2018 MERCEDES-BENZ CLA COUPE light

Display messagesPossible causes/consequences andMSolutions
The yellow!warning lamp lights up. The red F(USAonly)
or ! (Canada only) indicator lamp flashes for about te nseconds
after th eelectric parking brak ehas been applie dorreleased. It then
goe sout or remain slit.
The electric parking brak eismalfunctioning .
XSwitchoff th eignition and tur nitbacko n.
XApply th eelectric parking brake.
If it is no tpossibl etoengage th eelectric parking brake:
XShift th etransmission to position B.
XVisitaqualified specialist workshop .
If it is no tpossibl etorelease th eelectric parking brak emanually:
XReleas ethe electric parking brak eautomatically (Ypage 142).
If th eelectric parking brak estill canno tbereleased:
XConsult aqualified specialist workshop .
The yellow!warning lamp lights up. If you manually apply or
release th eelectric parking brake, th ered F (USAonly) or !
(Canada only) indicator lamp flashes .
The electric parking brak eismalfunctioning .Itisnotpossibl etoapply
th ee lectric parking brak emanually.
XShift th etransmission to position B,astheelectric parking
brak eisn otapplie dautomatically.
XVisit aqualified specialist workshop .
F(USA
only)
!(Canada
only)
Parkin gBrake Inop‐
erativ e
The yellow !warning lamp lights up. The red F(USAonly)
or ! (Canada only) indicator lamp flashes for about te nseconds
after th eelectric parking brak ehas been applie dorreleased. It then
goe sout or remain slit.
The electric parking brak eismalfunctioning ,e.g.b ecause of over-
voltag eorundervoltage.
XRemove th ecaus efor th eovervoltage or undervoltage, e.g. by
charging th ebattery or restarting th eengine.
XEngage or release th eelectric parking brake.
If it remain simpossible to apply or release th eelectric parking brake:
XSwitc hoff th eignition and tur nitbacko n.
XEngage or release th eelectric parking brake.
If th eelectric parking brak estill canno tbereleased:
XConsult aqualified specialist workshop .
If th eelectric parking brak estill canno tbeapplied:
XVisitaqualified specialist workshop .
196Display messages
On-boardcomputer andd isplays

Display messagesPossible causes/consequences andMSolutions
The yellow!warning lamp lights up and th ered F (USAonly)
or ! (Canada only) indicator lamp flashes .
It is no tpossibl etoapply th eelectric parking brak emanually.
XShift th etransmission to position B.
XVisitaqualified specialist workshop .
$(USAonly)
J(Canada only)
Check Brake Fluid
Level
There is no tenough brak efluidint hebrak efluid reservoir .
Aw arning tone sounds. The $(USAonly) or J (Canada only)
warning lamp sintheinstrumen tcluste rmay also ligh tup.
GWARNIN G
The braking effec tmay be impaired.
There is ariskofana ccident.
XPull overand stop th evehicl esafely as soo naspossible, payin g
attention to roa dand traffic conditions. Do no tcontinue driving
under any circumstances.
XSecur ethe vehicl eagainst rollin gaway (Ypage 141).
XConsult aqualified specialist workshop .
XDo notadd brak efluid .This does no tcorrect them alfunction .
#
CheckBrakePadWear
The brak epads/linings hav ereached their wear limit.
XVisit aqualified specialist workshop .
G
Inoperative
Oneorm orem ain features of th embrace system are malfunctioning .
XVisitaqualified specialist workshop .
ActiveBrakeAssistFunctionsCurrentlyLimitedSee Opera‐tor's Manual
Active Brake Assis tistemporarily inoperative.
Possibl ecauses are:
RThe radar sensor system is temporarily inoperative, e.g. due to
electromagneti cradiation emitted by nearby TV or radi ostation sor
other source sofelectromagneti cradiation .
RThe system is outside th eoperating temperature range.
RThe on-boar dvoltag eistoolow.
Whe nthe causes state dabov enol onger apply, th edisplay message
disappears.
Active Brake Assis tisoperational again .
If th edisplay message does no tdisappear :
XPull overand stop th evehicl esafely as soo naspossible, payin g
attention to roa dand traffic conditions.
XSecur ethe vehicl eagainst rollin gaway (Ypage 141).
XRestart th eengine.
Active BrakeAssist :SystemInop‐erative
Active Brake Assis tisunavailable due to amalfunction .Situation -
dependen tbraking assistanc emay also hav efailed.
XVisit aqualified specialist workshop immediately.
Display messages197
On-boardc omputer andd isplays
Z

Display messagesPossible causes/consequences andMSolutions
RadarSensorsDirtySee Operator' sMan‐ual
The radar sensor system is malfunctioning .
Possibl ecauses are:
RDirt on sensor s
RHeavy rain or snow
RWhendrivin goni nter-urban roads without traffic or infrastructure,
e.g. in desert-like area s
At least on edrivin gsystem or drivin gsafet ysystem is malfunctioning
or is temporarily unavailable :
RActive Brake Assist
RDistancePilotD ISTR ONIC
Aw arning tone also sounds.
Once th ecaus eoft heproblem is no longer present, th edrivin gand
drive safet ysystems will be available again .The display message dis-
appears.
If th edisplay message does no tdisappear :
XPull overand stop th evehicl esafely as soo naspossible, payin g
attention to roa dand traffic conditions.
XSecur ethe vehicl eagainst rollin gaway (Ypage 141).
XSwitc hoff th eengine.
XClean all sensor s(Ypage 265).
XRestart theengine.
The display message disappears.
6
SRSMalfunctionSer ‐viceRequired
The restrain tsystem is malfunctioning .The 6 warning lamp also
lights up in th einstrumen tcluster.
GWARNIN G
The air bags or Emergency Tensioning Devices may either be triggered
unintentionally or, in th eevent of an accident, may no tbetriggered .
There is an increased ris kofinjury.
XVisit aqualified specialist workshop immediately.
Fo rfurther information about th erestrain tsystem, see (
Ypage 40).
6
Front Lef tMalfunc‐tionServic eRequiredorFrontRight MalfunctionServic eRequired
The restrain tsystem is malfunctioning at th efront on th eleftorr ight.
The 6 warning lamp also lights up in th einstrumen tcluster.
GWARNIN G
The air bags or Emergency Tensioning Devices may either be triggered
unintentionally or, in th eevent of an accident, may no tbetriggered .
There is an increased ris kofinjury.
XVisit aqualified specialist workshop immediately.
198Display messages
On-boardc omputer andd isplays

Display messagesPossible causes/consequences andMSolutions
6
RearLeftM alfunc‐tionServic eRequiredorRea rRight MalfunctionServic eRequired
The rear left-han dorright-hand restrain tsystem is malfunctioning .
The 6 warning lamp also lights up in th einstrumen tcluster.
GWARNIN G
The air bags or Emergency Tensioning Devices may either be triggered
unintentionally or, in th eevent of an accident, may no tbetriggered .
There is an increased ris kofinjury.
XVisit aqualified specialist workshop immediately.
6
Lef tSideC urtai nAirbag MalfunctionServic eRequiredor
Right Sid eCurtai n
Airbag MalfunctionServic eRequired
The left-han dorright-hand window curtai nair bag is malfunctioning .
The 6 warning lamp also lights up in th einstrumen tcluster.
GWARNIN G
The lef torright window curtai nair bag may either be triggered unin-
tentionally or, in th eevent of an accident, may no tbetriggered .
There is an increased ris kofinjury.
XVisit aqualified specialist workshop immediately.
Display messages199
On-boardc omputer andd isplays
Z

Display messagesPossible causes/consequences andMSolutions
If theconditi onsa re no tfulfilled ,the system is no toperating correctly.
XVisit aqualified specialist workshop immediately.
Fo rfurther information about th eOccupant Classification System, see
(
Ypage 48).
Lights
i
Vehicles wit hLED bulbs in th eligh tclusters :
The display message for th ecorre spondin glamp only appear swhen all of th eLEDsint helamp
hav efailed.
Display messagesPossible causes/consequences and MSolutions
b
Check LeftCorner ‐ing LightorCheckRight CorneringLight
The lef torright-hand cornering ligh tisdefective.
XChec kwhether you are permitte dtoreplace th ebulb yourself
(Ypage 104).
or
XVisit aqualified specialist workshop .
b
CheckLeftLowBeamorCheck Right LowBea m
The lef torright-hand low-beam headlamp is defective.
XChec kwhether you are permitte dtoreplace th ebulb yourself
(Ypage 104).
or
XVisit aqualified specialist workshop .
b
Check RearLeftTur nSignalor
Check Rea rRight
TurnSignal
The rear left-han dorrear right-hand tur nsignal is defective.
XChec kwhether you are permitte dtoreplace th ebulb yourself
(Ypage 104).
or
XVisit aqualified specialist workshop .
b
Check Front LeftTurnSignalor
Check Front Right
Tur nSignal
The fron tleft-han dorfrontright-hand tur nsignal is defective.
XChec kwhether you are permitte dtoreplace th ebulb yourself
(Ypage 104).
or
XVisit aqualified specialist workshop .
b
Check LeftMirrorTurnSignalor
Check Right Mirror
Tur nSignal
The tur nsignal in th eleft-han dorright-hand exterio rmirror is defec -
tive.
XVisit aqualified specialist workshop .
b
Check Center BrakeLamp
The high-mounte dbrak elamp is faulty.
XVisit aqualified specialist workshop .
202Display messages
On-boardcomputer andd isplays

Display messagesPossible causes/consequences andMSolutions
b
Check LeftBrakeLamporCheck RightBrake Lam p
The leftorright-hand brak elamp is defective.
XChec kwhether you are permitte dtoreplace th ebulb yourself
(Ypage 104).
or
XVisit aqualified specialist workshop .
b
CheckLeftTailandBrake Lampsor
Check Right Tai l
and Brake Lamps
The leftorright-hand tai llamp/brake lamp is defective.
XChec kwhether you are permitte dtoreplace th ebulb yourself
(Ypage 104).
or
XVisit aqualified specialist workshop .
b
CheckLeftHighBeamor Check RightHighBeam
The lef torright-hand high beam is defective.
XChec kwhether you are permitte dtoreplace th ebulb yourself
(Ypage 104).
or
XVisit aqualified specialist workshop .
b
LicensePlate Lam p
The leftorright-hand license plat elamp is faulty.
XVisit aqualified specialist workshop .
b
RearFog Lam p
The rear fog lamp is faulty.
XCheckwhether you are permitte dtoreplace th ebulb yourself
(Ypage 104).
or
XVisit aqualified specialist workshop .
b
Check Front LeftParkingLampor
Check Front Right
Parkin gLamp
The fron tleftorf rontright parking or standing lamp is defective.
XChec kwhether you are permitte dtoreplace th ebulb yourself
(Ypage 104).
or
XVisit aqualified specialist workshop .
b
Backup Light
The backup lamp is defective.
XCheckwhether you are permitte dtoreplace th ebulb yourself
(Ypage 104).
or
XVisit aqualified specialist workshop .
b
Check LeftTailLam porCheck RightTai lLamp
The lef torright-hand tai llamp is defective.
XVisit aqualified specialist workshop .
Display messages203
On-boardc omputer andd isplays
Z

Display messagesPossible causes/consequences andMSolutions
b
Check Front LeftSidemarkerLampor
Check Front Right
Sidemarke rLamp
The fron tleft-han dorfrontright-hand side marke rlamp is faulty.
XVisit aqualified specialist workshop .
b
Check RearLeftSidemarke rLampor
Check Rea rRight
Sidemarke rLamp
The rear left-han dorrear right-hand side marke rlamp is faulty.
XVisit aqualified specialist workshop .
b
Check LeftDaytim eRunnin gLightor
CheckRightDaytim eRunningLight
The lef torright-hand daytime runnin glamp is faulty.
XChec kwhether you are permitte dtoreplace th ebulb yourself
(Ypage 104).
or
XVisit aqualified specialist workshop .
b
Malfunction SeeOperator'sManual
The exterio rlighting is malfunctioning .
XVisitaqualified specialist workshop .
b
AutoLampF unctionInoperative
The ligh tsensor is defective.
XVisit aqualified specialist workshop .
b
Switch Off Lights
The lights are still switched on when you leav ethe vehicle. Awarning
tone also sounds.
XTurn th eligh tswitch to th eà position .
b
Switch On Headlamps
You are drivin gwithl ow-beam headlamp sswitched off .
XTurn theligh tswitch to th eL orà position .
Adaptive HighbeamAssist CurrentlyUnavailable SeeOperator' sManual
Adaptive Highbea mAssistisd eactivated and temporarily inoperative.
Possibl ecauses are:
RThe windshield in th ecamera' sfield of vision is dirty.
RVisibilit yisimpaire ddue to heav yrain ,sno worf og.
XClean th ewindshield.
If th esystem detects that th ecamera is full yoperational again ,the
Adaptive
HighbeamAssistNowAvailablemessage is displayed.
Adaptive Highbea mAssistiso perational again .
Adaptive HighbeamAssist InoperativeAdaptive Highbea mAssistisf aulty.
XVisit aqualified specialist workshop .
204Display messages
On-boardcomputer andd isplays

Warning and indicator lamps in the instrument cluster
General notes
Some systems carry outaself-diagnosis when the ignition is switched on. Therefore, some indicator
and warning lamps may light up or flas htemporarily .This behavior is non-critical.
These indicator and warning lamps only indicate amalfunction if they light up or flas hafter starting
the engine or whilst driving.
Safety
Seat belts
Warning/
indicator
lampNSignal type
Possiblec auses/consequence sand M
Solutions
üNAfter engine start, the red seatb eltwarning lam plights up for six seconds.
The seatb eltwarning lam preminds the drivera nd front passenger to fasten their
seatb elts.
XFasten you rseatb elt(Ypage44).
üNAfter starting the engine, the red seatb eltwarning lam plights up. In addition, a
warning tone sound sfor up to six seconds.
The driver's seatb eltisnot fastened.
XFasten you rseatb elt(Ypage44).
The warning tone ceases.
üN The red seatb eltwarning lam plights up after the engine starts, as soon as the
driver's or the front-passenger door is closed.
The driverorf ront passenger has not fastened their seatb elt.
XFasten yourseatb elt(Ypage44).
The warning lam pgoes out.
There are objects on the front-passenger seat.
XRemove the objects from the front-passenger seata nd stow them inasecure
place.
The warning lam pgoes out.
üNThe red seatb eltwarning lam pflashes and an intermittent audible warning
sounds.
The driverorf ront passenger has not fastened their seatb elt. The vehicleisbeing
drivenf aster than 15 mph (25 km/h )orhas briefly been drivenf aster than 15 mph
(25 km/h).
XFasten you rseatb elt(Ypage44).
The warning lam pgoes out and the intermittent warning tone ceases.
There are objects on the front-passenger seat. The vehicleisb eing drivenfaster
than 15 mph (25 km/h )orhas briefly been drivenf aster than 15 mph (25 km/h).
XRemove the objects from the front-passenger seata nd stow them inasecure
place.
The warning lam pgoes out and the intermittent warning tone ceases.
218Warning and indicator lamps in the instrument cluster
On-board computer and displays