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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 runn ing . ESC detects certain
difficult dr iving sit uat ions, including when t he
vehicle is begin ning to spin (yaw) out of contro l
and helps you to get the vehicle back under con-
tro l by selective ly braking the wheels, and/or re-
ducing engine powe r and provid ing steering as-
sistance to help hold the vehicle on the dr iver's
intended course. The indicator light
GJ 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
coeff icient of friction of the road surface. When
there is a section of dry road that is sudde nly cov-
ered with water, slush or snow, ESC cannot per-
form the same way it wo uld 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 help you steer the vehicle because contact
with the pavement has been interrupted and the
vehicle cannot be braked or steered. During fast
cornering, particula rly on w inding roads, ESC
cannot always deal as effect ively w it h difficult
driving sit uations tha n at lower speeds.
Always adjust your speed and driving style to
road, traffic and weather conditions . ESC cannot
override the vehicle's physical lim its, increase t he
available traction, or keep a vehicle on the road if
road departure is a result of driver inattention .
I nstead, ESC imp roves the possibi lity of keeping
Intellig e nt Technology
the vehicle under contro l and on the road during
extreme mane uvers 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 certain situa-
tions when you need less tract ion, you can switch
off ASR by pressing the button
lm c> page 188,
fig. 177 . Be sure to switc h ASR on again whe n
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 when brak-
ing. 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 ind icates that the system is acting to
stab ilize the vehicle .
Brake assist system
The brake assist system can decrease braking dis-
tance. It increases braking power when the dr iver
presses the brake pedal quickly in emergency sit-
uat ions. You must press and hold the brake pedal
unt il the dange rous situation is over. In vehicles
with adaptive cruise cont rol*, the brake assist
system is more sensitive if the distance detected
to the vehicle ahead is too small.
Anti-slip regulation (ASR)
ASR reduces engine power whe n the dr ive wheels
begin spin ning and adapts the force to the road
condit ions. This makes it easier t o st art, acceler-
ate and drive up incl ines.
Electronic differential lock (EDL)
The EDL brakes wheels that are spinning and
transfers the drive power to the other dr ive
wheel or wheels if the vehicle is equipped with all
whee l drive*) . This fu nction is not available at
highe r speeds.
In extreme cases, EDL automat ically switches off
to keep t he brake on the braked wheel from over-
heat ing . The vehicle is still working correctly. EDL
IJJ>
187
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