2017 MERCEDES-BENZ C-Class COUPE engine

Display messagesPossible causes/consequences andMSolutions
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CoolantToo HotStopVehicl eTurnEngine Off
The coolan tistoohot .
Aw arning tone also sounds.
GWARNIN G
Do no tdrive when your engin eisoverheated. This can caus esom e
fluids whic hmay hav eleaked int othe engin ecom partmen ttocatch
fire.
Steam from th eoverheate denginec an also caus eserious burn swhich
can occur jus tbyopening th ehood.
There is ariskofi njury.
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 152).
XWait until th eengineh as cooled down .
XMakesuret hatthe air supply to th eenginer adiato risnotblocked,
e.g. by snow, slus horice.
XDo no tstart th eenginea gain until th edisplay message goe sout and
th ec oolan ttem perature is belo w248‡(120† ). Otherwise ,the
engin ecould be damaged.
XPay attention to th ecoolan ttem perature display.
If th etemperatur eincreases again:
XVisit aqualified specialist workshop immediately.
Under normal operating condition sand wit hthe specified coolan t
level, th ecoolan ttem perature may ris eto2 48 ‡(120† ).
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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 152).
XConsult aqualified specialist workshop .
Display messages233
On-boardc omputer andd isplays
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Display messagesPossible causes/consequences andMSolutions
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StopVehicl eSeeOperator' sManual
The battery is no longer bein gcharged and th ebattery charg elevel is
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 152).
XObserv ethe instruction sinthe# See Operator' sManualdisplay message .
XConsultaqualified specialist workshop .
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StopVehicl eLeaveEngine Runnin g
The battery charg elevel is to olow.
XPull ove rand stop th evehicl esafely as soo naspossible, payin g
attention to roa dand traffic conditions. Do no tcontinue driving
under any circumstances.
XLeav ethe engin erunning.
XWait until th edisplay message disappear sbefore pullin gaway.
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Start Engine SeeOperator' sManual
The engin eisswitched off and th ebattery charg elevel is to olow.
XSwitc hoff electrical consumer sthaty ou do no tneed, suc hasthe
rear window defroste rand interior lighting .
XLeavethe engin erunnin gfor afew minute sordrivealon gd istance.
The battery is bein gcharged.
4
CheckEngineOilAtNex tRefueling
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 289).
XIf necessary, add engin eoil(Ypage 289).
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 aqualified
specialist workshop or on th eInterne tath ttp:// bevo.mercedes -
benz.com.
234Display messages
On-boardc omputer andd isplays

Display messagesPossible causes/consequences andMSolutions
4
Check Engine OilLevel (Add1quart)
The engin eoil level has dropped to th eminimum level.
!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 289).
XIf necessary, add engin eoil(Ypage 289).
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 aqualified
specialist workshop or on th eInterne tath ttp:// bevo.mercedes -
benz.com.
4
Engine Oil LevelLow Sto pVehicl eTurnEngine Off
The engin eoil level is to olow. There is ariskofe ngined amage.
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 152).
XChec kthe engin eoil level (Ypage 289).
XIf necessary, add engin eoil(Ypage 289).
8
Fue lLevel Low
The fuel level has dropped int othe reserv erange.
XRefue lattheneares tgas station .
CThere is only averys mall amount of fuel in th efuel tank.
XRefue lattheneares tgas station without fail .
8
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 .
Display messages235
On-boardc omputer andd isplays
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Display messagesPossible causes/consequences andMSolutions
LaneKeepin gAssistCurrently Unavaila‐ble See Operator' sManualorActiveLan eKeepin gAssistCurrently Unavaila‐ble See Operator' sManual
LaneKeepin gAssistorA ctiveLaneK eepin gAssistisd eactivated and
temporarily inoperative.
Possibl ecauses are:
Rthew indshield 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.
Rthel an em arking sare worn, dark or covered, e.g. by dir torsnow.
Whe nthe causes state dabov enol onger apply, th edisplay message
disappears.
Lan eKeepin gAssistorA ctiveLaneK eepin 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 152).
XClean th ewindshield.
Lan eKeepin gAssistInoperativeor
ActiveLan eKeepin gAssist Inoperative
LaneKeepin gAssistorA ctiveLaneK eepin gAssistisd efective.
XVisit aqualified specialist workshop .
Blind SpotAssistCurrently Unavaila‐ble See Operator' sManualorActiveBlind Spo tAssistCurrently Unavaila‐ble See Operator' sManual
Blind Spot AssistorActiveBlind Spot Assis tistemporarily inoperative.
Possibl ecauses are:
Rther adar sensor system is outside th eoperating temperature
range.
Rth er adar sensor system is temporarily inoperative, e.g. due to elec -
tromagneti cradiation emitted by nearby TV or radi ostation sor
other source sofelectromagneti cradiation .
Whe nthe causes state dabov enol onger apply, th edisplay message
disappears.
Blind Spot Assis torActiveBlind 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 152).
XRestart th eengine.
Blind Spo tAssistInoperativeor
Active Blind Spo t
Assist Inoperative
Blind Spot AssistorActiveBlind Spot Assis tisdefective.
XVisit aqualified specialist workshop .
ParkAssistCanceledThe driver's door is open .
XRepeat theparking gap measuremen tand parking process wit hthe
driver's door closed .
Display messages237
On-boardc omputer andd isplays
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Display messagesPossible causes/consequences andMSolutions
You touched themultifunction steering whee lwhile steering inter-
vention was active .
XWhilesteering intervention is active ,makes uret hatthe multifunc-
tion steering whee lisnottouched unintentionally.
The vehicl ehas started to skid and ES P®has intervened.
XUse Active Parking Assistagain later (Ypage 177).
ParkAssist Inoper ‐ativePARKTRONICism alfunctioning or faulty.
XFollow th einstruction sand helpful hints in th e"Problem swith
PARKTRONIC" section (Ypage 177).
If th emultifunction display still shows th edisplay message :
XVisitaqualified specialist workshop .
Active Parking Assistisunavailable or faulty.
XSwitc hoff th eignition and restar tthe engine.
If Active Parking Assis tcontinue stobeu navailable (the jsymbol
does no tappear in th emultifunction display):
XVisit aqualified specialist workshop .
ParkAssistSwitched OffThe vehicl eisparked. Awarning tone also sounds.
The display message disappear sautomatically.
Traffi cSignAssistCurrently Unavaila‐ble See Operator' sManual
Traffic SignAssistist emporarily inoperative.
Possibl ecauses are:
Rthew indshield 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 fully operational, th edisplay
message disappears.
Traffic Sig nAssistiso perational again .
TrafficSignAssistInoperativeTraffic Sig nAssistisf aulty.
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 169).
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 169).
DISTRONIC PLU SOffDISTRONI CPLUSh as been deactivated (Ypage 162).
If it was no tdeactivated by th edriver ,aw arning tone also sounds.
238Display messages
On-boardc omputer andd isplays

Display messagesPossible causes/consequences andMSolutions
DISTRONIC PLUSNowAvailableDISTRONI CPLUSiso perational again after having been temporarily
unavailable .You can no wreactivat eDISTR ONICPLUS(Ypage 162).
DISTRONIC PLU SCur‐rently UnavailableSee Operator' sMan‐ual
DISTRONI CPLUSist emporarily inoperative.
Steering Assis tand Stop&Go Pilo tare temporarily inoperative.
Possibl ecauses are:
Rther adar sensor system is temporarily inoperative, e.g. due to elec -
tromagneti cradiation emitted by nearby TV or radi ostation sor
other source sofelectromagneti cradiation .
Rthes ystem is outside th eoperating temperature range.
Rtheo n-bo ardv oltag eistoolow.
Aw arning tone also sounds.
Whe nthe causes state dabov enol onger apply, th edisplay message
disappears.
DISTRONI CPLUSiso 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 152).
XRestart th eengine.
DISTRONICPLU SInop‐erativ eDISTRONI CPLUSisd efective.
The followin gmay hav ealso failed:
RBASP LUSw ithC ross-Traffic Assis t
RPRE-SAFE®Brake
RSteering Assis tand Stop&Go Pilo t
Aw arning tone also sounds.
XVisit aqualified specialist workshop .
DISTRONIC PLUSSus‐pendedYou hav edepressed th eaccelerato rpedal .DISTR ONICPLUSisn o
longer controllin gthe speed of th evehicle.
XRemove your foo tfromt heaccelerato rpedal .
DISTRONIC PLU S---mphAn activation condition for DISTRONI CPLUSisn otfulfilled .
XCheckthe activation condition sfor DISTRONI CPLUS(Ypage 162).
Display messages23 9
On-boardc omputer andd isplays
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Display messagesPossible causes/consequences andMSolutions
TirePressure Moni‐tor Inoperative NoWheel Sensor s
The wheels mounte ddonothav eas uitable 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
af ew minutes.
Tir ePress.Monito rInoperativeThe tire pressur emonitor is faulty.
XVisit aqualified specialist workshop .
Vehicle
Display messagesPossible causes/consequences and MSolutions
Shiftto'P'or'N'to Start EngineYou haveattempte dtostart th eenginew itht he transmission in posi-
tion Ror D.
XShift th etransmission to position Por N.
Apply Brake toShift fro m'P'You hav eattempte dtomovet he transmission selector lever to posi-
tion D,Ror Nwithout depressing th ebrak epedal .
XDepress th ebrak epedal .
ToDeselect PorN,DepressBrake andStart Engine
Withthe engin eswitched off ,you hav eattempte dtoshift th etrans -
mission out of position Por Nint oa nother transmission position .
XDepress thebrak epedal .
XStart th eengine.
TransmissionNotinPR iskofV ehicleRollin gAway
The driver's door is open or no tfully closed and th etransmission is in
position R,N or D.
Aw arning tone also sounds.
GWARNIN G
The vehicl emay rol laway.
There is ariskofana ccident.
XShift thetransmission to position P.
XSecurethe vehicl eagainst rollin gaway (Ypage 152).
XClosethe driver's door completely.
Onl yShift to 'P'whenVehicl eisSta‐tionar y
The vehicl eismoving.
XPull ove rand stop th evehicl esafely as soo naspossible, payin g
attention to roa dand traffic conditions.
XShift th etransmission to position P.
Display messages243
On-boardc omputer andd isplays
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Display messagesPossible causes/consequences andMSolutions
Â
Don't Forget YourKey
The SmartKey is notintheignition lock. You hav eopened th edriver's
door wit hthe engin eswitched off .
This display message is displayed for amaximum of 60 seconds and is
simply areminder.
XTak ethe SmartKey wit hyou when you leav ethe vehicle.
Â
Key Not Detected(whit edisplay message )
The SmartKey is currentl yundetected.
XChange th elocation of th eSmartKey in th evehicle.
If th eSmartKey still canno tbedetected:
XInsertthe SmartKey int othe ignition loc kand tur nittot hedesire d
position .
Â
Key Not Detected(redd isplay message )
The SmartKey is no tinthevehicle.
Aw arning tone also sounds.
If th eengineiss witched off ,you can no longer loc kthe vehicl ecen-
trally or start th eengine.
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 152).
XLocate th eSmartKey.
XPress aon thesteering whee ltoc onfir mthedisplay message .
Becausethe re is interferenc efromas tron gs ource of radi owaves, th e
SmartKey is no tdetecte dwhilstthe engin eisrunning.
Aw arning tone also sounds.
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 152).
XInser tthe SmartKey int othe ignition loc kand bring int okeymode.
Â
Remove 'Start 'But‐ton and Insert Key
The SmartKey is continually undetected.
The SmartKey detection function has atem porar ymalfunction or is
faulty. Awarning tone also sounds.
XInser tthe SmartKey int othe ignition loc kand tur nittot hedesire d
position .
XVisitaqualified specialist workshop .
Warning and indicat orlamps in th einstrume nt cluster
Generaln otes
Some systems carry out aself-diagnosis when th eignition is switched on .Therefore ,som eindicator
and warning lamp smay ligh tuporf lashtem porarily. This behavio risnon-criti cal.These indicator
and warning lamp sonlyi ndicat eamalfunction if they ligh tuporflasha fter starting th eengineo r
whils tdriving.
246Warning andi ndicator lampsint he instrument cluster
On-board computera nd displays