2009 PORSCHE CAYMAN 50 state

194
Maintenance, Car Care
Fuel Economy Fuel economy will vary depending on where,
when and how you drive, optional equipment
installed, and the general condition of your
car.
A car tuned to specifications and correctly
maintained, will help you to achieve optimal
fuel economy.
fHave your vehicle tuned to specifications.
Air cleaner should be dirt free to allow proper
engine “breathing”.
Battery should be fully charged.
Wheels should be properly aligned.
Tires should be inflated at correct pressure.
f Always monitor your fuel consumption.
f Drive smoothly, avoid abrupt changes in speed
as much as possible.
f Avoid jack rabbit starts and sudden stops.
f Do not drive longer than necessary in the lower
gears. Shifting into a higher gear early without
lugging the engine will help save fuel.
f Prolonged “warm up” idling wastes gas. Start
the vehicle just before you are ready to drive.
Accelerate slowly and smoothly.
f Switch off the engine if stationary for longer
periods. f
Any additional weight carried in the vehicle re-
duces fuel economy. Always keep cargo to a
minimum and remove all unnecessary items.
f Organize your trips to take in several errands
in one trip.
f All electrical accessories contribute to in-
creased fuel consumption.
f Only switch on the air conditioning when neces-
sary.
f Do not drive with the Ro of Transport System
mounted unless you need it.
The EPA estimated mpg. is to be used for
comparison purposes, actual mileage may
be different from the estimated mpg.,
depending on your driving speed, weather
conditions and trip length. Your actual
highway mileage will probably be less than
the estimated mpg.
f Please observe all local and national speed
limits.
Operating your Porsche in other
Countries Government regulations in the United States and
Canada require that automobiles meet specific
emission regulations and safety standards. There-
fore, cars built for the U.S. and Canada differ from
vehicles sold in other countries.
If you plan to take your Porsche outside the conti-
nental limits of the United States or Canada, there
is the possibility that
– unleaded fuel may not be available;
– unleaded fuel may have a considerably lower
octane rating. Excessive engine knock and se-
rious damage to both engine and catalytic con-
verters could result;
– service ma y be inadequa te due to lack of prop- er service facilities, tools or diagnostic equip-
ment;
– replacement parts may not be available or very difficult to get.
Porsche cannot be responsible for the
mechanical damage that could result
because of inadequate fuel, service or parts
availability.
If you purchased your Porsche abroad and want to
bring it back home, be sure to find out about ship-
ping and forwarding requirements, as well as cur-
rent import and customs regulations.

216
Practical Tips, Emergency Service
B Vehicle load limit
Is the maximum total weight limit specified of
the load (passengers and cargo) for the vehi-
cle. This is the maximum weight of passengers
and cargo that can be loaded into the vehicle.
Please see the chapter “LOADING INFORMA-
TION” on Page 224.
C Tire size for the front axle Check with your authorized Porsche dealer
about the current release status.
D Recommended tire pre ssure for the front axle
These values are for cold tires (68 °F/20 °C).
E Tire size for the rear axle Check with your authorized Porsche dealer
about the current release status.
F Recommended tire pressure for the rear axle. These values are for cold tires (68 °F/20 °C).
G In vehicles with collapsible spare wheel: Size and tire pressure of the spare wheel.
Tire traction
Warning!
When driving on wet or slushy roads, a
wedge of water may build up between the
tires and the road. This phenomenon is
known as “hydroplane” and may cause par-
tial or complete loss of traction, vehicle
control or stopping ability.
f Reduce speed on wet surface to prevent this. Tire life Tire life depends on vari ous factors, i. e., road
surfaces, traffic and wea ther conditions, driving
habits, type of tires and tire care.
f Inspect your tires for wear and damage before
driving off. If you notice uneven or substantial
wear, wheels might need alignment or tires
should be balanced or replaced.
Tire wear The original equipment tires on your Porsche have
built-in tire wear indicato rs. They are molded into
the bottom of the tread grooves and will appear as
approximately 1/2 in. (12 mm) bands when the
tire tread depth is down to 1/16 of an in.
(1.6 mm).
When the indicators appear in two or more adja-
cent grooves, it is time to replace the tires. We
recommend, however, that you do not let the tires
wear down to this extent.
Worn tires cannot grip the road surface properly
and are even less effective on wet roads.
Snow tires lose their traction capability when their
tread depth falls below 5/32 in. (4 mm).
In the United States, state laws may govern the
minimum tread depth permissible. Follow all such
laws.

220
Practical Tips, Emergency Service
Note
Under no circumstances sh
ould tires older than 6
years be used on your Porsche.
The age of the tire can be obtained from the “DOT”
code number. If, for example, the last four num-
bers read 1208, then the ti re was produced in the
12th week of 2008.
f Store tires in a cool and dry place.
Snow tires For a better grip on snow and ice, use radial M+S
tires with studs.
Check with your local Motor Vehicle Bureau for
possible restrictions.
Danger!
Risk of loss of control and damage to the
vehicle as well as seri ous personal injury or
death.
The standard tires prof ile and rubber mixture
are optimized for wet and dry driving condi-
tions, and may not prove favorable for snow
conditions.
f Therefore install M+S tires before driving in such conditions. Before mounting snow tires, consult with
your Porsche dealer. He has the technical
information necessary to advise you on
wheel and tire compatibility.
Snow tires should have the same load capacity as
original equipment tires and should be mounted on
all four wheels.
Snow tires with studs should be run at moderate
speeds when new in order to give the studs time
to settle.
Danger!
Tires with badly worn treads and studs are
very dangerous and could cause accidents
resulting in serious personal injuries or
death.
f Make sure they are replaced immediately.
f Do not drive a vehicle equipped with snow tires
at prolonged high speed.
Snow tires do not have the same degree of
traction on dry, wet or snowfree roads as a
normal tire.
Furthermore, snow tires wear rapidly under
these conditions.
Comply with all state and local laws
governing snow tire and tread depth
requirements.
Danger!
Risk of accident and se rious personal injury
or death due to excessive speed.
f Always check the maximum speed rating on
the tire sidewall on any tire on the vehicle.
f Never exceed the maximum speed rating of the tires.
f Fit winter tires to both axles well before the
cold season begins.
Your authorized Porsche dealer will be pleased
to advise you.
Maintenance note
We recommend fitting snow tires on the vehicle at
temperatures below 45 °F (7 °C) since the driving
performance of summer tires is reduced at low
temperatures. Summer tires may be permanently
damaged at extremely low temperatures.
Winter tires lose their traction capability when their
tread depth falls below 5/32 in. (4 mm).

Practical Tips, Emergency Service
221
Snow chains
Caution!
Risk of damage to body, axle or brake com-
ponents.
f Fit snow chains only to the rear wheels, and
only with the tire/rim combination listed in the
Technical Data.
To ensure adequate clearance between chain
and body, Porsche recommends only the use
of fine-link chains such as those approved by
Porsche.
f Follow instructions issued by the supplier of the chains.
Different states and countries have varying statu-
tory requirements regarding maximum speed.
Check with local authorities for possible restric-
tions.
f Remove chains as soon as the roads are free
of ice and snow. Fitting snow chains
The use of snow chains is not permitted when
5 mm spacers are mounted.
Caution!
Risk of damage to the wheel housings if the
5 mm spacers are not removed before fitting
snow chains.
f To permit the fitting of snow chains, have the 5 mm spacers removed on all 4 wheels.
f To fit/remove the spacers:
Please consult an authorized Porsche dealer.
f Please see the chapter “SPACERS” on
Page 233.
Tire designations Due to new speed and load ratings for radial tires,
new designations have come into force for snow
tires for your Porsche.
The designation to be used for ZR tires is e.g.,
265/40 ZR 18 (Z = code letter for radial tires for
speeds above 150 mph / 240 km/h).

Practical Tips, Emergency Service
225
Example for determining the combined weight of
occupants and cargoVehicle Load CapacityfThe combined weight of occupants and cargo
should never exceed the weight shown on the
tire plate in the vehicle.
Please see the chapter “TIRE PRESSURE PLA-
TE” on Page 265.
f Never exceed the number of passengers
shown on the tire pressure plate in the vehicle. Determining the combined weight of
occupants and cargo:
f
Add the weight of all occupants and then add
the total luggage weight ( figure).
Steps for determining correct load limit
1. Locate the statement "The combined weight of occupants and cargo should never exceed XXX
pounds" on your vehicle’s placard (depending
on the date of manufacture).
2. Determine the combined weight of the driver and passengers that will be riding in your vehi-
cle. 3. Subtract the combined weight of the driver and
passengers from XXX kilograms or XXX
pounds.
4. The resulting figure equals the available amount of cargo and luggage load capacity.
For example, if the ”XXX“ amount equals
400 lbs. and there will be two - 150 lb passen-
gers in your vehicle, the amount of available
cargo and luggage load capacity is 100 lbs.
(400 - 300 (2 x 150) = 100 lbs.).
5. Determine the combined weight of luggage and cargo being loaded on the vehicle. That
weight may not safely ex ceed the available car-
go and luggage load capacity calculated in
Step 4.

Practical Tips, Emergency Service
239
Battery The battery is located in the front luggage
compartment under a black plastic cover.
f Please see the chapter “EMERGENCY OPERA-
TION – PULLING OUT THE IGNITION KEY” on
Page 74.
f Please see the chapter “EMERGENCY UNLO-
CKING OF THE FRONT LUGGAGE COMPART-
MENT LID” on Page 238.
Warning!
Risk of short circuit, fire and damage to al-
ternator and electronic control units, result-
ing in serious personal injury or death.
f Observe all warning notes on the battery.
f Disconnect the negative terminal on the bat-
tery during all work on the electrical system.
f Do not lay tools or other metal objects on the
battery as they could cause a short circuit
across the battery terminal.
Hydrogen gas generated by the battery
could cause an explosion, resulting in
serious personal injury or death.
f Do not expose the battery to an open flame,
electrical spark or a lit cigarette.
f Do not wipe battery with a dry cloth.
Risk of serious personal injury or death and
damage to the fabric, metal or paint. f
Wear eye protection.
f Do not allow battery acid to come in contact
with your skin, eyes, fabric or painted
surfaces.
f If you get electrolyte, which is an acid, in your
eyes or on your skin, immediately rinse with
cold water for several minutes and call a doc-
tor.
f Spilled electrolyte must be rinsed off at once
with a solution of baki ng soda and water to
neutralize the acid.
Battery posts, terminals and related acces-
sories contain lead and lead compounds,
chemicals known to the State of California to
cause cancer and reproductive harm.
f Always protect your skin by washing thorough-
ly with soap and water.
Risk of explosion as a result of static charge,
resulting in serious personal injury or death.
f Do not wipe the battery with a dry cloth.
f Eliminate potential electrostatic charge by
touching the vehicle before touching the bat-
tery.
Charge state A well-charged battery prevents starting problems
and has a longer service life.
Traffic density, requirements regarding noise, ex-
haust gas and fuel consumption reduce the engine
speed and, hence, the alternator output.
However, the large number of electrical loads has
markedly increased the demand for electrical
power.
In order to avoid discharging the battery
unintentionally:
f Switch off unnecessary electrical loads in city
traffic, on short trips or in a line or traffic.
f Always remove the ignition key from the igni-
tion switch when leaving the car.
f Avoid frequent operation of the Porsche Com-
munication Management system and audio
system when the engine is not running.
f In the cold season in particular or if the vehicle
is used primarily for short journeys, it may be
necessary to recharge the battery from time to
time.

Practical Tips, Emergency Service
259
TowingCertain state statutes and local ordinances prohib-
it towing with a chain, rope or even a tow bar.
In addition, damage to your vehicle may result
from improper procedures.
Consult your authorized Porsche dealer for de-
tails. Vehicle towing Flat bed towing is the preferred type of towing to
be used on Porsche vehicles.
Under certain circumstances, wheel lifts may be
used when the vehicle will not roll.
The vehicle must be towed with all four
wheels off the ground, otherwise damage to
the vehicle may result.
PDK selector lever emergency releaseIn the event of an electronics failure, the selector
lever must be released for towing.
1. Lift up the rubber mat in the oddments tray.
2. Insert a screwdriver in the opening and press down until you feel it reach the limit position.
The selector lever ca n now be moved to
position N .
Towing hook The towing hook A is contained in the tool box in
the luggage compartment.
Caution!
Risk of damage to the vehicle.
f Use the towing hook only for an emergency to
remove the vehicle off the road. The towing
hook is to be used only to pull the vehicle onto
the flat bed, tractor or towing aparatus if the
vehicle will roll freely. Under no circumstances
is the vehicle to be secured using the towing
hook.
f Never use the towing hook to tow this or any
other vehicle.
f Bear in mind the limited ground clearance of your car on uneven surfaces.

Index
275
AABS (antilock brake system) .......................... 59
Warning light .......... .............................. 60
Adaptive sports seat ..................................... 33
Adjusting Headlights.... ................................ 257
Advanced Airbag......... .................................. 45
Air conditioning ........... ................................ 110
Air conditioning compressor ................ 113, 115
Air conditioning system .................... ........... 113
Air distribution ................ ............ 110, 113, 115
Air filter ...................... ................................ 201
Air intake.................... ................................ 116
Airbag ............................ .............................. 44
Cleaning covers ...... ............................ 208
Function ..................... .......................... 45
Warning light .......... .............................. 48
Air-conditioning compressor ........................ 112
Alarm system ................. ...................... 25, 103
Deactivating passenger compartment
monitoring .............. .............................. 26
Fault indication........ .............................. 26
Function indication ................................ 25
Not active .............. ............................ 236
Alcantara, cleaning . .................................... 209
Antenna ................. .................... 103, 104, 204
Antifreeze .................................................. 187
Antilock brake system (ABS) .......................... 59
Warning light .......... .............................. 60
Ashtray .......................... .............................. 89
Assembly aids for wheel changes................. 227
Audio operation .............. .................... 101, 102
Auto-button, air conditioning ........................ 113
Automatic Air conditioning system ....................... 113 Anti-glare mirrors .......................
...........30
Car washes .............. ..........................204
Door locking ............. ......................18, 24
Garage door ......... ................................76
Headlight adjustment .............................79
Speed control .........................86, 87, 124
Transmission ............ ..........................178
Automatic speed contro l..............................124
Indicator light ........ ..............................124
Average consumption .... ......................135, 165
Average speed ............. ......................135, 165
BBackrest
Adjustment ............... ............................32
Release .................... ............................32
Battery ......................... ..............................239
Care......................... ..........................240
Charge state......... ..............................239
Charging .................. ..........................240
Putting vehicle into operation ...............241
Remote control ..... ..............................244
Removing ................. ..........................242
Replacing ................. ..........................241
Warning light......... ..............................132
Winter operation.... ..............................241
Before driving off ...... ..................................8, 9
Belts ................ ............................................42
Cleaning ................... ..........................209
Tensioner ................. ............................42
Warning light......... ................................43
Blower adjustment ........ ......................110, 116
Blower speed adjustme nt ............................114 Brake
Break in ................... ............................ 10
Pads ....................... ............................ 58
Pedal....................... ............................ 57
Wear ....................... ............................ 58
Brake fluid Changing ................. .......................... 193
Checking level ...... .............................. 192
Level ....................... .......................... 192
Warning light ............ .......................... 193
Brake light .............. ................................... 256
Brake light, addition al ................................. 256
Brakes ........................ .............................. 192
Brake circuit division warning light ....... 193
Brake warning light ............................. 132
Fluid ............................ .............. 192, 271
Fluid warning light. .............................. 193
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 ....................... .......................... 247
Replacing ................ .......................... 247