Drivingsystems
Display messagesPossible causes/consequences an dMSolutions
120 km/h!
Maximu mSpeedExcee‐ded
Only forcertai ncountries: th emaximum speed has bee nexcee ded.
XDrive more slowly.
À
Attention AssistInoperative
ATTENTION ASSIST has failed.
XVisit aqualified specialis tworkshop .
Attention Assist :TakeaB reak!Based on certain criteria, ATTENTION ASSIST has detecte dfatigue or
al ac kofc oncentrat ion on thepartoft hedriver .Anadditional warnin g
tone sounds.
XIf necessary, take abreak .
Durin glon gjou rneys, take regular break singoodt imesot hatyou get
enough rest.
Par kAssistCanceledAdditionally, awarnin gton es ounds. The active parking assistanc ehas
bee ncanceled and Active Parking Assis thas ended automatically. Fo r
example, you hav etouched th esteerin gwhee lord riven to ofast.
XSteer and brake yourself.
XRepeat th eparking procedur eifnecessary. Observ ethe deactiva-
tion condition sasyou do so (Ypage 158).
ParkA ssist Inoper ‐ativePARKTRONIC is malfunctionin gorfaulty.
XFollow th einstructions and helpfulhints in th e"Problems wit h
PARKTRONIC" section (Ypage 154).
XIf thedisplay messag econtinu es to be shown ,consu ltaq ualified
specialis tworkshop .
Active Parking Assis tisunavailable or faulty.
XSwitc hoffthei gnition .
XStart th eenginea gain .
XIf thedisplay messag econtinu es to be shown or symbol jis no t
shown in th edisplay, consult aqualified specialis tworkshop .
Collision Preven ‐tionA ssist Inoper ‐ative
COLLISION PREVENTION ASSIST PLU Sisnotavailable due to amal-
function .
XVisitaqualified specialis tworkshop .
Display message s(vehicles wit hsteering whee lbuttons)21 3
On-board computera nd displays
Z
Display messagesPossible causes/consequences andMSolutions
Collision Preven‐tionAssist Cur ‐rentlyUnavail.SeeOper. Manual
COLLISION PREVENTION ASSIST PLU Sistemporarily inoperative.
Possibl ecauses:
RThe sensor sinthefron tbumper are dirty.
RThe function is impaire ddue to heav yrain or snow.
RThe radar sensor system is temporarily inoperative, e.g. due to
electromagneti cradiation emitted by nearby TV or radi ostation sor
other source sofelectromagneti cradiation .
RThe system is outside th eoperating temperature range.
RThe on-boar dvoltag eistoolow.
Once th ecauses listed abov enolonger apply, th edisplay message
goe sout and COLLISION PREVENTION ASSIST is operational again .
If th edisplay message does no tdisappear :
XPull overand stop th evehicle, payin gattention to roa dand traffic
conditions.
XSecur ethe vehicl etopreventitfromr ollin gaway (Ypage 132).
XSwitc hoff th eengine.
XClean th esensor sinthefron tbumper (Ypage 257).
XRestart th eengine.
Lan eKeepin gAssistInoperativeLaneKeepin gAssistisf aulty.
XVisit aqualified specialist workshop .
LaneKeepin gAssistCurrently Unavail.See Oper. Manual
LaneKeepin gAssistisd eactivated and temporarily inoperative. Pos -
sibl ecauses:
RThe windshield is dirty in th ecamera' sfield of vision .
RVisibilityisimpaire ddue to heav yrain ,sno worf og.
RThere are no lan emarking sfor an extended period of time.
RThe lan emarking sare wor naway, dark or covered, e.g. by dir tor
snow.
Once th ecauses listed abov enolonger apply, th edisplay message
goe sout and Lan eKeepin gAssistiso perational again .
If th edisplay message does no tdisappear :
XPull overand stop th evehicle, payin gattention to roa dand traffic
conditions.
XSecur ethe vehicl etopreventitfromr ollin gaway (Ypage 132).
XClean th ewindshield.
Cruise Contro lLDC_Spd_DsrspeedUnit
Aconditi on for activating cruise control has no tbeen met .
You hav etried to store aspeed belo w20m ph(30 km/ h)for example.
XIf conditions permit, drive faster than 20 mph (30 km/h )and store
the speed.
XCheck the activation conditions for cruis econtrol (Ypag e140).
214Display messages (vehiclesw iths teering wheel buttons)
On-board computer and displays
Display messagesPossible causes/consequences andMSolutions
Blind SpotAssistInoperativeBlind Spot Assis tisfaulty.
XVisit aqualified specialist workshop .
Blind SpotAssistCurrently Unavail.See Operator' sMan‐ual
Blind Spot Assis tistemporarily inoperative. Possibl ecauses:
RYou hav eattached atrailer .
RThe sensor sintherear bumper are dirty.
RThe function is impaire ddue to heav yrain or snow.
RThe radar sensor system is temporarily inoperative, e.g. due to
electromagneti cradiation emitted by nearby TV or radi ostation sor
other source sofelectromagneti cradiation .
RThe system is outside th eoperating temperature range.
Once th ecauses listed abov enolonger apply, th edisplay message
goe sout and Blind Spot Assis tisoperational again .
If th edisplay message does no tdisappear :
XPull overand stop th evehicle, payin gattention to roa dand traffic
conditions.
XSecur ethe vehicl etopreventitfromr ollin gaway (Ypage 132).
XSwitc hoff th eengine.
XClean th esensor sintherear bumper (Ypage 257).
XRestart theengine.
Display message s(vehicles wit hsteering whee lbuttons)21 5
On-board computera nd displays
Z
Tires
Display messagesPossible causes/consequencesand MSolutions
AdjustTirePressureThe tire pressure is too lo winatleastone of the tires, or the tire
pressure differenc ebetween the wheels is too great.
XCheck the tire pressure at the next opportunity (Ypage 274).
XIf necessary,c orrect the tire pressure.
XRestart the tire pressure monitor (Ypage 277).
Check TiresAn additional warning tone sounds.
The tire pressure in one or mor etiresh asdropped significantly. The
displa yshows the whee lposit ion.
GWARNING
Underinflated tire sposet he following risks:
RThe tire smayburst, especially as the load and vehicl espeed
increase.
RThe tire smaywear excessivel yand/or unevenly, which mayg reatly
impai rtire traction.
RThe handling as well as steerin gand braking characteristics mayb e
severely affected.
There is ariskofana ccident.
XStop the vehicl ewithou tmaking any sudden steerin gorbraking
maneuvers. Pa yattentio ntothe trafficc onditions whil edoing so.
XSecure the vehicl etoprevent it fromr olling away (Ypage 132).
XCheck the tiresand,ifn ecessary,c hange the whee l(Ypage 286).
XCheck the tire pressure (Ypage 274).
XIf necessary,correct the tire pressure.
WarningTireM al‐functionThe tire pressure in one or mor etire sh asdropped suddenly. The dis-
play shows the whee lposit ion.
GWARNING
Driving with aflatt ire poses ariskoft he following hazards:
RAflatt ire affects the ability to stee rorbrake the vehicle.
RYouc ould thenl osec ontro lofthe vehicle.
RContinued drivin gwithaf latt ire will cause excessive heat build-up
and possibl yafire.
There is ariskofana ccident.
XStop the vehicl ewithou tmaking any sudden steerin gorbraking
maneuvers. Pa yattentio ntothe trafficc onditions whil edoing so.
XSecure the vehicl etoprevent it fromr olling away (Ypage 132).
XCheck the tiresand,ifn ecessary,c hange the whee l(Ypage 286).
TirePressure Moni‐tor CurrentlyUnavailable
Due to asource of radi ointerference, no signals can be receive dfrom
the whee lsensors. The tire pressure monitor is temporaril ymalfunc-
tioning.
The tire pressure monitor restarts automaticall yassoona sthe prob-
le mh asbeen solved.
216Displa ymessage s(vehicles wit hsteering whee lbuttons)
On-board computera nd displays
Display messagesPossible causes/consequences andMSolutions
Wheel Sensor(s)MissingThere is no signal from th etirep ressur esensor of on eorseveral
wheels. The pressur eoftheaffecte dtireisn otshown in th edisplay.
XHav ethe fault ytirep ressur esensor replace dataqualified special -
ist workshop .
TirePressure Moni‐tor Inoperative NoWheel Sensor s
The wheels installed do no thaves uitable tire pressur esensors. The
tire pressur emonitor is deactivated.
XInstall wheels 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 malfunctioning .
XVisitaqualified 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.
Auxiliary Batter yMalfunctionThe auxiliary battery for th etransmission is no longer bein gcharged.
XVisit aqualified specialist workshop .
Apply Brake toShift from'P'You hav eattempte dtomovet he transmission selector lever to posi-
tion D,Ror Nwithout depressing th ebrak epedal .
XDepress th ebrak epedal .
RiskofR olling:TransmissionNotinP
An additional warning tone sounds. The driver's door is open and th e
transmission is in position R,N or D.
XShift th etransmission to position P.
XSecurethe vehicl etopreventitfromr ollin gaway (Ypage 132).
Servic eRequiredDoNot Shift GearsVisit Dealer
An additional warning tone sounds. You canno tchang et he transmis -
sion position due to amalfunction .
If transmission position Dis selected:
XDrive to aqualified specialist workshop without shifting th etrans -
mission from position D.
If transmission position R,N or Pis selected:
XConsult aqualified specialist workshop .
OnlyShift to 'P'whenVehicl eisSta‐tionar y
The vehicl eisstill moving .
XPull overand stop th evehicle, payin gattention to roa dand traffic
conditions.
XShift th etransmission to position P.
Display messages(vehicles wit hsteering whee lbuttons)21 7
On-board computera nd displays
Z
Display messagesPossible causes/consequences andMSolutions
ÒThe tailgateisopen.
XClos ethe tailgate.
ÑThe rear door is open .
XClosethe rear door(s).
ÓAn additional warning tone sounds. The hoo disopen.
GWARNIN G
The open hoo dmay then bloc kyour vie wwhen th evehicl eisinm otion.
There is ariskofana ccident.
XStop thevehicl eimmediately, payin gattention to roa dand traffic
conditions.
XSecur ethe vehicl etopreventitfromr ollin gaway (Ypage 132).
XClosethe hood.
CAn additional warning tone sounds while th evehicl eisinm otion.The
display shows th eopen door(s).
XClos eall doors.
Ð
Power Steering Mal ‐function See Oper.Manual
An additional warning tone sounds. The steering powe rassistanc e
could be malfunctioning .You may need to steer mor eforcefully.
XCarefully continu etoaqualified specialist workshop and hav ethe
steering checke dimmediately.
Â
Obtain aNew Key
The ke yneeds to be replaced.
XVisit aqualified specialist workshop .
Phone No ServiceYour vehicleisoutside th enetwork provider' stransmitter/receiver
range.
¥
Check Washer Fluid
The washer flui dlevel in th ewasher flui dreservoir has dropped belo w
th em inimum .
XAddw asher flui d(Ypage 246).
Indicatorand warning lamps in th einstrume nt cluster
Generaln otes
Whe nswitching on th eignition ,som esystems carry out aself-test .Som eindicator and warning
lamp smay temporarily tur nonorstart to flash. This is no tanindication of any problem .Onlyw hen
these indicator and warning lights tur nonorstart flashin gafter th eengineh as started or during th e
journey has amalfunction occurred .
218Indicator and warning lamps in th einstrument cluster
On-board computera nd displays
Safety systems
Warning/
indicator
lampNSignal type
Possible causes/consequences and M
Solutions
$J
òN$ (USA only) or J(Canada only): the ABS and brake warning lamps are
lit while the engine is running.
EBD is unavailable due to amalfunction .ABS ,BAS,h ill start assist and ESP
®as well
as its driving safety systems, for example, are therefore also unavailable.
ATTENTION ASSIST is deactivated and other driving systems could be automati-
cally deactivated.
GWARNING
The brake system continues to function normally, but without the functions listed
above. The wheels could therefore lock prematurely if you brake hard, for example.
This causes steerability and braking to be greatly impaired. The braking distance
can increase in emergency braking situations.
If ESP
®is not operational, ESP®will not stabilize the vehicle.
There is an increased risk of skidding and accidents.
XObserve the display messages.
XDrive on with care.
XVisit aqualified specialist workshop immediately.
$JNThe red $(USA only) or J(Canada only) brake system warning lamp is lit
while the engine is running. An additional warning tone sounds.
There is insufficient brake fluid in the brake fluid reservoir.
GWARNING
Braking performancec an be impaired.
There is arisk of an accident.
XStop the vehicle immediately, paying attention to road and traffic conditions. Do
not continue driving under any circumstances.
XSecure the vehicle to prevent it from rolling away (Ypage 132).
XDo not add brake fluid. Adding more will not remedy the malfunction.
XConsult aqualified specialist workshop.
XObserve the display messages.
220Indicator and warning lamp sinthe instrument cluster
On-board computer and displays
Warning/
indicator
lampNSignal type
Possiblec auses/consequences and M
Solutions
ò!NThe yellow ABS warning lamp is lit while the engine is running.
ABS has been deactivated due to amalfunction. BAS, hil lstart assist and ESP®as
wel lasi ts driving safety systems ,for example, are therefore als odeactivated.
ATTENTION ASSIST is deactivated and other driving systems coul dbeautomati-
call ydeactivated.
GWARNING
The brake system continues to function normally, but without the functions listed
above. The wheels coul dtherefore lock prematurely if you brake hard ,for example.
This causes steerability and braking to be greatly impaired .The braking distance
can increas einemergency braking situations.
If ESP
®is not operational ,ESP®wil lnot stabilize the vehicle.
There is an increased risk of skidding and accidents.
XObserve the display messages.
XDrive on with care.
XVisi taq ualified specialist worksho pimmediately.
If the ABS control unit is faulty, there is als oapossibility that other systems ,such
as the automatic transmission, wil lberestricted or unavailable.
÷NThe yellow ESP®warning lamp flashes while the vehicleisinm otion.
ESP®or traction control is intervening because there is arisk of skidding or at least
one whee lhas started to spin.
Cruise control is automatically deactivated.
XWhen starting off, do not depress the accelerator pedalm ore than is necessary.
XEase off the accelerator pedalwhile driving.
XAdapt yourdriving style to sui tthe weather and road conditions.
XDo not deactivate ESP®.
In rare cases ,itmay be best to deactivate ESP®(Ypage64).
÷NThe yellow ESP®warning lamp is lit while the engine is running.
ESP®,B AS, hil lstart assist, ESP®trailer stabilization and Crosswind Assist are
unavailable due to amalfunction.
ATTENTION ASSIST is deactivated and other driving systems coul dbeautomati-
call ydeactivated.
GWARNING
The brake system continues to function normally, but without the functions listed
above.
The braking distance in an emergency braking situation can thus increase.
If ESP
®is not operational ,ESP®wil lnot stabilize the vehicle.
There is an increased risk of skidding and accidents.
XObserve the display messages.
XDrive on with care.
XVisi taq ualified specialist worksho pimmediately.
Indicator and warning lamps in the instrument cluster221
On-board computer and displays
Z