Display messagesPossible causes/consequences andMSolutions
In addition,th eyellow ;CheckEngin eindicator lamp and th eyel-
low å DEFindicator lamp ligh tup in th einstrumen tcluste rand a
warning tone sounds.
You canno tdrive th evehicl eat aspeed exceedin g 5mph (8 km/h).
XVisit aqualified specialist workshop immediately.
Errflashes for 5seconds, in addition th eà indicator lamp flashes in
th einstrumen tcluste rand then lights up yellow continuously.
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 .
If th eproblem persists ,visit aqualified specialist workshop .
Errflashes for5seconds ,th e_ indicator lamp also flashes and then
goe sout .
Highbea mAssis tis deactivated and temporarily no toperational or
Highbea mAssis tis malfunctioning .
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 e_ indicator lamp goe sout ,Highbea mAssis tis operational
again .
If th eproblem persists ,visit aqualified specialist workshop .
176Display messages
On-board computer and displays
Display messages on vehicles withsteering wheel buttons
Safet ysystems
Display messagesPossible causes/consequences an dMSolutions
ABS
Visit workshop
AB Shas bee ndeactivated due to amalfunction .ES P®,AS Rand BAS,
as well as cruise control, hav ealso bee ndeactivated as aresult .
GWARNING
The brake syste mcontinues to function normally, but without th e
function slisted above. The wheels could therefore loc kif you brake
hard, fo rexample.
Thi scauses steerability and braking to be greatly impaired. The brak-
in gdistanc ecan increase in emergency braking situations. The driven
wheels can spi nwhen accelerating.
If ES P
®is no toperational, ES P®will notstabilize th evehicle.
There is an increase dris kof skidding and accidents .
XDrive on withcare.
XVisit aqualified specialis tworkshop immediately.
ABS
Unavailable
AB Sis temporarily unavailable or is deactivated due to undervoltage.
ES P®,AS Rand BAS, as well as cruise control, are also unavailable as
a result .
The battery may no tbe bein gcharged.
GWARNING
The brake syste mcontinues to function normally, but without th e
function slisted above. The wheels could therefore loc kif you brake
hard, fo rexample.
Thi scauses steerability and braking to be greatly impaired. The brak-
in gdistanc ecan increase in emergency braking situations. The driven
wheels can spi nwhen accelerating.
If ES P
®is no toperational, ES P®will notstabilize th evehicle.
There is an increase dris kof skidding and accidents .
XDrive for ashort distanc eat aspeed of more than 13 mph
(20 km/h).
If th edisplay messag edisappears ,th efunction smentioned abov e
are available again .
If th edisplay messag econtinues to be displayed:
XDrive on wit hcare.
XVisit aqualified specialis tworkshop immediately.
178Display messages
On-board computer and displays
Display messagesPossible causes/consequences andMSolutions
:
Visit workshop
ASRhas been deactivated due to amalfunction .
The engin epowe routput may be reduced.
GWARNIN G
The driven wheels can spin when accelerating .
There is an increased ris kof skiddin gand accidents .
XDrive on withcare.
XVisit aqualified specialist workshop immediately.
:
Visit workshop
BA Shas been deactivated due to amalfunction .
GWARNING
The brak esystem continues to function normally, but without elec -
tronic support .
The braking distanc ecan increas ein emergenc ybraking situations.
There is aris kof an accident.
XDrive on wit hcare.
XVisit aqualified specialist workshop immediately.
:
Unavailable
AS Rand BA Shav ebeen deactivated due to undervoltage.
The battery may no tbe bein gcharged.
GWARNIN G
The brak esystem continues to function normally, but without th e
function slisted above. The wheels could therefor eloc kif you brak e
hard, for example.
The braking distanc ecan increas ein emergenc ybraking situations.
The driven wheels can spin when accelerating .
There is an increased ris kof skiddin gand accidents .
XDrive on withcare.
XVisit aqualified specialist workshop immediately.
#
Brake wea rVisitworkshop
The brak epads/linings hav ereached their wear limit.
XHav eth ebrak epads/linings replace das soo nas possibl eat a
qualified specialist workshop .
Display messages179
On-board computer and displays
Z
Display messagesPossible causes/consequences andMSolutions
b
Brake fluid Visitworkshop
There is insufficientbrak eflui din th efluid reservoir .
GWARNING
Braking performance can be impaired.
There is aris kof an accident.
XStop th evehicl eas soo nas possible, payin gattention to roa dand
traffic conditions.
XChec kth ebrak efluid level in th ebrak efluid reservoir
(Ypage 219).
If th ebrak eflui dis belo wtheMIN mark:
XDo no tcontinu edrivin gunder any circumstances.
XDo no tadd brak efluid .This does no tsolv eth eproblem .
XConsult aqualified specialist workshop .
If th ebrak eflui dis abov eth eMIN mark:
XDrive on wit hcare.
XVisit aqualified specialist workshop immediately.
b
Brake force distri ‐bution
EBDhas been deactivated due to undervoltage.
The battery may no tbe bein gcharged.
GWARNIN G
The rear wheels could loc kwhen you apply th ebrakes. The braking
distanc ecan increas ein emergenc ybraking situations.
There is an increased ris kof skiddin gand accidents .
XStop thevehicl eas soo nas possible, payin gattention to roa dand
traffic conditions.
XDo no tdrive on .
XConsult aqualified specialist workshop .
b
Brake force distri‐bution Visit work‐shop
EBDhas been deactivated due to amalfunction .
GWARNING
The rear wheels could loc kwhen you apply th ebrakes. The braking
distanc ecan increas ein emergenc ybraking situations.
There is an increased ris kof skiddin gand accidents .
XStop thevehicl eas soo nas possible, payin gattention to roa dand
traffic conditions.
XDo no tdrive on .
XConsult aqualified specialist workshop .
180Display messages
On-board computer and displays
Display messagesPossible causes/consequences andMSolutions
ESP
Visit workshop
ESP®has been deactivated due to amalfunction .As aresult ,cruise
control has also been deactivated.
Engin epowe routput may be reduced.
GWARNIN G
If ES P
®is no toperational, ES P®will notstabiliz eth evehicle.
There is an increased ris kof skiddin gand accidents .
XDrive on withcare.
XVisit aqualified specialist workshop immediately.
ESP
Unavailable
ES P®has been deactivated due to undervoltage. As aresult ,cruise
control has also been deactivated.
The battery may no tbe bein gcharged.
GWARNIN G
If ES P
®is no toperational, ES P®will notstabiliz eth evehicle.
There is an increased ris kof skiddin gand accidents .
XDrive on withcare.
XConsult aqualified specialized workshop as soo nas possible.
c
Parkin gbrakeReleas ebrake
Additionally, awarning tone sounds.
You are drivin gwit hth eparking brak eapplied.
XReleas eth eparking brak e (Ypage 128).
7
Seatbeltsys.Visitworkshop
The belt system has malfunctioned.
GWARNIN G
In th eevent of an acciden tor arapi ddeceleration ,th eseat belt seither
canno tprotect you as intended.
There is aris kof injury.
XConsult aqualified specialized workshop as soo nas possible.
6
Restraint systemVisit workshop
The restrain tsystem is faulty.
GWARNIN G
If th erestrain tsystem is malfunctioning ,individual systems could be
triggered inadvertentl yor might no tbe triggered at all in th eevent of
an accident.
There is an increased ris kof injury and accidents .
XDrive on withcare.
XVisit aqualified specialist workshop immediately.
Display messages18 1
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 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
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
On-board computer and displays
Z
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