Intelligent technology Ill
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•
• If the power steering system has a leak or is defective, you
should immediately contact a qualified workshop.
• The power steering system requires a special hydraulic fluid.
The power steering fluid reservoir is located in the engine compart-
ment. The correct hydraulic fluid level is important for proper oper-
ation of the power steering system. The power steering fluid level is
checked according to the Audi maintenance service schedule. •
Driving with your quattro®
With All Wheel Drive, all four wheels are driven.
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 time . See also
~
page 166.
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 -season tires) for improved
driveability and braking: these tires must be mounted on
all four
wheels.
Snow chains
Where snow chains are mandatory on certain roads, this normally
also applies to vehicles with All Wheel Drive~
page 223, "Snow
chains".
Replacing wheels/tires
Only the wheel/tire sizes specified by the manufacturer may be used
on vehicles with all-wheel drive~
page 218 .
Vehicle operation
& WARNING
• Always adjust your driving to road and traffic conditions. Do
not let the extra safety afforded by All Wheel Drive tempt you into
taking extra risks.
• Although All Wheel Drive is very effective, always remember
that braking capacity is limited by tire traction. You should there-
fore 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 (aqua-
planing).
If this should occur, you will have no warning from a
sudden increase in engine speed as with a front-wheel drive
vehicle. Always drive at speeds which are suited to the road condi-
tions. - risk of crash. •
Dry sump lubrication
High lateral and longitudinal forces affect the engine and the
vehicle during sporty driving. Dry sump lubrication ensures that
your engine is supplied with oil and properly lubricated even under
these conditions.
In a "normal" vehicle the oil pump sends the oil from the oil pan to
the lubrication points in the engine. The oil then returns to the oil
pan . In extreme situations, the oil pump may draw in air, which
results in insufficient oil pressure.
With dry sump lubrication, the oil is not in the oil pan (it is "dry"),
but in a separate oil tank. While one pump supplies the engine with
oil, a second pump suctions the oil out of the engine and returns it
to the oil tank. Because the oil tank is tall and narrow, oil pressure is
constant even under extreme conditions.
In addition, the oil pan in vehicles with dry sump lubrication is
noticeably shallower. This allows the engine to be installed lower in
the vehicle, bringing down the center of gravity . This improves your
vehicle's handling. •
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