
Redialing
The on-board computer saves the last names or
numbers dialed in the redial memory.
Using the steering wheel buttons
XUse theVorU button to select the TELmenu.
The display shows the mobile phone opera-
tional readiness symbol.
XPress the6button.
The display shows the most recently dialed
numbers or names in the redial memory.
XPress the 9or: button to select the
desired name or number.
XTo start dialing: press the6button.
The on-board computer dials the correspond-
ing phone number.
When a connection is established, the name
of the other person and/or the call duration
appear in the display.
or
XTo exit the redial memory: press the~
button.
Display messages
Notes on display messages
Important safety notes
GWARNING
No information will be displayed if either the
instrument cluster or the display is inopera-
tive.
As a result, you will not be able to see warning
and indicator lamps or information about the
driving conditions, such as speed or outside
temperature. Driving characteristics may be
impaired. Adjust your driving style and vehicle
speed accordingly.
Contact a qualified specialist workshop
immediately.
GWARNING
If service work is not carried out correctly, the operating safety of your vehicle may be affec-
ted. This could cause you to lose control of
your vehicle and cause an accident. More-
over, the safety systems may no longer be
able to protect you or others as they are
designed to do.
Always have service work carried out at a
qualified specialist workshop.
iIf you turn the key to position 2in the igni-
tion, a display check is performed. All warning
and indicator lamps (except the turn signal
indicator lamps) and the display are activa-
ted. Before starting the journey, check that
the warning and indicator lamps are operating
correctly.
Vehicles without steering wheel but-
tons
Warnings, malfunctions or additional informa-
tion may also be shown in the display. The fol-
lowing tables show all the display messages. A
warning tone sounds with certain display mes-
sages.
Vehicles with steering wheel buttons
The on-board computer shows warnings, mal-
functions or additional information in the dis-
play. A warning tone sounds with certain display
messages. Display messages of a high priority
are shown in red.
Please respond in accordance with the display
messages and follow the additional notes in this Operator's Manual.
You can hide low-priority display messages by
pressing the V,U,9or: button
on the steering wheel or the 9reset button.
You cannot hide display messages of the highest
priority. These messages will continue to be
shown in the display until their cause has been
eliminated.
The on-board computer stores certain display
messages in the message memory
(
Ypage 176).
Message memory
The on-board computer only records and shows
malfunctions and warnings from certain sys-
tems. Therefore, make sure that your vehicle is
safe to use. You could otherwise cause an acci-
dent by driving an unsafe vehicle.
176Display messages
On-board computer and displays

The on-board computer stores certain display
messages. In theMessage memory menu, you
can call up stored display messages.
Using the steering wheel buttons
XPress the VorU button repeatedly
until the number of stored display messages,
e.g. 2 messages
, appears in the display.
If no malfunctions have occurred, the No
messagesmessage appears.
XScroll through the stored display messages
with the9or: button.
XTo exit the message memory menu: press
the V orU button.
When you switch off the ignition, all display mes-
sages are deleted from the message memory.
You can only remove the key when it is in the
basic position.
Display messages177
On-board computer and displays
Z

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 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.
Display messages18 1
On-board computer and displays
Z

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 .
182Display messages
On-board computer and displays

Display messagesPossible causes/consequences andMSolutions
b
Brake fluid Visitworkshop
There is insufficientbrak efluid in 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 223).
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 .
Display messages183
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
Blind SpotAssistInoperativeBlind 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.
Tires
Display messagesPossible causes/consequences and MSolutions
Tirepres. Adjustpres.
O
The pressur eis insufficien tin on eor mor etires ,or th epressures of th e
individual tires differ significantly.
XChec kth etire pressur eat th enext opportunity and correc tit if
necessar y (Ypage 253).
Tirepres.
monito rinoperative
The tire pressur emonitor has malfunctioned.
XHav eth etire pressur emonitor and th ewheels checke dat aquali-
fie dspecialist workshop .
Tirepres.
monito rcurrentlyunavailable
The tire pressur emonitor function is temporarily unavailable due to
radi ointerferenc eor undervoltage.
XOnce th ecauses hav ebeen remedied, th etire pressur emonitor is
automatically activated.
Tir epres.-
monito rinoperativeNo wheel sensor s
The tire pressuremonitor is no treceiving signals from on eor mor e
wheels because:
Ra whee lhas been replace dwit hth espar ewhee lwithout whee l
electronics .
Rthemaximum temperature on on eof th ewhee lelectronics units has
been exceeded .
Rthewhee lelectronics are malfunctioning .
XHaveth etire pressur emonitor and th ewheels checke dat aquali-
fie dspecialist workshop .
Display messages191
On-board computer and displays
Z

Display messagesPossible causes/consequences andMSolutions
Check tire(s)
O
The pressureof on eor mor etires has dropped significantly. If th etire
pressur emonitor has detecte dth eaffecte dwheel, th ewhee lposition
is also displayed.
XStop th evehicl eas soo nas possible, payin gattention to roa dand
traffic conditions.
XChec kth etires .
XRepair or chang eth ewhee lif necessar y (Ypage 266).
XCheckth etire pressur eand correc tit if necessar y (Ypage 253).
The display message disappear sautomatically after drivin gfor a
few minute swit hth ecorrecte dtire pressure.
Warnin gTir edefect
O
On eor mor etires is losing air rapidly. If th etire pressur emonitor has
detecte dth eaffecte dwheel, th ewhee lposition is also displayed.
XStop th evehicl ewithout making any sudden steering or braking
maneuvers ,payin gattention to th etraffic condition sas you do so.
XRepair or chang eth ewhee l (Ypage 266).
Vehicle
Display messagesPossible causes/consequences and MSolutions
Ð
SteeringAssistanceFailure
The powe rassistanc efor th esteering has malfunctioned. You need to
steer mor eforcefully.
XCarefully continu eto aqualified specialist workshop and hav eth e
steering checke dimmediately.
#
Battery/AlternatorVisit workshop
The battery is no tbein gcharged. Possibl ecauses are adefective
alternato ror atorn poly-V-belt .
XStop thevehicl eas soo nas possible, payin gattention to roa dand
traffic conditions.
XChec kth epoly-V-belt .
XIf thepoly-V-belt is torn :do no tcontinu edriving. Consult aqualified
specialist workshop .
XIf thepoly-V-belt is no tdamaged: hav eth evehicl echecke das soo n
as possibl eby aqualified specialist workshop .
÷
Electrically oper‐atedste p
The electrical step has retracte dor extended only partially or no tat all.
XMak esur ethere is sufficien tfree spac efor th eelectrical step.
XOpe nor close th esliding door again .
XIf theelectrical step still does no textend or retrac tfully, push th e
step in manually (Ypage 67). Beforestepping out ,remind th epas-
senger sthat th estep is missing.
1
Hoo dope n
You are already drivin gat walking pace, eve nthough th ehoo dis no t
closed .
XCloseth ehood.
192Display messages
On-board computer and displays