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Hill descent control
The hill descent control is switched on in off-
road mode. When slowly descending steep
gradients on loose ground or when the axles
are articulated, hill descent control provides
assistance by automatically applying the
brakes to keep vehicle speed constant. The ve-
hicle is also rendered easier to steer by selec-
tive distribution of braking force . Hill descent
control intervenes when:
- the accelerator pedal is not pressed,
- the vehicle is travelling less than 12 mph
(20 km/h),
- a steep gradient is detected,
- wheel behavior indicates loose ground or
conditions with poor adhesion (e.g. also axle
articulation) .
Hill descent control operates both dr iving f or-
ward and in reverse. Active hill descent con-
trol is deactivated by pressing the accelerator
pedal until the conditions for act ivation al-
ready listed are met again.
A WARNING
You should only switch offroad mode on if
your dr iving abilities and road conditions
permit .
- The stabilization function is limited
when offroad mode is switched on. The
dr iving wheels could spin and the vehicle
could swerve, especially on slick or slip-
pery road surfaces.
- You should on ly switch offroad mode on
when driving offroad .
(D Tips
Offroad mode cannot be switched on when
adapt ive cruise control* is switched on.
Brake system
Operating condit ions and driving hab it s
The brakes on today's automob iles are st ill
subject to wear, depending largely on operat-
ing conditions and dr iving habits ~ & . On
vehicles that are either driven mostly in stop-
Int e llig e nt technolog y 225
and-go city t raff ic or are driven hard, the
brake pads should be checked by your author-
ized Audi dealer more often than specif ied in
the
Warranty & Maintenance booklet. Failure
to have your brake pads inspected can result
in reduced brake performance.
On steep slopes, you should use the braking
effect of the engine . This way, you prevent un-
necessary wear on the brake system. If you
must use your brakes, do not hold the brakes
down cont inuously . Pump the brakes at inter-
vals.
Noises may occur when braking depending on
the speed, braking force and outside condi -
t ions such as temperature and humid ity.
Mo ist ure or road salt
Under certa in conditions, for example, when
driv ing through water or very heavy rain, or
even after washing your vehicle, the braking
effect can be reduced due to moisture (or in
freez ing cond itions ice) on the brake pads. A
few carefu l brake applications should dry off
the brake pads or remove any ice coatings.
When you are drivi ng at higher speeds with
the windshield w ipers on, the brake pads wi ll
briefly touch the brake discs in regular inter-
vals so as to improve reaction time when brak-
ing on wet surf aces. You, the drive r, wi ll not
notice anything .
The effect iveness of the brakes can be reduced
whe n the vehicle is driven on a salt- covered
road and the brakes are not used. Here too,
you should clean off accumulated salt coat ing
from brake discs and pads with a few caref ul
applications of the brake ~ & .
Corrosion
There may be a tendency for di rt to build up
on the brake pads and corros ion to fo rm on
the discs if the car is not driven regularly or
only for short trips with litt le use of the
brakes.
If t he brakes are not used frequently, or if cor-
rosion has formed on the discs, it is advisable
to clean off the pads and discs by braking .,.
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