualified specialist
workshop.
f Please see the chapter “TOWING” on
page 316.
Warning “Gearbox temperature too high”
–Effects: “Warning jerks” can be fe lt when driving off and
the engine power may be restricted.
Action required:
Do not hold the vehicle with the accelerator on
a hill, for example. Hold the vehicle with the
brake. Reduce engine load. Stop the vehicle in
a suitable place if possib le. Allow the engine to
run in selector-lever position P or N until the
warning disappears.

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Driving and Driving Safety
PDK selector lever emergency releaseIn the event of an electronics failure, the PDK
selector lever can only be moved from selector-
lever position P if an emergency release operation
has already been performed.
Note
If a selector lever emergency release was
performed, the vehicle must not be towed.
f Please see the chapter “TOWING” on
page 316.
f Secure the vehicle to prevent it from
rolling away.
1. Open the ashtray.
2. Remove the ashtray insert.
fSwivel the spring for locking the ashtray
approx. 20° to the left. 3. Close the ashtray lid a
pprox. 45° and hold it
at that position.
4. Insert a screwdriver, for example, in through the opening, which is now visible at the right
next to the spring, and press the release
button for the selector support down.
5. Press the selector lever release button and move the selector lever out of position P.
The vehicle can now be moved.
6. To secure the vehicle, move the selector lever
to position P.

Driving and Driving Safety
201
Transmission and Chassis Control SystemsYour Porsche features a complex integrated system made up of all control systems acting in power transmission and in the chassis.
All control systems are networked with the aim of combining the best possible driving performance with maximum safety.
The following systems are invo lved, depending on equipment:
System/designation Scope
PTM
Porsche Traction Management – Active all-wheel drive with electronically
regulated map-controlled multiple-disc clutch
PSM
Porsche Stability Management – Driving stability control
– Anti-lock brake system (ABS)
– Brake system prefilling
– Brake booster (Hydraulic Brake Assist)
– Automatic brake differential (ABD)
– Anti-slip control (ASR)
– Engine drag torque control (MSR)
– HOLD function: standstill management
Air suspension
with level control and height adjustment – Full load-bearing air-spring stru
ts with integrated shock absorbers
– Height adjustment with Low Level setting in “S port Plus” mode and High Level setting for
maneuvering
PAS M
Porsche Active Suspension Management – Shock absorber system with adaptive, continuous shock absorber control
PDCC
Porsche Dynamic Chassis Control – Active chassis control system to stabilise
roll tendency of vehicle body when driving
– Controlled rear differential lock

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Driving and Driving Safety
Porsche Traction Management
(PTM)Porsche Traction Management is an active all-
wheel control system designed to influence
longitudinal and lateral dynamics. It is closely
linked with the Porsche Stability Management
(PSM) system.
The permanently driven rear axle enhances the
vehicle’s sporty features. Drive power is
distributed fully variably to the front axle,
depending on the driving situation.
In conjunction with PSM, the PTM system ensures
perfect distribution of power among all four
wheels in every driving situation. This improves
traction and driving stabil ity and ensures the same
high level of agility and dynamic response.
Warning!
In spite of the advantages of PTM and four-wheel
drive, it is still the driver’s responsibility to adapt
his driving style and maneuvers in line with road
and weather conditions, as well as the traffic
situation.
The increased safety that is provided should not
induce you to take greate r risks with your safety.
The limits set by the physics of driving cannot be
overcome, even with PTM or four-wheel drive.
Risk of accidents due to inappropriate speed
cannot be reduced by PTM or four-wheel drive. Advantages of PTM
– Clearly perceptible improvement in traction,
driving stability and steering ability of the
vehicle.
– Vehicle is more manageable when driven at its performance limits.
– Improved straight-ahead tracking and greater stability.
– More sporty vehicle setup while making full use of all the advantages of four-wheel drive.
– ASR and ABD further enhance traction for all wheels.
For information on ASR and ABD:
f Please see the chapter “PORSCHE STABILITY
MANAGEMENT (PSM)” on page 202.
Porsche Stability Management
(PSM)PSM is an active control system for stabilisation of
the vehicle during extreme driving maneuvers.
It operates together with the Porsche Traction
Management (PTM) system provided the vehicle is
fitted with the relevant equipment.
PSM makes use of both the ABD and ASR
systems, as well as the known functions of the
anti-lock brake system (ABS) and engine drag
torque control system (MSR).
Warning!
In spite of the advantages of PSM, it is still the
driver’s responsibility to adapt his driving style and
maneuvers in line with road and weather
conditions, as well as the traffic situation.
The increased safety that is provided should not
induce you to take greater risks with your safety.
The limits set by the physics of driving cannot be
overcome, even with PSM.
Risk of accidents due to inappropriate speed
cannot be reduced by PSM.

Driving and Driving Safety
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Advantages of PSM
– Best possible traction and lane-holding ability
in all driving situations – even on road surfaces
with varying friction.
– The system compensates for undesired vehicle reactions (Ferraria effect) when the
driver releases the accelerator pedal or brakes
on bends. This compensation functions up to
the maximum lateral acceleration.
– PSM actively stabilises the vehicle if necessary during dynamic driving maneuvers (e.g. rapid
steering movements, during lane changes, or
on alternating bends).
– Improved braking stability on bends and on different or varying road surfaces.
– Improved brake function and shorter stopping distance in the event of emergency braking. Readiness for operation
PSM is switched on automatically every time you
start the engine.
Function
Sensors at the wheels, brakes, steering system
and engine continuously measure:
–Speed
– Direction of travel (steering angle)
– Lateral acceleration
– Axial acceleration
– Rate of turn about the vertical axis
PSM uses these values to determine the direction
of travel desired by the driver.
PSM intervenes and corrects the course if the
actual direction of motion deviates from the
desired course (steering-wheel position):
It brakes individual wheels as required.
If necessary, PSM also influences the engine
power or the gear-changing characteristic of
Porsche Doppelkupplung (PDK) in order to
stabilise the vehicle. The events below inform the driver of PSM control
operations and warn him to adapt his driving style
to the road conditions:
– PSM warning light on the instrument panel
flashes.
– Hydraulic noises can be heard.
– The vehicle decelerates and steering-wheel forces are altered as PSM controls the brakes.
– Reduced engine power.
– The brake pedal pulsates and its position is changed during braking.
In order to achieve full vehicle deceleration,
foot pressure must be increased after the
brake pedal has begun vibrating.
Examples of PSM control operations
– If the “front wheels of the vehicle drift” on
a bend, the engine power is reduced and the
rear wheel on the inside of the bend is braked
if necessary.
– If the rear of the vehicle swings out on a bend, the front wheel on the outside of the bend is
braked.

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Driving and Driving Safety
– Brake system prefilling:
The brake system is prepared for possible
subsequent emergency braking if the
accelerator pedal is released suddenly and
quickly. The brake system is prefilled and the
brake pads are already applied gently to the
brake discs.
– Brake booster (Hydraulic Brake Assist): In the event of an emergency braking operation
where the pedal force is insufficient, a brake
booster provides the braking pressure
necessary for maximum deceleration at all
4wheels.
Combined operation of PSM and PTM
In order to ensure optimum stabilisation of the
vehicle, torque distribution between the front and
rear wheels is adapted and the rear differential
lock is controlled on vehicles with PDCC.
In the event of a PTM fault, PSM cannot be
switched off.
If PSM is switched off, it is switched on again
automatically. Automatic brake differential (ABD)
The ABD system controls the front and rear axles
separately. If one wheel of an axle starts to spin,
it is braked so that the other wheel on the same
axle can be driven.
ABD recognizes different driving states, and it
features control strategies adapted to these
states. In situations in which little propulsive power
is required, such as when the vehicle moves off on
a level gravel surface, traction control already
becomes active at low engine speeds. If a large
amount of propulsive power is required, e.g. when
driving off on an uph
ill slope or for rapid
acceleration, the ABD system is adapted
accordingly.
Anti-slip control (ASR)
The anti-slip control system prevents the wheels
from spinning by adjusting the engine power,
thereby ensuring good lane-holding ability and
stable handling.
Engine drag torque control (MSR)
In conditions of excessive slip, the engine
drag torque control system prevents all driven
wheels from locking up when the vehicle is
overrunning. This is also the case for downshifts
on a slippery road.
Switching off PSMf Press button for at least 1 second.
PSM is switched off after a short delay.
The indicator light on the button and the
PSM OFF warning light on the instrument
panel light up.
The warning “PSM off” appears on the
multi-function display in the instrument panel.

Driving and Driving Safety
205
When you brake in the ABS control range,
the vehicle is stabilised even when PSM is
switched off.
One-sided spinning of the wheels is prevented,
even with PSM switched off.
PSM should always be switched on during
“normal” driving.
H o w e v e r, i t m a y b e a g o o d i d e a to s w it c h o f f P S M
temporarily in exceptional situations:
– On a loose surface and in deep snow.
– When “rocking the vehicle free”.
– When using snow chains.
Tip on driving
The vehicle retains its enhanced braking readiness
through prefilling of the br ake system even when
PSM is switched off.
When PSM is switched off, wheel-specific brake
interventions and the anti-slip control system (ASR)
are also switched off.
The automatic brake differential (ABD) remains on.
Adaptive cruise control is deactivated when PSM
is switched off.
When PSM is switched off, the slip monitoring
function of Porsche Doppelkupplung (PDK) is also
deactivated.
Switching PSM back onf Press button .
PSM is active immediately.
The indicator light on the button and the
PSM OFF warning light on the instrument
panel go out.
The message “PSM switched on” appears on
the multi-function disp lay in the instrument
panel.“Sport Plus” modeA sportier setup is obtained when “Sport Plus”
mode is switched on.
PSM interventions occur later than in Normal
mode. The vehicle can be maneuvered with
greater agility at its pe rformance limits, without
having to dispense with th e assistance of PSM in
emergency situations. This helps to achieve
optimal lap times, particular ly on race circuits and
on a dry road surface. – The PSM warning light on the instrument panel
lights up for a lamp check when the ignition is
switched on.
– The light indicates a control operation, even when PSM is switched off, e.g. brake control in
the event of one-sided wheel spin.
– The light - in conjunction with the multi-function display - indicates a fault.
The warning message “PSM failure” appears
on the multi-function display in the instrument
panel.
For information on warning messages on the multi-
function display:
f Please see the chapter “OVERVIEW OF
WARNING MESSAGES” on page 152.
f Adapt your driving style according to the
changed conditions.
f Contact a qualified spec ialist workshop in
order to correct the fault. We recommend that
you have an authorized Porsche dealer to do
this work, as they have the trained workshop
personnel and the necessary parts and tools
for this type of work.
To w i n g
For information on towing:
f Please see the chapter “TOWING” on
page 316.
PSM warning light

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Driving and Driving Safety
HOLD function: Drive-Off Assistant and
standstill management The HOLD function assists the driver when
stopping and driving off on upward slopes.
The vehicle is automatically prevented from rolling
back away from the desired direction of travel.
When the HOLD function is active, the function
light on the instrument panel lights up.
When adaptive cruise control is operating
normally, the HOLD function holds the vehicle
following automatic braking until the vehicle is
actively held in a stationary position.
Notes on operation
The HOLD function is no t available if the PDK
selector lever is in position N.
If the PDK selector lever is moved while the
HOLD function is active, the HOLD function is
deactivated.
If the driver’s seat be lt is unbuckled and the
driver’s door is opened wh ile the HOLD function is
active, the electric park ing brake is activated
automatically.
For information on the electric parking brake:
f Please see the chapter “ELECTRIC PARKING
BRAKE” on page 171.
Warning!
In spite of the advantages of the HOLD function, it
is still the driver’s responsibility to adapt his
driving style and maneuvers in line with road and
weather conditions, as well as the traffic situation.
The increased safety that is provided should not
induce you to take greate r risks with your safety.
Caution!
If the vehicle comes to a stop on a steep
uphill gradient without operation of the
footbrake by the driver, this may result in a
certain roll-back before the vehicle is held by
the HOLD function. In this situation, the roll-
back can be reduced by operating the
footbrake.
f Assist holding of the vehi cle by increasing the
brake force with the footbrake.
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.
Danger!
Risk of accidents. The limits set by physics of
driving cannot be overcome, even with HOLD
function. The responsibi lity for stopping and
driving off on uphill gradients is still the
driver’s, despite the HOLD function.
Assistance by the HOLD function is not
always guaranteed when stopping and
driving off on a slippery surface (e.g. on icy
or loose surfaces). In this case, the vehicle
can slip.
f Always adjust your driving style to the driving
conditions and vehicle load. Use the footbrake
if necessary.
If the Drive-Off Assistant is not functioning,
the driver cannot be assisted when driving
off on hills.
f Hold the vehicle with the footbrake.