2009 PORSCHE BOXSTER brake

Operation, Safety
33
Standard seat/sports seatA Seat height
fUse lever A in a pumping movement:
Upwards – seat moves upwards
Downwards – seat moves downwards
B Fore and aft
f Raise locking lever B.
Move seat to desired position and release
lever.
Ensure that the seat engages correctly.
CBackrest angle
f Operate switch C until the desired backrest
angle is reached.
Comfort seat with driver seat memory/
Adaptive sports seat with driver seat
memoryf Press the switch in the direction indicated by
the arrow until the desired setting is reached.
A Seat height adjustment
B Fore-and-aft position adjustment
C Seat angle adjustment
D Backrest angle adjustment E Lumbar support
(pelvis and spinal column support)
To permit a relaxed sitting posture, the backrest
curvature is continuously adjustable in vertical and
horizontal directions for individual pelvis and
spinal column support.
f Press the switch in the direction indicated by
the arrow until the desired backrest curvature
is reached.
F Adjusting the backrest side bolsters (adaptive sports seat only)
f Push forward or pull backward switch F until
the side bolsters are adjusted to the shape of
the body.
G Adjusting the seat cushion side bolsters (adaptive sports seat only)
f Push forward or pull backward switch G until
the side bolsters are adjusted to the shape of
the body.
Seat backrestFolding forward
f Pull up lever H in the side part of the backrest
and fold the backrest forward.
Folding back
f Tilt back and engage the backrest so that it
cannot tip forward when the car is braked.

34
Operation, Safety
Sports seat/adaptive sports seat only
The seat belt can be fixed to the seat backrest
with the retaining strap, so
that it can be reached
more easily for buckling up.
f Release button J at the top of the retaining
strap, insert the seat be lt and fasten the strap
once more.
Sports bucket seatf Do not install a child restraint system in
the Sports bucket seat.
The Sports bucket seat cannot be equipped
with the LATCH system.
A Fore and aft adjustment
f Raise locking lever A.
Move seat to desired position and release
lever.
Ensure that the seat engages correctly. BBackrest
Folding forward
f
Pull loop B in the side par t of the backrest and
fold the backrest forward.
Folding back
f Tilt back and engage the backrest so that it
cannot tip forward when the car is braked.

36
Operation, Safety
Operating with the remote control of the
vehicle keyEach remote control (up to six) can be assigned an
individual seat and door mirror position.
The stored seat and door mirror position is set au-
tomatically when the vehicle is unlocked using the
corresponding remote control.
Storing seat position
1. Switch the ignition on with the desired car key.Reverse gear must not be engaged.
2. Set the desired seat and door-mirror positions.
3. Keep memory button M depressed and also
press key button 1 until an audible signal
confirms that the position has been stored.
The individual setting is now assigned to this
remote control and to the key button.
It is necessary to wait for at least 15 seconds
between locking and unlocking the door. Storing individual lowered position of the
passenger’s door mirror as a parking aid
Once the driver's seat setting has been stored, an
individual lowered position of the passenger's
door mirror may be stored for driving in reverse:
1. Apply the handbrake.
2. Switch the ignition on
with the desired car key.
3. Engage reverse gear.
4. Select passenger side with mirror switch. The passenger’s mirror swivels downwards.
5. Set passenger’s door mirror to desired final position.
6. Keep memory button M depressed and also
press key button 1 until an audible signal
confirms that the position has been stored.
The individual setting is now assigned to this
remote control and to the key button. Recalling seat position
f
Unlock the locked vehicle or the luggage
compartment with the remote control.
The stored seat position is automatically set.
The seat position assigned to a remote control
can also be recalled with the key button 1 if the
corresponding key was used to switch on the
ignition.
If no seat position has be en assigned to a remote
control, the key button will not work.
Note on operation
Automatic seat adjustment can be interrupted
immediately:
f by switching on the ignition,
f by pressing the central locking button,
f by pressing any memory or seat adjustment
button.
Clearing the stored seat position
1. Switch the ignition on with the desired car key.
2. Press memory button twice and key button 1
once consecutively.

Operation, Safety
55
Sports Exhaust SystemSwitching on and offThe sports exhaust system can be switched on
and off when the ignition is switched on using
button A .
When the sports exhaust system is switched on,
the light-emitting diode in the button lights up.
Parking Brake Parking brake force is mechanically transferred to
the rear wheels by means of cables.
f Use the parking brake only after the vehicle
has come to a full stop.
Setting the parking brake f Pull the lever all the way up (arrow ).
With the ignition on, the parking brake warning
lights in the instrume nt panel and on-board
computer will come on if the lever is even
slightly raised. A firm pull upward is required to
properly engage the parking brake.
If the brake is not fully set, the vehicle may roll
without control.
f Move the selector lever to “P” (PDK) or move
the gearshift lever to reverse or first gear
(Manual transmission).
f Before exiting the vehicle, make sure that the
parking brake is fully se t and the vehicle is not
moving at all.
Danger!
Risk of serious personal injury or death. A
partially engaged parking brake may allow
the vehicle to roll, ca using serious personal
injury or death to any person in its path.
f Engage the parking brake fully.Releasing the parking brakefPull the lever slightly up as you depress the re-
lease button, and then push the lever all the
way down.

56
Operation, Safety
The warning lights in the
instrument panel and on-
board computer will go out after the parking brake
is fully released.
The warning lights are not an indicator that the
parking brake is fully set; it is only intended to be
a warning to release the parking brake before
driving the car. Caution!
A partially engaged brake will overheat the
rear brakes, reduce their effectiveness and
cause excessive wear.
f Release the parking brake fully.
f When parking your car, always set the parking
brake by pulling all the way up on the lever.
f Move the selector lever to “P” (PDK) or move
the gearshift lever to reverse or first gear
(Manual transmission).
f On hills also turn the front wheels towards the
curb.
Brakes fMake it a habit to chec k the operation of your
brakes before driving.
Keep in mind that the braking distance increases
very rapidly as the speed increases. At 60 mph or
100 km/h, for example, it is not twice but four
times longer than 30 mph or 50 km/h. Tire trac-
tion is also less effective when the roads are wet
or slippery.
f Therefore, always maintain a safe distance
from the car in front of you.
Vehicles without Porsche Ceramic Compos-
ite Brake (PCCB)
Even though the brake discs consist of alloyed
grey cast iron, they will unavoidably start to cor-
rode if your car is parked for an extended period.
The brakes will tend to “rub” as a result.
The nature, extent and effects of corrosion de-
pend on the amount of time the vehicle was
parked, whether granular or liquid road salt was
spread and whether grease-dissolving agents
were used in car washes.
To prevent corrosion of the brake discs, ”brake
them dry“ before parking the car.
If the braking comfort is noticeably impaired, we
recommend having the brake system checked by
experts at an authorized Porsche dealer.
Brake system function Your Porsche is equipped with a power assisted
hydraulic dual circuit brake system with disc
brakes at the front and rear.
Both circuits function independently. One brake
circuit operates the front and the other operates
the rear.
If one brake circuit has failed, the other will still op-
erate. However, you will notice an increased pedal
travel when you apply the brakes.
Failure of one brake circuit will cause the stopping
distance to increase.
Warning!
Risk of an accident, resulting in serious per-
sonal injury or death.
In the unlikely event of hydraulic failure of
one brake circuit:
f Push the brake pedal down firmly and hold it in
that position.
A mechanical linkage activates the second cir-
cuit, and you will be able to bring the vehicle to
a stop.
f After bringing your vehicle to a complete stop,
avoid driving the vehicle and instead have it
towed to the nearest authorized Porsche deal-er for repair.
Parking brake warning light USA
Parking brake warning light
Canada

Operation, Safety
57
Brake system warning light
You can check the functionality of the brake
system warning light by switching the ignition to
the "On" position and verifying that the warning
light illuminates.
If the warning lights in the instrument panel and on-
board computer go on while driving, the brake flu-
id level may be too low, or (if the brake pedal travel
has increased) one of the two brake circuits may
have failed.
A greater braking pressure will be required, stop-
ping distances will be longer and the braking be-
havior will change, particularly in curves.
With correctly adjusted brakes, and a correctly
working brake system, the pedal travel to the
point of brake actuation should be 1-3/16 in. to
1-9/16 in. or 30 to 40 mm.
Whenever the brake pedal travel exceeds this dis-
tance, have the brake system checked.
Brake pedal
Warning!
Risk of an accident, re sulting in serious per-
sonal injury or death.
Any obstruction of the brake pedal could
increase the stopping distance.
f Always check the movement of the brake pedal
before driving and make sure that it is not ob-
structed by a floor ma t or any other object.
f Secure the floor mat to prevent it from sliding
into positions that could interfere with the safe
operation of your vehicle.
Your Porsche dealer will be glad to offer you nonskid floor mats of the correct size.
Note
In case one of the two brake circuits fails, in-
creased pedal travel is required to bring your
vehicle to a full stop.
Warning!
To avoid overheating and premature wear of
the brakes:
f Before descending a steep grade, reduce
speed and shift the tran smission into a lower
gear or driving position to control speed.
f Do not “ride the brakes” by resting your foot on
the pedal when not intending to apply brake
pressure.
f Do not hold the pedal down too long or too
often.
This could cause the brakes to get hot and not function properly.
f Please see the chapter “DRIVE-OFF ASSIS-
TANT” on Page 173.
Brake warning light USA
Brake warning light Canada

58
Operation, Safety
Brake booster The brake booster assists braking only when
the engine is running.
When the car is moving while the engine is not run-
ning, or if the brake boos ter is defective, more
pressure on the brake pedal is required to bring
the car to a stop.
If this happens, ABS and PSM will also not oper-
ate.
Moisture or road salt on brakes affects braking.
Brakes will dry after a fe w cautious brake applica-
tions.
Warning!
Risk of an accident, resulting in serious per-
sonal injury or death.
Driving through water may reduce the trac-
tion.
Moisture on brakes from road water, car
wash, or coating of road salt may affect
braking efficiency.
f Cautiously apply brakes to test brakes after ex-posure to road water, etc.
Brake wear Your car has excellent brakes, but they are still
subject to wear. The rate at which they wear de-
pends 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 and verifying that the warning
light illuminates.
If the warning lights in the instrument panel and on-
board computer stay on when the engine is run-
ning or come on while driv ing, 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.
Brake pads and brake discsWear on the brake pads and brake discs depends
to a great extent on the driving style and the con-
ditions 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 tem-
peratures.
Certain speeds, braking forces and ambient
conditions (such as temperature and humidity)
therefore might cause “brake noises”.
New brake pads or linings
New brake pads and brake discs have to be “bro-
ken in”, and therefore only attain optimal friction
when the car has covered several hundred miles
or km.
The slightly reduced braking ability must be com-
pensated for by pressing the brake pedal harder.
This also applies whenever the brake pads and
brake discs are replaced.
Warning light USA
Warning light Canada

Operation, Safety
59
ABS Brake System
(Antilock Brake System)The ABS system represents a major contribution
to the enhancement of active safety in your vehi-
cle. This system prevents the wheels from locking
in a panic stop on almost all road surfaces.
With the ABS system in your vehicle, the
following areas are enhanced:
Steering, vehicle remains steerable under all
braking forces when ABS is engaged.
Good directional control , no swerving caused
by locking of wheels under braking conditions.
Shorter stopping distance , stopping distances
are usually reduced because controlled braking is
maximized.
Prevention of wheel lock up , no brake- induced
sliding and thus no localized tire wear from emer-
gency braking.
The crucial advantage of the ABS system over a
conventional brake system is in the area of main-
taining directional control and maneuverability of
the car in emergency situations.
Warning!
The increased control that is provided should
not induce you to take greater risks with your
safety. The limits dictated by the laws of
physics cannot be overcome, even with ABS.
The risk of accidents due to inappropriate
speed cannot be reduced, even by the ABS.
The driver bears the responsibility for all
driving maneuvers.
f Adapt your driving style to the prevailing road
and weather conditions.
f Obey all traffic laws.
Other vehicles not equipped with the ABS
system may not be able to maintain control,
especially on wet or poor road surfaces and
thus may be more likely to impact you from
behind.
f To minimize that risk, use your ABS system to
increase your ability to maneuver to avoid dan-
gerous situations and not merely to try to stop in the shortest distance possible.
Operation of the ABS systemA wheel speed sensor is mounted to each of the
four wheels. If wheel lock -up of either of the front
wheels or the rear wheels is sensed during brak-
ing, the brake pressure is adjusted automatically
until the wheel no longer slips.
If braking forces approach the wheel lock-up point
for all wheels (panic brak ing) the ABS system will
intervene to provide a rapid rythmic braking. The
proper operation of ABS is perceived by the driver
as a pulsating brake pedal in conjunction with au-
dible noise and perhaps some vibration.
f If you experience these sensations while driv-
ing or a road surface with questionable trac-
tion, reduce vehicle speed appropriate for the
prevailing road conditions.
f If full braking should be necessary, press the
brake pedal all the wa y down throughout the
entire braking procedure, regardless of the pul-
sating pedal. Do not ease up on pressure ap-
plied to the pedal.
The functional readiness of all the main electrical
components of the ABS is checked by an
electronic monitoring system both before and
while you drive.