G
WARNING
If you leave children unattended in the vehi-
cle, they may be abletos et the vehiclein
motion if, for example, they:
R release the parking brake
R shift the automatic transmission out of park
position Por shift manua ltransmission into
neutral
R start the engine
In addition, they may operate vehicl eequip-
ment and become trapped. There is arisk of
an accident and injury.
When leaving the vehicle, alwayst ake the key
with you and lock the vehicle. Never leave
children unattended in the vehicle. G
WARNING
If persons (particularly children) are exposed
to heatorc old foraprolonged period, there is
ar isk of serious or even fatal injuries. Never
leave persons (particularly children) unatten-
ded in the vehicle. G
WARNING
If the child restraint system is placed in direct sunlight, the parts coul dbecome very hot.
Childre ncouldbes uffer burns by touching
these parts, in particular on the metallic parts
of the child restraint system. There is arisk of
injury.
If you and yourc hild leave the vehicle, always
make sure that the child restraint system is
not in direct sunlight. Cove ritwithablanket,
for example. If the child restraint system has
been expose dtodirect sunlight, leave it to
cool downb efore securing the child in it.
Never leave children unattended in the vehi-
cle. Child-proof locks for the rear doors Rea
rdoor child-proof lock (example: Saloon)
You secure each door individually with the
child-proof locks on the rear doors. Adoor
secure dwithachild-proof lock cannot be
opened from insid ethe vehicle. When the
vehicl eisunlocked ,the door can be opened
from the outside.
X To activate: press the child-proof lock
leve rupint he direction of arrow :.
X Make sure that the child-proof locks are
working properly.
X To deactivate: press the child-proof lock
leve rdow nint he direction of arrow ;.
Override feature for the rear side win-
dows X
To enable/disable: press button;.
If indicator lamp :is lit, operation of the
rear side windows is disabled. Operation is
only possible using the switches in the driv- er's door. If indicator lamp :is off, oper- 76
Children in the vehicleSafety
atio
nisp ossible usin gthe switches in the
rear compartment. Pet
sint hevehicle G
WARNING
If you leave animals unsupervised or unse-
cured in th evehicle ,the ym ay push abutton
or as witch ,for example.
They could:
R activat evehicle equipmen tand become
trapped, for example
R switch vehicle systems on or off ,thus
endangering other road users
In th eevent of an accident, sudde nbraking or
abrupt changes of direction ,unsecured ani-
mals could be flun garoun dthe vehicle ,injur-
ing th evehicle occupants .Ther eisar iskofan
acciden tand injury.
Never leave animals unattende dinthevehi-
cle .Always secure animals correctly durin ga
journey, e.g .inananimal transpor tbox. Driving safety systems
Driving safety systems overview
In this section, you will fin dinformatio nabout
th ef ollowin gdriving safety systems:
R AB S(Anti-lock Braking System)
(Y page 77)
R BA S(Brake AssistSystem) (Y page 78)
R BA SP LUS(Brake AssistSystem PLUS) with
Cross-Traffic Assist (Y page 78)
R COLLISION PREVENTION ASSIST PLUS
(distanc ewarning function and Adaptive
Brake Assist )(Y page 80)
R Adaptive brak elamps (Y page 83)
R ESP ®
(E lectronic Stability Program)
(Y page 83)
R EB D( electronic brakeforce distribution)
(Y page 86)
R ADAPTIV EBRAKE (Y page 86) R
PRE-SAFE ®
Brake (Y page 87)
R STEE RCONTROL (Y page 89) Important safety notes
If you fail to adapt your driving style or if you
are inattentive, th edriving safety systems can
neither reduc ethe riskofana ccidentnor
override th elaws of physics. Drivin gsafety
systems are merely aids designe dtoassist
driving .You are responsible for maintaining
th ed istanc etothevehicle in front, for vehicle
speed, for braking in good time, and for stay- ing in lane .Always adapt your driving style to
suit th eprevailin groad and weather condi-
tions and maintain asafe distanc efromt he
vehicle in front. Drive carefully.
The driving safety systems describe donly
work as effectivel yaspossible when there is
adequat econtac tbetween th etyres and the
road surface. Pleas epay special attentio nto
th en otes on tyres, recommended minimum
tyr etread depths etc. (Y page 416).
In wintry driving conditions, always use winter
tyres (M+ Styres) and ,ifnecessary, snow
chains .Onlyint hisw ay will th edriving safety
systems describe dinthiss ectio nwork as
effectivel yaspossible. ABS (Anti-lock Braking System)
General notes AB
Sr egulate sbrak epressure in suc haway
that th ewheels do no tloc kw hen you brake.
This allows you to continue steering th evehi-
cle when braking.
The yellow !ABSw arning lamp in the
instrumen tcluste rlight supw hen th eignition
is switched on .Itgoes out when th eengineis
running.
Important safety notes i
Observ
ethe "Important safety notes" sec-
tio n(Ypage 77). Driving safety systems
77Safety Z
G
WARNING
If ABS is faulty, the wheels coul dlock when
braking. The steerability and braking charac-
teristics may be severely impaired .Addition-
ally, further driving safety systems are deac-
tivated. There is an increased dange rofskid-
ding and accidents.
Drive on carefully.H ave ABS checked imme-
diately at aqualified specialist workshop.
If ABS is malfunctioning, other systems,
including driving safety systems ,willa lso
become inoperative. Observe the information on the ABS warning lamp (Y page332) and
display messages which may be show ninthe
instrument cluster (Y page300).
ABS works from aspee dofa bout8km/h,
regardless of road-surface conditions. ABS
works on slippery surfaces, even when you
only brake gently.
Brakes X
If ABS intervenes: continue to depress the
brake peda lwith force until the braking sit-
uation is over.
X To make afull brake application:
depress the brake peda lwith full force.
If ABS intervenes when braking, you willf eel a
pulsing in the brake pedal.
The pulsating brake peda lcan be an indica-
tion of hazardous road conditions; this serves
as areminde rtotake extra care while driving. BAS (Brake Assist System)
General notes BAS operates in emergency braking situa-
tions. If you depress the brake peda lquickly,
BAS automatically boosts the braking force,
thus shortening the stopping distance. Important safety notes i
Observe the "Important safety notes" sec-
tion (Y page77). G
WARNING
If BAS is malfunctioning, the braking distance
in an emergency braking situation is
increased. There is arisk of accident.
In an emergency braking situation, depress
the brake peda lwith full force. ABS prevents
the wheels from locking.
Brakes X
Keep the brake peda ldepressed firmly until
the emergency braking situation is over.
ABS prevents the wheels from locking.
The brakes willf unction as usual once you
release the brake pedal. BAS is deactivated. BAS PLUS(
Brake Assist System
PLUS) with Cross-Traffic Assist
General notes i
Observe the "Important safety notes" sec-
tion (Y page77).
BAS PLUS is only available on vehicles with
the Driving Assistance package.
For BAS PLUS to assist you when driving, the
rada rsensor system and the camera system
must be operational.
With the help of asensor system and acam-
era system, BAS PLUS can detect obstacles:
R that are in the path of yourv ehiclefor an
extended period of time
R that cross the path of yourv ehicle
In addition, pedestrians in the path of your
vehicl ecan be detected.
BAS PLUS detects pedestrians using typical
characteristics such as the body contours
and posture of aperso nstanding upright.
If the rada rsensor system or the camera sys-
tem is malfunctioning, BAS PLUS functions
are restricted or no longer available.T he78
Driving safety systemsSafety
brake system is still available with complete
brake boostin geffec tand BAS.
i Observ
ethe restrictions described in the
"Important safety notes" section
(Y page 79).
BASP LUS can help you to minimis ethe risk of
ac ollision with avehicle or apedestrian and
reduce the effects of such acollision .IfBAS
PLUS detects adanger of collision, you are
assisted when braking.
Importan tsafet ynotes G
WARNING
BASP LUS cannot always clearly identify
objects and complex traffic situations.
In such cases, BASP LUS may:
R interven eunnecessarily
R not intervene
There is arisk of an accident.
Always pay careful attention to the traffic sit- uation and be ready to brake. Terminate the
intervention in anon-critical drivin gsituation. G
WARNING
BASP LUS does not react:
R to small people, e.g. children
R to animals
R to oncoming vehicles
R when cornering
As aresult, BASP LUS may not interven einall
critical situations. There is arisk of an acci-
dent.
Always pay careful attention to the traffic sit- uation and be ready to brake.
In the event of snowfall or heavy rain, detec-
tion can be impaired.
Detection by the radar senso rsystem is also
impaired in the event of:
R dirt on the sensors or obscured sensors
R interferenc ebyother radar sources
R strong radar reflections, for example, in
multi-storey car parks R
an arro wvehicle travelling in front, e.g. a
motorcycle
R av ehicle travelling in fron tonadifferent
line
R vehicles quickly movin gintot he radar sen-
sor system detection range
Detection by the camera system is also
impaired in the event of:
R dirt on the camera or if the camera is cov-
ered
R glare on the camera system, e.g. from the
sun being low in the sky
R darkness
R if:
- pedestrians move quickly, e.g. int othe
path of the vehicle
- the camera system no longer detects a
pedestrian as aperson due to special
clothing or other objects
- ap edestrian is concealed by other
objects
- the typical outline of aperson is not dis-
tinguishable from the background
Following damage to the fron tend of the vehi-
cle, have the radar senso rsettings and oper-
ation checked at aqualified specialist work-
shop. This also applies to collisions at slow
speeds where ther eisnovisible damage to
the fron tofthe vehicle.
Following damage to the windscreen, have
the configuration and operation of the cam-
era system checked at aqualified specialist
workshop.
Function To avoid
acollision, BASP LUS calculates the
brake forc enecessary if:
R you approach an obstacle and
R BASP LUS has detected arisk of collision
When driving at aspeed under 30 km/h :if
you depress the brake pedal, BASP LUS is
activated. Braking assistance from BASP LUS
is carried out at the last possible moment. Driving safet
ysystems
79Safety Z
When driving at
aspee dabove 30 km/h :if
you depress the brake peda lsharply,B AS
PLUS automatically increases the brake pres- sure to adegre esuited to the traffic situation.
BAS PLUS provides braking assistance in haz- ardous situations with vehicles in front within
as pee drange between 7km/h and
250 km/h.
Up to aspee dofa pproximately 70 km/h, BAS
PLUS may react to:
R stationary objects in the path of yourv ehi-
cle, e.g. stoppe dorparked vehicles
R pedestrians in the path of yourv ehicle
R obstacles crossing yourp ath, which move
in the detection range of the sensors and
are recognised by them
i If BAS PLUS demands particularly high
braking force, preventative passenger pro-
tection measures (PRE-SAFE ®
)a re activa-
ted simultaneously.
X Keep the brake peda ldepressed until the
emergency braking situation is over.
ABS prevents the wheels from locking.
BAS PLUS is deactivated and the brakes func-
tion as usual, if:
R you release the brake pedal
R there is no longer arisk of collision
R no obstacl eisdetected in front of your
vehicle
R you depress the accelerator pedal
R you activate kickdown COLLISIONP
REVENTIONASSIST
PLUS
General notes COLLISION PREVENTIO
NASSIST PLUS con-
sists of adistance warning function with an
autonomous braking function and Adaptive
Brake Assist.
COLLISION PREVENTIO NASSIST PLUS can
help you to minimise the risk of acollision with the vehicl
einfront or reduce the effects
of such acollision.
If COLLISION PREVENTIO NASSIST PLUS
detects that there is arisk of acollision, you
willbew arned visuallya nd acoustically.Ify ou
do not react to the visual and audible collision warning, autonomous braking can be initiated
in critical situations. If you apply the brake
yourself in acritical situation, the COLLISION
PREVENTIO NASSIST PLUS Adaptive Brake
Assist assists you.
Switchin gthe soun don/off COLLISION PREVENTIO
NASSIST PLUS is
activated after every ignition cycle .You can
activate or deactivate COLLISION PREVEN-
TION ASSIST PLUS in the on-board computer
(Y page2 87). When deactivated, the dis-
tance warning function and the autonomous
braking function are alsod eactivated.
If COLLISION PREVENTIO NASSIST PLUS is
deactivated, the æsymbol appears in the
assistance graphics display.
Important safety notes In particular, the detection of obstacles can
be impaired in the case of:
R dirt on the sensors or obscured sensors
R snow or heavy rain
R interference by other rada rsources
R strong rada rreflections, for example, in
multi-storey car parks
R an arrow vehicl etravelling in front, e.g. a
motorcycle
R av ehicl etravelling in front on adifferent
line
R new vehicles or after aservice on the COL-
LISION PREVENTIO NASSIST PLUS system
Please observe the information in the sec-
tion on running-in the vehicle
(Y page1 78).
Following damage to the front end of the vehi-
cle, have the configuration and operation of
the rada rsensor checked at aqualified spe- 80
Driving safety systemsSafety
cialist workshop. Thi
salsoa pplies to colli-
sions at slo wspeeds where there is no visible
damag etothe front of the vehicle.
Distanc ewarnin gfunction General notes
The distance warning function can hel
pyou to
minimis ethe ris kofa collisio nwitht he vehi-
cle in front or reduce the effects of such a
collision. If the distance warning function
detects that there is ariskofa collision, you
will be warned visuall yand acoustically.
Important safety notes
i Observe the "Important safety notes" sec-
tion for driving safety systems (Y page 77).G
WARNING
The distance warning function doe snot react:
R to peopl eoranimals
R to oncoming vehicles
R to crossing traffic
R whe ncornering
Thus, the distance warning function cannot
provid eawarning in al lcritical situations.
There is ariskofana ccident.
Alway spaycareful attention to the traffic sit-
uation and be ready to brake. G
WARNING
The distance warning function cannot always
clearl yide ntif yobjects and comple xtraffic
situations.
In such cases, the distance warning function
may:
R giv eanu nnecessary warning
R not giv eawarning
There is ariskofana ccident.
Alway spaycareful attention to the traffic sit-
uation; do not rel yonthe distance warning
function alone. Function
The distance warning function issue
sawarn-
ing at speeds:
R of approximately 30 km/h or more ,if, over
several seconds, the distance maintained
to the vehicle travelling in front is insuffi-
cient. The ·distance warning lamp
then lights up in the instrument cluster.
R of approximately 7km/h or more ,ifyou
rapidly approach avehicle in front. An inter-
mittent warning tone will then sound and
the · distance warning lamp will light
up in the instrument cluster.
X Brake immediately in order to increas ethe
distance from the vehicle in front.
or
X Take evasiv eaction provided it is safe to do
so.
Due to the nature of the system, particularly
complicate dbutnon-critical driving condi-
tions may also cause the system to display a
warning.
With the hel pofthe radar sensor system, the
distance warning function can detect obsta-
cle sthat are in the path of your vehicle for an
extended period of time.
Up to aspeed of approximately 70 km/h ,the
distance warning function can also react to
stationary obstacles, such as stopped or
parked vehicles.
Autonomous braking function If the driver doe
snot react to the distance
warning signal in acritical situation, COLLI-
SION PREVENTIO NASSIST PLUS can assist
with the autonomous braking function.
The autonomous braking function:
R gives the driver more time to react to criti-
cal driving situations
R can hel pthe driver to avoid an accident or
R reduce sthe effects of an accident Drivin
gsafety systems
81Safety Z
The autonomous braking function is available
in the following speed ranges:
R from 7km/ htoa pprox. 105 km/hf or mov-
ing objects
R from 7km/ htoa pprox. 50 km/h for sta-
tionar yobjects
If the autonomou sbraking functio ndeman ds
particularl yhighb raking force, preventative
passenge rprotection measures (PRE-SAFE ®
)
ar ea ctivated simultaneously.
Adaptive Brake Assist i
Observe the "Important safety notes" sec-
tio n(Ypage 77).
Adaptive Brake Assist provide sbraking assis-
tanc einh azardous situations at speeds
above 7km/h .Itusesr adar senso rtechnol-
og ytoa ssessthe traffi csituation. G
WARNING
Adaptive Brake Assist cannot always clearly
identify objects and complex traffi csitua-
tions.
In such cases ,Adaptive Brake Assist can:
R intervene unnecessarily
R not intervene
There is ariskofana ccident.
Alway spaycarefu lattentio ntothe traffi csit-
uatio nand be ready to brake. Terminate the
interventio ninanon-critical driving situation. G
WARNING
Adaptive Brake Assist does not react:
R to people or animals
R to oncoming vehicles
R to crossing traffic
R when cornering
As aresult, the Adaptive Brake Assist ma ynot
intervene in al lcritica lconditions .The re is a
risk of an accident.
Alway spaycarefu lattentio ntothe traffi csit-
uatio nand be ready to brake. Due to the nature of the system, particularly
complicated bu
tnon-critical driving condi-
tions ma yalsoc ause Brake Assist to inter-
vene.
If Adaptive Brake Assist is not availabl edueto
am alfu nctio ninthe rada rsen sors ystem, the
brake syste mremains availabl ewithf ull
brake boosting effect and BAS.
With the help of Adaptive Brake Assist, the
distance warning signa lcan detect obstacles
tha tare in the path of your vehicl efor an
extende dperio doft ime.
If Adaptive Brake Assist detects ariskofc ol-
lision with the vehicl einfront, it calculates
the braking force necessary to avoi dacolli-
sion. If yo uapply the brakes forcefully ,Adap-
tiv eB rake Assist will automaticall yincrease
the braking force to alevel suitabl efor the
traffi cconditions.
X Kee pthe brake peda ldep resse duntilthe
emergency braking situatio niso ver.
ABS prevents the wheels fro mlocking.
Th eb rakes will work normally agai nif:
R yo ur elease the brake pedal
R there is no longe rany dange rofacollision
R no obstacle is detecte dinfront of your
vehicle
Adaptive Brake Assist is the ndeactivated.
If Adaptive Brake Assist demands particularly high braking force, preventativ epassenger
protection measures (PRE-SAFE ®
)a re activa-
ted simultaneously.
Up to aspeed of approximately 250 km/h,
Adaptive Brake Assist is capable of reacting
to moving objects tha thavea lready been
detecte dassuchatl east once ove rthe period
of observation.
Up to aspeed of approximately 70 km/h,
Adaptive Brake Assist reacts to stationary
obstacles. 82
Driving safet
ysystemsSafety
Adaptive brak
elamps
i Observ
ethe "Importan tsafet ynotes "sec-
tion (Y page 77).
The adaptive brak elights warn followin gtraf-
fic in an emergenc ybraking situation:
R by flashin gbrak elamps
R theh azard warning lamp sare activated
If you brak esharply from aspee dofm ore
than 50 km/h or if braking is assisted by BAS or BA SPLUS, th ebrak elamp sflas hrapidly. In
this way, traffic travellin gbehind you is
warned in an eve nmoren oticea ble manner.
If you brak esharply from aspee dofm ore
than 70 km/h to astandstill, th ehazard warn-
ing lamp sare activated automatically. If the
brakes are applie dagain ,the brak elamps
ligh tupc ontinuo usly. The hazard warning
lamp sswitch off automatically if you travel
faste rtha n1 0k m/ h.You can also switch off
th eh azard warning lamp susingthe hazard
warning butto n(Ypage 145). ESP
®
(Electronic Stabilit yProgram)
Genera lnotes i
Observ
ethe "Importan tsafet ynotes "sec-
tion (Y page 77).
ESP ®
monitors driving stabilit yand traction,
i.e .p ower transmission between th etyres
and th eroad surface.
If ESP ®
detects that th evehicl eisd eviating
from th edirection desired by th edriver, one
or mor ewheels are braked to stabilis ethe
vehicle. The engin eoutput is also modifie dto
keep th evehicl eont hedesired cours ewithin
physical limits .ESP ®
assist sthe driver when
pullin gaway on wet or slippery roads. ESP ®
can also stabilis ethe vehicl eduring braking.
ETS/4ET S(Electronic Traction System) ET
St raction control is part of ESP ®
.Onv ehi-
cle sw ith4 MATIC ,4ETSisa component of
ESP ®
. Traction control brakes th
edrivew heels indi-
vidually if they spin .This enables you to pull
away and accelerate on slippery surfaces, for exampl eiftheroad surfac eisslippery on one
side .Ina ddition ,mored rivet orque is trans-
ferred to th ewhee lorw heels wit htraction.
Traction control remain sactive if you deacti-
vat eE SP®
.
Important safety notes i
Observ
ethe "Importan tsafet ynotes "sec-
tion (Y page 77). G
WARNING
If ESP ®
is malfunctioning ,ESP ®
is unable to
stabilis ethe vehicle. In addition ,other driving
safet ysystems are switched off .This increa-
ses th eriskofs kiddin gand an accident.
Drive on carefully. Hav eESP®
checke data
qualified specialist workshop.
! Vehicles wit
h4MATIC :function or per-
formance test smay only be carrie dout on
a2 -axled ynamometer. Befor eoperating
th ev ehicl eons uchad ynamometer, please
consult aqualified specialist workshop.
You could otherwise damag ethe driv etrain
or th ebrak esystem.
Vehicles without 4MATIC: when towin gyour
vehicl ewitht he rear axl eraised, observ ethe
note sonE SP®
(Y page 410).
When ESP ®
is deactivated, the åESP®
OF Fw arning lamp lights up continuously.
If the ÷ warning lamp and the åwarn-
ing lamp are lit continuously, ESP ®
is not
available due to amalfunction.
Observ ethe information on warning lamps
(Y page 333) and display message swhich
may be shown in th einstrumen tcluster
(Y page 300).
i Only use wheels wit
hthe recommended
tyr es izes. Only then will ESP ®
function
properly. Driving safety systems
83Safety Z