2009 PORSCHE PANAMERA engine

Driving and Driving Safety
167
Starting and Stopping the EngineThe immobilizer can be deactivated and the
engine started only using an authorised
ignition key.
fPlease see the chapter “IMMOBILIZER” on
page 250.
Warning!
Risk of poisoning. Exhaust gas contains
colorless and odorless carbon monoxide
(CO), which is toxic even in low
concentrations. Carbon monoxide can cause
unconsciousness and even death if inhaled.
f Never start or let the engine run in an
enclosed, unventilated area. It is not
recommended to sit in your car for prolonged
periods with the engine on and the car not
moving.
An unattended vehicle with a running engine
is potentially hazardous. If warning lights
should come on to indicate improper
operation, they would go unnoticed.
f Never leave the engine idling unattended.
Danger of fire close to the hot exhaust
system.
f Do not park or drive your vehicle where
combustible materials, such as dry grass or
leaves, can come into contact with the hot
exhaust system. For information on the emission control system:
f
Please see the chapter “EMISSION CONTROL
SYSTEM” on page 262.
f If your car catches on fire for any reason, call
the fire department. Do not endanger your life
by attempting to put out the fire.
Starting the vehicle f Operate the footbrake.
f Move PDK selector lever to position P or N.
f Do not press the accelerator pedal.
The engine control unit will provide the correct
starting mixture.
f Turn the ignition key or control unit (Porsche
Entry & Drive) to ignition lock position 2.
The starting process is carried out and
completed automatically as soon as ignition
lock position 2 (start engine) is reached.
The ignition key or control unit is reset
automatically to ignition lock position 1
(ignition on).
f Do not operate the starter for more than
approx. 10 seconds. If necessary, repeat the
starting procedure after a pause of approx.
10 seconds. Turn the ignition key back to
ignition lock position 0 (initial position) first.
The first operation of the starter is ended
automatically when the engine starts.
If the engine does not start, subsequent
starter operations will not be ended
automatically.

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Driving and Driving Safety
f
Do not warm up the engine when stationary.
Drive off immediately. Avoid high revs and full
throttle until the engine has reached operating
temperature.
f If the vehicle battery power is too weak, the
engine can be started with jump leads.
For information on jump-lead starting:
f Please see the chapter “EXTERNAL POWER
SUPPLY, JUMP-LEAD STARTING” on
page 306.
Note on operation
To ensure a good battery charge condition,
thereby ensuring that the battery will start the
engine, all electrical loads that are not required
should be switched off when the ignition is
switched on and when engine revs are low
(in traffic jams, in city traffic or in queues).
Stoppingf Only remove the ignition key when the vehicle
is stationary.
f Only switch the ignition off when the vehicle is
stationary, as there is no power steering and
brake booster assistance when the engine is
switched off.
f When leaving the vehicle, always remove the
ignition key, apply the electric parking brake
and engage selector-lever position P .
The control unit always remains in the ignition
lock on vehicles with Porsche Entry & Drive .
Warning!
Danger of injury. Hot engine compartment
components can burn skin on contact.
f Before working on any part in the engine
compartment, turn the engine off and let it cool
down sufficiently.
Risk of burn injury when standing near or
coming into contact with the exhaust pipe.
The exhaust pipe is hot wh en the vehicle is running
and remains hot for some time after the vehicle is
turned off. f
To prevent injury, make a point of noting where
your vehicle’s exhaust pipe is, avoid placing
your legs near the exhaust pipe when loading
and unloading cargo in the rear, and closely
supervise children around the vehicle during
time when the exhaust pipe could be hot.
A hot exhaust pipe can cause painful skin
burns.
Radiator fanFor information on radiator fans:
f Please see the chapter “RADIATOR FANS” on
page 258.
Warning!
Danger of injury. After the ignition is
switched off, the engine compartment and
coolant temperatures are monitored for
approx. 30 minutes. During this period, and
depending on temperature, the radiator fan
may continue to run or start to run.
f Carry out work in these areas only with the
engine off and exercise extreme caution,
always anticipating that the fan blade could suddenly start to run.

Driving and Driving Safety
169
Auto Start Stop FunctionThe engine stops automatically when the vehicle is
stopped, e.g. at traffic lights or in a traffic jam.
The Auto Start Stop function thus helps to
save fuel.
The ignition stays on even when the engine
switches off automatically. All safety functions
are still available.Stopping the engineThe Auto Start Stop function stops the engine
as soon as the vehicle stops moving.
1. Use the footbrake to hold the vehicle in place.
2. Keep the footbrake pressed.or
Move PDK selector lever to position P.
Preconditions for stopping the engine
– Engine compartment lid closed.
– Driver detected: driver’s seat belt fastened and driver’s door closed.
– PDK selector lever in position D, N or P or
transmission range 1 or 2 selected manually.
– Engine, transmission and battery are at operating temperature.
– Vehicle was driven at a speed of more than approx. 1 mph (2 km/h) for at least
1.5 seconds since the engine last stopped
automatically.
Starting the engineThe Auto Start Stop func tion starts the engine:
f In PDK selector-lever position D, N or manually
selected transmission range 1 or 2:
Release the footbrake.
or
Press the accelerator.
or
f Move PDK selector lever to position R.
You can drive off normally.
Note
The engine will start automatically in certain
situations, e.g. if the vehicle starts rolling, if air
conditioning causes reduced comfort, or if the
brake booster vacuum is reduced.
Starting the engine manually after leaving
the vehicle
If the driver’s seat belt is unbuckled or the driver’s
door is opened after the engine was stopped
automatically, the engine will not start
automatically.
Furthermore, if the brake is released, the engine
has to be started manually.
The message “Please start engine manually”
will appear on the multi-function display in the
instrument panel.
f Please see the chapter “OVERVIEW OF
WARNING MESSAGES” on page 152.
Exceptions for the Auto Start Stop
functionThe Auto Start Stop function is not available in the
following situations, for example:
– When Sport mode is activated.
– When PSM is off.
– In Maneuvering mode.
– When AC MAX mode is activated.
– When the “Windshield defrost” function is active.
– While adjusting the chassis level.
– When the rear fog light is on.
The Auto Start Stop fu nction is available with
limited functionality in the following situations,
for example:
– If the air conditioning or passenger compartment heating is operated at a high
setting or if the defrost function is run for long
time periods.
– If the battery charging condition is low.
– On upward or downward slopes.
– During internal vehicle test procedures, e.g. automatic engine checks.
Note
If one of these situations arises after the engine
has stopped automatically, the engine can be
restarted automatically.

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Driving and Driving Safety
Switching Auto Start Stop function off
f
Press button .
The indicator light on the button lights up.
The engine’s Auto Stop function is disabled.
Switching Auto Start Stop function on
f Press button .
The indicator light on the button goes out.
The engine stops automatically when the
vehicle stops.
Auto Start Stop function displayIf the engine was stoppe d automatically by the
Auto Start Stop function and if the driver is
detected in the vehicle (driver’s seat belt fastened
and driver’s door closed), the indicator light on the
multi-function display in the instrument panel will
light up green.
If the Auto Stop function is not available or if no
driver is detected in the vehicle after the engine
has stopped automatically (driver’s seat belt open
or driver’s door open), the indicator light on the
multi-function display in the instrument panel will
light up yellow when the vehicle is stationary.
The Auto Start Stop system has detected that:
– At least one precondition for stopping the engine automatically is not met.
or
– There is at least one exception for the Auto Start Stop function.
For information on preconditions for stopping the
engine automatically:
f Please see the chapter “PRECONDITIONS FOR
STOPPING THE ENGINE” on page 169. For information on exceptions for the Auto Start
Stop function:
f
Please see the chapter “EXCEPTIONS FOR
THE AUTO START STOP FUNCTION” on
page 169.
Note
If the indicator light in the multi-function display
continuously lights up yellow when the vehicle is
stopped and if the engine does not stop regularly
when the vehicle is stoppe d despite the fact that
the preconditions for stopping the engine
automatically are met, this may be an indication
that the battery is weak.
f Have the Auto Start Stop system checked the
next time you visit an authorized Porsche
dealer.
Fault reporting
If there is a fault, the warning message “Start/
Stop mode deactivated” will appear on the
multi-function display in the instrument panel.
f Have the fault corrected at an authorized
Porsche dealer.
Switching Auto Start Stop function on
and off
Stopping the engine automatically
and restart readiness
Engine does not stop or is not ready
to restart

Driving and Driving Safety
171
Electric Parking BrakeThe electric parking brake acts on the rear wheels
and serves to secure the vehicle while parked.Applying the parking brakefPress switch .
The brake warning light on the instrument
panel lights up.
For information on indi cator lights and warning
lights on the instrument panel:
f Please see the chapter “INSTRUMENT PANEL
USA MODELS” on page 107.
Releasing the parking brakeThe electric parking brake can only be released
when the ignition is switched on.
1. Press the brake pedal.
2. Pull switch .
The brake warning light on the instrument
panel goes out.Automatic electric parking brake release
when driver’s intention to drive off is
detectedIf the engine is running, the driver’s door is closed
and the driver’s seat belt is fastened, it is still
possible to drive off even though the parking
brake is on. The electric parking brake detects
the driver’s intention to drive off and releases
automatically. The warning light on the instrument
panel goes out.
If the driver’s door is not closed or the driver’s
seat belt is not fastened, the electric parking
brake will not be released automatically when the
driver attempts to drive off.
The message “Release electric parking brake”
appears on the multi-function display in the
instrument panel. The brake warning light on the
instrument panel and the indicator light on the
switch start to flash.
For information on warning messages on the
multi-function display:
fPlease see the chapter “OVERVIEW OF
WARNING MESSAGES” on page 152.
Emergency braking functionIf the conventional brak e system has failed, the
vehicle can be decelerated quickly and braked to
a stop using the electric parking brake.
f Press switch and keep it pressed.
The brake warning light on the instrument
panel and the indicator light on the switch
start to flash. The messa ge “Emergency brake
function” appears on the multi-function display.
The emergency braking function is deactivated
when you release the switch.
Safety instruction!
Severe braking. Emergency braking takes
place with very high braking power.
f Only use the emergency braking function in an
emergency situation.
f Do not use the emergency braking function to stop the vehicle when driving normally.

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Driving and Driving Safety
Brake boosterThe brake booster assists braking only when
the engine is running.
When the car is moving while the engine is not
running, or if the brake booster is defective, more
pressure on the brake pedal is required to bring
the car to a stop.
Moisture, road salt or grit on brakes affects
braking.
Brakes will dry after a few cautious brake
applications.
Warning!
Risk of an accident, resulting in serious
personal injury or death.
Driving through water may reduce the
traction. Moisture on brakes from road
water, car wash, or a coating of road salt or
grit may affect braking efficiency.
f Cautiously apply brakes to test brakes after exposure to road water, etc.
Brake wearYour car has excellent brakes, but they are still
subject to wear. The rate at which they wear
depends on how the brakes are used.
f Have the brake system inspected at the
intervals recommended in your Maintenance
Booklet.
Brake system warning light
You can check the functionality of the brake
system warning light by switching the ignition to
the “On” position (position 1) and verifying that the
warning light illuminates.
A warning message will be displayed on the multi-
function display of the instrument panel if the
brake pads are worn, excessively.
f Do not continue to operate the vehicle.
Have your authorized Porsche dealer inspect
or replace the brake pads.
For information on warning messages on the
multi-function display:
f Please see the chapter “OVERVIEW OF
WARNING MESSAGES” on page 152.
Brake pads and brake discsWear on the brake pads and brake discs depends
to a great extent on the driving style and the
conditions of use and therefore cannot be
expressed in actual miles on the road.
The high-performance brake system is designed
for optimal braking effect at all speeds and
temperatures.
Certain speeds, braking forces and ambient
conditions (e.g. temperature and humidity) can
therefore cause the brakes to “squeal”.
New brake pads or linings
New brake pads have to be “broken in”, and
therefore only attain optimal friction when the car
has covered several hundred miles or km.
The slightly reduced braking ability must be
compensated for by pressing the brake pedal
harder. This applies whenever the brake pads
and/or brake discs are replaced.
Brake wear warning message

Driving and Driving Safety
175
Warning!
f Do not obstruct the pedal travel with floor mats
or other objects.
The brake booster is ready for operation only
while the engine is running.
If the engine is switched off or there is a defect in
the brake booster, much greater force has to be
applied to the pedal when braking.
f Vehicles with defective brakes must not
be towed and must be transported on a flat
bed.
For information on towing and tow-starting:
f Please see the chapter “TOWING” on
page 316.
In heavy rain, while driving through water or after
leaving a car wash, the braking action may be
delayed and increased pressure may be required.
f For this reason, keep further back from the
vehicle in front and “dry” the brakes by
applying them at interval s. Make sure that the
traffic behind you is not affected. After a long drive over salted or gritted roads,
a coating may form on the brake discs and pads
that significantly reduces
friction and therefore
also braking effect.
f Even though the brake discs consist of alloyed
grey cast iron, they will unavoidably start to
corrode if your vehicle is parked for an
extended period. The brakes will tend to “rub”
as a result.
The nature, extent and effects of corrosion
depend on the amount of time the vehicle was
parked, whether road salt or grit was spread
and whether grease-dissolving agents were
used in car washes (not on vehicles with
Porsche Ceramic Composite Brake).
To prevent corrosion of the brake discs,
“brake them dry” before parking the vehicle
(not on vehicles with Porsche Ceramic
Composite Brake).
If braking comfort is no ticeably impaired, we
recommend that you have the brake system
checked by an authorized Porsche dealer. f
To relieve the brake system on downhill
stretches, change down to a lower gear in
good time (engine braking).
If engine braking is insufficient on steep
stretches, operate the footbrake at intervals.
Avoid continuous braking as it overheats the
brakes and reduces the braking effect.
For information on brake fluid and checking the
brake fluid level:
f Please see the chapter “BRAKE FLUID” on
page 258.

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Driving and Driving Safety
Resuming the stored speed – RESUMEfPress the control stalk up (position 4).
Cruise control accelerates/decelerates the
vehicle to the stored speed.
Note on operation
The stored speed should on ly be recalled if traffic
and road conditions are conducive to driving at
that speed.Switching cruise control readiness offf Press button A on the control stalk.
The memory is cleared and the readiness
symbol disappears.
The stored desired speed is cleared when the
ignition is switched off when the vehicle is parked.
Tip on driving
On upward or downward slopes, the set speed
cannot always be maintained by cruise control.
f To obtain sufficient engine braking or a better
rev range, you therefore have to change down
to a lower gear.
Adaptive Cruise ControlAdaptive 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 travelling 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 fr om 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.
Warning!
Risk of accidents in heavy traffic, in city
traffic, on twisting roads or in unfavorable
road conditions (e.g. wintry or wet conditions
or varying road surfaces, etc.).
f Do not use adaptive cruise control under these
conditions.
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 sensorAdaptive cruise control uses a radar sensor
located in the middle of the front apron.
Maintenance note
fAlways keep the radar sensor clean and free of
ice and snow to ensure tha t it is fully functional.
For car care instructions:
f Please see the chapter “CAR CARE
INSTRUCTIONS” on page 269.