
Display messages on vehicles withoutsteering wheel buttons
Display messagesPossible causes/consequences an dMSolutions
_ _ _
V
The activation condition sfo rcruise contro lhav eno tbee nmet .
You can only activat ecruise contro lfrom speeds of 20 mph
(30 km/h).
or
Cruise contro lhas bee ndeactivated due to amalfunction .
XHavecruise contro lchecke dat aqualified specialis tworkshop .
NO TPMSTheNOmessag eis displaye dfo r30 seconds. The TPMSmessag eis also
displaye dafter 30 seconds.
The tire pressure monito rhas malfunctioned.
XHav eth etire pressure monito rand th ewheels checke dat aquali-
fie dspecialis tworkshop .
NO TPMSTheNOmessag eis displaye dfo r30 seconds. The TPMSmessag eis also
displaye dafter 30 seconds.
The tire pressure monito ris no treceivin gsignal sfrom on eor more
wheels because :
Rawhee lhas bee nreplaced wit hth espar ewhee lwithout whee l
electronics.
Rth emaximum temperature on on eof th ewhee lelectronic sunits has
bee nexceeded.
Rth ewhee lelectronic sare malfunctioning.
XHav ewheels wit hsuitable whee lelectronic sunits installed at a
qualified specialis tworkshop .
— —TPMSThe — —messag eis displaye dfo r30 seconds. The TPMSmessag eis
also displaye dafter 30 seconds.
The pressure is insufficien tin on eor more tires ,or th epressures of th e
individual tires diffe rsignificantly.
XChec kth etire pressure and correc tit if necessary (Ypage 253).
dEF ChkIn addition,th eyello wå DEFindicator lamp lights up in th einstru-
men tcluster and awarnin gtone sounds.
The DE Fsupply has dropped belo w1.5US gal (5.5l).
XAdd DEF supply (Ypage 129).
The å DEF indicator lamp only disappears when the vehicle is
stationary, at the latest after 20 secondsa s soon as you switch on
the ignition or start the engine after refueling.
In addition, the yellow ;Check Engine indicator lamp and the yel-
low å DEF indicator lamp light up in the instrument cluster 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.
178Display messages
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
StArtS RExxIn addition,th eyellow åDEFindicator lamp lights up and awarning
tone sequence sounds.
The DE Fsupply has dropped belo wthe0. 8US gal (3. 0l) reserv emark.
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 1)is shown in th e
message every time th eengin eis started.
XAd dat least 1. 5US gal (5. 5l) of DE F (Ypage 129).
The å DEFindicator lamp disappear safter no mor ethan
20 seconds after th evehicl ehas stoppe dor you hav eswitched on
th eignition or started th eengin eafter refueling.
In addition ,th eyellow ;CheckEngin eindicator lamp and th eyel-
low å DEFindicator lamp ligh tup in th einstrumen tcluste rand
three short warning tone ssound.
The DE Freducin gagen tis contaminated, diluted or is no tcomplian t
wit hIS O 2224 1.
The exhaust gas aftertreatment is malfunctioning or an emission rel-
evant malfunction has occurred. This malfunction or defect can dam- age the exhaust gas aftertreatment.
XVisit a qualified specialist workshop immediately.
¯
StArtS IdLE
In addition, the yellow åDEF indicator lamp and the ;Check
Engine indicator lamp light up in the instrument cluster and three
warning tones sound.
If the StArtS
IdLEmessage is displayed, 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 129).
The å DEF indicator lamp disappears after no more than
20 seconds after the vehicle has stopped or you have switched on the ignition or started the engine after refueling.
In addition, the yellow ;Check Engine indicator lamp and the yel-
low å DEF indicator lamp light up in the instrument cluster and a
warning tone sounds.
You cannot drive the vehicle at a speed exceeding 5 mph (8 km/h).
XVisit a qualified specialist workshop immediately.
Display messages179
On-board computer and displays
Z

Lights
Display messagesPossible causes/consequences andMSolutions
b
Low beam left
The left-hand low beam is faulty3.
XHalogen headlamps:replace the bulb as soon as possible
(Ypage 87).
XBi-Xenon headlamps: consult a qualified specialist workshop as
soon as possible.
b
Low beam right
The right-hand low-beam headlamp is faulty3.
XHalogen headlamps: replace the bulb as soon as possible
(Ypage 87).
XBi-Xenon headlamps: consult a qualified specialist workshop as
soon as possible.
b
Cornering lt. left
The left-hand cornering light is faulty3.
XReplace the bulb as soon as possible (Ypage 87).
b
Cornering lt. right
The right-hand cornering light is faulty3.
XReplace the bulb as soon as possible (Ypage 87).
b
Lights on auto‐matic. Remove key
The automatic headlamp feature is active: the light switch is in the
à position and you have forgotten to remove the key.
XRemove the key from the ignition lock.
b
Turn signal left
The left-hand turn signal is faulty.
XChange the bulb as soon as possible in the front (Ypage 88) or rear
(Ypage 89) indicator lamp.
b
Turn signal right
The right-hand turn signal is faulty.
XChange the bulb as soon as possible in the front (Ypage 88) or rear
(Ypage 89) indicator lamp.
b
Brake lamp left
The left brake lamp is faulty3.
XReplace the bulb as soon as possible (Ypage 89).
b
Brake lamp right
The right brake lamp is faulty3.
XReplace the bulb as soon as possible (Ypage 89).
b
Third brake lamp
The high-mounted brake lamp is faulty3. This display message will only
appear if all LEDs have failed.
XConsult a qualified specialized workshop as soon as possible.
b
High beam left
The left high-beam headlamp is faulty3.
XReplace the bulb as soon as possible (Ypage 87).
3Depending on the equipment, the bulb-failure indicator may not befeatured for any lamps other than the turn
signals.
Display messages185
On-board computer and displays
Z

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 130).
XClean th ewindshield (Ypage 235), 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
ExhaustFilter :
Drive at hig hengine speed. SeeOper. Manual
The automatic regeneration of th ediesel particl efilter is no tsufficien t
or has malfunctioned.
XDrive at an engin espeed of abov e2000 rpm until th edisplay mes -
sage disappears.
If th edisplay message does no tgo out after approximately
20 minutes, hav eth emalfunction rectifie dimmediately at aquali-
fie dspecialist workshop .
Check DieselExhaustFluid SeeOperator' sManual
The DE Fsupply has dropped belo w1.5US gal (5. 5l).
XAd dDE Fsupply (Ypage 129).
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 129).
Display messages187
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
å
IdleMod e
The yello w; CheckEngin eindicator lamp also lights up and three
short warning tone ssound.
You canno tdrive th evehicl eat aspeed exceedin g 5mph (8 km/h).
XAddat least 1. 5US gal (5.5l)of DEF (Ypage 129).
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.
å
XX starts remaining
The yellow ;Check Engine indicator lamp also lights up and three
short warning tones sound.
After the message appears for the first time, the remaining DEF supply
will last for approximately 1200 miles (1900 km). The engine can then only be started another 16 times.
The number of remaining engine starts xx
(16to 0) is shown in the
message every time the engine is started.
The DEF reducing agent is contaminated, diluted or is not compliant
with ISO 22241.
The exhaust gas aftertreatment is malfunctioning or an emission rel-
evant malfunction has occurred. This malfunction or defect can dam-
age the exhaust gas aftertreatment.
XVisit a qualified specialist workshop immediately.
å
Idle Mode
The yellow ;DEF indicator lamp also lights up and three short
warning tones sound.
The vehicle cannot be driven at a speed exceeding 5 mph (8 km/h).
XVisit a qualified specialist workshop immediately.
?
Coolant Stop, turnengine off
The coolant temperature is too high.
If the vehicle is stopped after being subjected to extreme loads, the
coolant warning lamp may come on when the ignition is switched on
or the engine is restarted. Such loads can be, for example, driving in
mountainous terrain or driving with a trailer.
XRun the engine for approximately 1 minute at idling speed.
XConsult a qualified specialist workshop if the display message con-
tinues to be shown.
188Display messages
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
9
Please enter PIN:
You haveno tyet entered your PIN in th emobile phone .
XEnterth ePIN for th eSI M card.
1
Doors ope n
You are already drivin gat walking pace, eve nthough no tall th edoor s
are closed .
XCloseth edoors.
¦
Washer fluid Checklevel
The washer flui dlevel is to olow.
XAd dwasher flui d (Ypage 224).
Key
Display messagesPossible causes/consequences and MSolutions
+
Replacekey Visitworkshop
The ke yis no longer working .
XVisitaqualified specialist workshop .
Indicatorand warning lamps in the instrume nt cluster
Whenswitching on th eignition ,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 espeed selected.
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 yello wLan e
Keepin gAssis t
indicator lamp
lights up while
you are driving.Lan eKeepin gAssis tis deactivated.
XActivat eLan eKeepin gAssis tif necessar y (Ypage 147).
Indicator and warning lamps in the instrument cluster193
On-board computer and displays
Z

ProblemPossible causes/consequences andMSolutions
6
The red warning
lamp does not go
out approx-
imately 4 seconds
after the ignition
is switched on, or
it lights up again.The restraint systems have malfunctioned.
GWARNING
If the restraint systems are malfunctioning, individual systems could
be triggered inadvertently or might not be triggered at all in the event
of an accident.
There is an increased risk of injury and accidents.
XDrive on with care.
XVisit a qualified specialist workshop immediately.
# The red battery
indicator lamp is
lit while the
engine is running.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 the near-
est qualified specialist workshop.
XIf the poly-V-belt is not damaged: have the vehicle checked as soon
as possible by a qualified specialist workshop.
#The red battery
indicator lamp is
lit while the
engine is running.The battery is faulty.
XStop the vehicle as soon as possible, paying attention to road and
traffic conditions.
XDo not continue driving under any circumstances.
XConsult a qualified specialist workshop.
#The yellow brake
pad wear indica-
tor lamp is lit after
the engine is star-
ted or while the
vehicle is in
motion.The brake pads/linings have reached their wear limit.
GWARNING
Braking performance can be impaired.
There is a risk of an accident.
XHave the brake pads/linings replaced as soon as possible at a
qualified specialist workshop.
4 The yellow engine
oil level warning
lamp is lit after
the engine is star-
ted or while the
vehicle is in
motion.The oil level has dropped to the minimum level.
XCheck the engine for oil loss.
XIf oil loss is detected: consult a qualified specialist workshop imme-
diately.
XIf no oil loss is detected: check the oil level and add engine oil
(Ypage 221).
198Indicator and warning lamps in the instrument cluster
On-board computer and displays

ProblemPossible causes/consequences andMSolutions
?
The red coolant
warning lamp is lit
while the engine
is running.The coolant temperature is too high.
If the vehicle is stopped after being subjected to extreme loads, the
coolant warning lamp may come on when the ignition is switched on
or the engine is restarted. Such loads can be, for example, driving in
mountainous terrain or driving with a trailer.
XRun the engine for approximately 1 minute at idling speed.
XConsult a qualified specialist workshop if the display message con-
tinues to be shown.
7
|The yellow
reserve fuel warn-
ing lamp is on. At
the same time,
0
appears in the
fuel tank content
display while the
engine is running,
although there is
fuel in the fuel
tank.
The fuel filler cap is not closed.
XClose the fuel filler cap.
You will hear a click when the fuel filler cap is closed fully.
XIf the malfunction continues to be displayed, have it rectified imme-
diately at a qualified specialist workshop.
;
The yellow Check
Engine indicator
lamp is lit up or
flashes while the
engine is running.You have used up all fuel in the tank.
The engine is running in emergency mode.
XRefuel at the nearest gas station (Ypage 127).
XBleed the fuel system (Ypage 123).
XStart the engine three to four times in succession after refueling.
Emergency running mode will be canceled. The vehicle does not
need to be checked.
;The yellow Check
Engine indicator
lamp is lit up or
flashes while the
engine is running.The injection control is malfunctioning.
The engine is running in emergency mode.
Engine power output may be reduced.
XHave the vehicle checked at a qualified specialist workshop as soon
as possible.
In some states it is legally prescribed that after the check engine indi- cator lamp lights up you must contact a qualified specialist workshop
immediately. Observe the legal requirements.
200Indicator and warning lamps in the instrument cluster
On-board computer and displays