Inte l ligent Technology
Driving with your
quattro
With all-wheel drive, all four wheels are driven.
General information
With all-whee l drive, power is distributed to all
four wheels. This happens automatically d epend-
ing on you r driving style and the road condit ions
at the time. See also ¢ page 186 .
A center differentia l distrib utes the driving power
variably to the front and rear axle. It works to-
gether with selective wheel torque control, which
activates when driving t hrough curves
~ page 186 .
The all-wheel drive concept is designed for high
engine power. Your vehicle is exceptionally pow-
erful and has excellent driving characterist ics
both under normal dr iving condit ions and on
snow and ice. Always read and fo llow safety pre-
cautions ~
/1..
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 adv isa-
ble t o mount winte r tires (or all-season tires) for
improve d driveab ility and bra king: these t ires
must be mounted on
all four wheels. See a lso
¢ page 245, Winter tires.
Tire chains
Where tire chains are mandatory on certain
roads, this norma lly also applies to vehi cles with
all-whee l drive ~ page 245, Snow chains.
Replacing wheels / tires
Vehicles with all-whee l dr ive must always have
tires of the same s ize. Also avo id tires with d iffer-
ent t read depths. For details see page
~ page 237, New tires or wheels.
.&, WARNING
Always adjust your drivi ng to road and tr aff ic
condi t ions . Do not let the extra safety afford-
ed by all -wheel drive tempt you into ta king
extra risks .
192
- Although the all-wheel d rive is very effec -
tive, always remember that braking capacity
is limited by tire tract ion. You shou ld there-
fore not drive at excessive speeds on icy or
slippery road s urfaces.
- On wet road surfaces, be careful not to dr ive
too fast because the front wheels could be-
gin to slide on top of t he water (aquapla n-
ing). If th is should occur, you will have no
warn ing from a sudden increase in engine
spee d as wit h a front-wheel drive vehicle.
Always d rive at speeds which are suited to
the road conditions - risk of crash.
Energy management
· Starting ability is optimized
Energy management controls the distribution of
electrical energy and thus optimizes the availa-
bility of electrical energy for starting the engine .
If a vehicle with a conventiona l energy system is
not dr iven for a long period of time, the batte ry is
discharged by idling current consumers (e.g. im-
mobilizer) . In certain circumstances it can resu lt
in the re being insuffic ient energy ava ilable to
start the eng ine.
Intelligent energy management in your vehicle
handles the d istribution of elec t rical energy .
Start ing ability is markedly improved and the life
of the batte ry is ext ended.
Basically, energy management consists of
bat-
tery diagnosis, idling current management
and
dynamic energy management .
Battery diagnos is
Battery diagnosis continuously determines the
state of the battery. Sensors determine battery
voltage , battery current and battery tempera-
ture . This determines the current state of charge
and the power of the battery .
Idling current management
Idling cur rent management reduces energy con-
sumption while the vehicle is standing. With the ..,.
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