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Display messagesPossible causes/consequences andMSolutions
b
Highbea mright
The right high beam headlamp is fault y3.
XReplaceth ebulb as soo nas possibl e (Ypage 88).
b
Licenseplate lam p
Alicense plat elamp is fault y3.
XReplaceth ebulb as soo nas possibl e (Ypage 91).
b
Switch off lights
You haveforgotte nto switch off th elights when leaving th evehicle.
XTurn th eligh tswitch to $.
b
Foglampfront lef t
The left-han dfron tfog lamp is faulty.3
XHav eth ebulb replace das soo nas possibl eat aqualified specialist
workshop .
b
Foglampfront right
The right-hand fron tfog lamp is fault y3.
XHaveth ebulb replace das soo nas possibl eat aqualified specialist
workshop .
b
Rearfoglam p
The rear fog lamp is fault y3.
XReplaceth ebulb as soo nas possibl e (Ypage 90).
b
Parkinglam pfrontlef t
The fron tlef tparking lamp/standin glamp is fault y3.
XReplaceth ebulb as soo nas possibl e (Ypage 88).
b
Parkinglam pfrontright
The fron tright parking lamp/standin glamp is fault y3.
XReplaceth ebulb as soo nas possibl e (Ypage 88).
b
Reverselam p
Abackup lamp is fault y3.
XReplaceth ebulb as soo nas possibl e (Ypage 90).
b
Taillam plef t
The left-han dtai llamp is faulty.3
XReplac eth ebulb as soo nas possibl e (Ypage 90).
b
Taillam pright
The right-hand tai llamp is faulty.3
XReplac eth ebulb as soo nas possibl e (Ypage 90).
b
Marker lam p
Aperimete rlamp is faulty.3
XReplac eth ebulb as soo nas possibl e (Ypage 92).
3Dependin gon th eequipment, th ebulb-failure indicato rmay no tbe featured for any lamp sother than th etur n
signals.
Display messages18 3
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Display messagesPossible causes/consequences andMSolutions
Highbeam AssistinoperativeHighbeamAssis tis faulty.
XVisit aqualified specialist workshop .
HighbeamAssisttem‐porarily unavaila‐ble
Highbea mAssis tis deactivated and temporarily inoperative.
Possibl ecauses are:
RThe camera' sfunctionalit yis impaire ddue to heav yrain ,snow or
fog .
RThe windshield is dirty in th ecamera' sfield of vision .
XStop thevehicl epayin gattention to roa dand traffic conditions.
XSecur eth evehicl eto preven tit from rollin gaway (Ypage 127).
XClean th ewindshield (Ypage 231), particularly in th ecamera' s
field of vision .
If th emalfunction has been rectified, th eHighbeam Assist
available againmessage appears.
Engine
Display messagesPossible causes/consequences and MSolutions
Check DieselExhaustFluid SeeOperator' sManual
The DE Fsupply has dropped belo w1.5US gal (5. 5l).
XAd dDE Fsupply (Ypage 126).
The display message only disappear swhen th evehicl eis stationary,
at th elatest after 20 seconds, as soo nas you switch on th eignition
or start th eengin eafter refueling.
å
XX starts remaining
Three short warning tone salso sound.
Afte rth emessage appear sfor th efirst time, th eremaining DE Fsupply
will last for approximately 1200 mile s(1900 km). The engin ecan then
only be started another 16 times .
The number of remaining engin estart sxx
(16to 0)is shown in th e
message every time th eengin eis started.
XAd dat least 1. 5US gal (5.5l)of DEF (Ypage 126).
å
Idle Mode
The yellow ;Check Engine indicator lamp also lights up and three
short warning tones sound.
You cannot drive the vehicle at a speed exceeding 5 mph (8 km/h).
XAdd at least 1.5 US gal (5.5 l)of DEF (Ypage 126).
The display message and the yellow ;Check Engine indicator
lamp only disappear when the vehicle is stationary, at the latest
after 20 seconds as soon as you switch on the ignition or start the
engine after refueling.
Check DieselExhaust Fluid SeeOperator's Manual
In addition, the yellow ;DEF indicator lamp lights up and a warning
tone sounds.
The DEF reducing agent is contaminated, diluted or is not compliant
with ISO 22241.
XHave the DEF tank cleaned and refilled at a qualified specialist
workshop as soon as possible.
184Display messages
On-board computer and displays
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Display messagesPossible causes/consequences andMSolutions
å
XX starts remaining
The yellow; CheckEngin eindicator lamp also lights up and three
short warning tone ssound.
Afte rth emessage appear sfor th efirst time, th eremaining DE Fsupply
will last for approximately 1200 mile s(1900 km). The engin ecan then
only be started another 16 times .
The number of remaining engin estart sxx
(16to 0)is shown in th e
message every time th eengin eis started.
The DE Freducin gagen tis contaminated, diluted or is no tcomplian t
wit hIS O 22241.
The exhaust gas aftertreatmen tis malfunctioning or an emission rel -
evan tmalfunction has occurred .This malfunction or defec tcan dam-
age th eexhaust gas aftertreatment.
XVisit aqualified specialist workshop immediately.
å
Idl eMod e
The yello w; CheckEngin eindicator lamp also lights up and three
short warning tone ssound.
The vehicl ecanno tbe driven at aspeed exceedin g 5mph (8 km/h).
XVisit aqualified specialist workshop immediately.
?
Coolan tStop, tur nengine off
The coolanttemperature is to ohigh .
If th evehicl eis stoppe dafter bein gsubjecte dto extreme loads ,th e
coolan twarning lamp may come on when th eignition is switched on
or th eengin eis restarted. Suc hloads can be, for example, drivin gin
mountainous terrain or drivin gwit h a trailer .
XRun th eengin efor approximately 1minute at idlin gspeed.
XConsult aqualified specialist workshop if th edisplay message con-
tinue sto be shown.
*
Check coolan tlevel
The coolan tlevel is to olow.
Never run th eengin eif th ecoolan tlevel is to olow. The engin ecould
overheat and be damaged.
XStop th evehicl eas soo nas possible, payin gattention to roa dand
traffic conditions.
XSwitc hoff th eengin eand let it cool down .
XAddcoolan tand be sur eto observ eth ewarning note s
(Ypage 280).
XIf you need to add coolan tfrequently, hav eth eengin ecoolin gsys-
te m checke dat aqualified specialist workshop .
7
Reservefue lDriveto agas statio n
The fuel level has fallen int oth ereserv erange.
XRefue lat th eneares tgas station (Ypage 124).
:
WaterinfuelVisitworkshop
The water that has collecte din th ewater separator has reached th e
maximum level.
XDrain th ewater separator (Ypage 220).
Display messages185
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Display messagesPossible causes/consequences andMSolutions
m
Fuelfilter Visitworkshop
The fuel filter is dirty.
XHav eth efuel filter elemen treplace das soo nas possibl eat aquali-
fie dspecialist workshop .
4
Engine oil Add 1.0quart(Canada: 1.0liter)
The oil level is toolow.
XChec kth eoil level th enext time you refuel (Ypage 216), and add
oil.
4
Engine oil levelNot whe neng .run ‐ning
You wan tto chec kth eengin eoil level eve nthough th eengin eis still
running.
XSwitc hoff th eengine.
XChec kth eoil level (Ypage 216).
4
Engine oil levelReduce oil level
You haveadded to omuc hengin eoil. There is aris kof damaging th e
engin eor catalytic converter.
XChec kth eoil level (Ypage 216).
XIf theoil level is to ohigh :hav eth eengin eoil extracted at th enext
qualified specialist workshop .
XIf theoil level is correct: hav eth emalfunction rectifie dat th enext
qualified specialist workshop .
4
Engine oil levelStop, turnengineoff
There is no tenough or no oil in th eengine. There is adanger of engin e
damage.
XStop th evehicl eas soo nas possible, payin gattention to roa dand
traffic conditions.
XChec kth eoil level wit hth eoil dipstick (Ypage 217).
XIf theengin eoil level is correct: hav eth emalfunction rectifie d
immediately at aqualified specialist workshop .
XIf theengin eoil level is to olow: hav eth evehicl etowed to aqualified
specialist workshop .
4
Oil sensor Visitworkshop
There isamalfunction in th eengin eoil level display.
XHav eth evehicl echecke dimmediately at aqualified specialist
workshop .
Driving systems
Display messagesPossible causes/consequences and MSolutions
_ _ _
Cruise control
The activation condition sfor cruise control hav eno tbeen met .
You can only activat ecruise control from speeds of 20 mph
(30 km/h).
Cruise contro l
Visit workshop
Cruisecontrol has been deactivated due to amalfunction .
XHavecruise control checke dat aqualified specialist workshop .
186Display messages
On-board computer and displays
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Display messagesPossible causes/consequences andMSolutions
LaneKeep. AssistTemporarilyUnavailable
and th eà indicator lamp lights up yellow.
Lan eKeepin gAssis tis deactivated and temporarily inoperative.
Possibl ecauses are:
RThere are no lan emarking spresent.
RThe camera' sfunctionalit yis impaire ddue to heav yrain ,snow or
fog .
RThe camera canno trecogniz eth eroa dmarkings:
-It is to odark .
-The lan emarking sare wor nor are covered, for example, by dir tor
snow.
RThe windshield is dirty in th ecamera' sfield of vision .
XStop thevehicl epayin gattention to roa dand traffic conditions.
XSecur eth evehicl eto preven tit from rollin gaway (Ypage 127).
XClean th ewindshield (Ypage 231), particularly in th ecamera' s
field of vision .
If th eà indicator lamp goe sout ,Lan eKeepin gAssis tis opera-
tional again .
LaneKeep. AssistInoperativeLan eKeepin gAssis tis faulty.
XHav eLan eKeepin gAssis tchecke dat aqualified specialist work-
shop.
Blind Spo tAssistInoperativeBlind Spot Assis tis faulty.
XHav eBlind Spot Assis tchecke dat aqualified specialist workshop .
Collision Preven‐tionAssist Inoper ‐ative
COLLISION PREVENTION ASSIST is faulty.
XHaveCOLLISION PREVENTION ASSIST checke dat aqualified spe -
cialist workshop .
Recognition by th eradar sensor system can be impaire din th ecas eof:
Rdir ton th esensor sor anythin gelse covering th esensor s
Rsnow or heav yrain
Rinterferenc efrom other radar source s
Rthere are strongradar reflections, for exampl ein parking garages
Ranarrow vehicl etraveling in front, e.g. amotorbik e
Ravehicl etraveling in fron ton adifferen tlin e
XClean th eradar sensor system area .
Intervention Cross‐windAssistThe d indicator lamp also flashes in th einstrumen tcluster.
Crosswin dAssis thas intervened perceptibly.
Display messages18 7
On-board computer and displays
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Tires
Display messagesPossible causes/consequences andMSolutions
Tire pres. Adjustpres.
O
The pressure is insufficient in one or more tires, or the pressures of the
individual tires differ significantly.
XCheck the tire pressure at the next opportunity and correct it if
necessary (Ypage 249).
Tire pres.
monitor inoperative
The tire pressure monitor has malfunctioned.
XHave the tire pressure monitor and the wheels checked at a quali-
fied specialist workshop.
Tire pres.
monitor currentlyunavailable
The tire pressure monitor function is temporarily unavailable due to
radio interference or undervoltage.
XOnce the causes have been remedied, the tire pressure monitor is
automatically activated.
Tire pres.-
monitorinoperativeNo wheel sensors
The tire pressure monitor is not receiving signals from one or more
wheels because:
Ra wheel has been replaced with the spare wheel without wheel
electronics.
Rthe maximum temperature on one of the wheel electronics units has
been exceeded.
Rthe wheel electronics are malfunctioning.
XHave the tire pressure monitor and the wheels checked at a quali-
fied specialist workshop.
Check tire(s)
O
The pressure of one or more tires has dropped significantly. If the tire
pressure monitor has detected the affected wheel, the wheel position
is also displayed.
XStop the vehicle as soon as possible, paying attention to road and
traffic conditions.
XCheck the tires.
XRepair or change the wheel if necessary (Ypage 262).
XCheck the tire pressure and correct it if necessary (Ypage 249).
The display message disappears automatically after driving for a
few minutes with the corrected tire pressure.
Warning Tire defect
O
One or more tires is losing air rapidly. If the tire pressure monitor has
detected the affected wheel, the wheel position is also displayed.
XStop the vehicle without making any sudden steering or braking
maneuvers, paying attention to the traffic conditions as you do so.
XRepair or change the wheel (Ypage 262).
188Displa y messages
On-board computer and displays
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Vehicle
Display messagesPossible causes/consequences andMSolutions
Ð
SteeringAssistanceFailure
The power assistance for the steering has malfunctioned. You need to
steer more forcefully.
XCarefully continue to a qualified specialist workshop and have the
steering checked immediately.
#
Battery/AlternatorVisit workshop
The battery is not being charged. Possible causes are a defective
alternator or a torn poly-V-belt.
XStop the vehicle as soon as possible, paying attention to road and
traffic conditions.
XCheck the poly-V-belt.
XIf the poly-V-belt is torn: do not continue driving. Consult a qualified
specialist workshop.
XIf the poly-V-belt is not damaged: have the vehicle checked as soon
as possible by a qualified specialist workshop.
÷
Electrically oper‐ated step
The electrical step has retracted or extended only partially or not at all.
XMake sure there is sufficient free space for the electrical step.
XOpen or close the sliding door again.
XIf the electrical step still does not extend or retract fully, push the
step in manually (Ypage 66). Before stepping out, remind the pas-
sengers that the step is missing.
1
Hood open
You are already driving at walking pace, even though the hood is not
closed.
XClose the hood.
9
Please enter PIN:
You have not yet entered your PIN in the mobile phone.
XEnter the PIN for the SIM card.
1
Doors open
You are already driving at walking pace, even though not all the doors
are closed.
XClose the doors.
¦
Washer fluid Checklevel
The washer fluid level is too low.
XAdd washer fluid (Ypage 220).
Key
Display messagesPossible causes/consequences and MSolutions
+
Replace key Visitworkshop
The key is no longer working.
XVisit a qualified specialist workshop.
Display messages189
On-board computer and displays
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Indicator and warning lamps in the instrument cluster
When switching on theignition ,som esystems carry out aself-test .Some indicator and warning
lamp smay temporarily tur non or start to flash. This is no tan indication of any problem .Only when
these indicator and warning lights tur non or start flashin gafter th eengin ehas started or during th e
journey has amalfunction occurred .
ProblemPossible causes/consequences and MSolutions
·
The red distanc e
warning lamp
lights up while th e
vehicl eis in
motion .The distanc eto th evehicl ein fron tis to osmall for th espee dselected.
Increase th edistance.
·
The red distanc e
warning lamp
flashes while th e
vehicl eis in
motion .Addition -
ally, an intermit -
tent warning tone
sounds.You are approachin g avehicl eahead at to ohigh aspeed.
XBe prepare dto brak eimmediately.
XPay particular attention to th etraffic situation .You may hav eto
brak eor tak eevasive action .
Ã
The yellow Lan e
Keepin gAssist
indicator lamp
lights up while
you are driving .LaneKeepin gAssist is deactivated.
XActivat eLan eKeepin gAssist if necessar y (Ypage 144).
Ã
The green Lan e
Keepin gAssist
indicator lamp
lights up while
you are driving .LaneKeepin gAssist is operational.
Ã
The red Lan e
Keepin gAssist
indicator lamp
lights up while
you are driving .
Additionally, an
intermittent
warning tone
sounds.You are driving wit hth efron twhee lon alan emarking.
d
The yellow
ASR/ESP®warn-
ing lamp flashes
while th evehicl e
is in motion .GWARNING
ES P
®or AS Ris intervening because at least on eof th ewheels has
reached it stire gri plimit.
Cruis econtrol is deactivated for th eduration of th eintervention .
XAdapt your driving style to suit th eroad and traffic conditions. Do
no tuse to omuc hthrottle.
XDrive slowly.
190Indicator and warning lamps in the instrument cluster
On-board computer and displays