Lights
Display messagesPossible causes/consequences andMSolutions
b
Example:CheckL eftLow Beam
The bulb in question is malfunctioning.
XVisitaqualifie dspecialist workshop.
or
XCheckw hether you are permitted to replacet hebulb yourself
(Ypage 88).
iLEDl ight sources :the display message for th ecorresponding
lamp onl yappearsw hen all th eLEDsint helamp have failed.
b
Malfunction SeeOperator'sM anual
The exteriorlighting is malfunctioning.
XVisit aqualifie dspecialist workshop.
b
AutoL ampFunctionInoperative
The light sensor is defective.
XVisitaqualifie dspecialist workshop.
b
Switch Off Lights
The lightsa re still switche donwhen you leave th evehicle .Awarning
tone also sounds.
XTurn th elight switch to position Ã.
Engine
Display messagesPossible causes/consequences and MSolutions
+
CheckCoolantLevelSee Operator'sMan‐ual
The coolant level is to olow.
XAdd coolant ,observingt hewarning notes before doings o
(Ypage 229).
XHav ethe coolant system checked at aqualifie dspecialist workshop
if th ecoolant needs toppingupm oreo ften than usual.
?The fan motor is malfunctioning.
XAt coolant temperatures below drivetot he nearest
qualified specialist workshop.
XAvoid heavy loads on the engine as you do so, e.g. driving in moun-
tainou sterrai nand stop-start traffic.
176Display messages
On-board computer and displays
the marking
H,
Display messagesPossible causes/consequences andMSolutions
?
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 120).
XLeav ethe vehicl eand keep asafed istanc efromt hevehicl euntil th e
engin ehas 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 w
Otherwise,the
engin ecould be damaged.
XPay attention to th ecoolan ttem perature gauge .
XIf thetem perature increases again ,visit aqualified specialist work-
sho pimmediately.
Under normal operating condition sand wit hthe specified coolan t
level, th ecoolan ttem perature may ris eto
The poly-V-belt may hav etorn.
XPull ove rand stop th evehicl esafely and switch off th eengine, pay-
ing attention to roa dand traffic conditions.
XChec kthe poly-V-belt .
If th epoly-V-belt is torn:
!Do no tcontinue driving. The engin ecould otherwise overheat.
XConsult aqualified specialist workshop .
If th epoly-V-belt is not damaged :
XWait until thedisplay message disappear sbefore restarting th e
engine. Otherwise ,the engin ecould be damaged.
XPay attention to th ecoolan ttem perature gauge .
XVisitaqualified specialist workshop .
Display messages177
On-boardc omputer andd isplays
Z
the marking
H
the marking
H.
.
Display messagesPossible causes/consequences andMSolutions
Blind SpotAssistCurrently Unavaila‐ble
See Operator' sMan‐ual
Blind Spot Assis tistemporarily inoperative. Possibl ecauses are:
Ryou hav eestablished th eelectrical connection between th etrailer
and your vehicle.
Rth es ensor sare dirty
Rfunction is impaire ddue to heav yrain or snow
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
The yellow 9indicator lamp salso ligh tupint heexterio rmirrors.
XWhe ntow ingat railer ,confir mthedisplay message wit ha.
If you are drivin gwithout atrailer and th edisplay message does no t
disappear :
XPull overand stop th evehicl esafely as soo naspossible, payin g
attention to roa dand traffic conditions.
XApply th eparking brake.
XClean th esensor s(Ypage 234).
XRestart th eengine.
If th esystem detects that th esensor sare full yoperational, th edisplay
message disappears.
Blind Spot Assis tisoperational again .
Blind SpotAssist
Inoperative
Blind Spot Assis tisfaulty.
The yellow 9indicator lamp salso ligh tupint heexterio rmirrors.
XVisit aqualified specialist workshop .
DISTRONIC PLUS
Off
DISTRONICPLUSh as been deactivated (Ypage 132).
If it was deactivated automatically, awarning tone also sounds.
DISTRONIC PLU S
Now Available
DISTRONICPLUSiso perational again after having been temporarily
unavailable .You can no wreactivat eDISTR ONICPLUS(Ypage 132).
Display messages18 1
On-boardc omputer andd isplays
Z
Display messagesPossible causes/consequences andMSolutions
DISTRONIC PLUS
Currently Unavaila‐ble See Operator' sManual
DISTRONICisdeactivated and temporarily inoperative. Possibl ecau-
ses are:
Rth eD ISTR ONICPLUSc over in th eradiato rtrimisd irty
Rfunction is impaire ddue to heav yrain or snow
Rthes ensor sinthebumpers are dirty.
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
Rthet ransfer cas eisintheLOW RANGE transmission position .
Rthev ehicl eisonanu phillorad ownhill slop eofmoret han
22‑25 %
Rtheo n-bo ardv oltag eistoolow.
Aw arning tone also sounds.
If th edisplay message does no tdisappear :
XPull overand stop th evehicl esafely as soo naspossible, payin g
attention to roa dand traffic conditions.
XApply th eparking brake.
XClean th eDISTR ONICPLUSc over in th eradiato rtrima nd th e
bumper (Ypage 234).
XRestart th eengine.
If th esystem detects that th esensor sare full yoperational, th edisplay
message disappears.
DISTRONI CPLUSiso perational again .
DISTRONIC PLU S
Inoperative
DISTRONICPLUSism alfunctioning
BA S(anti-lock braking system) may also hav efailed.
Aw arning tone also sounds.
XVisit aqualified specialist workshop .
DISTRONIC PLUS
Suspended
You havedepressed th eaccelerato rpedal .DISTR ONICPLUSisn o
longer controllin gthe speed of th evehicle.
XRemove your foo tfromt heaccelerato rpedal .
DISTRONIC PLU S
---mph
An activation condition for DISTRONI CPLUSisn otfulfilled .
XCheckthe activation condition sfor DISTRONI CPLUS(Ypage 132).
Cruise Contro l
---mph
Aconditi on for activating cruise control has no tbeen fulfilled .
You hav etried to store aspeed belo w20m ph(30 km/ h),for example.
XIf condition spermit,d rive faster than 20 mph (30 km/ h)and store
th es peed.
XCheckt heactivation conditionsf or cruise control (Ypage 131).
182Displaymessages
On-boardc omputer and displays
Display messagesPossible causes/consequences andMSolutions
WarningTireM al‐functionThe tire pressur einoneor mor etires has dropped suddenly. The whee l
position is shown in th emultifunction display.
Aw arning tone also sounds.
GWARNIN G
Drivin gwithaf lat tire poses ariskoft hefollowin ghazards :
Raflat tire affects th eabilit ytos teer or brak ethe vehicl e
Ryou could lose control of th evehicl e
Rcontinued drivin gwithaf lat tire will caus eexces sive heat build-up
and possibl yafire
There is ariskofana ccident.
XStop thevehicl ewithout making any sudden steering or braking
maneuvers .Pay attention to th etraffic condition sasyou do so.
XSecur ethe vehicl eagainst rollin gaway (Ypage 120).
XIf there is aflat tire, inspec tthe tires (Ypage 240).
PleaseCorrec tTirePressureThe tire pressur eistoolow in at least on eofthetires ,ort hetire
pressur edifference between th ewheels is to ogreat.
XChec kthe tire pressures at th enexto pportunity (Ypage 257).
XIf necessary, correc tthe tire pressure.
XRestart th etirep ressur emonitor (Ypage 259).
TirePress .Sen‐sor(s) Missin gThere is no signal from th etirep ressur esensor of on eorseveral
wheels. The pressur eoftheaffecte dtired oes no tappear in th emul-
tifunction display.
XHav ethe fault ytirep ressur esensor replace dataqualified special -
ist workshop .
TirePress.Monito rCurrently Unavaila‐ble
Becausethere is interferenc efromas tron gs ource of radi owaves, no
signals from th etirep ressur esensor sare detected. The tire pressur e
monitor is temporarily malfunctioning .
XDrive on.
The tire pressur emonitor restarts automatically as soo nasthe
problem has been resolved.
184Display messages
On-boardc omputer andd isplays
Vehicle
Display messagesPossiblecauses/consequences and MSolutions
Shiftto'P'or'N'to Start EngineYouh avea ttempte dtostart the engine with the transmission in posi-
tion Ror D.
XShift the transmission to position Por N.
Auxiliary BatteryMalfunctionThe auxiliary battery for the automatic transmission is no longer being
charged.
XVisit aquali fied specialist workshop at the next opportunity.
XUntil then, set the automatic transmission to position Pbefore you
switch off the engine.
XBefore leaving the vehicle, appl ythe parking brake.
Apply Brake toShift from' P'Youh avea ttempte dtomove the transmission selecto rlev er to posi-
tion D,R or Nwithou tdepressing the brake pedal.
XDepres sthe brake pedal.
Apply Brake toSelect RYo uh avea ttempte dtoshift from position Dto position Rwithout
applying the brake.
XDepres sthe brake pedal.
XShift the transmission to position R.
AThe reardooriso pen.
GWARNING
Whe nthe engine is running ,exhaus tgases can enter the vehicl einte-
rio rift he tailgate is open.
There is ariskofp oisoning .
XClose the reard oor.
?The hoo disopen.
GWARNING
The open hoo dmay block your vie wwhent he vehicl eisinmotion.
There is ariskofana ccident.
XPull overa nd stop the vehicl esafelyass oonaspossible, paying
attentio ntoroada nd traffic conditions.
XSecure the vehicl eagain st rolling away (Ypage 120).
XClose the hood.
CAt leas tone door is open.
Aw arning tone also sounds.
XClose al lthe doors.
186Display messages
On-board computer and displays
Engine
Warning/
indicator
lampNSignaltype
Possible causes/consequences and M
Solutions
;NThe yellow CheckE nginew arning lamp lightsupw hile theengine is running.
Therem ay beamalfunction, for example:
Rin th eengine management
Rin th efuel injection system
Rin th eexhaust system
Rin th eignition system
Rin th efuel system
The emission limit values may be exceeded and th eengine may be in emergency
mode.
XVisitaq ualified specialist workshop immediately.
In somes tates, you must immediately visi taqualified specialist workshop as soon
as th eyellow CheckE nginew arning lamp lightsu p. This is due to thelegal require-
ments in effect in these states. If in doubt,c heck whether suchl egal regulations
apply in th estate in whichy ou are currently driving.
8NThe yellow reservef uel warning lamp lightsupw hile theengine is running.
The fuel leve lhas dropped int othe reserver ange.
XRefuel at th enearest gas station.
8NThe yellow reservef uel warning lamp flashes while th evehicle is in motion.
In addition,t he; CheckE nginew arning lamp may light up.
The fuel fille rcap is no tclosed correctly or th efuel system is leaking.
XCheckt hatthe fuel fille rcap is correctly closed.
XIf th efuelfiller cap is not correctly closed: close thefuel fille rcap.
XIf th efuelfiller cap is closed: visitaq ualified specialist workshop.
?NThe red coolant warning lamp lightsupw hile theengine is runnin gand the
coolant temperatur egauge is at th estart of th escale.
The temperatur esensor for th ecoolant temperatur egauge is malfunctioning.
The coolant temperatur eisnolonger beingm onitored. Thereisar isk of engine
damag eifthecoolant temperatur eistoohigh.
XPull ove rand stop th evehicle safely and switch off th eengine ,payinga ttention
to road and traffic conditions. Do no tcontinue driving unde rany circumstances.
XSecure th evehicle against rolling away (Ypage 120).
XConsult aqualified specialist workshop.
194Warning and indicator lamps in th einstrumen tcluster
On-boardc omputer and displays
Warning/
indicator
lampNSignal type
Possiblec auses/consequences and M
Solutions
?NThe red coolant warning lamp comes on while the engine is running.
The coolant levelist oo low.
If the coolant levelisc orrect, the airflow to the engine radiator may be blocked or
the electric engine radiator fan may be defective.
The coolant is too hot and the engine is no longer being cooleds ufficiently.
XObserve the additionaldisplay messages in the multifunction display.
XPullover and stop the vehicles afelyand switch off the engine, paying attention
to road and traffic conditions.
XSecure the vehiclea gainst rolling away(Ypage120).
XLeave the vehiclea nd keepasafe distance from the vehicleu ntil the engine has
cooledd own.
XCheck the coolant levela nd add coolant, observing the warning notes
(Ypage2 29).
XIf you have to add coolant frequently, have the engine cooling system checked.
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 coolant temperature gauge is below the H
marking (Ypage1 58). Otherwise, the engine coul dbedamaged.
XDrive to the neares tqualified specialist workshop.
XAvoid heavy loads on the engine as you do so, e.g. driving in mountainous terrain
and stop-and-go traffic.
?N The red coolant warning lamp comes on while the engine is running.
The coolant temperature gauge has exceededt heHmarking (
Ypag e158) .The
airflow to the engine radiator may be blocked or the coolant levelm ay be too low.
GWARNING
The engine is not being cooleds ufficiently and may be damaged.
Do not drive when you rengine is overheated. This can caus esome fluids which
may have leaked into the engine compartment to catch fire.
Steam from the overheated engine can als ocaus eserious burns which can occur
just by opening the hood.
There is arisk of injury.
XObserve the additiona ldisplay messages in the multifunction display.
XPul lover and stop the vehicles afelyand switch off the engine, paying attention
to road and traffic conditions.
XSecure the vehiclea gainst rolling away(Ypage120).
XLeave the vehiclea nd keepasafe distance from the vehicleu ntil the engine has
cooledd own.
XCheck the coolant levela nd add coolant, observing the warning notes
(Ypage2 29).
XIf you have to add coolant frequently, have the engine cooling system checked.
XMake sure that the air supply to the engine radiator is not blocked,e .g. by snow,
slush or ice.
Warning and indicator lamps in the instrument cluster195
On-board computer and displays
Z