engine MERCEDES-BENZ C CLASS 2018 Owners Manual

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 gon inter-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 Assistwit hcross-traffic function
RActive Brake Assis t
RActive LaneKeepin gAssis t
RActive Blind Spot Assis t
RDistancePilo tDISTRONI Cwit hSteering Pilo t
If th eradar sensor system in fron tis dirty, Active Blind Spot Assis twill
no tperfor m acourse-correcting brak eapplication .
Once th ecaus eof th eproblem 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 nas possible, payin g
attention to roa dand traffic conditions.
XSecur eth evehicl eagainst rollin gaway (Ypage 161).
XSwitchoff th eengine.
XClean all sensor s (Ypage 312).
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 tbe triggered .
There is an increased ris kof injury.
XVisit aqualified specialist workshop immediately.
Fo rfurther information about th erestrain tsystem, see (
Ypage 44).
6
Front Lef tMalfunc‐tio nServic eRequiredorFrontRight MalfunctionServic eRequired
The restrain tsystem is malfunctioning at th efron ton th elef tor right .
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 tbe triggered .
There is an increased ris kof injury.
XVisit aqualified specialist workshop immediately.
238Display messages
On-board computer and displays

Engine
Display messagesPossible causes/consequences andMSolutions
+
CheckCoolantLevelSee Operator's Man‐ual
The coolant level is too low.
!Avoid making long journeys with too little coolant in the engine
cooling system. The engine will otherwise be damaged.
XAdd coolant, observing the warning notes before doing so
(Ypage 306).
If you have to add coolant frequently:
XContact a qualified specialist workshop and have the engine cooling
system checked.
?The fan motor is malfunctioning.
XIf the coolant temperature is below the red marking in the coolant
temperature gauge, drive to the nearest qualified specialist work-
shop.
XAvoid heavy loads on the engine as you do so, e.g. driving in moun-
tainous terrain and stop-and-go traffic.
?
Coolant Too HotStop Vehicle TurnEngine Off
The coolant is too hot.
A warning tone also sounds.
GWARNING
Do not drive when your engine 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 a risk of injury.
XPull over and stop the vehicle safely and switch off the engine, pay- ing attention to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 161).
XWait until the engine has cooled down.
XMake sure that the air supply to the engine radiator is not blocked,
e.g. by snow, slush or ice.
XDo not start the engine again until the display message goes out and
the coolant temperature gauge is below the red marking. Other-
wise, the engine could be damaged.
XPay attention to the coolant temperature gauge.
If the temperature increases again:
XVisit a qualified specialist workshop immediately.
Under normal operating conditions and with the specified coolant
level, the coolant temperature gauge may rise to the red marking.
Display messages243
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
#
See Operator'sMan ‐ual
The battery is no tbein gcharged.
A warning tone also sounds.
Possibl ecauses are:
Radefective alternato r
Ratorn poly-V-belt
Ramalfunction in th eelectronics
!Do no tcontinu edriving. 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 eth evehicl eagainst rollin gaway (Ypage 161).
XConsult aqualified specialist workshop .
#
StopVehicl eSeeOperator' sManual
The battery is no longer bein gcharged and th econdition of charg eis
to olow.
A warning tone also sounds.
XPull ove rand stop th evehicl esafely and switch off th eengine, pay-
ing attention to roa dand traffic conditions.
XSecur eth evehicl eagainst rollin gaway (Ypage 161).
XObserv eth einstruction sin th e# See Operator' sManualdisplay message .
XConsultaqualified specialist workshop .
#
StopVehicl eLeaveEngine Runnin g
The battery condition of charg eis to olow.
XPull ove rand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions. Do no tcontinu edrivin g
under any circumstances.
XLeav eth eengin erunning.
XWait until th edisplay message disappear sbefore pullin gaway.
#
Start Engine SeeOperator' sManual
The engin eis switched off and th econdition of charg eis to olow.
XSwitc hoff electrical consumer sthat you do no tneed, suc has th e
rear window defroste rand interior lighting .
XLeaveth eengin erunnin gfor afew minute sor drive alon gdistance.
The battery is bein gcharged.
244Display messages
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
4
CheckEngineOilAtNextRefueling
The engin eoil level has dropped to th eminimum level.
A warning tone also sounds.
!Avoid lon gjourneys wit hto olittl eengin eoil. The engin ewill oth-
erwise be damaged.
XChec kth eoil level when next refueling, at th elatest (Ypage 305).
XIf necessary, add engin eoil (Ypage 305).
If you have to ad dengin eoil frequently:
XContac t aqualified specialist workshop and hav eth eengin e
checked.
Information on approve dengin eoils can be obtained from aqualified
specialist workshop or on th eInternet at http://bevo.mercedes -
benz.co m.
4
Check Engine OilLevel(Add1quart)(USA)Check EngineOil Level (Add 1Liter)(Canada)
Mercedes-AMG C 63 vehicles:
The engine oil level has dropped to the minimum level.
!Avoid long journeys with too little engine oil. The engine will oth-
erwise be damaged.
XCheck the oil level when next refueling, at the latest (Ypage 305).
XIf necessary, add engine oil (Ypage 305).
If you have to add engine oil frequently:
XContact a qualified specialist workshop and have the engine
checked.
Information on approved engine oils can be obtained from a qualified
specialist workshop or on the Internet at http://bevo.mercedes-
benz.com.
4
Engine Oil LevelLow Stop VehicleTurn Engine Off
Mercedes-AMG C 63 vehicles:
The engine oil level is too low. There is a risk of engine damage.
XPull over and stop the vehicle safely and switch off the engine, pay-
ing attention to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 161).
XCheck the engine oil level (Ypage 305).
XIf necessary, add engine oil (Ypage 305).
8
Fuel Level Low
The fuel level has dropped into the reserve range.
XRefuel at the nearest gas station.
CThere is only a very small amount of fuel in the fuel tank.
XRefuel at the nearest gas station without fail.
Display messages245
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
8
Gas Cap Loose
The fuel filler cap is notclosed correctl yor th efuel system is leaking .
XCheckthat th efuel filler cap is correctl yclosed .
If th efuel filler cap is not correctl yclosed :
XCloseth efuel filler cap .
If th efuel filler cap is correctl yclosed :
XVisitaqualified specialist workshop .
¸
ReplaceAir Filter
Vehicles wit h adiesel engine:
The engin eair filter is dirty and mus tbe replaced.
XVisit aqualified specialist workshop .
!
Check FuelFilter
Vehicles wit h adiesel engine:
There is water in th efuel filter. The water mus tbe draine doff .
XVisit aqualified specialist workshop .
Check Additive SeeOwner'sManualThe DE Ftan kis almost empty.
XHav eth eDE Ftan kfilled as soo nas possibl eat aqualified specialist
workshop (Ypage 158).
The DEFsystem is malfunctioning .
XVisitaqualified specialist workshop .
Remaining Starts:16The DEFlevel has fallen to aminimum .You can start th eengin e a
further 16 times .
XHaveth eDE Ftan kfilled immediately at aqualified specialist work-
sho p (Ypage 158).
iYou can start th eengin e afurther 16 times .If DE Fis no tadded ,it
will then no tbe possibl eto restar tth eengine. Refill th eDE Ftan k
wit happroximately 1. 1gal (4. 0l) of DE F (
Ypage 158).
If the10 start sdisplay message is shown and awarning tone also
sounds, then th eDE Fsystem is malfunctioning .
XVisitaqualified specialist workshop .
246Display messages
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
LaneKeepin gAssistCurrently Unavaila‐ble See Operator' sManualorActiveLan eKeepin gAssistCurrently Unavaila‐ble See Operator' sManual
LaneKeepin gAssis tor Active Lan eKeepin gAssis tis deactivated and
temporarily inoperative.
Possibl ecauses are:
RThe windshield in th ecamera' sfield of vision is dirty.
RVisibilit yis impaire ddue to heav yrain ,snow or fog .
RThere havebeen no lan emarking sfor an extended period
RThe lan emarking sare wor naway, dark or covered up, e.g. by dir tor
snow.
Whe nth ecauses state dabov eno longer apply, th edisplay message
disappears.
Lan eKeepin gAssis tor Active Lan eKeepin gAssis tis operational
again .
If th edisplay message does no tdisappear :
XPull overand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions.
XSecur eth evehicl eagainst rollin gaway (Ypage 161).
XClean th ewindshield.
Lan eKeepin gAssistInoperativeor
ActiveLan eKeepin gAssist Inoperative
LaneKeepin gAssis tor Active Lan eKeepin gAssis tis malfunctioning .
XVisitaqualified specialist workshop .
Blind SpotAssistCurrently Unavaila‐ble See Operator' sManualorActiveBlind Spo tAssistCurrently Unavaila‐ble See Operator' sManual
Blind Spot Assistor Active Blind Spot Assis tis temporarily inoperative.
Possibl ecauses are:
RThe radar sensor system is outside th eoperating temperature
range.
RThe radar sensor system is temporarily inoperative, e.g. due to
electromagneti cradiation emitted by nearby TV or radi ostation sor
other source sof electromagneti cradiation .
Whe nth ecauses state dabov eno longer apply, th edisplay message
disappears.
Blind Spot Assis tor Active Blind Spot Assis tis operational again .
If th edisplay message does no tdisappear :
XPull overand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions.
XSecur eth evehicl eagainst rollin gaway (Ypage 161).
XRestart th eengine.
Blind Spo tAssistInoperativeor
Active Blind Spo t
Assist Inoperative
Blind Spot Assistor Active Blind Spot Assis tis malfunctioning .
XVisitaqualified specialist workshop .
ParkingPilot Can ‐celedThe driver's door is open .
XRepeat theparking gap measuremen tand parking process wit hth e
driver's door closed .
248Display messages
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
You touched themultifunction steering whee lwhile steering inter-
vention was active .
XWhilesteering intervention is active ,mak esur ethat th emultifunc-
tion steering whee lis no ttouched unintentionally.
The vehicl ehas started to skid and ES P®has intervened.
XUse theParking Pilo tagain later (Ypage 184).
ParkingPilot Inop‐erativ eParking Pilo tis malfunctioning or defective.
XFollow th einstruction sand helpful hints in th e"Problem swit h
Parking Assis tPARKTRONIC" section (Ypage 190).
If th emultifunction display still shows th edisplay message :
XVisitaqualified specialist workshop .
Parking Pilotis unavailable or malfunctioning .
XSwitchoff th eignition and restar tth eengine.
If th eParking Pilo tcontinues to be unavailable (the jsymbol does
no tappear in th emultifunction display):
XVisit aqualified specialist workshop .
ParkingPilot Fin ‐ishedThe vehicleis parked. Awarning tone also sounds.
The display message disappear sautomatically.
Traffi cSignAssistCurrently Unavaila‐ble See Operator' sManual
Traffic SignAssis tis temporarily inoperative.
Possibl ecauses are:
RThe windshield in th ecamera' sfield of vision is dirty.
RVisibilit yis impaire ddue to heav yrain ,snow or fog .
XClean thewindshield.
If th esystem detects that th ecamera is full yoperational, th edisplay
message disappears.
Traffic Sig nAssis tis operational again .
TrafficSignAssistInoperativeTraffic Sig nAssis tis malfunctioning .
XVisitaqualified specialist workshop .
ë
Off
The HOLD function is deactivated. The vehicl eis skidding.
A warning tone also sounds.
XReactivat eth eHOLD function later (Ypage 180).
The HOLD function is deactivated. Whe nth ebrak epedal is firmly
depressed, an activation condition is no tfulfilled .
A warning tone also sounds.
XChec kth eactivation condition sfor th eHOLD function
(Ypage 179).
Distance Pilot OffDistanc ePilo tDISTRONI Cis deactivated (Ypage 176).
If it was no tdeactivated by th edriver , awarning tone also sounds.
Display messages249
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
Distance Pilot NowAvailableDistancePilo tDISTRONI Cis operational again after having been tem-
porarily unavailable .You can no wreactivat eDistanc ePilo t
DISTRONI C (
Ypage 173).
Distance Pilot Cur ‐rently UnavailableSee Operator'sMan ‐ual
Distanc ePilo tDISTRONI Cis temporarily inoperative.
Steering Pilo tis also temporarily 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 sof electromagneti cradiation .
RThe system is outside th eoperating temperature range.
RThe on-boar dvoltag eis to olow.
A warning tone also sounds.
Whe nth ecauses state dabov eno longer apply, th edisplay message
disappears.
Distanc ePilo tDISTRONI Cis operational again .
If th edisplay message does no tdisappear :
XPull overand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions.
XSecur eth evehicl eagainst rollin gaway (Ypage 161).
XRestart th eengine.
DistancePilotInop‐erativ eDistanc ePilo tDISTRONI Cis malfunctioning .
The followin gmay hav ealso failed:
RActive Brake Assis twit hcross-traffic function
RSteering Pilo t
A warning tone also sounds.
XVisit aqualified specialist workshop .
Distance Pilot Sus‐pendedYou havedepressed th eaccelerato rpedal .Distanc ePilo tDISTRONI C
is no longer controllin gth espeed of th evehicle.
XRemove your foo tfrom th eaccelerato rpedal .
Distance Pilot- - - mphAcondition for activating Distanc ePilo tDISTRONI Chas no tbeen met .
XCheckth eactivation condition sfor Distanc ePilo tDISTRONI C
(Ypage 173).
250Display messages
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
TirePressure Moni‐tor Inoperative NoWheel Sensor s
The wheels mounte ddo no thav e a suitable tire pressur esensor .The
tire pressur emonitor is deactivated.
XMoun twheels wit hsuitable tire pressur esensors.
The tire pressur emonitor is activated automatically after drivin gfor
a few minutes.
Tir ePress.Monito rInoperativeThe tire pressur emonitor is faulty.
XVisit aqualified specialist workshop .
Tires OverheatedThe tire temperature monitoring function is no tavailable in all vehi-
cles.
At least on etire has overheated. Affecte dtires are shown in red .At
temperatures close to th elimi tvalue ,th etires are shown in yellow .
XDrive moreslowly.
Tires Overheate dDecrease SpeedThe tire temperature monitoring function is no tavailable in all vehi-
cles.
At least on etire has overheated.
GWARNIN G
Overheated tires can burst, particularly at high speeds .
XDrive moreslowly so that th etires cool down .
Vehicle
Display messagesPossible causes/consequences and MSolutions
Shiftto'P'or'N'to Start EngineYou haveattempte dto start th eengin ewit hth etransmission in posi-
tion korh.
XShift th etransmission to position jori .
Apply Brake toShift fro m'P'You hav eattempte dto shift th etransmission to position h,kori
without depressing th ebrak epedal .
XDepress th ebrak epedal .
ToDeselectPorN,Depres sBrake andStart Engine
Wit hth eengin eswitched off ,you hav eattempte dto shift th etrans -
mission out of position jori intoanother transmission position .
XDepress thebrak epedal .
XStart th eengine.
To Engage Trans‐miss. Position RFirst DepresstheBrake
You hav eattempte dto shift from position hto position k.
XDepress thebrak epedal .
XShift th etransmission to position k.
254Display messages
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
StopVehicl eLeaveEngineRunnin gWaitTransmission Cool‐ing
The transmission has overheated. Pullin gaway can be temporarily
impaire dor no tpossible.
XPull ove rand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions. Do no tcontinu edrivin g
under any circumstances.
XLeav eth eengin erunning.
XWait until th edisplay message disappear sbefore pullin gaway.
NThe trunk lid is open .
XCloseth etrunk lid.
MThe hoo dis open . Awarning tone also sounds.
GWARNIN G
The open hoo dmay bloc kyour vie wwhen th evehicl eis in motion .
There is aris kof an accident.
XPull ove rand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions.
XSecur eth evehicl eagainst rollin gaway (Ypage 161).
XCloseth ehood.
CAt least on edoor is open . Awarning tone also sounds.
XClos eall th edoors.
_
Rea rLef tBackrestNot Latche dorRea rRight Backrest NotLatche d
Vehiclewit hthrough-loading feature in th erear bench seat :
The backrest in th erear is no tengage don th eleft-han dand/o rright -
han dside .
XPush th ebackrest bac kuntil it engages.
_
Rea rCenter Back‐res tNot Engage d
Vehiclewit hthrough-loading feature in th erear bench seat :
The center rear seat backrest is no tengaged.
XPush th ebackrest bac kuntil it engages.
256Display messages
On-board computer and displays