2018 MERCEDES-BENZ CLA COUPE Owner's Manual

When the ignition is switched off, all display messages are deleted, apart from some high-priority
display messages. Oncethe causes of the high-priorityd isplay messages have been rectified, the
corresponding display messages are also deleted.
When you stop and park the vehicle, please observe the notes on:
RHOLD function (Ypage 157)
RParking (Ypage 141)
Hiding displaym essages
XPress theaor% button on the steerin gwheel.
The multifunction display hides the display message.
The multifunction display shows high-priorityd isplay messages in red. Some high-prioritydisplay
messages cannot be hidden.
The multifunction display shows these messages continuously until the causes for the messages
have been remedied.
Message memory
The on-board computer saves certain display messages in the message memory.You can call up
the display messages:
XPress the =or; button on the steerin gwheel to select the Serv.menu.
If there are display messages, the multifunction display shows 2Messages,for example.
XPress the 9or: button to select the entry, e.g. 2Messages.
XPress ato confirm.
XPress the 9or: button to scroll through the display messages.
Display messages191
On-boardc omputer and displays
Z

Safety systems
Display messagesPossible causes/consequences andMSolutions
!÷
Currently Unavaila‐ble See Operator'sManual
ABS (Anti-lock Braking System), BAS (Brake Assist), ESP®(Electronic
Stability Program), the HOLD function and hill start assist are tempo-
rarily unavailable.
Active Brake Assist may have also failed.
In addition, the !,÷andå warning lamps may light up in
the instrument cluster.
ATTENTION ASSIST is deactivated.
Possible causes are:
RSelf-diagnosis is not yet complete
RThe on-board voltage may be insufficient
GWARNING
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you brake
hard, for example.
The steerability and braking characteristics may be severely affected.
The braking distance in an emergency braking situation can increase.
If ESP
®is not operational, ESP®is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
XCarefully drive ashort distance on asuitables tretchofr oad, making
slight steering movements at aspeed above 12 mph (20 km/h).
If the displaym essage disappears, the functions mentioned above
are available again.
If the multifunction displays till shows the displaymessage:
XDrive on carefully.
XVisitaqualified specialist workshop immediately.
!÷
Inoperative SeeOperator's Manual
ABS, BAS, ESP®,the HOLD function and hill start assist are not avail-
able due to amalfunction.
Active Brake Assist may have also failed.
The !, ÷,åand$ (USA only) or J(Canadao nly)
warning lamps in the instrument cluster may also light up.
ATTENTION ASSIST is deactivated.
GWARNING
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you brake
hard, for example.
The steerability and braking characteristics may be severely affected.
The braking distance in an emergency braking situation can increase.
If ESP
®is not operational, ESP®is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
XDrive on carefully.
XVisit aqualified specialist workshop immediately.
192Display messages
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
÷
Currently Unavaila‐ble See Operator'sManual
ESP®,BAS ,the HOLD function and hill start assist are temporarily
unavailable .
Active Brake Assis tmay hav ealso failed.
In addition ,the ÷ andå warning lamp smay ligh tupint he
instrumen tcluster.
ATTENTION ASSIST is deactivated.
The self-diagnosis function might no tbecomplete, for example.
GWARNIN G
The brak esystem continues to function normally, but without th e
function slisted above.
The braking distanc einanemergenc ybraking situation can thus
increase.
If ES P
®is no toperational, ES P®is unable to stabiliz ethe vehicle.
There is an increased ris kofskiddin gand an accident.
XCarefully drive asuitable distance, making slight steering move-
ments at aspeed abov e12mph(20 km/ h).
If the display messaged isappears, the functions mentioned above
are available again.
If the multifunction display still shows the display message:
XDrive on carefully.
XVisit aqualifieds pecialist workshop immediately.
÷
Currently Unavaila‐ble See Operator'sManual
ESP®,BAS, the HOLD function and hill start assist are unavailable due
to am alfunction.
Active Brake Assist may have also failed.
In addition, the ÷andå warning lampsm ay lightupinthe
instrument cluster.
ATTENTION ASSISTisd eactivated.
GWARNING
The brake system continues to function normally,b ut withoutthe
functions listed above.
The braking distance in an emergency braking situation can thus
increase.
If ESP
®is not operational, ESP®is unabl etostabilize the vehicle.
There is an increased risk of skidding and an accident.
XDrive on carefully.
XVisit aqualifieds pecialist workshop immediately.
Display messages193
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
T!
÷
Inoperative SeeOperator' sManual
EBD( electronic brak eforce distribution), ABS, BAS, ES P®,the HOLD
function and hill start assist are no tavailable due to amalfunction .
Active Brake Assis tmay hav ealso failed.
Aw arning tone sounds.
In addition ,the ÷, åand! warning lamp smay ligh tupin
th ei nstrumen tcluster.
GWARNIN G
The brak esystem continues to function normally, but without th e
function slisted above. The fron tand rear wheels could therefor eloc k
if you brak ehard, for example.
The steerabilit yand braking characteristics may be severely affected.
The braking distanc einanemergenc ybraking situation can increase.
If ES P
®is no toperational, ES P®is unable to stabiliz ethe vehicle.
There is an increased ris kofskiddin gand an accident.
XDrive on carefully.
XVisit aqualified specialist workshop immediately.
F(US A
only)
!(Canada
only)
Tur nOnt he Igni‐
tiontoReleas etheParkingBrake
The red F(USAonly) or ! (Canada only) indicator lamp lights
up.
You attempte dtorelease th eelectric parking brak ewhile th eignition
was switched off .
XSmartKey:tur nthe SmartKey to position 1in th eignition lock.
XKEYLESS-GO: switch on theignition .
F(USA
only)
!(Canada
only)
Please
Releas ePark‐ing Brake
The red F(USAonly) or ! (Canada only) indicator lamp flashes
and awarning tone sounds. Aconditi on for automatic release of th e
electric parking brak eisnotfulfilled (
Ypage 143).
You are drivin gwitht he electric parking brak eapplied.
XReleas ethe electric parking brak emanually.
The red F(USAonly) or ! (Canada only) indicator lamp flashes
and awarning tone sounds.
You are usin gthe electric parking brak efor emergenc ybraking
(
Ypage 83).
F(US A
only)
!(Canada
only)
Parkin gBrake See
Operator' sManual
The yellow !warning lamp lights up.
The electric parking brak eismalfunctioning .
To apply :
XSwitchthe ignition off .
XPress theelectric parking brak ehandle for at least te nseconds.
XShift th etransmission to position B.
XConsultaqualified specialist workshop .
194Display messages
On-boardcomputer andd isplays

Display messagesPossible causes/consequences andMSolutions
The yellow!warning lamp and th ered F (USAonly) or !
(Canada only) indicator lamp ligh tup.
The electric parking brak eismalfunctioning .
To release:
XSwitc hoff th eignition and tur nitbacko n.
XReleas ethe electric parking brak emanually.
or
XReleas ethe electric parking brak eautomatically (Ypage 142).
If th eelectric parking brak estill canno tbereleased:
XDo no tdrive on .
XConsult aqualified specialist workshop .
The redF(USAonly) or ! (Canada only) indicator lamp flashes
and th eyellow !warning lamp lights up.
The electric parking brak eismalfunctioning .
To release:
XSwitc hoff th eignition and tur nitbacko n.
XReleas ethe electric parking brak emanually.
To apply :
XSwitchoff th eignition and tur nitbacko n.
XApply th eelectric parking brak emanually.
If th ered F (USAonly) or ! (Canada only) indicator lamp con-
tinue stof lash:
XDo no tdrive on .
XSecurethe vehicl eagainst rollin gaway (Ypage 309).
XShift th etransmission to position B.
XTurn thefront wheels toward sthe curb.
XConsult aqualified specialist workshop .
Display messages195
On-boardc omputer andd isplays
Z

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