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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
If the instrument display fails or is malfunc-
tioning, you may not recognize limitations in
the functions of systems relevant to safety.
The operating safety of your vehicle could be
affected. There is a risk of an accident.
Drive on carefully. Have the vehicle checked
at a qualified specialist workshop immedi-
ately.
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 175).
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.
The on-board computer stores certain display
messages. In the Message 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 messages175
On-board computer and displays
Z
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Display messages on vehicles withoutsteering wheel buttons
Cruis econtro l
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 .
Tire pressure monitor
Display messagesPossible causes/consequences an dMSolutions
NO TPM STheNOmessag 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 254).
176Display messages
On-board computer and displays
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Diesel Exhaust Fluid(DEF)
Vehicles wit hpassenger vehicle approva l
Display messagesPossible causes/consequences an dMSolutions
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 128).
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.
StArtS RExxIn addition, the yellow åDEF indicator lamp lights up and a warning
tone sequence sounds.
The DEF supply has dropped below the 0.8 US gal (3.0 l) reserve mark.
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
(16to1) is shown in the
message every time the engine is started.
XAdd at least 1.5 US gal (5.5 l) of DEF (Ypage 128).
The å DEF indicator lamp only disappears 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.
In addition, the yellow ;Check Engine indicator lamp and the yel-
low å DEF indicator lamp light up in the instrument cluster and
three short warning tones sound.
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.
Display messages177
On-board computer and displays
Z
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Display messagesPossible causes/consequences andMSolutions
¯
StArtS IdLE
In addition,th eyellow åDEFindicator lamp and th e; Check
Engin eindicator lamp ligh tup in th einstrumen tcluste rand three
warning tone ssound.
If th eStArtS
IdL Emessage is displayed, you canno tdrive th evehicl e
at aspeed of mor ethan 5mph (8 km/ h).
XAdd at least 1.5 US gal (5.5 l) of DEF (Ypage 128).
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.
You cannot drive the vehicle at a speed exceeding 5 mph (8 km/h).
XVisit a qualified specialist workshop immediately.
Vehicles with commercial vehicle approval
Display messagesPossible causes/consequences and MSolutions
dEF ChkIn addition, the yellowåDEF indicator lamp lights up in the instru-
ment cluster and a warning tone sounds.
The DEF supply has dropped below 1.5 US gal (5.5 l).
XAdd DEF supply (Ypage 128). The
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.
StArtS RExxIn addition, the yellow åDEF indicator lamp lights up and a warning
tone sequence sounds.
The DEF supply has dropped below the 0.8 US gal (3.0 l) reserve mark.
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
(16to1) is shown in the
message every time the engine is started.
XAdd at least 1.5 US gal (5.5 l) of DEF (Ypage 128).
The å DEF indicator lamp only disappears 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.
178Display messages
On-board computer and displays
Page 181 of 294

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
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 of more than 5 mph (8 km/h).
XAdd at least 1.5 US gal (5.5 l) of DEF (Ypage 128).
The å DEF indicator lamp only disappears 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.
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
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Drivingsystems
Display messagesPossible causes/consequences an dMSolutions
Errflashe sfo r 5 seconds, in addition th eà indicator lamp flashes in
th einstrumen tcluster and then lights up yello wcontinuously.
Lan eKeepin gAssis tis deactivated and temporarily inoperative .
Possible causes are :
RThere are no lanemarking spresent.
RThe camera's functionalit yis impaire ddue to heav yrain ,snow or
fog.
RThe camera canno trecogniz eth eroad markings:
-It is to odark.
-The lan emarking sare wor nor are covered, fo rexample, by dir tor
snow.
RThe windshield is dirty in th ecamera's field of vision .
XStop thevehicle payin gattention to road and traffic conditions.
XSecur eth evehicle to preven tit from rollin gaway (Ypage 129).
XClean th ewindshield (Ypage 236), 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 specialis tworkshop .
Errflashesfo r 5 seconds ,th e_ indicator lamp also flashes and then
goe sout .
Highbeam Assis tis deactivated and temporarily no toperational or
Highbeam Assis tis malfunctioning.
Possible causes are :
RThe camera's functionalit yis impaire ddue to heav yrain ,snow or
fog.
RThe windshield is dirty in th ecamera's field of vision .
XStop thevehicle payin gattention to road and traffic conditions.
XSecur eth evehicle to preven tit from rollin gaway (Ypage 129).
XClean th ewindshield (Ypage 236), particularly in th ecamera's
field of vision .
If th e_ indicator lamp goe sout ,Highbeam Assis tis operational
again .
If th eproblem persists ,visit aqualified specialis tworkshop .
Blind_Errflashesfo r 5 seconds ,th eyello windicator lamp sflas hin th eexterio r
mirrors and then ligh tup constantly.
Blin dSpot Assis tis faulty.
XVisit aqualified specialis tworkshop .
Errflashesfo r 5 seconds ,th eÄ indicator lamp also flashes and then
lights up constantly.
COLLISION PREVENTION ASSIST is malfunctioning.
XVisit aqualified specialis tworkshop .
180Display messages
On-board computer and displays
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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
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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