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Smart
Technology
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wireless te lecommunications
provider and the
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Audi connect.
Electronic
Stabilization
Control
(ESC)
Description
ESC helps to improve road holding and vehicle
dynamics to help reduce the probability of skid-
ding and loss of vehicle control. It works only
when the engine is running . ESC detects certain
difficult dr iving situations, including when the
veh icle is beginn ing to spin (yaw) out of contro l
and helps you to get the vehicle back under con-
trol by se lectively braking the wheels, and/or re-
ducing engine power and providing steering as-
sistance to help hold the vehicle on the driver's
intended course. The indicator light
GI
in the in-
strument cluster blinks when ESC is taking action
to help you control the vehicle.
ESC has limitations. It is important to remember
that ESC cannot overcome the laws of physics. It
will not always be able to help out under all con-
ditions you may come up against . For example,
ESC may not always be able to help you master
situations where there is a sudden change in the
coefficient of friction of the road surface. When
there is a section of dry road that is suddenly cov-
ered with water, slush or snow , ESC cannot per-
form the same way it wou ld on the dry surface. If
the vehicle hydrop lanes (rides on a cushion of wa-
ter instead of the road surface), ESC wi ll not be
able to he lp you steer the vehicle because contact
with the pavement has been interrupted
and the
vehicle cannot be braked or steered. During fast
cornering, part icularly on w inding roads, ESC
cannot always deal as effective ly w ith difficult
driving situat ions than at lower speeds . When
towing a trailer, ESC is not able to help you re-
ga in control as it would if you were not towing a
trai ler.
Always adjust your speed and driving sty le to
road, traffic and weather conditions. ESC cannot
override the vehicle's physical lim its, increase the
190
available traction, or keep a vehicle on the road if
road departure is a result of driver inattention.
Instead, ESC improves the possib ility of keeping
the vehicle under control and on the road during
extreme maneuvers by using the driver's steering
inputs to help keep the vehicle going in the in-
tended direction . If you are traveling at a speed
that causes you to run off the road before ESC
can provide any assistance, you may not exper i-
ence the benefits of ESC.
ESC is switched on all the time. In certa in s itua-
tions when you need less traction, you can sw itch
off ASR by press ing the button above
~
page 192, fig . 186 the selector lever. Be sure
to switch ASR on again when you no longer need
less traction.
The following systems are integrated
in the ESC:
Anti-lock braking system (ABS)
ABS prevents the wheels from locking up when
braking. The vehicle can still be steered even dur -
ing hard braking . Apply steady pressure to the
brake pedal. Do not pump the pedal. A pulsing in
the brake pedal indicates that the system is help -
ing you to brake the veh icle.
Brake assist system
The brake assist system can decrease braking dis-
tance. It increases braking power when the dr iver
presses the brake peda l quickly in emergency sit-
uations. You must press and hold the brake peda l
unt il the situation is over. In vehicles with adap -
tive cruise control*, the brake assist system is
more sensitive if the d ista nee detected to the ve-
hicle ahead is too sma ll.
Anti-slip regulation (ASR)
ASR reduces engine powe r when the dr ive wheels
begin to spin and adapts the force to the road
cond itions. This makes it easier to start, acceler-
ate and drive up hills.
Electronic differential lock (EDL)
The EDL brakes wheels that are spinning and
transfers the dr ive power to the other wheels.
This function is not available at higher speeds .
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