four-wheel drive PORSCHE 911 2009 5.G Owners Manual

Operation, Safety
63
Porsche Traction Management
(PTM)With PTM, the engine power is variably distributed
to the front and rear wheels.
Power distribution between the front and rear ax-
les is performed by a map-conrolled multiple-disc
clutch.
Distribution of the engine power also depends on
the difference in wheel speed between the two ax-
les.
The multiple-disc clutch always delivers sufficient
drive power to the front wheels to ensure optimum
propulsion even on an unfavorable road surface.
In combination with the Porsche Stability Manage-
ment (PSM), the PTM ensures optimum handling
and high driving stability.
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 phy-
sics cannot be overcome, even with PTM.
The risk of accidents due to inappropriate
speed cannot be reduced, even by PTM.
The driver bears the responsibility for all dri-
ving maneuvers.
fAdapt your driving style to the prevailing road
and weather conditions.
fObey all traffic laws.
Dynamometer testing procedure Some U.S. states and Canadian provinces con-
duct emissions inspection/maintenance testing in-
volving the use of two-wheel dynamometer.
A two-wheeled dynamometer is a treadmill type
device upon which a single axle of the car, the dri-
ving axle of the vehicle, rotates to simulate vehicle
operation on the road while the vehicle remains
stationary.
Your vehicle has a full-time four-wheel drive system
which cannot be disabled. Severe damage to the
powertrain can result if tested on a two-wheel dy-
namometer.
Warning!
Risk of severe powertrain damage and a pos-
sible unexpected movement of the vehicle.
fDo not test your vehicle on a two-wheel dyna-
mometer.
fAdvise the emission station of this warning be-fore testing the vehicle.
Brake testsBrake tests must be performed only on plate-type
test stands or roller test stands.
The ignition must be off.
The following limit values must not be exceeded
on roller test stands:
– Testing speed 5 mph (8 km/h)
– Test duration 20 seconds Handbrake tests Handbrake tests on the roller test stand must only
be carried out with the ignition switched off. Balancing wheels on the vehicle During finish balancing of the wheels, the vehicle
must be hoisted and all the wheels able to rotate
freely. Towing fPlease see the chapter “TOWING” on
Page 280.Wheels/TiresThe PTM control unit is adapted to the approved
tire sizes. The use of non-approved tire sizes may
lead to deviations in wheel speeds and it may influ-
ence handling or result in the PTM switching off.

Index
303
Lids ................................................... 260
Lifting/Sliding roof.............................. 179
Tank flap ............................................ 215
Emergency service ..................................... 234
Emergency starting with
jumper cables..................................... 267, 268
Emission control system ............. 125, 218, 219
Engine
Checking the oil level........................... 153
Diagram ............................................. 299
Exhaust .................................................. 5
Number .............................................. 285
Oil consumption ............................ 10, 208
Oil level .............................................. 208
Oil level indicator................................ 153
Oil pressure ........................................ 124
Oil temperature................................... 116
Oils ............................................ 208, 290
Speeds ................................................ 10
Starting ................................................ 77
Stopping .............................................. 78
Engine compartment
Blower ......................................... 78, 120
Blower fan .......................................... 120
Care .................................................. 227
Lid ................................................. 93, 94
Lid warning light.................................... 93
Engine oil
Change .............................................. 210
Consumption ........................................ 10
Performance class .............................. 211
Recommendation ................................ 210
Topping off ......................................... 209
Viscosity ............................................ 211Exhaust
Pipes .....................................................5
System.................................................57
Tailpipes, stainless steel ......................229
External antenna .........................................100
FFabric linings ..............................................230
Filler flap ....................................................215
Filling pressure, tire.....................................289
Fire extinguisher .........................................102
Flat tire ......................................................251
Floor mats ..................................................230
Fluids .........................................................222
Fluids and fuels ...........................................290
FM reception ................................................98
Fog light, rear ...............................................80
Footbrake.....................................................58
Four-wheel drive ............................................63
Fresh air intake ...........................................109
Front lid .................................................93, 94
Fuel ................................................... 122, 215
Containers ......................................5, 217
Economy ............................................214
Evaporation control.............................217
Fuels containing ethanol.......................217
Level gage .........................................122
Level warning light..............................122
Recommendation ........................216, 217
Recommendations ..............................216
Tank ..................................................216
Function keys ...............................................39
Fuses, replacing .........................................259
GGarage
Door ................................................... 78
Door opener ...................................... 103
Lift .................................................... 254
Gear display ...................................... 112, 114
Gear shift indicator ..................................... 119
Glass rear hatch......................................... 200
Glass rear hatch (Targa)
Unlocking ............................................ 16
Glass roof.................................................. 200
Glove compartment ...................................... 92
Gong ....................................... 14, 75, 80, 129
Ground clearance ........................................... 5HHandbrake ................................................... 57
Hardtop ..................................................... 194
Putting on .......................................... 196
Removing .......................................... 194
Head restraints ............................................ 30
Headlights ................................................. 270
Adjusting ................................... 278, 279
Beam adjustment ................................. 81
Cleaning system ........................... 83, 220
Flasher ................................................ 82
Heated rear window..................................... 29
Heated rear window/Door mirror heating ..... 110
Heater ....................................................... 106
High beam
Indicator light ..................................... 119
Lever................................................... 80
High-pressure cleaning units........................ 224
Home mode................................................. 81