2010 PORSCHE CAYMAN snow chains

64
Operation, Safety
– The system compensates for undesired lateral
vehicle reactions when the driver releases the
accelerator pedal or brakes when cornering.
This compensation functions up to the
maximum lateral acceleration.
– PSM actively stabilizes the vehicle as required 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.
– It improves braking function and shortens stopping distance in the event of emergency
braking.
Readiness for operationPSM is switched on automatically every time you
start the engine.
PSM should always be switched on during
“normal” driving.
However, it may be advantageous to switch off
PSM temporarily in exceptional situations, for
example:
– On a loose surface or in deep snow,
– When “rocking” the vehicle free and
– When using snow chains.
Switching off PSMf Press PSM OFF button.
PSM is switched off after a short delay.
The light-emitting diode in the button is lit up.
When the PSM is switched off, the PSM multi-
functional light on the instrument panel is lit
and a message is shown on the on-board
computer.
An acoustic signal also sounds.
Note
When PSM is switched off, the additional braking
functions are deactivated. Automatic reactivation
in emergency situations is linked to the PSM
control. The following functions stabilize the vehicle in
emergency situations, even with PSM switched
off:
– When PSM is off, the vehicle is stabilized as
soon as one of the two front wheels enters the
ABS control range.
– When PSM is off and Sport mode is on, the vehicle is stabilized as soon as both front
wheels enter the ABS control range.
One-sided spinning of the wheels is prevented,
even with PSM switched off.
Switching PSM back onf Press PSM OFF button.
PSM is switched on after a short delay.
The light-emitting diode in the button and the
PSM multifunctional li ght on the instrument
panel go out.
The on-board computer shows a message.

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
233
SpacersfUse the spacers only together with wheels and
fastening parts approved by Porsche.
Before having spacers fitted, find out about the
current approval status.
Mounting an emergency spare wheel
If 5 mm spacers are mounted, these must not be
removed to mount an emergency spare wheel.
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.Note on operation
f
To fit/remove the spacers:
Please consult an authorized Porsche dealer.
f Please see the chapter “CHANGING A WHEEL”
on Page 227.
Removing the spacers
1. Unscrew both countersunk screws (M6x16) on the wheel hub.
2. Remove the spacer.
3. Fasten the brake disc with the short M6x12
countersunk screws, part No.:
900.269.047.09.
Tightening torque 7.5 ftlb. (10 Nm) .
4. For wheel mounting without a spacer, 5 mm
shorter wheel bolts (part No.:
997.361.203.01 ) must be used.
Tightening torque: 96 ftlb. (130 Nm) .

Technical Data
269
fWhen changing tires or fitting new ones: Please see the chapter “WHEEL BOLTS” on Page 226.
Danger!
Installation of sizes not authorized by
Porsche may have a dangerous effect on
the driving stability and could result in
serious personal injury or death.
f Before mounting new tires, check with yourPorsche dealer about the current release status.
Cayman S Tires Rim Rim offset Track
Summer tires
front 235/40 ZR 18 91Y 8 J x 18 H2 57 mm 58.5 in./1486 mm
rear 265/40 ZR 18 101Y XL 9 J x 18 H2 43 mm 60.2 in./1528 mm
or front 235/35 ZR 19 87Y 8 J x 19 H2 57 mm 58.5 in./1486 mm
rear 265/35 ZR 19 94Y 9.5 J x 19 H2 46 mm 59.9 in./1522 mm
or front 235/35 ZR 19 87Y 8.5 J x 19 H2 55 mm 58.7 in./1490 mm
rear 265/35 ZR 19 94Y 10 J x 19 H2 42 mm 60.2 in./1530 mm
Snow tires front235/40 R 18 91V M+S 8 J x 18 H2 57 mm 58.5 in./1486 mm
rear * 255/40 R 18 95V M+S 9 J x 18 H2 43 mm 60.2 in./1528 mm
The load capacity coefficient (e.g. ”91“) and maximum sp eed code letter (e.g. ”Y“) are minimum requirements.
Tire and rim sizes Extensive tests are performed before specific tires and wheels are approved by Porsche. Your Porsche dealer has information
about approved tires and wheels and is happy to assist you. If aftermarket tires and/or wheels are installed which are not
approved by Porsche, the vehicle’s roadability and handling characteristics might be impaired. Since Porsche has no data on
such combinations, Porsche cannot st and behind the safety or durability of these aftermarket combinations.
Snow chains Can be mounted only on the rear wheels; maximum speed 30 mph/50 km/h. Use only Porsche authorized fine-link
cross-type or edge chains. Snow chain clearance can be guaranteed only with the tire + rim combination marked*
without spacers. Please see the chapter “SPACERS” on Page 233.

280
Index
Heating
................................................ 37
Memory ..................... .......................... 35
Position....................................... ......... 32
Sports bucket seat ............................... 34
Sports seat ............ .............................. 33
Standard seat ......... .............................. 33
Ventilation .............. .............................. 38
Seat memory
Operating with the remote control .......... 36
Operation with person buttons ............... 35
Selector lever position ........................ 120, 122
Selector lever position indicator,
PDK transmission ....... ................................ 179
Service ...................................................... 141
SET Basic setting on on-board computer ...... 163
Shift indicator ............. ................................ 127
Shifting gears
Drive-Off Assistant... ............................ 177
Manual transmission............................ 176
Porsche Doppelkupplung (PDK) ............ 178
Side light, front ........... ................................ 256
Side marker light ........ ............................ 78, 80
Changing bulb......... ............................ 255
Side storage compartm ent ............................ 92
Side vents .................. ................................ 116
Snow chains ................... ............ 221, 267, 269
Snow tires.......................................... 220, 268
Socket ....................................................... 235
Spacers ......................... ............................ 233
Spare key ...................... .............................. 15
Spare wheel ............................................... 267
Speed code letter ....... ................................ 222
Speed control....................................... 87, 110 Automatic............... .............................. 86 Indicator light ........
.............................. 124
Speed limit ................... ...................... 137, 222
Speedometer .................................... ......... 126
Spoiler .............................................. ........... 67
Fixed ........................ ............................ 68
Retractable ................................ ........... 67
Sport Chrono Plus package CHRONO stopwatch . ........................... 144
Sport mode .............. ............................ 61
Sport mode .................. ................................ 65
PDK transmission .. .............................. 180
Switching on/off.... ................................61
Switching PASM on/o ff

.......................... 66
Sport plus mode ....... .................................... 61
Sports bucket seat ... .................................... 34
Sports exhaust system .................................. 55
Sports seat ................................... ............... 33
Stability management system ........................ 63
Standard seat ........... .................................... 33
Starter switch ........... .................................... 72
Starting ........................ ................................ 73
Starting engine ......... .................................... 75
Steering column
Locking .................... ............................ 73
Steering lock ............ .................................... 72
Steering wheel
Adjustment ........................................... 38
Function keys........ ................................ 40
Heating .................... ............................ 39
Lock ........................ ............................ 73
Multi functional ........................... ........... 40
PDK shift buttons .. .............................. 178
Stopping engine........ .................................... 76
Stopwatch .................... .............................. 144Storage options ......
......................................91
Storage possibilities ......................................91
Storing your Porsche ...................................210
Sun visors .................. ..................................41
Suspension manageme nt ...............................66
TTachometer ..................... ...........................127
Tail light .......................... ...........................256
Tank .................. ............................. ...195, 196
Ventilation system .... ...........................197
Technical data ................................. ...........266
TEL Telephone informat ion...........................141
Telephone ....................................... ...........103
Microphone.............. ...........................104
Temperature setting ......... ...........110, 113, 114
Temperature, outside in dicator.....................131
Test stand, measure ments ............................65
Theft protection ...... ......................................14
Tie-down rings ........ ......................................96
Tire Care...................................................217
Damage .............................................217
Designations ............ ...........................221
Pressure plate ......... ...........................215
Replacements .............. .......................218
Traction................... ...........................216
Wear ..................................................216
Tire pressure monitoring Warning light ............ ...........................159
Wheels ........................ .......................219
Tire pressure monitoring (TPM) ....................151
Tires ...................... ..............10, 213, 268, 269
Care...................................................213

282
Index
Washer nozzles
......
..................... ......... 82
Washer system ........................... 200, 271
Windshield
Wiper blades, changing ....................... 202
Windshield wipers ....... .......................... 82, 202
Replacing ............... ............................ 202
Winter operation Battery ............................................... 241
Coolant ...................... ........................ 187
Engine oil ............... ............................ 188
Jumper cables ............................ 245, 246
Locks ................................................ 205
Seals ................................................. 208
Snow chains ........... ............................ 221
Tires .................................................. 220
Washer fluid ........... ............................ 200
Wiper blades .......... ............................ 202
Wiper Blades ............................................... 202
Wiper blades
Care .................................................. 206
Changing.................... ........................ 202