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good time, and for staying in lane. Always adapt
your driving style to suit the prevailing road and
weather conditions and maintain as afe distance
from the vehicle in front .D rive carefully.
The driving safety systems described only work
as effectively as possible when there is ade-
quate contact between the tires and the road
surface. Pay particular attention to the informa-
tion regarding tires, recommended minimum
tire tread depths etc. in the "Wheels and tires"
section ( Y
page 255).
In wintry driving conditions, always use winter
tires (M+S tires) and if necessary, snow chains.
Only in this way will the driving safety systems
described in this section work as effectively as
possible.
ABS (Anti-lock Braking System)
General information ABS regulates brake pressure in such aw ay that
the wheels do not lock when you brake. This
allows you to continue steering the vehicle when
braking.
The % ABS warning lamp in the instrument
cluster lights up when the ignition is switched
on. It goes out when the engine is running.
ABS works from as peed of about 5m ph
(8 km/h), regardless of road-surface conditions.
ABS works on slippery surfaces, even when you
only brake gently.
Important safety notes
i Observe the "Important safety notes" sec-
tion ( Y
page 54).
G WARNING
If ABS is faulty, the wheels could lock when
braking. The steerability and braking charac-
teristics may be severely impaired. Addition-
ally ,f urther driving safety systems are deac-
tivated. There is an increased danger of skid-
ding and accidents.
Drive on carefully. Have ABS checked imme-
diately at aq ualified specialist workshop.
When ABS is malfunctioning, other systems,
including driving safety systems, will also
become inoperative. Observe the information
on the ABS warning lamp ( Y
page 204) and dis- play messages which may be shown in the
instrument cluster ( Y
page 179).
Braking X
If ABS intervenes: continue to depress the
brake pedal vigorously until the braking sit-
uation is over. X
To make af ull brake application: depress
the brake pedal with full force.
If ABS intervenes when braking, you will feel a
pulsing in the brake pedal.
The pulsating brake pedal can be an indication
of hazardous road conditions, and functions as a
reminder to take extr ac are while driving.
BAS (Brake Assist System)
General information BAS operates in emergenc yb raking situations.
If you depress the brake pedal quickly, BAS
automatically boosts the braking force, thus
shortening the stopping distance.
Important safety notes
i Observe the "Important safety notes" sec-
tion ( Y
page 54).
G WARNING
If BAS is malfunctioning, the braking distance
in an emergenc yb raking situation is
increased. There is ar isk of an accident.
In an emergenc yb raking situation, depress
the brake pedal with full force. ABS prevents
the wheels from locking.
Braking X
Keep the brake pedal firmly depressed until
the emergenc yb raking situation is over.
ABS prevent st he wheels from locking.
The brakes will function as usual once you
release the brake pedal. BAS is deactivated.Driving safety systems 55
Safety Z
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Active Brak eA ssist
Gene ra li nf orm ation
i Observ et he "Importan ts afet yn otes "s ec -
tion ( Y
page 54).
Active Brake Assis tc onsists of ad istanc ew arn -
ing function wit hana utonomous braking func-
tion and Adaptive Brake Assist.
Active Brake Assis tc an help you to minimiz et he
ris kofac ol lision wit ht he vehicl einf ront or
reduce th ee ffects of suc hac ol lision .
If Active Brake Assis td etects that there is ar is k
of collision ,y ou will be warned visually and
acoustically. If you do no tr eac ttot he visual and
audible collision warning ,a utonomous braking
can be initiate dinc riti cal situations. If you apply
th eb rak ey ourself in ac riti cal situation ,A da p-
tive Brake Assis toft he Active Brake Assis ts ys-
te ms upport sy ou.
Import ant safety notesIn particular, th ed etection of obstacles can be
impaire di f:R
there is dir tont he sensor sora nythin ge lse
covering th es ensor sR
there is snow or heav yr ainR
there is interferenc ebyo th er radar source sR
there are stron gr adar reflections, for exam-
ple in parking garages R
an arrow vehicl eist ra veling in front, e.g. a
motorbik eR
av ehicl eist ra veling in fron tonad ifferen tl in eR
ne wv ehicles or after servicing is carrie do ut
on th eA ctiv eB ra ke Assis ts ystem
Observ et he important safet yn otes in th e
"Breaking-in notes" section ( Y
page 114).
Followin gd amag etot he fron te nd of th ev ehicle,
hav et he configuration and operation of th e
radar sensor checke dataq ualified specialis t
workshop .T his also applie stoc ol lision sats low
speeds wher et he re is no visible damag etot he
fron toft he vehicle.
Activating/deactivating
Active Brake Assis tisa utomatically active after
switching on th ei gnition .
You can activat eord eactivat eA ctiv eB ra ke
Assis tu sin gt he on-board computer
( Y
page 171). When deactivated, th ed istanc e warning function and th ea utonomous braking
function are also deactivated.
If Active Brake Assis tisd eactivated, th e
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Function St arting at as pee dofa ppr oximately 4m ph
(7 km/h), th ed istanc ew arning function warns
you if you rapid ly appr oac hav eh icle in front. An
intermitten tw arning tone will then soun d, and
the
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Important safety notes
G WAR NING
Adaptive Brake Assist canno ta lways clearly
iden tif yo bj ect sa nd co mple xt ra ff ic situa-
tions.
In suc hc ases, Adaptive Brake Assist can:R
interven eu nnecessar ilyR
no ti ntervene
Ther eisar is kofana cc iden t.
Always pay careful attentio ntot he traff ic sit-
uation and be read yt ob rake. Terminate the
interventio ninan on-cri tical driv ing situation.
G WAR NING
Adaptive Brake Assist does no tr eact:R
to peop le or animalsR
to oncomin gv eh icle sR
to crossing traff icR
when cornering
As ar esult, th eA da pt ive Brake Assist may not
interven eina ll critical conditions. Ther eisa
ris kofana cc iden t.
Always pay careful attentio ntot he traff ic sit-
uation and be read yt ob rake.
Due to th en ature of th es ystem, particularly
co mpli cated but non-critical driv ing conditions
may also caus eB ra ke Assist to intervene.
If adaptive Brake Assist is no ta vailab le due to a
malfunctio nint he radar sensor system, the
brak es ystem remains availab le wit hf ull brake
boostin ge ffect and BA S.
ESP ®
(Electronic Stability Program)
General notes
i Observ et he "Im portan ts afety notes" sec-
tio n( Y
page 54).
ESP ®
monitors driving st abilit ya nd traction ,i .e.
power transmission between th et ir es and the
road surface.
If ESP ®
detect st ha tt he veh icle is deviating from
th ed irection desired by th ed river, on eorm ore
wheel sa re braked to st abiliz et he veh icle .T he
engin eo utput is also mod ifie dtok ee pt he veh i- cle on th ed esired course within physical limits.
ESP ®
assists th ed river when pullin ga way on
wet or slippery roads. ESP ®
can also stabilize
th ev ehicle durin gb raking.
ETS (Electronic Traction System)
i Observ et he "Importan ts afety notes" sec-
tio n( Y
page 54).
ET St ra ction control is part of ESP ®
.
ET Sb rakes th ed riv ew heel si nd ivid ually if they
spin .T his enables you to pull away and acceler-
ate on slippery surfaces, for example if th er oad
surface is slippery on on es ide .Ina ddit ion ,m ore
driv et or que is transferred to th ew heel or
wheel sw it ht ra ction.
ET Sr emains active when you deactivate ESP ®
.
Important safety notes
G WARNING
If ESP ®
is malfunctioning, ESP ®
is unab le to
stabiliz et he vehicle .A dd it ionally, further driv-
ing safety systems are deactivate d. This
increases th er is kofs ki ddin ga nd an accident.
Drive on carefully. Hav eE SP ®
checked at a
qualified specialist workshop.
When to win gt he vehicle wit ht he rear axle
raised, observ et he note sonE SP ®
( Y
page 252).
If the
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