2009 PORSCHE PANAMERA wheel torque

Driving and Driving Safety
201
Transmission and Chassis Control SystemsYour Porsche features a complex integrated system made up of all control systems acting in power transmission and in the chassis.
All control systems are networked with the aim of combining the best possible driving performance with maximum safety.
The following systems are invo lved, depending on equipment:
System/designation Scope
PTM
Porsche Traction Management – Active all-wheel drive with electronically
regulated map-controlled multiple-disc clutch
PSM
Porsche Stability Management – Driving stability control
– Anti-lock brake system (ABS)
– Brake system prefilling
– Brake booster (Hydraulic Brake Assist)
– Automatic brake differential (ABD)
– Anti-slip control (ASR)
– Engine drag torque control (MSR)
– HOLD function: standstill management
Air suspension
with level control and height adjustment – Full load-bearing air-spring stru
ts with integrated shock absorbers
– Height adjustment with Low Level setting in “S port Plus” mode and High Level setting for
maneuvering
PAS M
Porsche Active Suspension Management – Shock absorber system with adaptive, continuous shock absorber control
PDCC
Porsche Dynamic Chassis Control – Active chassis control system to stabilise
roll tendency of vehicle body when driving
– Controlled rear differential lock

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Driving and Driving Safety
Porsche Traction Management
(PTM)Porsche Traction Management is an active all-
wheel control system designed to influence
longitudinal and lateral dynamics. It is closely
linked with the Porsche Stability Management
(PSM) system.
The permanently driven rear axle enhances the
vehicle’s sporty features. Drive power is
distributed fully variably to the front axle,
depending on the driving situation.
In conjunction with PSM, the PTM system ensures
perfect distribution of power among all four
wheels in every driving situation. This improves
traction and driving stabil ity and ensures the same
high level of agility and dynamic response.
Warning!
In spite of the advantages of PTM and four-wheel
drive, it is still the driver’s responsibility to adapt
his driving style and maneuvers in line with road
and weather conditions, as well as the traffic
situation.
The increased safety that is provided should not
induce you to take greate r risks with your safety.
The limits set by the physics of driving cannot be
overcome, even with PTM or four-wheel drive.
Risk of accidents due to inappropriate speed
cannot be reduced by PTM or four-wheel drive. Advantages of PTM
– Clearly perceptible improvement in traction,
driving stability and steering ability of the
vehicle.
– Vehicle is more manageable when driven at its performance limits.
– Improved straight-ahead tracking and greater stability.
– More sporty vehicle setup while making full use of all the advantages of four-wheel drive.
– ASR and ABD further enhance traction for all wheels.
For information on ASR and ABD:
f Please see the chapter “PORSCHE STABILITY
MANAGEMENT (PSM)” on page 202.
Porsche Stability Management
(PSM)PSM is an active control system for stabilisation of
the vehicle during extreme driving maneuvers.
It operates together with the Porsche Traction
Management (PTM) system provided the vehicle is
fitted with the relevant equipment.
PSM makes use of both the ABD and ASR
systems, as well as the known functions of the
anti-lock brake system (ABS) and engine drag
torque control system (MSR).
Warning!
In spite of the advantages of PSM, it is still the
driver’s responsibility to adapt his driving style and
maneuvers in line with road and weather
conditions, as well as the traffic situation.
The increased safety that is provided should not
induce you to take greater risks with your safety.
The limits set by the physics of driving cannot be
overcome, even with PSM.
Risk of accidents due to inappropriate speed
cannot be reduced by PSM.

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Driving and Driving Safety
– Brake system prefilling:
The brake system is prepared for possible
subsequent emergency braking if the
accelerator pedal is released suddenly and
quickly. The brake system is prefilled and the
brake pads are already applied gently to the
brake discs.
– Brake booster (Hydraulic Brake Assist): In the event of an emergency braking operation
where the pedal force is insufficient, a brake
booster provides the braking pressure
necessary for maximum deceleration at all
4wheels.
Combined operation of PSM and PTM
In order to ensure optimum stabilisation of the
vehicle, torque distribution between the front and
rear wheels is adapted and the rear differential
lock is controlled on vehicles with PDCC.
In the event of a PTM fault, PSM cannot be
switched off.
If PSM is switched off, it is switched on again
automatically. Automatic brake differential (ABD)
The ABD system controls the front and rear axles
separately. If one wheel of an axle starts to spin,
it is braked so that the other wheel on the same
axle can be driven.
ABD recognizes different driving states, and it
features control strategies adapted to these
states. In situations in which little propulsive power
is required, such as when the vehicle moves off on
a level gravel surface, traction control already
becomes active at low engine speeds. If a large
amount of propulsive power is required, e.g. when
driving off on an uph
ill slope or for rapid
acceleration, the ABD system is adapted
accordingly.
Anti-slip control (ASR)
The anti-slip control system prevents the wheels
from spinning by adjusting the engine power,
thereby ensuring good lane-holding ability and
stable handling.
Engine drag torque control (MSR)
In conditions of excessive slip, the engine
drag torque control system prevents all driven
wheels from locking up when the vehicle is
overrunning. This is also the case for downshifts
on a slippery road.
Switching off PSMf Press button for at least 1 second.
PSM is switched off after a short delay.
The indicator light on the button and the
PSM OFF warning light on the instrument
panel light up.
The warning “PSM off” appears on the
multi-function display in the instrument panel.

286
Minor Repairs
Self-adhesive weights must not come into contact
with cleaning agents, since they could drop off.
Uneven tread wear indica
tes wheel imbalance. In
this event, the vehicle should be checked at an
authorized Porsche dealer.
Danger!
If, during a trip, uneven running or vibrations
occur that could be caused by damage to
tires or the car, the speed must be reduced
immediately, but without braking sharply. If
you continue your trip without having the
cause of the fault reme died, you might lose
control of your vehicle which could cause
serious personal injury or death.
f Stop the vehicle and check the tires.
f If no cause for the fault can be found, drive
carefully to the nearest authorized Porsche dealer.
Wheels with Tire Pressure Monitoring
(TPM) sensorsBefore changing wheels, make sure that the
wheels are compatible with your vehicle’s TPM.
fCheck this with your authorized Porsche
dealer.Removing and storing tiresfAfter changing, adjust tire pressure and torque
wheel bolts diagonally.
Please see the chapter “CHANGING A WHEEL”
on page 291.
f Store tires in a co ol and dry place. Rotate
periodically to avoid flat spots.
f Avoid contact with fuel, oil and grease.
Tires must always remain on the same side of
the vehicle.
When wheels are removed, the direction of
rotation and position of each wheel should be
marked. Example
FR (front right), FL, RR and RL.
Wheels must always be fitted in accordance with
their marking.
The perception that tire durability and
performance are not affected by storage and age
is unfounded.
Chemical additives, which make the rubber
elastic, lose their effectiveness over the course of
time and the rubber becomes brittle and cracks.
Therefore, the tires should be inspected from
time to time.
Note
Under no circumstances should 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 three
numbers read 1208, then the tire was produced in
the 12th week of 2008.

292
Minor Repairs
Screw in one assembly aid on vehicles without PCCB8. Screw in assembly aids instead of wheel bolts.
Caution!
Risk of damage to brake discs.
f Always screw in the assembly aids when changing a wheel.
Screw in two assembly aids on vehicles with PCCB9. Remove the remaining wheel bolts.
10.Take the wheel off and put a new wheel on.
fPlease see the chapter “WHEEL BOLTS” on
page 293.
11.Insert wheel bolts and tighten by hand.
12.Remove assembly aids and screw in remaining wheel bolts.
Initially tighten bolts only slightly in
diagonally opposite sequence so that
the wheel is centerd. 13.Inflate the tire if necessary.
f
Please see the chapter “TIRE PRESSURE FOR
COLD TIRES (68 °F/20 °C)” on page 326.
14.Lower the vehicle fully and remove the jack.
15.Tighten wheel bolts in diagonally opposite sequence.
Immediately after changing a wheel, use
a torque wrench to check the prescribed
tightening torque of the wheel bolts
(160 Nm/118 ftlb.).
Note on operation for vehicles with Tire
Pressure Monitoring
f On vehicles with Tire Pressure Monitoring, the
settings on the multi-function display must be
updated after the wheel change.
f Please see the chapter “TIRE PRESSURE
MONITORING (TPM)” on page 127.

Minor Repairs
293
Wheel Bolts fAlways clean the wheel bolts before fitting.
f Wheel bolts must not be greased.
f Replace damaged wheel bolts.
Only use genuine Porsche wheel bolts
assigned especially to this model or wheel
bolts of similar quality that have been
manufactured according to Porsche
specifications and production requirements.
Tightening torque
Tightening torque for wheel bolts: 160 Nm
(118 ftlb.) .
Security wheel boltsThe adapter (wrench socket) for the security
wheel bolts is stored in the tool tray under the
luggage compartment floor.
fIf the wheels have to be removed at the
workshop, do not forget to hand over the
socket for the security wheel bolts along
with the car key.
f To loosen or tighten the wheel bolt with anti-
theft protection, the adapter must be used
between the wheel bolt and the wheel
bolt wrench.
f When positioning the wrench socket, ensure
that it engages fully in the teeth of the
wheel bolt.
Flat Tire 1. Stop the vehicle as far away from the driving lane as possible.
The vehicle must be parked on a firm and flat
surface offering adequate grip.
2. Switch emergency flasher on.
3. Apply the parking brake.
4. Put the vehicle in 1st gear or move the PDK selector lever to position P.
5. Straighten the front wheels.
6. Remove the ignition key, or the control unit on vehicles with Porsche Entry & Drive, in order to
lock the steering and pr event the engine from
being started.
7. Get all passengers to leave the vehicle.
8. Set up the warning triangle at a suitable distance.Filling in tire sealantThe tire sealant and compressor with pressure
tester can be found in the tool tray under the
loadspace floor in the luggage compartment.
The tire sealant can be used to seal small cuts,
especially in the tire tread.
Sealing the tire with the tire sealant is only an
emergency solution so you can drive to the
nearest workshop. Even if the tire is air-tight,

340
Index
Switching automatic anti-dazzle function on and off .......... 60
Switching child protection on/off Disabling rear control pane l and power windows .... 80
Switching MONO mode on/off Air-conditioning system ........................................ 74
Switching on air-recirculation mode Air-conditioning system ........................................ 74
Switching on parking light .. ............................................ 96TTachometer
Display................ ...................................... ........ 110
Tailgate Closing ..................................................... .......... 26
Closing automatically .. ......................................... 28
Opening .............. ...................................... .......... 25
Opening automatically ..... ..................................... 27
Tailpipes Stainless steel, care inst ructions......................... 274
Tank Ventilation system........... ................................... 269
Technical data Driving performance ....... ................................... 329
Engine ................ ...................................... ........ 324
Tire pressure (psi/bar) ....................................... 326
Tires, wheels ... .................................................. 325
Weights .............. ...................................... ........ 328
Technical modification s to the vehicle, information ......... 253
Telephone.................................... ............................... 190
Using via multi-function display ............................ 125
Test stands Brake test ...................... ................................... 253
Performance test ............ ................................... 253
Theft protection ................... ......................................... 18
Tie-down rings................... .......................................... 228
Tie-down rings, fastening points in luggage
compartment ............................... ............................... 227
Tire Care ................... ...................................... ........ 284
Life ..................... ...................................... ........ 283
Traction .................................................... ........ 281
Wear......................................................... ........ 283
Tire pressure ........ ...................................................... 326
Air pressure (psi/bar) .. ....................................... 326
Data (psi/bar) ............. .......................................
326Filling information ..........
..................................... 129
Selecting comfort pressu re ................................ 131
Speed warning .................. ................................. 131
System learning ............ ..................................... 134
Tire pressure plate ........ ..................................... 323
Tire type information ..... ..................................... 130
Warnings .............. ............................................. 133
Tire Pressure Monitoring (T PM) ..................................... 127
Tire pressure plate ......... ............................................. 323
Tire sealant ......... ........................................................ 279
Tire sealant/sealing set For defective ti res ................. ............................. 293
Tires Breaking in new tires ..... ......................................... 6
Changing .............. ............................................. 292
Damage ................................... ......................... 284
Fixing a flat tire ......... ......................................... 293
General information ....... ..................................... 280
Inscription on radial tire ...................................... 288
Replacing .......... ................................................ 285
Rim offset ......... ................................................ 325
Sealant ................ ............................................. 293
Setting type and size ..... ..................................... 132
Sidewall ............... ............................................. 288
Size ..................... ............................................. 325
Snow chains (general info rmation) ....................... 288
Storage................ ............................................. 286
Tire pressure plate ........ ..................................... 323
Tire pressure, data (psi/b ar) ............................... 326
Valves .................. ............................................. 285
Winter tires (general info rmation)
......................... 287
Tool kit ............... ........................................................ 279
Tools ...................... .................................................... 279
Torque, Technical data........ ......................................... 324
Towing Screwing in towing lug... ..................................... 319
Towing lug in tool kit . ......................................... 279
Tow-starting ............ .................................................... 321
Tracks .................... .................................................... 330
Transmission Porsche Doppelkupplung (P DK) ........................... 193
Transmission and cha ssis control systems
Overview (PTM, PSM, PASM , PDCC) .................... 201
Transport (on car trai ns, ferries, etc.)
Securing the vehicle ...... ..................................... 320
Switching off inclination sensor ............. .............. 247Trip counter
Display ............... .............................................. 112
Resetting ............ .............................................. 112
Trip information ................ .......................................... 126
Turn signal, changing side tu rn signal light .................... 312
Turn signal, stalk .............. ............................................ 96
UUltrasound sensor, ParkAssi st ..................................... 239
Undercoating, care instruct ions.................................... 273
Universal audio interface, inst allation position ................ 192
Unlocking Opening vehicle door from inside .......................... 31
Unlocking and opening tail gate ............................. 25
Unlocking vehicle door fr om inside........................ 32
Unlocking vehicle door with car key (remote control) ..
23
Unlocking vehicle door wi th Porsche Entry & Drive
(keyless) ......... .................................................... 23
Upshift prompt....... .......................................... ........... 112
USB interface, installation position................................ 192
Using engine residual heat .................................... ......... 71
Air-conditioning system ........................................ 71VVanity mirror...... .............................................. ............. 64
Vehicle Battery ............... .............................................. 191
Keys .................. ................................................ 19
Storage .............. .............................................. 304
Vehicle data........... .......................................... ........... 323
Vehicle door Locking from inside ..... ........................................ 31
Locking with car key (rem ote control) ................... 24
Locking with Porsche Entry & Drive (keyless) ......... 24
Malfunctions when opening and closing ................. 35
Switching child lock for re ar doors on/off.............. 32
Unlocking with car key (remote control)................. 23
Unlocking with Porsche Entr y & Drive (keyless) ...... 23
Vehicle information Retrieving on multi-functi on display ..................... 119
Vehicle key (remote control) Changing battery ............. .................................. 307