snow chains PORSCHE 911 2009 5.G Owners Manual

Operation, Safety
67
– 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 PSMfPress 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 onfPress PSM OFF button.
PSM is switched on after a short delay.
The light-emitting diode in the button and the
PSM multifunctional light on the instrument
panel go out.
The on-board computer shows a message.

Practical Tips, Emergency Service
243
Snow chains
Caution!
Risk of damage to body, axle or brake com-
ponents.
fFit 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.
fFollow 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.
fRemove chains as soon as the roads are free
of ice and snow. 911 Carrera, 911 Carrera S
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.
fTo permit the fitting of snow chains, have the 5 mm spacers removed on all 4 wheels.
fTo fit/remove the spacers:
Please consult an authorized Porsche dealer.
fPlease see the chapter “SPACERS 911
CARRERA, 911 CARRERA S” on Page 255.
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
255
Spacers911 Carrera, 911 Carrera SfUse 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.
fTo permit the fitting of snow chains, have the 5 mm spacers removed on all 4 wheels.Note on operation
fTo fit/remove the spacers:
Please consult an authorized Porsche dealer.
fPlease see the chapter “CHANGING A WHEEL”
on Page 249.
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).
Mounting the spacers

Technical Data
287
Tires, Rims, Tracks 911 Carrera, 911 Carrera S
Tire 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 10.5 J x 18 H2 60 mm 60.4 in./1534 mm
orfront 235/35 ZR 19 (87Y) 8 J x 19 H2 57 mm 58.5 in./1486 mm
rear 295/30 ZR 19 (100Y) XL 11 J x 19 H2 67 mm 59.7 in./1516 mm
orfront 235/35 ZR 19 (87Y) 8.5 J x 19 H2 55 mm 58.5 in./1486 mm
rear 305/30 ZR 19 (102Y) XL 11.5 J x 19 H2 67 mm 59.7 in./1516 mm
Snow tiresfront 235/40 R 18 91V M+S 8 J x 18 H2 57 mm 58.5 in./1486 mm
rear 265/40 R 18 97V M+S** 10.5 J x 18 H2 60 mm 60.4 in./1534 mm
orfront 235/35 R 19 87V M+S 8 J x 19 H2 57 mm 58.5 in./1486 mm
rear 295/30 R 19 100V XL M+S 11 J x 19 H2 67 mm 59.7 in./1516 mm
The load capacity coefficient (e.g. “91”) and maximum speed code letter (e.g. “Y”) are minimum requirements.
Snow chainsCan 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 on the tire + rim combination marked** without spacers.
Please see the chapter “SPACERS 911 CARRERA, 911 CARRERA S” on Page 255.
Tire and rim sizesExtensive tests are performed before specific tires and wheels are approved by Porsche. Your Porsche dealer has informa-
tion 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 driveability, stability while
in motion and handling characteristics might be impaired. Since Porsche has no data on such combinations, Porsche cannot
stand behind the safety or durability of these aftermarket combinations.
* 911 Carrera S: Summer tires 19-inch only

288
Technical Data
Tires, Rims, Tracks 911 Carrera 4, 911 Carrera 4S, 911 Targa 4, 911 Targa 4S
Tire Rim Rim offset Track
Summer tires*front 235/40 ZR 18 (91Y) 8 J x 18 H2 57 mm 58.6 in./1488 mm
rear 295/35 ZR 18 (99Y) 11 J x 18 H2 51 mm 60.9 in./1548 mm
orfront 235/35 ZR 19 (87Y) 8 J x 19 H2 57 mm 58.6 in./1488 mm
rear 305/30 ZR 19 (102Y) XL 11 J x 19 H2 51 mm 60.9 in./1548 mm
orfront 235/35 ZR 19 (87Y) 8.5 J x 19 H2 55 mm 58.6 in./1488 mm
rear 305/30 ZR 19 (102Y) XL 11.5 J x 19 H2 50 mm 60.9 in./1548 mm
Snow tiresfront 235/40 R 18 91V M+S 8 J x 18 H2 57 mm 58.6 in./1488 mm
rear 295/35 R 18 99V M+S** 11 J x 18 H2 51 mm 60.9 in./1548 mm
orfront 235/35 R 19 87V M+S 8 J x 19 H2 57 mm 58.6 in./1488 mm
rear 295/30 R 19 100V XL M+S** 11 J x 19 H2 51 mm 60.9 in./1548 mm
The load capacity coefficient (e.g. “91”) and maximum speed code letter (e.g. “Y”) are minimum requirements.
Snow chainsCan 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 on the tire + rim combination marked**.
Tire and rim sizesExtensive 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 driveability, stability while in
motion and handling characteristics might be impaired. Since Porsche has no data on such combinations, Porsche cannot stand
behind the safety or durability of these aftermarket combinations.
* 911 Carrera 4S, 911 Targa 4S: Summer tires 19-inch only

306
Index Replacing battery ................................ 266
Standby funktion ................................... 17
Synchronization .................................... 17
Replacement key .......................................... 15
Replacing bulbs .......................................... 269
Replacing wiper blades............................... 223
Retractable rear spoiler................................. 69
Rims
Diameter ............................................ 245
Dimensions ................................ 287, 288
Rim width ........................................... 245
TPM sensors ...................................... 241
Roller blind ................................................. 200
Rollover Protection System............................ 56
Roof Transport System ............... 204, 291, 292
Running in .................................................... 10
SSafety belts .................................................. 41
Cleaning ............................................. 231
Height adjustment ................................. 43
Tensioner ............................................. 41
Warning light ........................................ 42
Safety compliance sticker ........................... 284
Sealing set ................................................. 252
Seals ......................................................... 229
Care .................................................. 229
Seat
Adaptive sports seat ............................. 31
Adjustment ........................................... 30
Comfort seat ........................................ 31
Heating ................................................ 35
Memory ............................................... 33
Position................................................ 30Sports bucket seat................................ 32
Sports seat .......................................... 31
Standard seat ....................................... 31
Ventilation............................................. 36
Seat memory
Operating with the remote control .......... 34
Operation with person buttons................ 33
Selector lever position......................... 112, 114
Selector lever position indicator,
PDK transmission........................................ 171
Service ...................................................... 133
SET Basic setting on on-board computer ...... 155
Shift indicator ............................................. 119
Shifting gears
Drive-Off Assistant ............................... 169
Manual transmission............................ 168
Porsche Doppelkupplung (PDK) ............ 170
Side light, front ........................................... 277
Side marker light .................................. 80, 276
Side vents .................................................. 109
Sliding glass roof ........................................ 200
Sliding roof................................................. 178
Snow chains ............................................... 243
Snow tires .................................................. 242
Socket ....................................................... 257
Spacers ..................................................... 255
Spare key..................................................... 15
Speed code letter ....................................... 244
Speed control ............................................... 87
Automatic ............................................. 86
Indicator light ...................................... 116
Speed limit ......................................... 129, 244
Speedometer ............................................. 118
Spoiler ......................................................... 69Sport Chrono Plus package
CHRONO stopwatch ............................136
Sport mode ..........................................64
Sport mode ..................................................68
PDK transmission ................................172
Switching on/off ....................................64
Switching PASM on/off ..........................69
Sport plus mode ...........................................64
Sport tires ......................................................4
Sports bucket seat........................................32
Sports chassis ............................................298
Sports exhaust system ..................................57
Sports seat ..................................................31
Sport-type running gear ...............................298
Stability management system ........................66
Standard seat ...............................................31
Starter switch ...............................................74
Starting ........................................................75
Starting engine .............................................77
Steam cleaners...........................................224
Steering column
Locking ................................................75
Steering lock ................................................74
Steering wheel
Adjustment ...........................................37
Function keys ........................................39
Heating ................................................38
Lock.....................................................75
Multi functional ......................................39
PDK shift buttons ................................170
Stopping engine ............................................78
Stopwatch ..................................................136
Storage options ............................................91
Storage possibilities......................................91

308
Index Welcome Home Function............................... 81
Wheel .................................. 10, 235, 287, 288
Alignment ........................................... 241
Balancing ........................................... 241
Bolts .................................................. 248
Care .................................................. 235
Changing............................................ 251
Checking pressure .............................. 250
Inscription .......................................... 244
Loading information............................ 246
Securing bolts .................................... 248
Security wheel bolts ........................ 15, 96
Sidewall ............................................. 244
Size ................................................... 244
Tire pressure .............................. 236, 289
Tire pressure plate.............................. 285
Tire sealant ................................ 251, 252
Wheels
Assembly aids for wheel changes ......... 249
Care .................................................. 229
TPM sensors ...................................... 241
Windows ............................................ 181, 228
Anti-crushing protection ......................... 26
Care .................................................. 228
Opening/Closing ................................... 26
Washer nozzles .................................... 83
Washer system ..................... 83, 220, 290
Windshield
Washer nozzles .................................... 83
Wiper blades, changing ....................... 223
Wiper/washer lever ............................... 83
Windshield wipers ................................. 83, 223
Replacing ........................................... 223Windstop .................................................... 190
Installing ............................................. 190
Removing ........................................... 193
Winter operation
Battery ............................................... 263
Coolant .............................................. 207
Engine oil ........................................... 208
Jumper cables ............................ 267, 268
Locks................................................. 226
Seals ................................................. 229
Snow chains ....................................... 243
Tires .................................. 242, 287, 288
Washer fluid........................................ 220
Wiper blades....................................... 223
Wiper
Blades................................................ 223
Lever ................................................... 83
Rear..................................................... 84
Wiper blades
Care .................................................. 228
Changing ............................................ 223