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Intelligent Technology
Electronic stabilization
control (ESC)
Description
Electronic stabilization control (ESC) supports
driver safety. It reduces the risk of slipping and
improves driving stability. ESC detects critica l sit-
uations such as the vehicle oversteering and un-
dersteering or the wheels are spinning. The vehi-
cle is stabilized by applying the brakes or reduc-
ing engine torque . As soon as the ESC is actively
regulating, the
If] indicator light blinks in the in-
strument cluster.
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 during
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 act ing to
stabilize the vehicle .
Brake assist system
The brake assist system can decrease braking dis-
tance. It increases braking power when the driver
presses the brake pedal quickly in emergency sit-
uations . You must press and hold the brake pedal
until the dangerous situat ion is over . In veh icles
with adaptive cruise contro l*, the brake assist
system is more sensitive if the distance detected
to the veh icle dr iving ahead is too small. On
vehicles with activated and functioning night vi-
sion assist*, the brake assist system can respond
more sensitively if there is a warning .
Anti-Slip Regulation (ASR)
ASR reduces eng ine power when the drive wheels
begin spinning and adapts the force to the road
conditions. This makes it easier to start, acceler-
ate and drive up hills .
Electronic differential lock (EDL)
The EDL applies the brakes to a whee l that starts
spinning and transfers the drive powe r to the
other driving wheel or wheels (if the vehicle is
Intelligent Technology
equipped with a ll wheel drive*). This function is
not avai lab le at higher speeds.
In extreme cases , EDL automatically switches off
to keep t he brake on t he braked whee l from over -
heating. The vehicle is still working correctly. EDL
will switch on again automatically when condi-
tions have returned to normal.
Power steering
The ESC can also support veh icle stability
through steering .
Selective wheel torque control
Selective wheel torque control is used when driv-
ing on curves. The front whee l on the ins ide of
the curve or both wheels on the ins ide of the
curve are braked selectively as needed. This al-
lows more precise driving in curves.
Automatic post-collision braking system
The "automat ic post-collis ion braking system"
can help to reduce the risk of sliding and of addi-
tional collisions after an accident. If the airbag
contro l module detects a collision above a certa in
vehicle speed, the vehicle is braked by the ESC.
The vehicle does not brake automatically if:
- the driver presses the accelerator pedal, or
- the braking force generated by the pressed
brake pedal is greater than the braking force
that would be initiated by the system, or
- the ESC, the brake system or the vehicle electri-
cal system are not functioning.
A WARNING
-
- The ESC and its integrated systems cannot
overcome the lim its imposed by natura l
phys ica l laws. This is especially impo rt ant
on slippery or wet roads. If the systems be-
g in acting to stabilize yo ur vehicle, you
should immediately alter your speed to
match the road and traffic conditions. Do
not let the increased safety provided tempt
you into taking risks. This could increase
your risk of a coll ision.
- Please note the risk of a coll ision increases
when dr iving fast, especially through curves
and on slippery or wet roads, and when
IIJ,,
119
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