2009 PORSCHE BOXSTER brake wear

Warnings
165
Oil pressure gage faultyHave the fault remedied at an authorized
Porsche dealer.
Oil level display faulty Have the fault remedied at an authorized
Porsche dealer.
Oil temperature gage faulty Have the fault remedied at an authorized
Porsche dealer.
Oil temperature
too high Switch engine off and let
it cool. Check oil level
and, if necessary, add oil.
Please observe the chapter “OIL DISPLAY AND
MEASUREMENT OF THE ENGINE OIL LEVEL“.
Indicator faulty Coolant indicator failed.
Have the fault remedied at an authorized
Porsche dealer.
Brake pad wear Have the brake pads changed immediately at an
authorized Porsche dealer.
Warning – Brake fluid level Stop immediately in a suitable place.
Do not continue driving. Have the fault remedied
at an authorized Porsche dealer.
Warning – Brake circuit division Stop immediately in a suitable place. Do not continue driving. Have the fault remedied
at an authorized Porsche dealer.
ABS failure Have the fault remedied at an authorized
Porsche dealer.
PSM off Porsche Stability Management has been
switched off.
Instrument
panel On-board
computerText display on on-board
computer Meaning/measure

202
Maintenance, Car Care
Brake Fluid LevelfPlease see the chapter “EXERCISE EXTREME
CAUTION WHEN WORKING ON YOUR VEHICLE”
on Page 196.
f Use only new (unused) Original Porsche
brake fluid.
Warning!
Brake fluid is hazardous to your health, and
may be fatal if swallowed.
Brake fluid also attacks paintwork.
f Keep brake fluid out of children’s reach.
f Take care while topping off brake fluid not to
soil the luggage compartment or items of lug-gage.
Checking the brake fluid levelThe reservoir for the hydraulic braking and clutch
systems is located in the luggage compartment.
1. Open and remove cover flap A.
2. Regularly check the brake-fluid level on the transparent expansion tank through the
window B.
The fluid level should always lie between the
minimum and maximum marks. A slight decrease in the fluid level due to wear and
automatic readjustment of
the disc brakes is
normal.
If, however, the fluid level falls markedly or below
the minimum mark, the br aking system may have
developed a leak.
f Have the brake system checked without delay
at an authorized Porsche dealer.

Practical Tips, Emergency Service
223
Tires/Wheels The original equipment tires and wheel rims on
your Porsche comply with all applicable Federal
Motor Vehicle Safety Standards.
For your safety remember the following:
– Wheel rims and wheel bolts are matched to fit
your Porsche.
– If you intend to use other than original equip- ment wheels, be sure that they conform to
Porsche specifications for your model.
Only tires with the same make and with the
same specification code (e.g. “N0”, “N1”...)
can be mounted.
– The use of wheel rims and wheel bolts that do not meet specifications of the original factory
installed equipment will affect the safe opera-
tion of your vehicle.
– Before you plan on exchanging wheels, or snow tires already mounted on the wheel rims,
consult your authorized Porsche dealer. Your
dealer has the technical information necessary
to advise you which wheel rims and wheel bolts
are compatible with the original factory instal-
lations.
Danger!
Risk of loss of contro l and serious personal
injury or death.
f If while driving, your vehicle experiences a sud-
den vibration or ride disturbance, and/or you
suspect that possible damage to your tires or
vehicle has occurred, you should immediately
reduce your speed without excessive use of
the brakes.
f Stop the vehicle as soon as possible, and in-
spect the tires.
If you cannot determine the cause for the dis-
turbance, have your vehi cle towed to the near-
est Porsche or tire dealer to have your vehicle
or tire(s) inspected.
f Continuing to operate the vehicle without cor-
rection could result in a loss of control and serious personal injury.
ExampleUniform Tire Quality GradingQuality grades can be fo und where applicable on
the tire sidewall between tread shoulder and max-
imum section width.
All passenger car tires must conform to Federal
Safety Requirements in a ddition to these grades.
Tr e a d w e a r
The treadwear grade is a comparative rating
based on the wear rate of the tire when tested
under controlled conditions on a specific govern-
ment test course.
For example, a tire graded 150 would wear one

Practical Tips, Emergency Service
227
Danger!
Driving on worn tires can result in loss of con-
trol of the vehicle an d could cause serious
personal injuries or death.
f Do not drive with worn tires or tires showing
cuts or bruises as they may lead to sudden
deflation and loss of control which could cause
severe personal injury.
f Specialized high performance tires on high
performance sports cars exhibit more wear
than those on a family sedan, or even a high
performance sedan.
Therefore, it is important to check your tire
pressure and condition at least every two weeks.
If you notice that tires are wearing unevenly, con-
sult your Porsche dealer.
Uneven wear may not always be due to improper
wheel alignment. It can be the result of individual
driving habits such as cornering at high speeds. If
the tire pressure is not checked and adjusted
regularly, abnormal tire wear can also occur.
Tire care f Avoid damaging tires and wheel rims.
f If you must drive over a curb or other obstacle,
drive slowly and at an obtuse angle.
f Check tires for uneven wear and damage
before driving off.
f Remove imbedded material.
f Replace worn or damaged tires immediately.
f Keep oil, fuel, brake fluid, etc. away from tires.
f Replace missing valve stem caps.
f Keep tires inflated correctly.
f Wash tires when washing the vehicle. Also
clean inner side of wheels.
f Do not use abrasive cleaners when washing
the wheels.
f Check wheel rims for corrosion.
f Remove road salt, if driving in winter.
Tire damage, puncture High-pressure cleaning units can damage the
tires.
f Please see the chapter “HIGH-PRESSURE
CLEANING UNITS, STEAM CLEANERS” on
Page 213.
f Check tires for imbedded material, cuts, punc-
tures, cracks and bulges (side wall) before driv-
ing off.
In case of tire damage, where it is uncertain wheth-
er there is a break in the ply with all its conse-
quences or tire damage caused by thermal or me-
chanical overloading due to loss of pressure or
any other prior damage, we recommend that the
tire be replaced for safety reasons.
If one faulty tire is replaced it should be noted that
the difference in tread depth on one axle must not
exceed 30%.
Handling inconsistencies may result.
f Perform a visual inspection if necessary.

Index
285
AABS (antilock brake system) .......................... 59
Warning light .......... .............................. 60
Adaptive sports seat ..................................... 33
Adjusting Headlights.... ................................ 267
Advanced Airbag......... .................................. 45
Air conditioning ........... ................................ 106
Air conditioning compressor ................ 109, 111
Air conditioning system .................... ........... 109
Air distribution ................ ............ 106, 109, 111
Air filter ...................... ................................ 211
Air intake.................... ................................ 112
Airbag ............................ .............................. 44
Cleaning covers ...... ............................ 219
Function ..................... .......................... 45
Warning light .......... .............................. 48
Air-conditioning compressor ........................ 108
Alarm system ................. ........................ 25, 99
Deactivating passenger compartment
monitoring .............. .............................. 26
Fault indication........ .............................. 26
Function indication ................................ 25
Not active .............. ............................ 246
Alcantara, cleaning . .................................... 219
Antenna ................. ...................... 99, 100, 214
Antifreeze .................................................. 197
Antilock brake system (ABS) .......................... 59
Warning light .......... .............................. 60
Ashtray .......................... .............................. 87
Assembly aids for wheel changes................. 237
Audio operation ...................................... 97, 98
Auto-button, air conditioning ........................ 109
Automatic Air conditioning system ....................... 109 Anti-glare mirrors .......................
...........30
Car washes .............. ..........................214
Door locking ............. ......................18, 24
Garage door ......... ................................76
Headlight adjustment .............................79
Speed control .........................84, 85, 120
Transmission ............ ..........................174
Automatic speed contro l..............................120
Indicator light ........ ..............................120
Average consumption .... ......................131, 161
Average speed ............. ......................131, 161
BBackrest
Adjustment ............... ............................32
Release .................... ............................32
Battery ......................... ..............................249
Care......................... ..........................250
Charge state......... ..............................249
Charging .................. ..........................250
Putting vehicle into operation ...............251
Remote control ..... ..............................254
Removing ................. ..........................252
Replacing ................. ..........................251
Warning light......... ..............................128
Winter operation.... ..............................251
Before driving off ...... ..................................8, 9
Belts ................ ............................................42
Cleaning ................... ..........................219
Tensioner ................. ............................42
Warning light......... ................................43
Blower adjustment ........ ......................106, 112
Blower speed adjustme nt ............................110
Brake Break in ...................
............................ 10
Pads ....................... ............................ 58
Pedal....................... ............................ 57
Wear ....................... ............................ 58
Brake fluid
Changing ................. .......................... 203
Checking level ...... .............................. 202
Level ....................... .......................... 202
Warning light ............ .......................... 203
Brake light .............. ................................... 266
Brake light, addition al ................................. 266
Brakes ........................ .............................. 202
Brake circuit division warning light ....... 203
Brake warning light ............................. 128
Fluid ............................ .............. 202, 281
Fluid warning light. .............................. 203
Function .................. ............................ 56
New brake pads or linings ..................... 58
Pads ....................... ............................ 10
Parking brake....... ................................ 55
Porsche Ceramic Composite Brake
(PCCB) .................................... .............. 4
Test stand ........... ................................ 65
Break in brakes ....... ..................................... 10
Break in hints .......... ..................................... 10
Bulbs
Chart ....................... .......................... 257
Replacing ................ ..........................2

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