MERCEDES-BENZ SLC ROADSTER 2018 Workshop Manual

passenger seat may not be used. Do not
installachild restraint system on the front-
passenger seat. Have the Occupant Classifi-
cation System (OCS) checked and repaired
immediately at aqualified specialist work-
shop.
GWARNING
Objects between the seat surface and the
child restraint system could affect OCS oper- ation. This could result in the front-passenger
air bag not functioning as intended during an
accident. This poses an increased risk of
injury or even fatal injury.
Do not place any objects between the seat
surface and the child restraint system. The
entire base of the child restraint system must
always rest on the seat cushion of the front-
passenger seat. The backrest of the forward-
facingc hild restraint system must, as far as
possible, be resting on the backrest of the
front-passenger seat. Always comply with the
child restraint system manufacturer's instal-
lation instructions.
After the system self-test, the PASSENGER AIR
BAGO FF or PASSENGER AIR BAGONi ndicator
lamp displays the status of the front-passenger
fronta ir bag (
Ypage 46). If the front-passenger
fronta ir bag is enabled, the PASSENGER AIR
BAGONi ndicator lamp lights up for 60 seconds
and then goes out.
If the PASSENGER AIR BAGONi ndicator lamp is
off, only the PASSENGER AIR BAGO FF indicator
lamp shows the status of the front-passenger
fronta ir bag. The PASSENGER AIR BAGO FF
indicator lamp may be lit continuously or be off.
For more information about the OCS, see "Prob-
lems with the Occupant Classification System"
(
Ypage 49).
Problems with the Occupant Classification System (OCS)
Be sure to observe the notes on "System self-test" (Ypage 48).
Occupant safety49
Safety
Z

ProblemPossible causes/consequences andMSolutions
The PASSENGER AIR
BAG OFF indicator lamp
lights up and remains lit,
even though the front-
passenger seat is occu-
pied by an adult oraper-
son of astature corre-
sponding to that of an
adult.The classification of the person on the front-passenger seat is incor-
rect.
XMake sure the conditionsf orac orrect classification of the person
on the front-passenger seat are met (Ypage 46).
XIf the PASSENGER AIR BAG OFF indicator lamp remains lit, the front-
passenger seat may not be used.
XHave OCS checked as soon as possible at an authorized Mercedes- Benz Center.
The PASSENGER AIR
BAG OFF indicator lamp
does not light up and/or
does not stay on.
The front-passenger seat
is:
Runoccupied
Roccupied by the
weight of achild up to
twelve months old in a
child restraint system
OCS is malfunctioning.
XMake sure there is nothin gbetween the seat cushion and the child
seat.
XMake sure that the entire base of the child restraint system rests on
the seat cushion of the front-passenger seat. The backrest of the
forward-facing child restraint system must lie as flat as possible
against the backrest of the front-passenger seat. If necessary,
adjust the position of the front-passenger seat.
XWhen installing the child restraint system, make sure that the seat belt is tight. Do not pull the seat belt tight using the front-passenger
seat adjustment .This could result in the seat belt and the child
restraint system being pulled too tightly.
XCheck for correct installation of the child restraint system.
Make sure that the head restraint does not apply aload to the child
restraint system. If necessary, adjust the head restraint accord-
ingly.
XMake sure that no object sare applying additional weight onto the
seat.
XIf the PASSENGER AIR BAG OFF indicator lamp remains off and/or
the PASSENGER AIR BAG ON indicator lamp lights up, do not install ac hild restraint system on the front-passenger seat.
XHave OCS checked as soon as possible at an authorized Mercedes-
Benz Center.
Deployment of Emergency Tensioning
Devices and air bags
Important safety notes
GWARNING
The air bag parts are hot after an air bag has
been deployed. There is arisk of injury.
Do not touch the air bag parts. Have a
deployeda ir bag replaced at aqualified spe-
cialist workshop as soon as possible.
GWARNING
Ad eployeda ir bag no longer offers any pro-
tection and cannot provide the intended pro-
tection in an accident. There is an increased
risk of injury.
Have the vehicle towed to aqualified special-
ist workshop in order to have adeployeda ir
bag replaced.
For your own safety and that of your front
passenger, it is important that you have
deployeda ir bags replaced and faulty air bags
repaired. This will help to make sure the air bags
50Occupant safety
Safety

continuetoperform theirp rotective function for
the vehicle occupants in the event of acrash.
GWARNING
Emergency Tensioning Devices that have
deployed pyrotechnicall yare no longer opera-
tiona land are unabletop erform theirinten-
ded protective function. Thisp oses an
increase driskofi njury or evenf atalinjury.
Have pyrotechnicall ytriggeredE mergency
Tensioning Devices replaced immediatel yata
qualified specialist workshop.
An electri cmotor is used by PRE-SAFE
®to trig-
ger the tightening of the seatb eltinh azardous
situations. Thisp rocedure is reversible.
If Emergency Tensioning Devices are triggered
or ai rbagsa re deployed, yo uwillh earab ang,
and some powder may also be released .The
6 restraint system warning lamp lights up.
Only in rar ecase swillt he bang affect your hear-
ing. The powder that is released generally does
not constitute ahealth hazard ,but it may cause
short-term breathing difficulties in peoplew ith
asthma or otherr espiratory problems. Provided
it is saf etodos o, youshoul dleave the vehicle
immediatel yoropenthe window in order to pre-
vent breathing difficulties.
Air bags and pyrotechnic Emergency Tensioning
Devices (ETDs) contai nperchlorate material,
which may require specia lhan dling and regard
for the environment. National guidelines must
be observedd uring disposal .InCalifornia, see
www.dtsc.ca.gov/HazardousWaste/
Perchlorate/index.cfm.
Metho dofoperation
During the firs tstag eofac ollision, the restraint
system control uni tevaluates important physi-
cal data relating to vehicle deceleration or accel-
eration, such as:
Rduration
Rdirection
Rintensity
Base dont he evaluation of this data, the
restraint system control uni ttriggers the Emer-
gency Tensioning Devices during afrontalo r
rearc ollision. An Emergency Tensioning Device can only be
triggered, if:
Rthe ignition is switched on
Rthe components of the restraint system are
operational
.You can find further information
under "Restraint system warning lamp"
(
Ypage 38)
Rthe seatb eltb uckle tongueh asengaged in
the bel tbuckle of the respectiv eseat
If the restraint system control uni tdetects a
more severe accident, further components of
the restraint system are activate dindepend-
ently of each otherinc ertain frontalcollision
situations:
RFront ai rbagsasw ellasd river'sa nd front-
passenger knee bags
The front-passenger front ai rbag is activate dor
deactivated depending on the person on the
front-passenger seat. The front-passenger front
ai rb ag can only deploy in an accident if the
PASSENGER AIR BAG OFF indicator lamp is off.
Observe the information on the PASSENGER AIR
BAG indicator lamps (
Ypage 39).
You rvehicle hast wo-stage front ai rbags. In the
firs tdeployment stage, the front ai rbag is filled
with propellant gas. The front ai rbag is fully
deployed with the maximum amount of prop
el-
lant gasifas econd deployment thresholdi s
reached within afew milliseconds.
The activation thresholdoft he Emergency Ten-
sioning Devices and the ai rbagsisd etermined
by evaluating the rate of vehicle deceleration or
acceleration which occurs at variousp oints in
the vehicle .Thisp rocess is pre-emptive in
nature. Deployment shoul dtake place in good
time at the star tofthe collision.
The rate of vehicle deceleration or acceleration
and the direction of the force are essentially
determine dby:
Rthe distribution of forcesd uring the collision
Rthe collision angle
Rthe deformation characteristics of the vehicle
Rthe characteristics of the object with which
the vehicle hasc ollided
Factor swhich can only be seena nd measured
afte rac ollision haso ccurred do not play adeci-
siv eroleint he deployment of an ai rbag.N or do
they provid eanindication of ai rbag deploy-
ment.
The vehicle can be deformedc onsiderably,with-
outana irbagb eing deployed. Thisist he case if
only parts which are relativelye asilyd eformed
Occupan tsafety51
Safety
Z

are affected and therateofd eceleratio nisnot
high.C onversely, air bags may be deployed even
though th evehicle suffers only minor deforma-
tion. This is th ecasei f, for example, ver yrigid
vehicle part ssuchasl ongitudinal body mem-
bers are hit,a nd sufficient deceleratio noccurs
as aresult.
If th erestraint system control unit detect saside
impac torift hevehicle roll sover, th eapplicable
component softherestraint system are
deployed independently of each other depend-
ing on th eapparent type of accident.
RSid eimpacta ir bag on th eside of impact,
independently of th eEme rgenc yTensioning
Devic eand th euse of th eseat belt on the
driver'ss eat
The side impac tair bag on th efront -
passenger side deploys unde rthe following
conditions:
-th eO CS system detect sthatthe front-
passenger seat is occupied or
-th es eat belt buckle tongue is engaged in
th eb elt buckle of th efront-pa ssenger seat
RHead bag on th eside of impact, independ-
ently of th euse of th eseat belt and inde-
pendently of whether th efront-pa ssenger
seat is occupied
REmergenc yTensioning Devices, if th esystem
determine sthatd eploymen tcan offer addi-
tional protection in this situation
RHead bags on th edriver'sa nd front-
passenger side in certain situations when the
vehicle roll sover, if t
h
esystem determines
that deploymen tcan offer additional protec-
tio ntot hatp rovided by th eseat belt
iNot all air bags are deployed in an accident.
The differenta ir bag systems work independ-
ently of each other.
How th eair bag system worksisd etermined
by th eseverityoft heaccidentd etected,
especially th evehicle deceleratio noraccel-
eration and th eapparent type of accident:
RFrontal collision
RSid eimpact
RRollover
NECK-PROh eadr estraints
Important safety notes
GWARNING
The function of th ehead restraint may be
impaired if you:
Rattach object ssuchasc oat hangerstot he
head restraints, for example
Ruse head restraint covers
If you do so, th ehead restraint scanno tfulfill
their intended protective function in th eevent
of an accident. In addition,o bjectsattached
to th ehead restraint scoul de ndanger other
vehicle occupants. Thereisani ncreased risk
of injury.
Do no tattach any object stothehead
restraint sand do no tuse head restraint cov-
ers.
Method of operation
NECK-PRO head restraint sreduc ethe likelihood
of head and chest injuries.T he NECK-PRO head
restraint sonthedriver'sa nd front-passenger
seatsa re moved forwards and upwards in the
eventofar ear-endcollision of acertain severity.
This provides bette rhead support.
If th eNECK-PRO head restraint shave been trig-
gered in an accident, you must reset th eNECK-
PRO head restraint sonthedriver’s and front-
passenger seat (
Ypage 53) .Otherwise, the
additional protection will no tbeavailabl einthe
eventofa nother rear-en dcollision.Y ou can rec-
ognize when NECK-PRO head restraint shave
been triggered by th efacttha tthe yh ave moved
forwards and can no longer be adjusted.
Mercedes-Ben zrecommend sthaty ou have the
NECK-PRO head restraint schecked for func-
tionalit yataq ualified specialist workshop after
ar ear-en dcollision.
52Occupant safety
Safety

Resetting triggeredNECK-PRO head
restraints
Do not insert your finger between the upholstery of the headr estraint and the seat. Payp articular
attention whil eresetting the NECK-PROh ead
restraints.
XTilt the top of the NECK-PROh eadrestraint
cushio nforward sinthe direction of arrow :.
XPush the NECK-PROh eadrestraint cushion
dow nasfar as it will go in the direction of
arrow ;.
XFirmly push the NECK-PROh eadrestraint
cushio nbackint he direction of arrow =until
the cushio nengages.
XRepea tthis procedure for the second NECK-
PROh eadrestraint.
iResetting the NECK-PROh eadrestraints
requires alot of strength. If yo uhaved ifficulty
resetting the NECK-PROh eadrestraints, have
this work carrie doutataq uali fied specialist
workshop.
PRE-SAFE®(anticipatory occupant
protection system)
PRE-SAFE®informs yo uofcertain critical driving
situations and take spre-emptive measures to
protect the vehicl eoccupants.
PRE-SAFE
®can take the following measures
independentl yofeacho ther:
Rpre-tensioning the driver'sa nd front-
passenger seatbelt.
Rclosing the sid ewindows.
Rvehicles with amemory function: setting a
more favorabl eseatp osition for the front-
passenger seat.
!Make sure that there are no objects in the
footwell or behind the seats. There is adanger
that the seats and/or objects could be dam-
aged when PRE-SAFE
®is activated.
Should an accident not occur, the preventative
measures take nare reversed. Certai nsettings
mus tbem adey ourself.
XIf the seatb eltp re-tensioning is not reduced,
move the seatb ackrest back slightly.
Seatb eltp re-tensioning is released.
Automatic measures after an acci-
dent
Immediately afte ranaccident, the following
measures are implemented, depending on the
typ eand severity of the impact:
Rthe hazard warning lamps are switched on
Rthe emergency lighting is activated
Rthe vehicl edoors are unlocked
Rthe front sid ewindow sare lowered
Rvehicles with amemory function: the electri-
cally adjustabl esteering wheel is raised when
the driver'sd ooriso pened
Rthe engine is switched off and the fue lsuppl y
is switched off
Rvehicles with mbrace: automatic emergency
call
Childrenint he vehicle
Important safety notes
Ifac hild younger than twelve years olda nd
under 5ft(1.50 m) in height is traveling in the
vehicle:
Ralways secur ethe child in achild restraint
systems uitabl efor Mercedes-Benz vehicles.
The child restraint systemm ustbea ppropri-
ate to the age, weight and size of the child.
Rbe sure to observe the instructions and safety
notesint hissectio nina dditiontot he child
restraint systemm anufacturer's installation
instructions.
Ralways observe the instructions and safety
notesont he "Occupant classification system
(OCS)". (
Ypage 45)
Children in the vehicle53
Safety
Z

GWARNING
If you leave children unsupervised in the vehi-
cle, they coul dset it in motion by, for example:
Rrelease the parking brake.
Rshift the automatic transmission out of the
parking position P.
Rstart the engine.
In addition, they may operate vehiclee quip-
ment and become trapped. There is arisk of
an accident and injury.
When leaving the vehicle, alway stake the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle.
GWARNING
If persons, particularl ychildren are subjected
to prolonged exposure to extreme heato r
cold, there is arisk of injury ,possibly even
fatal .Never leave children unattended in the
vehicle.
GWARNING
If the child restraint system is subjected to
direct sunlight, parts may get very hot. Chil-
dren may burn themselves on these parts,
particularl yonthe metal parts of the child
restraint system. There is arisk of injury.
If you leave the vehicle, taking the child with
you ,alway sensure that the child restraint
system is not exposedtod irect sunlight. Pro-
tect it with ablanket, for example. If the child
restraint system has been exposedtod irect
sunlight, let it cool downb efore securing the
child in it. Never leave children unattended in
the vehicle.
Always ensure that all vehicleo ccupants have
their seat belts fastened correctly and are sitting
properly.P articular attention must be paidt o
children.
Observe the safety notes on the seat belt
(
Ypage4 0) and the notes on correct use of seat
belts (Ypage4 1).
Ab ooster seat may be necessary to achieve
propers eat beltp ositioning for children over
40 lbs (18 kg )until they reach aheight where a three-point seat beltc
an be properly fastened
without abooster seat.
Special seatbelt retractor
GWARNING
If the seat beltisr eleased while driving, the
child restraint system wil lnolonger be
secure dproperly.T he special seat beltr etrac-
tor is disableda nd the inertia real draw sina
portion of the seat belt. The seat beltc annot
be immediatel yrefastened. There is an
increased risk of injury,p ossibly even fatal.
Stop the vehiclei mmediately, paying atten-
tion to road and traffic conditions. Reactivate
the special seat beltr etractor and secure the
child restraint system properly.
The seat beltont he front-passenger's side is
equipped with aspecial seat beltr etractor.
When activated, the special seat beltr etractor
ensure sthat the seat beltc annot slacken once
the child seat is secured.
Installing achild restraint system:
XMake sure you observe the child restraint
system manufacturer's installation instruc-
tions.
XPul lthe seat belts moothly out of the belt
loop.
XEngage seat beltt ongue in beltbuckle.
Activating the special seat beltr etractor:
XPullthe seat belto ut fullyand let the inertia
reel retract it again.
Whilet he seat beltisr etracting, you should
hear aratcheting sound .The special seat belt
retractor is enabled.
XPush the child restraint system downsot hat
the seat beltist ight and does not loosen.
Removing the child restraint system and deac-
tivating the special seat beltr etractor:
XMake sure you observe the child restraint
system manufacturer's installation instruc-
tions.
XPress the release button of the seat belt
buckle,hold the beltt ongue and guide it back
toward sthe beltl oop.
The special seat beltr etractor is deactivated.
54Children in the vehicle
Safety

Child restraint system
The use of seat beltsand child restraint systems
is required by law in:
Rall 50 states
Rth eU .S.t erri tories
RtheD istrict of Columbia
Rall Canadian provinces
You can obtain further informatio nabout the
correc tchild restraint system from any author-
ize dM ercedes-Ben zCenter.
GWARNING
If th echild restraint system is installed incor-
rectly on asuitable seat,itc annotprotect as
intended. The child canno tthe nber estrained
in th eevent of an accident, heavyb raking or
suddenc hanges of direction.T hereisan
increased ris kofinjury, possibly eve nfatal.
Makes ure that you observ ethe child restraint
system manufacturer'si nstallationinstruc-
tions and th enotes on use. Pleasee nsure,
that th ebase of th echild restraint system is
always restin gcompletely on th eseat cush-
ion.N ever placeo bjects, e.g.cushions, under
or behindt hechild restraint system. Only use
child restraint systems witht heoriginal cover
designe dfor them. Only replace damaged
covers withg enuine covers.
GWARNING
If th echild restraint system is installed incor-
rectly or is no tsecured, it can com eloosei n
th ee vent of an accident, heavyb raking or a
suddenc hang eind irection.T he child
restraint system coul dbethrown about,s trik-
ing vehicle occupants .Thereisani ncreased
ris kofi njury, possibly eve nfatal.
Always install child restraint systems prop-
erly, eve niftheya re no tbeingu sed. Make
sure that you observ ethe child restraint sys-
te mm anufacturer'si nstallationinstructions.
Further informatio nonstowingo bjects, luggage
and loads securely can be foun dunde r“Stowi ng
options/stowage compartments”
(
Ypage 219).
GWARNING
Child restraint systems or their securin gsys-
tems whichh ave been damaged or subjected
to aload in an accidentc an no longer protect
as intended. The child canno tthe nb e
restraine dintheevent of an accident, heavy
braking or suddenc hanges of direction.T here
is an increased ris kofinjury, possibly even
fatal.
Replacec hild restraint systems whichh ave
been damaged or subjected to aload in an
accidentass oon as possible. Hav ethe secur-
ing systems on th echild restraint system
checked at aqualified specialist workshop,
before you install achild restraint system
again.
The securin gsystem of child restraint systems is
th es eat belt system.
iIf you install achild restraint system on the
front-passenger seat,bes ure to observethe
instructionsa nd safety note sonthe"Occu-
pantC lassificatio nSyste m(OCS)"
(
Ypage 45). Therey ou will also findinforma-
tio nond eactivatin gthe front-passenger front
air bag.
All child restraint systems must mee tthe fol-
lowings tandards:
RU.S. Federal Motor Vehicle SafetyS tandards
21 3a nd 225
RCanadian Motor Vehicle SafetyS tandards
21 3a nd 210.2
Confirmation that th echild restraint system cor-
responds to th estandards can be foun donan
instruction label on th echild restraint system.
This confir mation c
an also be foun
dintheinstal-
lation instructionst hata re included witht he
child restraint system.
Observ ethe warning labels in th evehicle inte-
rior and on th echild restraint system.
Child restraint system on th efront-
passengers eat
General notes
If you install achild restraint system on the
front-passenger seat,a lways observethe
Children in th evehicle55
Safety
Z

instructions and safetynotes on the "Occupant
Classification System (OCS)" (Ypage 45).
You can thus avoid the riskst hat could arise as
ar esult of:
Ran incorrectly categorized personint he front-
passenger seat
Rthe unintentional deactivatio nofthe front-
passenger front air bag
Rthe unsuitable positionin gofthe child
restraint system, e.g. too clos etothe dash-
board
Rearward-facing child restraint system
If it is absolutely necessary to install arearward-
facin gchild restraint system on the front-
passenger seat, always make sure that the
front-passenge rfront air bag is deactivated.
Only if the PASSENGER AI RBAG OFF indicator
lamp is permanently lit (
Ypage 39) is the front-
passenger front air bag deactivated.
Always observe the child restraint system man-
ufacturer'si nstallation and operating instruc-
tions.
Forward-facing child restraint system
If you secur eachild in aforward-facin gchild
restraint system on the front-passenge rseat,
always move the front-passenge rseat as far
back as possible.T he entire base of the child
restraint system must always rest on the seat
cushio nofthe front-passenge rseat. The back-
rest of the child restraint system must lie as flat
as possible against the backrest of the front-
passenger seat. The child restraint system must
not touc hthe roof or be subjected to aload by
the head restraint .Adjust the angle of the seat
backrest and the head restraint position accord- ingly. Always make sure that the shoulder belt
strap is correctly routed fromt he front-
passenger seat belt guide to the shoulder belt
guide on the child restraint system. The shoul-
der belt strap must be routed forward and down
fromt he front-passenge rseat belt guide.
Always observe the child restraint system man-
ufacturer'si nstallation and operating instruc-
tions.
Pets in th evehicle
GWARNING
If you leave animals unattended or unsecured
in the vehicle, the ycould press buttons or
switches, for example.
As aresult,t heyc ould:
Ractivatev ehicle equipmenta nd become
trapped, for example
Ractivateord eactivatesystems, thereby
endangeringo ther road users
Unsecure danimals could also be flung around
the vehicle in the eventofana ccident or sud-
den steeringorb raking, thereby injuring vehi-
cle occupants. There is arisk of an accident
and injury.
Never leave animals unattended in the vehi-
cle. Always secur eanimals properly during
the journey, e.g. use asuitable animal trans-
port box.
Driving safety systems
Overview of driving safety systems
In this section, you will findi nformation about
the followingd rivingsafetysystems:
RABS(Anti-lock Braking System)
(Ypage 57)
RBA S(Brake Assist System) (Ypage 57)
RActiveBrakeA ssist (Ypage 58)
RAdaptive brakel ights(Ypage 60)
RESP®(ElectronicStabilityProgram)
(Ypage 60)
REB D( Electronic Bra ke force Distribution)
(Ypage 63)
RADAPTIVE BRAKE (Ypage 63)
Important safety notes
If you fail to adapt your drivings tyle or if you are
inattentive, the drivings afetysystems can nei-
the rreducet he risk of an accident nor override
the laws of physics .Drivings afetys ystems are
merely aids designed to assist driving.
56Driving safety systems
Safety

You are responsible for maintainingthe distance
to the vehicle in front, for vehicle speed, for
braking in good time, and for stayin ginlane.
Always adapt your drivings tyle to suit the pre-
vailing road and weather condition sand main-
tain asafe distance from the vehicle in front.
Drive carefully.
The drivings afetysystems described only work
as effectively as possible when there is ade-
quate contac tbetwee nthe tires and the road
surface. Pay particular attention to the informa-
tion regarding tires, recommended minimum
tir et read depth setc.int he "Wheels and tires"
section (
Ypage 260).
In wintry drivingc onditions, always use winter
tires (M+S tires) and if necessary, sno wchains.
Only in this way will the drivings afetysystems
described in this section work as effectively as
possible.
ABS (Anti-lock Braking System)
Genera linformation
AB Sregulates brakep ressure in suchaway that
the wheels do not lock when you brake. This
allows you to continue steeringt he vehicle when
braking.
The ! ABSw arnin glamp in the instrument
cluster lightsupw hen the ignition is switched
on. It goes out when the engin eisrunning.
AB Sw orksf romaspeed of about 5mph
(8 km/h), regardless of road-surfacec onditions.
AB Sw orksons lippery surfaces, even when you
only brakeg ently.
Important safetyn otes
iObserve the "Importan tsafetyn otes" sec-
tion (Ypage 56).
GWARNING
If AB Sism alfunctioning, the wheels could
lock when braking. The steerabilitya nd brak-
ing characteristics would be severely affec-
ted. There is an increased danger of skidding and accidents.
Drive on carefully. Have AB Schecked imme-
diately at aqualified specialis tworkshop.
When AB Sismalfunctioning, other systems,
including drivings afetysystems, will also becom
einoperative .Observe the information
on the AB Swarnin glamp (
Ypage 204) and dis-
play messages which may be shown in the
instrumentc luster (
Ypage 179).
Brakes
XIf ABS intervenes: continue to depresst he
brakep edal vigorously until the braking sit-
uation is over.
XTo make afull brake application: depress
the brakep edal with full force.
If AB Sintervenes when braking, you will feel a
pulsing in the brakep edal.
The pulsatin gbrakep edal can be an indication
of hazardous road conditions, and function sasa
reminder to tak eextra care while driving.
BAS (Brake Assist System)
Genera linformation
BA So perates in emergenc ybraking situations.
If you depresst he brakepedal quickly, BAS
automatically boostst he braking force, thus
shortening the stopping distance.
Important safetyn otes
iObserve the "Importan tsafetyn otes" sec-
tion (Ypage 56).
GWARNING
If BA Sism alfunctioning, the braking distance
in an emergenc ybraking situation is
increased. There is arisk of an accident.
In an emergenc ybraking situation, depress
the brakep edal with full force. AB Sprevents
the wheels from locking.
Braking
XKeep the brakep edal firmly depressed until
the emergenc ybraking situation is over.
AB Sp revent sthe wheels from locking.
The brakes will function as usual onc eyou
release the brakep edal. BASisdeactivated.
Driving safetys ystems57
Safety
Z

Active BrakeAssist
Gene ralinform ation
iObserv ethe "Importan tsafet ynotes "sec-
tion (Ypage 56).
Active Brake Assis tconsists ofad istanc ewarn-
ing function wit hanautonomous braking func-
tion and Adaptive Brake Assist.
Active Brake Assis tcan help you to minimiz ethe
ris kofac ollision wit hthe vehicl einfrontor
reduce th eeffects of suc hacollision .
If Active Brake Assis tdetects that there is arisk
of collision ,you will be warned visually and
acoustically. If you do no treac ttot hevisual and
audible collision warning ,autonomous braking
can be initiate dincritical situations. If you apply
th eb rak eyourself in acritical situation ,Adap-
tive Brake Assis toftheActive Brake Assis tsys-
te ms upport syou.
Import ant safety notes
In particular, th edetection of obstacles can be
impaire dif:
Rthere is dir tonthesensor soranythin gelse
covering th esensor s
Rthere is snow or heav yrain
Rthere is interferenc ebyother radar source s
Rthere are strongradar reflections, for exam-
ple in parking garages
Ran arrow vehicl eistraveling in front, e.g. a
motorbik e
Ravehicl eistraveling in fron tonadifferentlin e
Ryou are drivin ganewvehicl eorservicing on
th eA ctiv eBrake Assis tsystem has jus tbeen
carrie dout
Observ ethe important safet ynotes in the
"Breaking-in notes" section (
Ypage 115).
Followin gdamag etothefron tend of th evehicle,
hav ethe configuration and operation of th e
radar sensor checke dataqualified specialis t
workshop .This also applie stocollision satslow
speeds wher ethere is no visible damag etothe
fron toft hevehicle.
Activating/deactivating
Active Brake Assis tisautomatically active after
switching on th eignition .
You can activat eordeactivat eActiv eBrake
Assis tusin gthe on-board computer (
Ypage 171). When deactivated, th
edistanc e
warning function and th eautonomous braking
function are also deactivated.
If Active Brake Assis tisdeactivated, th eæ
symbol appear sintheassistanc egraphic dis-
play.
Distance warning function
Genera linformation
The distanc ewarning function can help you to
minimiz ethe riskofaf ront-end collision wit ha
vehicl eahead or reduce th eeffects of suc ha
collision .Ifthedistanc ewarning function
detects that there is ariskofac ollision ,you will
be warned visually and acoustically.
Important safety notes
iObserv ethe "Importan tsafet ynotes "sec-
tion for drivin gsafet ysystems (Ypage 56) .
GWARNIN G
The distanc ewarning function does no treact:
Rto people or animals
Rto oncomin gvehicles
Rto crossing traffic
Rwhen cornering
The distanc ewarning function may no tgive
warning sinall critical situations. There is a
ris kofana ccident.
Always pay careful attention to th etraffic sit -
uation and be read ytob rake.
Always adapt your spee dtosuit theprevailing
road and traffic conditions.
GWARNIN G
The distanc ewarning function canno talways
clearly identify objects and comple xtraffic
situations.
In suc hcases, th edistanc ewarning function
may:
Rgiv eanu nnecessary warning
Rnotg iveaw arning
There is ariskofana ccident.
Always pay careful attention to th etraffic sit -
uation and do no trelys olely on th edistanc e
warning function .
58Driving safety systems
Safety