Driving with your
quattro
With All Whee l Drive, all four wheels are driven.
General information
With All Wheel Drive, power is dis t ribute d to all
four wheels . This happens automatically depend-
ing on your dr iving style and the road conditions
at the time . See also¢
page 190 . With the sport
d ifferent ial*, power d istr ibution to the rear
wheels is variable and can be adjusted with Audi
d rive select*
¢ page 106. Always read and fo llow
safety preca ut io ns ¢ ,&..
Winter tires
When drivi ng in the w inter, you r vehicle with All
Wheel Drive has an advantage, even with reg ular
tires. In winter road cond itions it may be adv isa-
ble t o mount w inte r t ires (or all-season tires) for
improved d riveab ility and bra king : these tires
must be mounted on
all four wheels. See a lso
¢ page 251, Winter tires.
Snow chains
Where snow chains are mandatory on certain
roads, this normally also a pplies to vehicles w it h
All Whee l Drive ¢
page 251, Snow chains.
Replacing wheels / tires
Vehicles w ith All Wheel Drive must always have
tires of the same s ize. Also avoid tires wit h d iffer-
ent tr ead depths. For detai ls see page
¢ page 243.
Off-Road driving?
Your Audi does not have e nough g round clear-
a nce t o be used as an off-road vehicle . It is there-
fore best to avoid rough tracks and uneve n ter-
rain as much as possible . Also refe r t o
¢ page 197.
_& WARNING
,~
-
Always adjust you r driv ing to road and t raffic
conditions . Do not let the extra safety affo rd-
ed by All Wheel Drive tempt you into taking
extra risks.
Sma rt Technology
- Although the All Whee l Drive is very effec-
tive, always remember that braking capacity
is limited by t ire tract ion. You shou ld there-
fore not dr ive at excessive speeds on icy or
slippe ry road surfaces .
- On wet road surfaces, be careful not to dr ive
too fast because the front wheels could be-
g in to slide on top of the water (aquap lan-
ing) . If th is should occur, you will have no
warn ing from a sudden increase in engine
speed as with a front-wheel d rive 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 driven for a long pe riod of time, the battery is
discharged by idling curre nt consumers (e.g. im-
mobilize r) . In certain circumstances it can resu lt
in t he re being insufficien t energy ava ilable to
sta rt the engine.
Intelligent energy manageme nt in you r vehicle
hand les the distribution of electrical energy .
Start ing ability is markedly improved and the life
of the ba tt ery is ext ended.
Basica lly, energy management cons ists of
bat-
tery diagnosis, idling current management
and
dynamic energy management.
Battery diagnosis
Battery d iagnosis continuously dete rm ines the
state of the battery. Sensors determine battery
voltage, battery current and battery tempera-
tu re. This de t ermines 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 ..,_
195
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