2019 MERCEDES-BENZ CLA COUPE ABS

Dri
vin gsa fet ysys tems Over
view ofdrivin gsa fet ysys tems
In this sec tion ,you willfindinfo rm ation about
th efo llow ing dri vin gsaf etysys tems :
R AB S(An ti-loc kBrak ing Syst em)
(Y page 61)
R BA S(Brak eAss istSyst em) (Ypage 61)
R Ac tive Brak eAs sis t(Y page 62)
R ES P®
(E lec tron icStabili tyProgr am)
(Y page 64)
R EB D(Elect ronicBrak efo rc eDist ribution )
(Y page 67)
R AD APTIV EBRA KE(Ypage 68)
R ST EERCON TROL (Ypage 68) Im
por tant safet ynot es
If you failtoadapt yourdrivin gst yle orifyou are
in at te nt ive ,th edri vin gsaf etysys tems can nei-
th er red uce theris kof an acc iden tno rov err ide
th elaws ofphys ics. Dr iving safetysys tems are
mer elyaids designed toass istdrivin g.
You arerespon sibleformain tainingth edis tanc e
to theveh icle in fron t,forveh icle spe ed, for
bra king ingoo dtime, andforst ayin gin lan e.
Al ways adapt yourdrivin gst yle tosuit thepre -
vail ing ro ad and weat hercond ition sand main -
ta in asaf edis tanc efrom theveh icle in fron t.
Dr ive carefully.
The drivin gsaf etysys tems described onlywor k
as effect ive lyas pos siblewhen there isade-
quat eco ntact between thetires and thero ad
sur face.Plea sepay special atte nt ion tothe
no teson tires ,rec ommen dedminimum tire
tr ead dept hs,etc. (Y page 291).
In win try dri vin gco nd ition s,always usewinter
ti res (M+ Stires )and ifnece ssary,snow chains.
Onl yin thi swa ywi llthe driving safety system s
de scri bedin thi ssecti onworkas effe ctive lyas
po ssi ble. ABS
(Anti -lock Brakin gSys tem)
Gen eral informati on ABS
regulate sbra kepre ssu reinsu ch awa ytha t
the wheelsdo not lock when youbra ke. This
al lo ws youto conti nuestee ringthevehiclewh en
bra king . The
0025 ABSwarning lamp inthe instrum ent
clu ster lights upwhen the igniti onissw itch ed
on. Itgoe sou twh en the engi neisrunning .
ABS works from aspe edofabou t5 mph
(8 km/h ),reg ard less ofroa d-su rface cond itions.
ABS works onslip pe rysurfa ces, evenwh en you
onl ybra kegentl y.
Impo rtant safetynotes i
Obs
erve the"Impo rtant safety notes "sec-
tio n(Y page 61). G
WAR
NING
If ABS isma lfunctio ning,the wheelscou ld
lo ck when bra king .The stee rability and brak-
ing characteri stic swo uld be sev erelyaff ec-
ted .The reisan incre ased danger ofski dding
and accidents.
Driv eon car efully. Hav eABS checked imme-
di ate lyat aqu alifi ed spe cialist wo rksh op.
Whe nABS isma lfunctio ning,othe rsy stem s,
incl uding driving safety system s,willal so
be come inoperati ve. Obs erve theinforma tion
on the ABS warning lamp (Ypage 222 )and dis-
pl ay mes sages which maybe sho wninthe
ins trum entcluster (Ypage 194 ).
Brakin g X
IfABS interv enes:conti nuetodepre ssthe
bra kepedalvig oro uslyunti lthe braking sit-
ua tio nis ove r.
X To make aful lbrake application:de pre ss
the brakepedalwi th fullforce .
If ABS intervene swh en bra king ,yo uwi llfee la
pu lsing inthe brakepedal.
The pulsati ng bra kepedalcan beanind ication
of ha zard ousroa dcond itions, andfunc tions asa
rem inderto take extra carewh ile dri ving . BAS
(Brak eAs sist Sys tem)
Gen eral informati on BAS
opera tes ineme rgency braking situa tions.
If yo ude pre ssthe brakepedalqu ickl y,BAS
au toma tically bo osts thebraking force ,thu s
sho rteni ngthe stop ping dista nce. Dri
ving safe tysys tems
61Safety Z

Situ
ation-de pendentbraking assis tance iscap a-
bl e of rea cting tomovi ngobje ctsthat have
al rea dybee ndete cted assuch atleas tonce
ove rthe period of obs erva tion, uptoveh icle
spe eds ofaro und 155 mph (250 km/h ).
Situ ation-de pendentbraking assis tance can
al so dete ctstati onaryobje cts,uptoveh icle
spe eds ofaro und 44mph (70km/h ).
X Kee pthe brakeped aldep ress edunti lthe
eme rgency braking situation isove r.
ABS prevents thewheel sfrom locking.
The brakes willwo rknorma lly ag ain if:
R yourel ease the brakeped al
R there isno longer anydanger ofacol lisio n
R no obs tacl eis dete cted infront ofyour veh icle
Situ ation-de pendentbraking assis tance isthen
dea ctiva ted.
Impo rtant safetynotes
i Obs
erve the"Important safety notes "sec-
tion fordriving safety systems (Ypage 61). G
WARNI
NG
Active BrakeAssistdoe snot react:
R to per sons ,bi cycl es,motor cyclesorani -
mal s
R to appro ach ing vehicles
R to cross traffic
R on bend s
As ares ult, Active BrakeAssistcanno tinter -
vene inallcriti calsitu ations. Thereisaris kof
an acci dent.
Alw ayspa ycare fulattenti ontothe traff icsit-
ua tion andbepre pared tobra ke. G
WARNI
NG
Ada ptiveBrake Assistcanno tal wa yscle arly
id entif yobje ctsand comp lextraff icsitu a-
tions .
In such cas es, Ada ptiveBrake Assistmig ht:
R inter vene unnecessarily
R not inter vene
The reisaris kof an acci dent.
Alw ayspa ycare fulattenti ontothe traff icsit-
ua tion andberea dytobra ke. Termina tethe
inter venti oninanon-cri ticaldri ving situation. Due
tothe natu reofthe system, complexbu t
non-cri ticaldri ving condi tions mayalso cau se
Active BrakeAssistto inter vene .
Even ifActive BrakeAssistisnot availab ledu eto
a mal functi oninthe radarsens orsystem, the
bra kesystem isstil lava ilab lewith fullbra ke
boo sting effectand BAS. ES
P®
(E lectro nicStabi lity Prog ram)
Gen eral notes i
Obs
erve the"Important safety notes "sec-
tion (Ypage 61).
ESP ®
moni torsdriving stability and tracti on,i.e.
pow ertrans missionbetw eenthetiresand the
roa dsu rfa ce.
If ESP ®
dete ctsthat thevehicleis dev iating from
the directi ondes iredby the driver, one ormore
wh eel sare braked tostab ilize the vehicle. The
engi neoutpu tis also mod ified tokeep thevehi-
cle onthe desiredcou rse within physica llimits .
ESP ®
as sis tsthe driver when pulling away on
we tor slippe ryroa ds. ESP ®
can also stab ilize
the vehicledu ring braking.
ETS /4ETS (Electro nicTracti onSys tem) i
Obs
erve the"Important safety notes "sec-
tion (Ypage 61).
ETS tracti oncontrol ispa rtof ESP ®
.On veh icles
wi th 4MATI C,4ETS ispa rtof ESP ®
.
Tra ction control brakes thedrive wheel sind i-
vid ually if they spin.Thi sena bles youto pull
aw ay and acce lerate onslippe rysurfa ces, for
exa mpl eif the roadsu rfa ce isslippe ryon one
sid e.In addition, more drive torqu eis trans fer-
red tothe wheel orwh eel swi th tracti on.
Tra ction control remainsacti ve,evenif yo u
dea ctiva teESP ®
.
Impo rtant safetynotes i
Obs
erve the"Important safety notes "sec-
tion (Ypage 61). G
WARNI
NG
If ESP ®
is mal functi oning,ESP ®
is una ble to
stab ilize the vehicle. Addi tiona lly, fur ther driv-
ing safety systems aredeactiva ted.This
incre ases the riskof skid ding and anacci dent. 64
Dri
vin gsafe tysys temsSafe ty

Smar
tKeybattery
Import antsafety notes G
WARNING
Batt eries containtoxic andcorrosive substan-
ces. Ifbatteries areswallow ed,itcan result in
severe healthproblems. Thereisarisk offatal
injury.
Keep batteries outofthe reach ofchildren. If
a battery isswallow ed,seek medical attention
immediately.
The SmartK eybatteries containperchlorate
material, whichmayrequire specialhandling
and regard forthe environm ent.National guide-
lines must beobserved duringdisposal. InCal-
ifornia, seewww .dtsc.ca.gov/
Haza rdousWa <00560057004800120033004800550046004B004F005200550044005700480012
004C005100470048005B0011004600490050>.
Mercedes-B enzrecommen dsthat youhave the
battery replaced ataquali fiedspecialist work-
shop.
Checking thebatt ery X
Press the0037 or0036 button.
The battery isworking properly ifbattery
check lamp0043lights upbriefly.
The battery isdischarged ifbattery check
lamp 0043does notlight upbriefly.
X Change thebattery (Ypage 73).
i Ifthe SmartK eybattery ischeck edwithin
the signal reception rangeofthe vehicle,
pressing the0037 or0036 button:
R locks or
R unlocks thevehicle
i You
cangetabattery atany quali fiedspe-
cialist workshop. Replacing
thebatt ery You
require aCR 2025 3V cell battery.
X Take themechanical keyoutofthe SmartK ey
(Y page 72). X
Press mechanical key0044into theopening in
the SmartK eyinthe direction ofthe arrow
until battery traycover 0043opens. Whendoing
so, donot hold cover 0043shut.
X Remove batterytraycover 0043. X
Repeatedly tapthe SmartK eyagainst your
palm untilbattery 0087falls out.
X Insert thenew battery withthepositive ter-
minal facing upwards.Use alint-f reecloth to
do so.
X Make surethatthesurface ofthe battery is
free oflint, grease andother contaminants.
X Insert thefront tabsofbattery traycover 0043
and then press toclose it.
X Insert mechanical keyinto theSmartK ey
(Y page 72).
X Check thefunct ionofall SmartK eybuttons on
the vehicle. Smar
tKey
73Opening andclosing Z

in
green (Ypage 187). LaneKeepin gAss istis
ready foruse.
If Stan dard Stan
dard isselec ted,nowarnin gvibrat ion
occ urs if:
R you have switchedonthe turn signal.Inthis
even t,the warnin gsare suppres sedforacer -
tain period oftim e.
R adrivin gsafet ysyst eminterve nes,e.g. ABS,
BA Sor ESP®
.
When Adaptive Adap
tive isselec ted,nowarnin gvibra-
tion occurs if:
R you have switchedonthe turn signal.Inthis
even t,the warnin gsare suppres sedforacer -
tain period oftim e.
R adrivin gsafet ysyst eminterve nes,e.g. ABS,
BA Sor ESP®
.
R you accelerat ehard, e.g.kickdown .
R you brak ehard.
R you steeract ively, e.g.swerv eto avoid an
obst acle orchan gelanes quickly.
R you cutthe corner onasharp bend.
In order thatyouarewarne donly when neces-
sary andingood timeif you crossthe lane mark -
ing, thesyst emdete ctscer tain condition sand
warns youaccordin gly.
The warnin gvibrat ionoccurs earlier if:
R you approac hthe outer lanemark ingona
bend
R the road hasvery wide lanes, e.g.afree way
R the syst emdete ctssolid lanemark ings
The warnin gvibrat ionoccurs later if:
R the road hasnarrowlanes.
R you cutthe corner onabend Driving
systems
177Driving andparking Z

Safety
systems Display
messages Possible
causes/co nsequences and0050 0050
Solutions 002500E5
Currently Unavaila‐ Currently
Unavaila‐
ble SeeOperator's ble
SeeOperator's
Manual Manual ABS
(Anti- lockBraking System), BAS(Brake Assist), ESP®
(Electronic
Stability Program), theHOLD function andhillstart assist aretempo-
rarily unavail able.
Act ive Brake Assist mayhave alsofailed .
In addition, the0025, 00E5and00BB warning lampsmaylight upin
the instrument cluster.
ATTENTION ASSISTisdeactivated.
Possible causesare:
R Self-diagnosis isnot yetcomplete
R The on-board voltagemaybeinsufficient
G WARNING
The brake system continues tofunction normally, butwithout the
functions listedabove. Thewheels couldtherefore lockifyou brake
hard, forexample.
The steerabili tyand braking characteristics maybeseverely affected.
The braking distance inan emergency brakingsituation canincrease.
If ESP ®
is not operational, ESP®
is unable tostabilize thevehicle.
There isan increased riskofskidding andanaccident.
X Carefu llydrive onasuitabl estretc hof road, making gentlesteering
movements atspeeds ofabove 12mph (20km/h).
If the displa ymessage disappears,thefunctions mentioned above
are avail able again.
If the multifunction displaystill shows thedispla ymessage:
X Drive oncarefully .
X Visit aqual ified speciali stworkshop immediately . 002500E5
Inoperative See Inoperative
See
Operator's Manual Operator's
Manual ABS,
BAS,ESP®
,the HOLD function andhillstart assist arenot avail -
able duetoamalfunction.
Act ive Brake Assist mayhave alsofailed .
The 0025, 00E5,00BBand0027 (USAonly)or004D (Canad aonly)
warning lampsinthe instrument clustermayalsolight up.
ATTENTION ASSISTisdeactivated.
G WARNING
The brake system continues tofunction normally, butwithout the
functions listedabove. Thewheels couldtherefore lockifyou brake
hard, forexample.
The steerabili tyand braking characteristics maybeseverely affected.
The braking distance inan emergency brakingsituation canincrease.
If ESP ®
is not operational, ESP®
is unable tostabilize thevehicle.
There isan increased riskofskidding andanaccident.
X Drive oncarefully .
X Visit aqual ified speciali stworkshop immediately .194
Dis
play messagesOn-board comp uter anddisplays

Warning/
indic ator
lamp 00510051
Sign altype
Poss iblecause s/cons equen cesand 0050 0050
Sol utions 0025
0051
The yellow ABS warning lamp islit whi lethe engine isrunning.
ABS (Anti-lock BrakingSystem) isdea ctivated duetoamalfu nction. Therefore,
BAS (Brake Assist), ActiveBrakeAssist, ESP®
(Electronic StabilityProgra m),the
HOLD function andhillstart assist,for exampl e,are alsodea ctivated.
ATTENTION ASSISTisdea ctivated.
G WARNING
The brake system continues tofunction normally,but witho utthe functions listed
abo ve.The whee lscoul dtherefore lockifyou brake hard,for exampl e.
The steerab ility and braki ngchara cteristics maybesevere lyaffected. Thebraki ng
dista nceinan emerge ncybraki ngsitua tioncanincreas e.
If ESP ®
is not opera tional,ESP ®
is unab leto stabi lizethevehicl e.
There isan increas edrisk ofskiddi ngand anaccide nt.
X Observe theadditiona ldisp laymessa gesinthe multi function display.
X Drive oncarefu lly.
X Visi ta qua lified speci alist worksho pimmed iately.
If the ABS control unitisdefective ,there isals oapossi bility that other systems ,
such asthe naviga tionsystem orthe automatic transmissi on,willnot beava ilable . 0025
0051
The yellow ABS warning lamp islit whi lethe engine isrunning.
ABS istempora rilyunava ilable .There fore,BAS, Active BrakeAssist, ESP®
,EBD
(el ectronic brakeforcedistributio n),the HOLD function andhillstart assist,for
exampl e,are alsodea ctivated.
Possi blecaus esare:
R self-di agnosi sis not yetcomple te
R the on-board voltagemay beinsuffi cient
ATTENTION ASSISTisdea ctivated.
G WARNING
The brake system continues tofunction normally,but witho utthe functions listed
abo ve.The front andrear whee lscoul dtherefore lockifyou brake hard,for exam-
ple .
The steerab ility and braki ngchara cteristics maybesevere lyaffected. Thebraki ng
dista nceinan emerge ncybraki ngsitua tioncanincreas e.
If ESP ®
is not opera tional,ESP ®
is unab leto stabi lizethevehicl e.
There isarisk ofan accide nt.
X Ca reful lydrive asui table distance,making slightsteering movements ataspee d
abo ve12 mph (20km/h) .
The functions mentioned aboveare available aga inwhen thewarni nglamp goes
out.
If the warning lamp isstill on:
X Observe theadditiona ldisp laymessa gesinthe multi function display.
X Drive oncarefu lly.
X Visi ta qua lified speci alist worksho pimmed iately. 222
Warning
andindic atorlamps inthe instrum entclusterOn-bo ardcomput erand displays

Warning/
indic ator
lamp 00510051
Sign altype
Poss iblecause s/cons equen cesand 0050 0050
Sol utions 0025
0051
The yellow ABS warning lamp islit whi lethe engine isrunning. Awarni ngtone
als osound s.
EBD ismalfu nctioning. Therefore,ABS, BAS,Active BrakeAssist, ESP®
,the HOLD
function andhillstart assist,for exampl e,are not available either.
ATTENTION ASSISTisdea ctivated.
G WARNING
The brake system continues tofunction normally,but witho utthe functions listed
abo ve.The front andrear whee lscoul dtherefore lockifyou brake hard,for exam-
ple .
The steerab ility and braki ngchara cteristics maybesevere lyaffected. Thebraki ng
dista nceinan emerge ncybraki ngsitua tioncanincreas e.
If ESP ®
is not opera tional,ESP ®
is unab leto stabi lizethevehicl e.
There isan increas edrisk ofskiddi ngand anaccide nt.
X Observe theadditiona ldisp laymessa gesinthe multi function display.
X Drive oncarefu lly.
X Visi ta qua lified speci alist worksho pimmed iately. 0025
00E500BB
0027004D 0051
0027(USA only),004D (Canada only):the red brake warninglamp andtheyellow
ABS, ESP®
and ESP®
OFF warning lamp sare litwhi lethe engine isrunning.
ABS andESP®
are malfu nctioning. Therefore,BAS, Active BrakeAssist, EBD,the
HOLD function andhillstart assist,for exampl e,are not available either.
ATTENTION ASSISTisdea ctivated.
G WARNING
The brake system continues tofunction normally,but witho utthe functions listed
abo ve.The front andrear whee lscoul dtherefore lockifyou brake hard,for exam-
ple .
The steerab ility and braki ngchara cteristics maybesevere lyaffected. Thebraki ng
dista nceinan emerge ncybraki ngsitua tioncanincreas e.
If ESP ®
is not opera tional,ESP ®
is unab leto stabi lizethevehicl e.
There isan increas edrisk ofskiddi ngand anaccide nt.
X Observe theadditiona ldisp laymessa gesinthe multi function display.
X Drive oncarefu lly.
X Visi ta qua lified speci alist worksho pimmed iately. Warning
andindic atorlamps inthe instrum entcluster
223On-boardcomput erand displays Z

To
clean, useplenty ofwater andamild cleaning
agent without additional orabrasive products,
e.g. useacar shampoo approved forMercedes-
Benz .
X Dry vehicles coveredwithfilmusing asoft,
absorbent clothafterevery wash.
Water marks couldotherwise form.
Scr atches, corrosiv edeposits, areasaffectedby
corrosion anddamage causedbyinadequate
care cannotalway sbe completely repaired.In
such cases, visitaqualified specialist workshop.
X Remove dirtimmediately, wherepossible,
while avoiding rubbingtoohard.
The decorative filmmay beirreparably dam-
aged.
X Soak insect remains withinsect remover and
rinse offthe treated areasafterwards.
X Soak birddroppings withwater andrinse off
the treated areasafterwards.
The Paint Cleaner cleaning product, whichhas
been approved andrecomm endedby
Mercedes- Benz,should beused when dirthas
penetr atedthedecorative filmsurface orthe
decorative filmhasbecome dull.
The manufact urercanprovide youwith infor-
mation onspecial careandcleaning products.
Laminated surfacesmayexhibit optical differ-
ences tosurfaces whichwerenotprotec tedbya
decorative filmwhen thedecorative filmis
removed.
i Have
workorrepairs ondecorative filmcar-
ried outataqualified specialist workshop.
Mercedes- Benzrecomm endsthatyouusean
authorized Mercedes-BenzCenter forthis
purpose. Cleaning
thevehicle parts
Cleaning thewheels G
WARNIN
G
The water jetfrom acircular jetnoz zle(dirt
blasters) cancause invisible exteriordamage
to the tires orchassis compon ents.Compo-
nent sdamaged inthis way may failunexpect -
edly. There isarisk ofan accident .
Do not use power washers withcircular jet
noz zles toclean thevehicle. Havedamaged tires
orchassis compon entsreplaced imme-
diately.
! Do
not use acidic wheel cleaning products
to remove brakedust.Thiscould damage
wheel boltsandbrake compon ents.
! Do
not park yourvehicle foralong period of
time directly aftercleaning, particularly after
cleaning thewheel rimwith wheel cleaner.
Wheel cleaner canlead tothe increased cor-
rosion ofthe brake discsandpads. Therefore,
drive forafew minutes aftercleaning. By
heating upthe brakes, thebrake discsand
pads dry.Thevehicle canthen beparked fora
long period oftime.
Cleaning thewindows G
WARNIN
G
You could become trappedbythe windshield
wipers ifthey start moving whilecleaning the
windshield orwiper blades. Thereisarisk of
injury.
Always switchoffthe windshield wipersand
the ignition beforecleaning thewindshield or
wiper blades.
! Only
foldthewindshield wipersawayfrom
the windshield whenvertical.Otherwise, you
will damage thehood.
! Do
not use drycloths, abrasive products,
solvent sor cleaning agentscontaining sol-
vent sto clean theinside ofthe windows. Do
not touch theinsides ofthe windows with
hard object s,e.g. anice scraper orring. There
is otherwise arisk ofdamaging thewindows.
! Clean
thewater drainage channelsofthe
windshield andtherear window atregular
inter vals. Deposits suchasleaves, petalsand
pollen mayunder certaincircumst ancespre-
vent water fromdraining away.This canlead
to corrosion damageanddamage toelec-
tron iccompon ents.
X Clean theinside andoutside ofthe windows
with adamp clothandacleaning productthat
is recomm endedandapproved byMercedes-
Benz . 268
CareMaintenance
andcare