Porsche 911 Manual page 18

Same Driving Pleasure, More Safety
Brake pads and brake discs are subjected to very
high stress when driving on a race circuit.
e If the brake fluid is more than 12 months old:
Replace brake fluid before driving on a race
circuit.
e Have the brake pads and brake discs checked for
wear before and after driving on race circuits.
Tyres
Tyres are also subjected to very high loads when
driving on a race circuit.
e Have tyres checked for wear before and after
driving on race circuits.
e Do not fit racing tyres. Racing tyres are not ap-
proved by Porsche.
Engine oil
e Check the engine oil level before and after driving
on race circuits.
> Please refer to chapter "Engine oil" on
page 108.
Before driving abroad
Not all Porsche models are sold in all countries. As a
result, spare parts may not be available, or the Por-
sche Partner may not be able to carry out all repair
work.
Find out the following information before driving
abroad:
– Can the vehicle be repaired if it breaks down?
16
– Does the vehicle require technical adjustments?
– Is the fuel octane rating sufficient?
– Do the headlights need to be changed to left/
right-hand traffic?
> Please refer to chapter "Vehicle Settings" on
page 246.
Data processing in the vehicle
Electronic control units are installed in your vehicle.
Some of these are required for the operational safety
of your vehicle, while others provide assistance while
driving (driver assistance systems). Moreover, your
vehicle offers comfort and entertainment functions
which are also made possible through electronic
control units.
Your vehicle has a unique chassis number. This ve-
hicle identification number (VIN) can be traced back
to the present owner and to previous owners of the
vehicle through the local authorities within the
European Union. There are also other ways of tracing
data collected from the vehicle back to the owner or
driver, e.g. using the registration number.
Storing technical data in the vehicle
Electronic control units have data memories that can
temporarily or permanently store technical informa-
tion about vehicle status, component stress, servic-
ing requirements, events or faults. Generally
speaking, this technical information documents the
status of a component, module, system or environ-
ment such as:
– Operating states of system components (e.g. fill
levels)
– Status messages about the vehicle and its indi-
vidual components (e.g. wheel revolutions,
speed, deceleration, lateral acceleration)
– Malfunctions and faults in important system
components (e.g. lights, brakes)
– Information about events that can damage the
vehicle
– The vehicle response in special driving situations
(e.g. triggering an airbag, activation of the
stability control system)
– Environmental conditions (e.g. temperature)
In addition to providing the actual vehicle function,
this data is used to detect and correct faults and
enables the manufacturer to optimise vehicle func-
tions. Most of this data is volatile and is only pro-
cessed in the vehicle itself. Only a small part of the
data is stored in event or fault memories. Moreover,
your vehicle offers comfort and entertainment
functions which are also made possible through
electronic control units.
Read-out of technical data
You can have data that is only stored locally in the
vehicle read out with the help of technical experts, e.
g. in a workshop, for a certain fee if necessary. To
comply with statutory regulations, Porsche - as the
manufacturer - may be required to release data
stored by the manufacturer in so far as is necessary
at the request of government bodies in individual
cases (e.g. investigation of an offence).
When having your vehicle serviced, service network
employees (e.g. workshops, breakdown services,
manufacturers) can read out the technical informa-
tion from the vehicle. Services include e.g. repair
services, service processes, warranty claims and