MERCEDES-BENZ CLA COUPE 2018 Owner's Manual

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
FrontPassengerAir‐bag Disabled SeeOperator' sManual
The front-passenger air bag and front-passenger knee bag are deac -
tivated during th ejou rney, although:
Ran adult
or
Rap erson of th ecorre spondin gstatur eisont hefront-passenger seat
If additional force sare applie dtotheseat ,the system may interpret
th eo ccupant's weigh taslower than it actually is.
GWARNIN G
The front-passenger fron tair bag and fron tpassenger knee bag may
no tbet riggered in th eevent of an accident.
There is an increased ris kofinjury.
XPull ove rand stop th evehicl esafely as soo naspossible, payin g
attention to roa dand traffic conditions.
XSecur ethe vehicl eagainst rollin gaway (Ypage 141).
XSwitc hthe ignition off .
XHavethe occupant on th efront-pa ssenger seat get out of th evehi-
cle .
XKee pthe seat unoccupied ,close th efront-pa ssenger door and
switch on th eignition .
XObserv ethe PASSENGER AI RBAG indicator lamp sinthecenter
console and th emultifunction display and chec kthe following:
Seat unoccupied and ignition switched on :
Raself-diagnosis is carrie dout.T he PASSENGER AI RBAG OFFa nd
PASSENGER AI RBAG ON indicator lamp smustligh tups imulta-
neousl yfor approximately six seconds
RtheP ASSENG ER AIRBAG OF Findicator lamp mus tthe nligh tup
and remain lit after th eself-diagnosis .Iftheindicator lamp is on ,
OCS (Occupant Classification System) has deactivated th efront -
passenger fron tair bag and front-passenger knee bag
(
Ypage 48)
Rth eFront Passenger Airbag Enable dSee Operator' sManualorFront Passenger Airbag Disabled See Opera‐tor's Manualdisplay message smustn otbe shown in th emul-
tifunction display
XWait for aperiod of at least 60 seconds until th eneces sarysystem
checks hav ebeen completed.
XMak esuret hatthe display message sdonotappear in th emulti-
function display.
If these condition sare fulfilled ,the front-passenger seat can be occu-
pied again .Whether th ePASSENG ER AIRBAG OFForONi ndicator
lamp remain slit or goe sout depend sonhow OCS classifies th eoccu-
pant.
If th econditi 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) .
200Display messages
On-boardc omputer andd isplays

Display messagesPossible causes/consequences andMSolutions
FrontPassengerAir‐bag Enable dSeeOperator' sManual
The front-passenger air bag and front-passenger knee bag are enabled
during th ejou rney, eve nthough :
Rachild, asmall adult or an objec tweighing less than th esystem' s
weigh tthreshold is locate donthefront-passenger seat
or
Rth ef ront-pa ssenger seat is unoccupied
The system may detec tobjects or force sapplyin gadditional weigh ton
th es eat .
GWARNIN G
The front-passenger fron tair bag and front-passenger knee bag may
be triggered unintentionally.
There is an increased ris kofinjury.
XPull ove rand stop th evehicl esafely as soo naspossible, payin g
attention to roa dand traffic conditions.
XSecur ethe vehicl eagainst rollin gaway (Ypage 141).
XSwitc hthe ignition off .
XOpenthe front-passenger door .
XRemove thechild and th echild restrain tsystem from th efront -
passenger seat .
XMakesuret hatthe re are no objects on th eseat addin gtothe
weight.
The system might otherwise detec tthe additional weigh tand inter-
pre tthe seat occupant's weigh tasgreatertha nita ctually is.
XKeepthe seat unoccupied ,close th efront-pa ssenger door and
switch on th eignition .
XObserv ethe PASSENGER AI RBAG indicator lamp sinthecenter
console and th emultifunct ion display and chec kthe following:
Seat unoccupied and ignition switched on :
Raself-diagnosis is carrie dout.T he PASSENGER AI RBAG OFFa nd
PASSENGER AI RBAG ON indicator lamp smustligh tups imulta-
neousl yfor approximately six seconds
RtheP ASSENG ER AIRBAG OFFindicator lamp mus tthe nligh tup
and remain lit after th eself-diagnosis .Iftheindicator lamp is on ,
OCS has deactivated th efront-pa ssenger fron tair bag and front-
passenger knee bag (
Ypage 48)
RtheFront Passenger Airbag Enable dSee Operator' sManualorFront Passenger Airbag Disabled See Opera‐tor's Manualdisplay message smustn otbe shown in th emul-
tifunction display
XWait for aperiod of at least 60 seconds until th eneces sarysystem
checks hav ebeen completed.
XMak esuret hatthe display message sdonotappear in th emulti-
function display.
If these condition sare fulfilled ,the front-passenger seat can be occu-
pied again .Whether th ePASSENG ER AIRBAG OFForONi ndicator
lamp remain slit or goe sout depend sonhow OCS classifies th eoccu-
pant.
Display messages20 1
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

Engine
Display messagesPossible causes/consequences andMSolutions
+
CheckCoolantLevelSee Operator'sMan‐ual
The coolant levelistoolow.
!Avoid making longj ourneys with to olittle coolant in th eengine
cooling system. The engine will otherwise be damaged.
XAdd coolant ,observing th ewarning note sbefore doings o
(Ypage 260).
If you have to ad dcoolan tfrequently:
XContac taqualified specialist workshop and have th eengine cooling
system checked.
?The fan motor is malfunctioning.
XAt coolant temperatures below 24 8‡(120 †), drive to the nearest
qualified specialist workshop.
XAvoid heavy loads on the engine as you do so, e.g. driving in moun-
tainou sterrai nand stop-and-go traffic.
?
CoolantT oo HotStop VehicleT urnEngine Off
The coolant is too hot.
Awarning tone also sounds.
GWARNING
Do not drive whe nyoure ngine is overheated. This can cause some
fluids which may have leaked into the engine compartment to catch
fire.
Steam from the overheated engine can also cause serious burns which
can occur just by opening the hood.
There is arisk of injury.
XPul lover and stop the vehicle safely and switch off the engine, pay-
ing attention to road and traffic conditions.
XSecure the vehicle against rolling away (Ypag e141).
XWai tuntil the engine has cooledd own.
XMake sure that the airsupply to the engine radiator is not blocked,
e.g. by snow, slush or ice.
XDo not start the engine again until the displaym essage goes out and
the coolant temperature is below 248 ‡(120 †). Otherwise, the
engine coul dbedamaged.
XPay attention to the coolant temperature gauge.
If the temperature increase sagain:
XVisitaq ualified specialist workshop immediately.
Under normal operating conditions and with the specified coolant
level, the coolant temperature may rise to 248 ‡(120 †).
Display messages205
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
#
See Operator'sMan‐ual
The battery is no tbein gcharged.
Aw arning tone also sounds.
Possibl ecauses are:
Rad efective alternato r
Ratornp oly-V-belt
Ram alfunction in th eelectronics
!Do no tcontinue driving. The engin ecould otherwise overheat.
XPull ove rand stop th evehicl esafely and switch off th eengine, pay-
ing attention to roa dand traffic conditions.
XSecur ethe vehicl eagainst rollin gaway (Ypage 141).
XConsult aqualified specialist workshop .
#
StopVehicl eSeeOperator' sManual
The battery is no longer bein gcharged and th econditi on of charg eis
to ol ow.
Aw arning tone also sounds.
XPull ove rand stop th evehicl esafely and switch off th eengine, pay-
ing attention to roa dand traffic conditions.
XSecur ethe vehicl eagainst rollin gaway (Ypage 141).
XObserv ethe instruction sinthedisplay message #See Oper‐ator's Manual.
XConsult aqualified specialist workshop .
4
CheckEngineOilAtNextRefueling
The engin eoil level has dropped to th eminimum level.
Aw arning tone also sounds.
!Avoid lon gjou rneys wit htoo littl eengineo il. The engin ewill oth-
erwise be damaged.
XChec kthe oil level when next refueling, at th elatest (Ypage 258).
XIf necessary, add engin eoil(Ypage 259).
If th eengin eoil need stoppin gupm oreo ften:
XContac taqualified specialist workshop and hav ethe engin e
checked.
Information on approve dengineo ils can be obtained from any quali-
fie ds pecialist workshop or on th eInterne tath ttp:// bevo.mercedes -
benz.com.
æ
Fue lLevel Low
The fuel level has dropped int othe reserv erange.
XRefue lattheneares tgas station .
206Display messages
On-boardc omputer andd isplays

Display messagesPossible causes/consequences andMSolutions
çThere is onlyaverys mall amount of fuel in th efuel tank.
XRefue lattheneares tgas station without fail .
æ
Gas Cap Loose
The fuel filler cap is no tclosed correctl yorthefuel system is leaking .
XCheckthatthe fuel filler cap is correctl yclosed .
If th efuelfiller cap is not correctl yclosed :
XClosethe fuel filler cap .
If th efuelfiller cap is correctl yclosed :
XVisitaqualified specialist workshop .
Driving systems
Display messagesPossible causes/consequences and MSolutions
À
Attention Assist:TakeaB reak!
Based on certain criteria, ATTENTION ASSIST has detecte dfatigue or
al ack of concentration on th epart of th edriver .Aw arning tone also
sounds.
XIf necessary, tak eabreak.
During lon gjou rneys, tak eregular breaks in goo dtimesoy ou get
enough rest.
À
Attention AssistInoperative
ATTENTION ASSIST is inoperative.
XVisit aqualified specialist workshop .
ë
Off
The HOLD function is deactivated. The vehicl eisskidding.
Aw arning tone also sounds.
XReactivat ethe HOLD function later (Ypage 157).
The HOLD function is deactivated. Whe nthe brak epedal is firmly
depressed, an activation condition is no tfulfilled .
Aw arning tone also sounds.
XChec kthe activation condition sfor th eHOLDf unction
(Ypage 157).
Display messages20 7
On-boardc omputer andd isplays
Z

Display messagesPossible causes/consequences andMSolutions
LaneKeepin gAssistCurrently Unavaila‐ble See Operator' sManual
LaneKeepin gAssistisd 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.
RThere hav ebeen no lan emarking sfor an extended period
RThe lan emarking sare wor naway, dark or covered up, e.g. by dir tor
snow
Whe nthe causes state dabov enol onger apply, th edisplay message
disappears.
Lan eKeepin gAssistiso perational 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).
XClean th ewindshield.
Lan eKeepin gAssistInoperativeLaneKeepin gAssistisf aulty.
XVisit aqualified specialist workshop .
Blind SpotAssistCurrently Unavaila‐ble See Operator' sManual
Blind Spot Assististemporarily 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 radar sensor system is outside th eoperating temperature
range.
The yellow 9indicator lamp salso ligh tupint heexterio rmirrors.
Whe nthe causes state dabov enol onger apply, th edisplay message
disappears.
Blind Spot 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.
Blind Spo tAssistInoperativeBlind Spot Assis tisfaulty.
The yellow 9indicator lamp salso ligh tupint heexterio rmirrors.
XVisit aqualified specialist workshop .
ParkingPilot Can ‐celedThe driver's door is open and th edriver's seat belt has no tbeen fas -
tened.
XRepeat th eparking process wit hthe seat belt fastene dand th e
driver's door closed .
208Display messages
On-boardcomputer andd isplays