
Display messagesPossible causes/consequences andMSolutions
CThere is onlyaver ysmall amount of fuel in th efuel tank.
XRefue lat th eneares tgas station without fail .
8
Gas Cap Loose
The fuel filler cap is notclosed correctl yor th efuel system is leaking .
XCheckthat th efuel filler cap is correctl yclosed .
If th efuel filler cap is not correctl yclosed :
XCloseth efuel filler cap .
If th efuel filler cap is correctl yclosed :
XVisitaqualified specialist workshop .
8
Ultra Low-sulfurDiesel FuelOnl y
Vehicles wit h adiesel engine: th efuel level has fallen belo wthe
reserv erange.
XRefue lat th eneares tgas station .
XOnly use commercially available vehicular ULTRA-LOW SULFUR
HIGHWAY DIESEL FUEL (ULSD ,15 ppm sulfur MAXIMUM) .
¸
ReplaceAir Filter
Vehicles wit h adiesel engine: th eengin eair filter is dirty and mus tbe
replaced.
XVisit aqualified specialist workshop .
!
Check FuelFilter
Vehicles wit h adiesel engine: there is water in th efuel filter. The water
mus tbe draine doff .
XVisit aqualified specialist workshop .
Ø
Check Additive SeeOperator'sManual
The DE Ftan kis almost empty.
XHav eth eDE Ftan kfilled immediately at aqualified specialist work-
sho p (Ypage 142).
Ø
RemainingStarts :16
The DEFlevel has fallen to aminimum .You can start th eengin e a
further 16 times .
XHaveth eDE Ftan kfilled immediately at aqualified specialist work-
sho p (Ypage 142).
iYou can start th eengin e afurther 16 times .If DE Fis no tadded ,it
will then no tbe possibl eto restar tth eengine. Refill th eDE Ftan k
wit happroximately 1gal (3. 8l) DE F (
Ypage 142).
Display messages237
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
LaneKeepin gAssistCurrently Unavaila‐ble See Operator' sManualorActive Lan eKeepingAssist Cur ‐rently UnavailableSee Operator' sMan ‐ual
LaneKeepin gAssis tor Active Lan eKeepin gAssis tis deactivated and
temporarily inoperative.
Possibl ecauses are:
Rth ewindshield in th ecamera' sfield of vision is dirty
Rvisibilit yis impaire ddue to heav yrain ,snow or fog
Rthere hav ebeen no lan emarking sfor an extended period
Rth elan emarking sare worn, dark or covered, e.g. by dir tor snow
Whe nth ecauses state dabov eno longer apply, th edisplay message
disappears.
Lan eKeepin gAssis tor Active Lan eKeepin gAssis tis operational
again .
If th edisplay message does no tdisappear :
XPull overand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions.
XSecur eth evehicl eagainst rollin gaway (Ypage 145).
XClean th ewindshield.
Lan eKeepin gAssistInoperativeorActiveLan eKeepin gAssistInoperative
LaneKeepin gAssis tor Active Lan eKeepin gAssis tis malfunctioning .
XVisitaqualified specialist workshop .
Blind SpotAssistCurrently Unavaila‐ble See Operator' sManualorActiveBlind Spo tAssistCurrently Unavaila‐ble See Operator' sManual
Blind Spot Assistor Active Blind Spot Assis tis temporarily inoperative.
Possibl ecauses are:
Rth eradar sensor system is outside th eoperating temperature range
Rth eradar sensor system is temporarily inoperative, e.g. due to elec -
tromagneti cradiation emitted by nearby TV or radi ostation sor
other source sof electromagneti cradiation
The yellow 9indicator lamp salso ligh tup in th eexterio rmirrors.
Whe nth ecauses state dabov eno longer apply, th edisplay message
disappears.
Blind Spot Assis tor Active Blind Spot Assis tis operational again .
If th edisplay message does no tdisappear :
XPull overand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions.
XSecur eth evehicl eagainst rollin gaway (Ypage 145).
XRestart th eengine.
Blind Spo tAssistNot Available Whe nTowingaTraile rSee Operator' sMan ‐ualorAct. BlindSpo tAsst. NotAvailable Whe nTow ‐ing aTraile rSeeOperator' sManual
Blind Spot Assis tor Active Blind Spot Assis tis deactivated while tow-
ing atrailer .
You hav eestablished th eelectrical connection between th etrailer and
your vehicle.
XPress aon thesteering whee lto confirm th edisplay message .
240Display messages
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
Blind SpotAssistinoperativeorActiveBlind Spo tAssistinoperative
Blind Spot Assis tor Active Blind Spot Assis tis malfunctioning .
The yellow 9indicator lamp salso ligh tup in th eexterio rmirrors.
XVisit aqualified specialist workshop .
ParkingPilot Can ‐celedThe driver's door is open .
XRepeat theparking gap measuremen tand parking process wit hth e
driver's door closed .
You haveinadvertentl ytouched th emultifunction steering whee lwhile
steering intervention was active .
XWhilesteering intervention is active ,mak esur ethat th emultifunc-
tion steering whee lis no ttouched unintentionally.
The vehicl ehas started to skid and ES P®has intervened.
XUse Parking Pilotagain later (Ypage 177).
ParkingPilot Inop‐erativ ePARKTRONI CParking Assis tis malfunctioning or faulty.
XFollow th einstruction sand helpful hints in th e"Problem swit h
PARKTRONI CParking Assist" section (Ypage 177).
If th emultifunction display still shows th edisplay message :
XVisitaqualified specialist workshop .
Parking Pilotis unavailable or malfunctioning .
XSwitchoff th eignition and restar tth eengine.
If th eParking Pilo tcontinues to be unavailable (the jsymbol does
no tappear in th emultifunction display):
XVisit aqualified specialist workshop .
ParkingPilot Fin ‐ishedThe vehicleis parked. Awarning tone also sounds.
The display message disappear sautomatically.
Distance Pilot offDistanc ePilo tDISTRONI Cis deactivated.
If awarning tone also sounds, Distanc ePilo thas deactivated auto -
matically (
Ypage 159).
Distance Pilotavailable againDistancePilo tDISTRONI Cis operational again after having been tem-
porarily unavailable .You can no wreactivat eDistanc ePilo t
DISTRONI C (
Ypage 159).
Display messages241
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
Distance Pilot Cur‐rently UnavailableSee Operator'sMan ‐ual
Distanc ePilo tDISTRONI Cis temporarily inoperative.
Steering Pilo tis also temporarily inoperative.
Possibl ecauses are:
Rth eradar sensor system is temporarily inoperative, e.g. due to elec -
tromagneti cradiation emitted by nearby TV or radi ostation sor
other source sof electromagneti cradiation
Rth esystem is outside th eoperating temperature range
Rth eon-boar dvoltag eis to olow
A warning tone also sounds.
Whe nth ecauses state dabov eno longer apply, th edisplay message
disappears.
Distanc ePilo tDISTRONI Cis operational again .
If th edisplay message does no tdisappear :
XPull overand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions.
XSecur eth evehicl eagainst rollin gaway (Ypage 145).
XRestart th eengine.
DistancePilotinop‐erativ eDistanc ePilo tDISTRONI Cis malfunctioning .
The followin gmay hav ealso failed:
RActive Brake Assis t
RActive Brake Assistwit hcross-traffic function
A warning tone also sounds.
XVisit aqualified specialist workshop .
Distance Pilot Sus‐pendedYou havedepressed th eaccelerato rpedal .Distanc ePilo tDISTRONI C
is no longer controllin gth espeed of th evehicle.
XRemove your foo tfrom th eaccelerato rpedal .
Distance Pilot
- - - mph
Acondition for activating Distanc ePilo tDISTRONI Chas no tbeen met .
XCheckth eactivation condition sfor Distanc ePilo tDISTRONI C
(Ypage 159).
242Display messages
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
TirePressure Moni‐tor Inoperative NoWheel Sensor s
The wheels mounte ddo no thav e a suitable tire pressur esensor .The
tire pressur emonitor is deactivated.
XMoun twheels wit hsuitable tire pressur esensors.
The tire pressur emonitor is activated automatically after drivin gfor
a few minutes.
Tir ePress.Monito rInoperativeThe tire pressur emonitor is faulty.
XVisit aqualified specialist workshop .
Vehicle
Display messagesPossible causes/consequences and MSolutions
Shiftto'P'or'N'to Start EngineYou haveattempte dto start th eengin ewit hth etransmission in posi-
tion Ror D.
XShift th etransmission to position Por N.
Apply Brake toShift fro m'P'You hav eattempte dto shift th etransmission to position D,Ror N
without depressing th ebrak epedal .
XDepress th ebrak epedal .
ToDeselectPorN,Depres sBrake andStart Engine
Wit hth eengin eswitched off ,you hav eattempte dto shift th etrans -
mission out of position Por Nint oanother transmission position .
XDepress thebrak epedal .
XStart th eengine.
TransmissionNotinP Ris kof Vehicl eRollingAwa y
The driver's door is open/not completely closed and th etransmission
is in position R,N or D.
A warning tone also sounds.
GWARNIN G
The vehicl emay rol laway.
There is aris kof an accident.
XShift th etransmission to position P.
XSecureth evehicl eagainst rollin gaway (Ypage 145).
XCloseth edriver's door completely.
Onl yShift to 'P'whe nVehicl eisSta‐tionar y
The vehicl eis moving .
XStop thevehicl esafely as soo nas possible, payin gattention to roa d
and traffic conditions.
XShift th etransmission to position P.
246Display messages
On-board computer and displays

SmartKey
Display messagesPossible causes/consequences andMSolutions
Â
KeyDoesNotBelongto Vehicle
You have put the wrong SmartKey in the ignition lock.
XUse the correct SmartKey.
Â
Take Your Key fromIgnition
The SmartKey is in the ignition lock.
A warning tone also sounds.
XRemove the SmartKey.
Â
Obtain a New Key
The SmartKey needs to be replaced.
XVisit a qualified specialist workshop.
Â
Replace Key Battery
The SmartKey battery is discharged.
XChange the battery (Ypage 74).
Â
Don't Forget YourKey
The SmartKey is not in the ignition lock. You have opened the driver's
door with the engine switched off.
A warning tone also sounds.
This display message is displayed for a maximum of 60 seconds and is
simply a reminder.
XTake the SmartKey with you when you leave the vehicle.
Â
Key Not Detected(white display message)
The SmartKey is currently undetected.
XChange the location of the SmartKey in the vehicle.
If the SmartKey still cannot be detected:
XOperate the vehicle with the SmartKey in the ignition lock.
Â
Key Not Detected(red display message)
The SmartKey is not in the vehicle.
A warning tone also sounds.
If the engine is switched off, you can no longer lock the vehicle cen-
trally or start the engine.
XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 145).
XLocate the SmartKey.
Display messages249
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
Becausethere is interferenc efrom astron gsource of radi owaves, th e
SmartKey is no tdetecte dwhils tth eengin eis running.
A warning tone also sounds.
XPull ove rand stop th evehicl esafely as soo nas possible, payin g
attention to roa dand traffic conditions.
XSecur eth evehicl eagainst rollin gaway (Ypage 145).
XInsertth eSmartKey int oth eignition loc kand drive in SmartKey
mode.
Â
Remove 'Start 'But ‐ton and Insert Key
RThe SmartKey detection function has atemporar ymalfunction or is
faulty.
RThe SmartKey is continually undetected.
A warning tone also sounds.
XInser tth eSmartKey int oth eignition loc kand tur nit to th edesire d
position .
XVisitaqualified specialist workshop .
Warning and indicat orlamps in the instrume nt cluster
General notes
Some systems carry out aself-diagnosis when th eignition is switched on .Therefore ,som eindicator
and warning lamp smay ligh tup or flas htemporarily. This behavio ris non-critical .These indicator
and warning lamp sonly indicat e amalfunction if they ligh tup or flas hafter starting th eengin eor
whils tdriving.
Safety
Seat belts
Warning/
indicator
lam pNSignal type
Possible causes/consequences and M
Solutions
üNAfte rstarting th eengine, th ered seat belt warning lamp lights up for 6seconds .
The seat belt warning lamp remind sth edriver and fron tpassenger to faste ntheir
seat belts.
XFaste nyour seat belt (Ypage 42).
üNAfte rstarting th eengine, th ered seat belt warning lamp lights up. In addition , a
warning tone sounds for up to 6seconds.
The driver's seat belt is no tfastened.
XFaste nyour seat belt (Ypage 42).
The warning tone ceases .
250Warning and indicator lamps in the instrument cluster
On-board computer and displays

Warning/
indicator
lampNSignal type
Possible causes/consequences and M
Solutions
üNThe red seat belt warning lamp lights up after the engine starts, as soon as the
driver's or the front-passenger door is closed.
The driver or front passenger has not fastened their seat belt.
XFasten your seat belt (Ypage 42).
The warning lamp goes out.
There are objects on the front-passenger seat.
XRemove the objects from the front-passenger seat and stow them in a secure
place.
The warning lamp goes out.
üN The red seat belt warning lamp flashes and an intermittent audible warning
sounds.
The driver or front passenger has not fastened their seat belt. The vehicle is being driven faster than 15 mph (25 km/h) or has briefly been driven faster than 15 mph
(25 km/h).
XFasten your seat belt (Ypage 42).
The warning lamp goes out and the intermittent warning tone ceases.
There are objects on the front-passenger seat. The vehicle is being driven faster
than 15 mph (25 km/h) or has briefly been driven faster than 15 mph (25 km/h).
XRemove the objects from the front-passenger seat and stow them in a secure
place.
The warning lamp goes out and the intermittent warning tone ceases.
Warning and indicator lamps in the instrument cluster251
On-board computer and displays
Z