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Driving safety systems
72
G
WARNING
Adaptive Brake Assist does not react:
to people or animals
R
to oncoming vehicles
R
to crossing traffic
R
when cornering
R
As a result, the Adaptive Brake Assist may not
intervene in all critical conditions. There is a
risk of an accident.
Always pay careful attention to the traffic sit-
uation and be ready to brake.
Due to the nature of the system, complex but
non-critical driving conditions may also cause
Brake Assist to engage.
If Adaptive Brake Assist is not available due to a
malfunctioning radar sensor system, the brake
system remains available with full brake boost-
ing effect and BAS.
Adaptive brake lights
The adaptive brake lights warn following traffic
in an emergency braking situation:
by flashing brake lamps
R
by activating the hazard warning lamps
R
If you brake sharply from a speed of more than
50 km/h or if braking is assisted by BAS or BAS
PLUS, the brake lamps flash rapidly. In this way,
traffic travelling behind you is warned in an even
more noticeable manner.
If you brake sharply from a speed of more than
70 km/h to a standstill, the hazard warning
lamps are activated automatically. If the brakes
are applied again, the brake lamps light up con-
tinuously. The hazard warning lamps switch off
automatically if you travel faster than 10 km/h.
You can also switch off the hazard warning
lamps using the hazard warning button
(
page 116).
Y
®
ESP
(Electronic Stability Program)
General notes
i
Observe the "Important safety notes" sec-
tion (
page 67).
Y
®
ESP
monitors driving stability and traction, i.e.
power transmission between the tyres and the
road surface.
®
If ESP
detects that the vehicle is deviating from
the direction desired by the driver, one or more
wheels are braked to stabilise the vehicle. The
engine output is also modified to keep the vehi-
cle on the desired course within physical limits.
®
ESP
assists the driver when pulling away on
wet or slippery roads. ESP
the vehicle during braking.
ETS/4ETS (Electronic Traction System)
i
Observe the "Important safety notes" sec-
tion (
page 67).
Y
ETS traction control is part of ESP
with 4MATIC, 4ETS is part of ESP
Traction control brakes the drive wheels indi-
vidually if they spin. This enables you to pull
away and accelerate on slippery surfaces, e.g. if
the road surface is slippery on one side. In addi-
tion, more drive torque is transferred to the
wheel or wheels with traction.
Traction control remains active if you deactivate
®
ESP
.
Important safety notes
i
Read the "Important safety notes" section
(
page 67).
Y
G
WARNING
®
If ESP
is malfunctioning, ESP
stabilise the vehicle. In addition, other driving
safety systems are switched off. This increa-
ses the risk of skidding and an accident.
Drive on carefully. Have ESP
qualified specialist workshop.
When towing your vehicle with the rear axle
raised, observe the notes on ESP
(
page 337).
Y
®
If the å ESP
OFF warning lamp lights up
®
continuously, ESP
is deactivated.
®
If the ÷ ESP
warning lamp lights up contin-
®
uously, ESP
is not available due to a malfunc-
tion.
Read the information on warning lamps
(
page 275) and display messages that may be
Y
shown in the instrument cluster (
®
can also stabilise
®
. On vehicles
®
.
®
is unable to
®
checked at a
®
page 242).
Y
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