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Intelligent technology
overheat reducing the effectiveness of
the entire brake system.
- Failure of one brake circuit will impair
the braking capability resulting in an in-
creased stopping distance. Avoid driving
the vehicle and have it towed to the near-
est Audi dealer or qualified workshop.
- Never let the vehicle roll to a stop with
the engine shut off.
- If the brake booster is not working, for
example when towing your vehicle, or
because the brake booster has somehow
been damaged, the brake pedal must be
pressed considerably harder to make up
for the lack of booster assistance.
ELectro-mechanicaL
power assist
The electro-mechanical power assist helps
the driver when steering.
The degree of power assist is
electronically
matched to vehicle speed.
The power steering system assists the driver
50
that he can steer the vehicle with reduced
physical effort.
Power steering will not work if the engine is
off. As a result, the steering wheel will be hard
to turn.
Â
WARNING
If the system develops a problem, you
must seek qualified professional assis-
tance.
CD
Note
If there is an electronic malfunction, ser-
votronic will still function like a conven-
tional power steering.system, providing a
constant steering support force that is no
longer proportionate to the vehicle speed.
This is most noticeable when turning the
steering wheel at low speeds (for example
when parking), - more effort will be re-
quired than usual.
- Be aware of the different than usual
steering response and adjust your steer-
ing force accordingly.
- Have the problem checked and set right
by an authorized Audi dealer as soon as
possible.
- If a steering malfunction occurs, this is
signaled with the
~
or.. indicator
lights and a warning tone, see .
(D
Tips
- If the power steering system should fail,
or if the engine is not running (for exam-
ple, while being towed), you will still be
able to steer the vehicle. However, more
effort wi II be req uired to do
50.
- If the power steering system is not func-
tioning properly, contact your authorized
Audi dealer immediately.
Driving with your
quattro®
Applies ta vehides: with all-wheel drive
With all-wheel drive, ail four wheels are driv-
en.
General information
With all-wheel drive, power is distributed to
all four wheels. This happens automatically
depending on your driving style and the road
conditions at the
tim~ee
also
.=;.
page 153.
The all-wheel drive concepî:-is designed for
high engine power. Your vehicle is exception-
ally powerful and has excellent driving charac-
teristics both under normal driving conditions
and on snow and ice. Always read and follow
safety precautions
.=;.,&.
Winter tires
When driving in the winter, your vehicle with
all-wheel drive has an advantage,
even with
regular tires. In winter road conditions it may
be advisable to mount winter tires (or all-sea-
son tires) for improved driveability and brak-
ing: these tires must be mounted on ail four
wheels. See also
.=;.
page 213, Winter tires.
~
Snow chains
Where tire chains are mandatory on certain
roads, this normally also applies to vehicles
with all-wheel drive
'=;'page 214, Snow
chains.
Replacing wheels/tires
Vehicles with all-wheel drive must always
have tires of the same size. Also avoid tires
with different tread depths. For details see
page
.=;.
page 209, New tires and replacing
tires and wheels.
Off-Raad driving?
Your Audi does not have enough ground clear-
ance to be used as an off-road vehicle. It is
therefore best to avoid rough tracks and un-
even terrain as much as possible. Also refer to
'=;'page 163.
&.
WARNING
Always adjust your driving to road and traf-
fic cond itions. Do not let the extra safety
afforded by all-wheel drive temptyou into
taking extra risks.
- Although the all-wheel drive is
very ef-
fective, always remember that braking
capacity is limited by tire traction. Vou
should therefore not drive at
excessive
speeds on icy or slippery road surfaces.
- On wet road surfaces, be careful not to
drive too fast because the front wheels
could begin to slide on top of the water
(aquaplaning). If this should occur, you
will have no warning from a sudden in-
crease in engine speed as with a front-
wheel drive vehicle. Always drive at
speeds which are suited to the road con-
ditions. - risk of crash.
Intelligent technology
Energy management
Starting ability is optimized
Energy management controis the distribution
of electrical energy and thus optimizes the
availability of electrical energy for starting
the engine.
If a vehicle with a conventional energy system
is not driven for a long period oftime, the bat-
tery is discharged by idling current consumers
(e.g. immobilizer). In certain circumstances it
can result in there being insufficient energy
available to start the engine.
Intelligent energy management in your vehi-
cle handles the distribution of electrical ener-
gy. Starting ability is markedly improved and
the life ofthe battery is extended.
Basically, energy management consists of
battery diagnosis, idling current manage-
ment and dynamic energy management.
Battery diagnosis
Battery diagnosis continuously determines
the state of the battery. Sensors determine
battery voltage, battery current and battery
temperature. This determines the current
state of charge and the power ofthe battery.
Idling current management
Idling current management reduces energy
consumption while the vehicle is standing.
With the ig nition switched off, it controls the
energy supply to thê various electrical compo-
nents. Data from battery diagnosis is cons id-
ered.
Depending on the battery's state of charge,
individual consumers are gradually turned off
to prevent
excessive d ischarge of the battery
and thus maintain starting capability.
Dynamic energy management
While the vehicle is being driven, dynamic en-
ergy management distributes the energy gen-
erated according to the needs ofthe individu-
al components. It regulates consumption,
50
that more electrical energy is not being used
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