Audi A4 2013 Owner's Manual page 188

186 Intelligent technolog y
ESC includes and/or works together with the
anti-lock brake system (ABS), brake assist sys-
tem, anti-slip regulation (ASR) , electronic dif-
ferential lock (EDL), dynamic steering" and
electronic interaxle differentia l lock* /selective
wheel torque control* . ESC is switched on all
the t ime. I n certa in situations whe n you need
less t raction, you can switch off ASR by press-
ing the but to n
[ru
¢
page
188,
fig.
176 or
¢
page
188,
fig. 177. Be sure t o switch ASR
on again when you no longer need less t rac-
tion .
Anti -lock braking system (ABS)
ABS prevents the wheels from locking up
when braki ng. The veh icle can still be steered
even during hard braking. Apply ste ady pres-
sure t o the brake pedal. Do not pump t he ped-
al. A pulsing in the brake pedal indicates t hat
the system is helping you to brake the vehicle .
Brake assist system
The brake assist system can decrease braking
dista nce. It increases braking power w hen the
driver presses the brake pedal quic kly in emer-
gency situations . You must press and hold the
brake pedal until the situation is over. In
vehicles w ith adapt ive cru ise contro l", the
brake assist system is more sensit ive if the
dista nce detected to t he vehicle ahead is too
small.
Anti-slip regulation (ASR)
ASR reduces engi ne power when the drive
wheels begin to spin and adapts the fo rce to
the road condit ions. This makes it easier to
start , accelerate and drive up hills.
Electronic differenti al lock (EDL)
The EDL brakes wheels that are spinn ing and
transfers the drive power to the other drive
wheel or whee ls if t he vehicle is equipped with
all-w heel drive*. This function is available up
to about 60 mph (100 km/h).
In extreme cases, EDL automat ically switches
off to help keep the bra ke on the braked whee l
from overheating. EDL wi ll switch on again au-
tomat ically when conditions have ret urned to
normal.
Dynamic steering*
On vehicles wi t h dynam ic st eering*, ESC helps
stabi l ize the st eering in criti cal situ at ions.
Electronic interaxle differential lock*/
selective wheel torque control*
The electr oni c int eraxle differentia l lock (front
whee l dr ive) or t he select ive whee l t orque
control (all-whee l dr ive) oper at es when dr iv-
ing t hrough curves. The front wheel on the in-
side of the curve or both whee ls on the inside
of the curve are braked selectively as needed.
This m ini mizes sliding in the front wheels and
allows for more precise driving through
curves. The applicable system may not acti-
vate when dr iving in wet or snowy cond itions.
A
WARNING
- ESC, ABS, ASR, EDL dynam ic steering*
and the elect roni c interaxle differential
lock*/se lective whee l torque cont rol *
cannot overcome the laws of physics.
This is especially important on sli ppery
or wet roads.
If
the systems beg in acting
to stabilize your veh icle, yo u should im-
mediately change your speed to match
the road and traffic conditions . Do not
let the increased safety prov ided by
these systems tempt you to take risks.
Doing so will increase the risk of a loss of
veh icle cont rol, col lision and serious per-
sonal injur ies.
- Always adapt your speed t o road, t raffi c
and weat her conditions. The risk of los-
ing cont rol of the vehicle increases when
driving too fast, especially t hrough
curves and on slippe ry or wet roads, and
when dr iving too close to vehicles up
ahead. ESC, ABS, the brake assist sys-
tem, ASR, EDL dynam ic steer ing* and the
electronic inte raxle differentia l lock*/se-
lect ive whee l to rque control* cannot pre-
-
vent collisi ons.
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