
Displa
ymessages General notes
Display message sappear in th emultifunction display.
Display messages with graphic displays may be shown in simplified for minthe Owner's Manual
and ma ydiffer from the messages shown in the multifunction display.
Please respond in accordance with the displa ymessages and follow the additional notes in
this Owner's Manual.
Certain display messages are accompanied by an audible warning tone or acontinuou stone.
When you stop and par kthe vehicle, please observe the notes on the HOL Dfunction
(Y page 187 )and parking (Y page 160). Hiding display messages
You can hid esome display messages with alow priority.
X Press the aor% button on the steering wheel to hide the display message.
The display message is cleared.
Displa ymessages with ahigh priority are shown in red.
You cannot hide displa ymessages of the highest priority. The multifunction display shows
these messages continuously until the causes for the messages have been remedied. Message memory
The on-boar dcomputer save scertain display messages. You can call up the display messages
in the message memory .
X Press the =or; button on the steering wheel to select the Serv. menu.
If there are display messages, the multifunction display shows, for example, 2messages .
X Press the 9or: buttontos elect the entry, e.g. 2messages .
X Confirm with a.
X Press the 9or: buttontos croll through the displa ymessages.
When the ignition is switched off ,all displa ymessages are deleted apar tfrom some high-
priority displa ymessages. Once the causes of the high-priorit ydispla ymessages have been
rectified, the corresponding display messages are also deleted. Display messages
253On-boardcomputer and displays Z

Safety systems
Display messages Possible causes/consequences and
M Solutions
!÷
currentl
yunavail‐ able See Owner's
Manual G
Ris
kofa ccident
ABS (Anti-lock Braking System), ESP ®
(Electronic Stability Pro-
gram), BAS (Brake Assist), PRE-SAFE ®
,t he HOL Dfunction, hill
start assis tand ESP ®
trailer stabilisation are temporarily not avail-
able.
The adaptive brake lights ,BAS PLUS and PRE-SAFE ®
Brake may
also have failed.
In addition, the ÷,åand! warning lamps ligh tupin
the instrument cluster.
The self-diagnosis function might not be complete ,for example.
ATTENTION ASSIS Tisdeactivated.
The brak esystem continues to function normally, but without the
functions liste dabove. The wheels could therefore lock if you
brak ehard, for example.
X Carefully drive on asuitable stretch of road, making slight steer-
ing movements, at aspeed above 20 km/h.
If the display message disappears, the functions mentioned
above are available again.
If the display message continues to be displayed:
X Drive on carefully.
X Visit aqualified specialist workshop. G
Risk of accident
ABS ,ESP ®
,B AS ,PRE-SAFE ®
,t he HOL Dfunction, hill start assist
and ESP ®
trailer stabilisation are temporarily not available.
The adaptive brake lights ,BAS PLUS and PRE-SAFE ®
Brake may
also have failed.
In addition, the ÷,åand! warning lamps ligh tupin
the instrument cluster.
For example, the on-board voltage may be insufficient.
ATTENTION ASSIST is deactivated.
The brake system continues to function normally, but without the
functions liste dabove. The wheels could therefore lock if you
brak ehard, for example.
X Drive on carefully.
If the display message disappears, the functions mentioned
above are available again. 254
Display messagesOn-board computer and displays

Displa
ymessages Possible causes/consequences and
M Solutions
If th
edisplay message continues to be displayed:
X Drive on carefully.
X Visit aqualified specialist workshop. !÷
in
operative See Owner'
sManual G
Risk of accident
ABS, ESP ®
,B AS ,PRE-SAFE ®
,t he HOL Dfunction ,hill start assist
and ESP ®
trailer stabilisation are no tavailab ledue to amalfunc-
tion.
The adaptive brake lights, BAS PLUS and PRE-SAFE ®
Brake may
als oh ave failed.
In addition, the J,÷,åand! warning lamp slight
up in the instrument cluster.
The brake system continues to function normally, but without the
functions listed above. The wheels could therefor elock if you
brake hard, for example.
ATTENTION ASSIS Tisd eactivated.
X Drive on carefully.
X Visit aquali fieds pecialist workshop immediately. ÷
currentl
yunavail‐ able See Owner's
Manual G
Ris
kofa ccident
ESP ®
,B AS, PRE- SAFE ®
,t he HOL Dfunction, hill start assis tand
ESP ®
trailer stabilisation are temporarily not available.
The adaptive brake lights ,BAS PLU Sand PRE-SAFE ®
Brak emay
also have failed.
In addition, the ÷andå warning lamps light up in the
instrument cluster.
The self-diagnosis function might not be complete, for example.
ATTENTION ASSIS Tisdeactivated.
The brak esystem continues to function normally, but without the
functions liste dabove.
X Carefull ydrive on asuitable stretc hofroad, makin gslight steer-
ing movements, at aspeed above 20 km/h.
If the display message disappears, the fun ction sm entioned
above are available again.
If the display message continues to be displayed:
X Driv eonc arefully.
X Visit aqualified specialist workshop. Display messages
255On-boardcomputer and displays Z

Displa
ymessages Possible causes/consequences and
M Solutions
÷
in
operative See Owner'
sManual G
Risk of accident
ESP ®
,B AS ,PRE-SAFE ®
,t he HOL Dfunction ,hill start assist and
ESP ®
trailer stabilisation are no tavailab ledue to amalfunction.
The adaptive brake lights, BAS PLUS and PRE-SAFE ®
Brake may
als oh ave failed.
In addition, the ÷andå warning lamp slight up in the
instrument cluster.
ATTENTION ASSIST is deactivated.
The brake system continues to function normally, but without the
functions listed above.
X Driv eonc arefully.
X Visi taq ualifieds pecialist workshop. T!
÷
inoperativ
eSee Owner'
sManual G
Ris
kofa ccident
EB D( electroni cbrake force dist ribution) ,ABS ,ESP ®
,B AS, PRE-
SAFE ®
,t he HOL Dfunction, hill start assist and ESP ®
trailer stabi-
lisation are not available due to amalfunction.
The adaptive brake lights, BAS PLUS and PRE-SAFE ®
Brake may
als oh ave failed.
In addition, the ÷,åand! warning lamp slight up in
the instrument cluster and awarning tone sounds.
ATTENTION ASSIST is deactivated.
The brake system continue stofunction normally, but withou tthe
func tions listed above. The wheels coul dtherefore lock if you
brake hard, for example.
X Drive on carefully.
X Visit aqualified specialist worksho pimmediately. !
Release parking
brake Th
er ed ! indicator lam pflashes and awarning tone sounds.
Ac ondition for automatic release of the electric parkin gbrake is
not fulfill ed (Ypag e161).
Yo ua re driving wit hthe electric parkin gbrake appl ied.
X Release the electric parking brake manually. The red
!indicator lamp flashe sand aw arning tone sounds.
You are making an emergency stop using the electric parking
brake (Y page 161). 256
Display messagesOn-board computer and displays

Displa
ymessages Possible causes/consequences and
M Solutions
!
Pa
rkingb rake See Owner'
sManual Th
ey ellow !warning lamp lights up.
The electric parkin gbrak eism alfunctioning.
To apply:
X Switc hoffthe ignition.
X Press the electric parking brake handle fo ratleast 10 seconds.
X Shif tthe transmission to P.
X Consult aqualified specialist worksho p. The yellow
!warnin glamp and the red !indicator lamp
are lit.
The electric parking brake is malfunctioning.
To release:
X Switch off the ignitio nand turn it back on.
X Releas ethe electric parkin gbrake manu ally.
or
X Release the electric parkin gbrake automatically (Y page 161).
If the yellow !warning lamp remains lit or continues to flash:
X Do not drive on.
X Consult aqualified specialist worksho p. The red
!indicator lam pflashes and the yellow !warning
lamp is lit.
The electric parkin gbrake is malfunctioning.
To rel ease:
X Switch off the ignitio nand turn it back on.
X Releas ethe electric parkin gbrake manu ally.
To apply:
X Switch off the ignitio nand turn it back on.
X Appl ythe electric parkin gbrake manu ally.
If the red !indicator lamp continues to flash:
X Do not drive on.
X Secur ethe vehicle against rolling away (Y page 338).
X Shif tthe transmission to P.
X Tur nthe front wheels towards the kerb.
X Consult aqualified specialist worksho p. Display messages
257On-boardcomputer and displays Z

Displa
ymessages Possible causes/consequences and
M Solutions
The yellow
!warning lamp lights up. The red !indicator
lamp flashes fo rabout 10 seconds after the electric parkin gbrake
ha sb een applied or released. It then goes out or remains lit.
The electric parkin gbrake is malfunctioning.
X Switch off th eignition and tur nitback on.
X Apply the electric parkin gbrake.
If it is not poss ible to apply the electric parkin gbrake:
X Shift th etransmission to P.
X Vis itaq uali fieds pecialist workshop.
If it is not possible to release the electric parkin gbrake:
X Releas ethe elec tricp arkin gbrake automaticall y(Ypage 16 1).
If th eelectric parkin gbrake can stil lnot be released:
X Consult aqualified specialist workshop. The yellow
!warning lamp lights up. If you manually apply or
release the electric parkin gbrake ,the red !indicator lamp
fla shes.
The electric parking brak eismalfunctioning. It is not poss ible to
apply the electric parking brake manu ally.
X Shift the transmission to P.
X Visit aquali fieds pecialist workshop. !
Pk
gb rake inopera‐ tive Th
ey ellow !warning lam plights up. The red !indicator
lamp flashes for about 10 seconds after the electric parkin gbrake
ha sb een applied or released. It then goes out or remains lit.
The electric parkin gbrake is malfunctioning ,e.g. because of over-
voltag eorundervoltage.
X Remove the cause for the overvoltage or undervoltage ,e.g. by
charging the battery or restarting the engine.
X Appl yorr elease the electric parkin gbrake.
If it remains impossibl etoapply or release the electric parking
brake:
X Swit choff the ignition and tur nitback on.
X Apply or release the electric parkin gbrake.
If th eelectric parkin gbrake can stil lnot be released:
X Consult aqualified specialist workshop. 258
Display messagesOn-board computer and displays

Displa
ymessages Possible causes/consequences and
M Solutions
The display message is only shown while th
evehicl eisinm otion.
The red !indicato rlamp flashes and the yellow !warning
lamp is lit.
It is not possible to apply the electric parkin gbrake manually.
X Shift th etransmission to P.
X Visit aqualified specialist workshop. !
Turn on th
eigni‐ tion to release
the parking brake Th
er ed ! indicator lam pislit.
You attempted to release the electric parkin gbrake whil ethe igni-
tion was switched off.
X Key: turnthe key to position 1in the ignition lock.
X KEYLESS-GO: switchont he ignition. J
Chec
kbrake fluid level G
Ris
kofa ccident
There is insufficien tbrake flui dinthe brake flu idreservo ir.Ina ddi-
tion, the red Jwarning lamp in the instrumen tcluster lights
up and awarning tone sounds.
X Pul lover and stop th evehicle safely as soon as possible, paying
attention to road and traffic conditions. Do not continue driv ing
under any circumstances.
X Apply the electric parking brake.
X Consult aqualified specialist worksho p.
X Do not top up the brake fluid. Thi sdoes not correc tthe error. #
Chec
kbrake wear Th
eb rake pa ds/linings have reach edtheir wea rlimit.
X Visit aqualified specialist workshop. PRE-SAFE
inoperativ
eSee Owner's Manual G
Ris
kofi njury
Impor tant functions of PRE-SAFE ®
have failed. All other occupant
safety sys tems,e.g. airbags, remain available.
X Visit aqualified specialist worksho pimmediately. Display mess
ages
259On-boa rd comp uter and displays Z

Displa
ymessages Possible causes/consequences and
M Solutions
PR
E-SAFE Functions cur‐
rently limited See
Owner'
sManual G
Risk of accident
PRE-SAFE ®
Brake is tempora rily inoperative if:
R theD ISTR ONIC PLU Scove rint he ra diatorgrille is di rty.
R the sensor sinthebumpers are dirty.
R itsf unction is impaire ddue to heav yrain or snow.
R ther adar sensor system is temporarily inoperative, e.g. due to
elect romagnetic radiatio nemitted by nearby TV or radio sta-
tions or other source sofelectromagnetic radiation.
R the system is outside the operatin gtemperatur erange.
R the on-board voltage is too low.
PRE-SAFE ®
Brak eiso perational again and the display message
disappears if:
R the dirt (e.g. slush) drops away while the vehicle is in motion.
R the system detects that the sensor sare full yavailable again.
R thes ystem is within the operatin gtemperatur erange.
If the display message continues to be displayed:
X Clean the DISTRONIC PLUS cover in the radiator grille
(Y page 327).
X Clean the bumpers (Y page 327).
X Restart the engine.
X Wait until the batter yissufficiently charged. PRE-SA
FE Functions limited
See Owner's Manual G
Ris
kofa ccident
PRE-SAFE ®
Brak eisf aulty. BA SPLUS or th edistance warnin gsig-
nal may also have failed.
X Visit aqualified specialist workshop. ü If the symbo
lappears in the multifunction display, aseat belt
tongue has been clipped int oarear seat belt buckle.
For further information on the status indicator for the rear seat
belts: (Y page 49). ý G
Risk of inju
ry
If th esymbol appears in the multifunction display, aseat belt
tongue has not been clipped int oarear seat belt buckle.
X If necessary, ask the occupants in the rear to fasten their seat
belts.
For further information on the status indicator for the rear seat
belts: (Y page 49). 260
Display messagesOn-boar
dcomputer and displays