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186
Intelligent
technolog
y
The all- wheel drive concept is designed fo r
high engine power. Your vehicle is exception -
ally powerful and has excell ent dr iving charac-
te ristics both under normal driving conditions
and on snow and ice. Always read and follow
safety precautions c:> ,&..
Winter t ires
When driving in the winte r, your vehicle with
all-whee l drive has an advantage, even with
regular t ires. In winter road conditions it may
be advisable to mount winter tires (or all-sea-
son t ires) for improved dr iveability and brak-
ing: these t ires must be mounted on all four
wheels . See also
i=> page 237, Winter tires.
Tire chains
Where t ire chains are mandatory on certain
roads, th is normally also applies to vehicles
with all -wheel drive c:>
page 238, Snow
chains.
Replacing wheels/ ti res
Vehicles w ith all -wheel drive must always
have t ires of the same size. Also avoid t ires
with diffe rent tread depths . For details see
page
c:;>
page 2 33, New tires and replacing
tires and wheels .
Off-Road 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 t racks and un-
even terrain as much as possible . Also refe r to
<=;>
page 188.
A
WARNING
Always adjust you r drivi ng to road and tr af-
fic condition s. Do not let t he ext ra safety
aff orded by all -whee l dr ive tem pt you int o
taking extra risks .
- Alt hough t he all-whee l dr ive is very ef-
f ect ive, always remember t hat braking
capacity is limited by t ire traction . You
should the refore not dr ive at excessive
speeds on icy or sli ppery road surfaces.
- On wet road surfaces, be careful not to
dr ive too fast because the front wheels
could begin to slide on top of the water
(aquaplaning). If t his should occur, you
will have no warn ing fr om a sudden in-
crease in engine speed as w ith a front-
wh eel drive vehicle . Always dr ive at
speeds wh ich are suited to the road con-
dit ions - risk of crash.
Energy
management
Starting ability is optimized
Energy management controls the distribution
of electrical energy and thus optimizes the
availability of electrical energy for starting
the engine.
If a vehicle wi t h a conventiona l energy syst em
is not driven for a long period of time, the bat-
te ry is discharged by idling current consumers
(e.g. immobilize r). 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 dist ribution of electr ical ener-
gy. Start ing ability is markedly improved and
t he life of the battery is extended .
Basically, energy management consists of
battery diagnosis, idling current manage-
ment and dynamic energy management .
Battery diagnosis
Battery diagnosis contin uously det ermines
t he state of the battery . Sensors determine
batte ry voltage, battery current and battery
temperature. This determines the current
state of charge and t he power of t he battery .
Idling current management
Idling current management reduces energy
consumption while t he vehicle is standing.
With the ign ition switched off, it controls the
energy supply to the various electrica l compo-
nent s. Data from battery diagnos is is consid-
ered.
Depending on the battery's state of charge,
individ ual consumers are gradually turned off ..,.
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