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Setting the brightness
The brightness of the head-up display is auto-
matically adjusted to the surrounding ambi-
ent light. You can also individually adjust the
brightness of the head-up display.
XSwitch on the head-up display
(
Ypage 242).
XPress theòbutton on the steering
wheel to open the menu list.
XPress the :or9 button on the steer-
ing wheel to select the Settings
menu.
XConfirm by pressingaon the steering
wheel.
XUse : or9 to select the Head-up
Displaysubmenu.
XPressato confirm.
XUsing :or9, select the Bright‐
nessfunction.
XPress theabutton to save the setting.
XPress the :or9 button to adjust the
brightness to a level from Level
+5(bright)
to Level -5
(dark).
XPress the aor% button to save the
setting.
Light submenu
Switching the daytime running lamps on/
off
This function is not available in Canada.
XPress the òbutton on the steering
wheel to open the menu list.
XPress the :or9 button on the steer-
ing wheel to select the Settings
menu.
XConfirm by pressingaon the steering
wheel.
XUse : or9 to select the Lights
submenu.
XPressato confirm.
XPress the :or9 button to select the
Daytime Running Lights
function.
If the Daytime Running Lights
function
has been switched on, the cone of light and the
W symbol in the multifunction dis-
play are shown in white.
XPress the abutton to save the setting.
Further information on daytime running
lamps Daytime Running Lights
(Ypage 124).
Instrument cluster submenu
Selecting the distance unit
TheDisplay
UnitSpeed-/Odometerfunc-
tion allows you to choose whether certain
displays appear in kilometers or miles in the
multifunction display.
XPress the òbutton on the steering
wheel to open the menu list.
XPress the :or9 button on the steer-
ing wheel to select the Settings
menu.
XConfirm by pressingaon the steering
wheel.
XUse : or9 to select the Instru‐
ment Clustersubmenu.
XPressato confirm.
XPress :or9 to select the Display
Unit Speed-/Odometerfunction.
The current setting km
orMilesappears.
XPress the abutton to save the setting.
The selected unit of measurement for dis-
tance applies to:
RDigital speedometer in the Tripmenu
ROdometer and the trip odometer
RTrip computer
RCurrent consumption and the range
RNavigation instructions in the Navimenu
RCruise Control
RDISTRONIC PLUS with Steering Assist and
Stop&Go Pilot
RASSYST PLUS service interval display
Switching the additional speedometer
on/off
The Additional Speedometer [km/h]
function allows you to choose whether the
status area in the multifunction display shows
Menus and submenus255
On-board computer and displays
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the speed digitally. The unit in the additional
speedometer is always inverse to the speed-
ometer unit.
XPress theòbutton on the steering
wheel to open the menu list.
XPress :or9 on the steering wheel
to select the Settings
menu.
XConfirm by pressing aon the steering
wheel.
XPress :or9 to select the Instru‐
ment Clustersubmenu.
XPressato confirm.
XUsing :or9, select the Addi‐
tional Speedometer [km/h]function.
The current selection appears.
XTo activate/deactivate: press thea
button again.
Restoring the factory settings
XPress the òbutton on the steering
wheel to open the menu list.
XPress the :or9 button on the steer-
ing wheel to select the Settings
menu.
XConfirm by pressingaon the steering
wheel.
XUse : or9 to select the Factory
Settingssubmenu.
XPressato confirm.
The Reset All Settings?
function
appears.
XPress :or9 to select NoorYes.
XPress ato confirm the selection.
If you have selected Yes
, the multifunction
display shows a confirmation message.
For safety reasons, the Daytime Running
Lightsfunction in theLightssubmenu is
only reset when the vehicle is stationary.
256Menus and submenus
On-board computer and displays
Page 259 of 418

Display messages
Introduction
General notes
Display message sappear in th emultifunction display.
Display message swit hgraphi cdisplays may be shown in simplified form in th eOperator's
Manual and may therefore diffe rfrom th emultifunction display.
Please respon din accordance wit hth edisplay message sand follow th eadditional note sin this
Operator's Manual.
Wit hcertain display messages, you will also hear awarnin gtone .
You can hide th edisplay messages. The display message sare then stored in th emessage
memory. Rectify th ecaus eof adisplay message as soo nas possible.
Whe nyou stop and par kth evehicle, pleas eobserv eth enote son :
RHOLD function (Ypage 194)
RParking(Ypage 172)
Hiding display messages
XPress th ea or% buttonon th esteerin gwheel.
The multifunction display hide sth edisplay message .
High-priorit ydisplay message sare shown in red in th emultifunction display. Some high-pri -
orit ydisplay message scanno tbe hidden .
The multifunction display shows these message scontinuously until th ecauses fo rth emes -
sage shav ebeen remedied.
Message memory
The on-boar dcompute rsaves certain display message sin th emessage memory .You can cal l
up th edisplay messages:
XPress th eò buttonon th esteerin gwhee lto ope nth emen ulist .
XPress :or9 on thesteerin gwhee lto selec tth eServic emenu.
XConfirmby pressing aon thesteerin gwheel.
XPress th e: or9 buttonto selec tth emessage memory.
If there are no display messages, th eNo Messages
display appears in th emultifunction
display.
Whe nthere are display messages, th enumber of stored message sappears .
XPressato confirm .
XPress the: or9 buttonto scroll through th edisplay messages.
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On-board computer and displays
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Safety systems
Display messagesPossible causes/consequences andMSolutions
!÷
Currently Unavail‐
able See Opera‐
tor's Manual
ABS (Anti-lock Brake System), ESP®(Electronic Stability Program),
BAS (Brake Assist), PRE‑ SAFE®, HOLD function, Crosswind Assist,
hill start assist, STEER CONTROL, Active Lane Keeping Assist and
Active Blind Spot Assist are temporarily unavailable.
BAS PLUS with Cross-Traffic Assist, PRE‑SAFE
®Brake, PRE‑ SAFE®
PLUS and COLLISION PREVENTION ASSIST PLUS may also have
failed.
In addition, the ÷and! warning lamps light up in the
instrument cluster.
ATTENTION ASSIST is deactivated.
For example, the on-board voltage may be insufficient.
GWARNING
The brake system continues to function normally, but without the
functions listed above. The wheels could therefore lock if you
brake hard, for example.
The steerability and braking characteristics may be severely affec-
ted. The braking distance in an emergency braking situation can
increase.
If ESP
®is not operational, ESP®is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
XDrive on carefully.
Carefully drive a suitable distance, making slight steering move-
ments at a speed above 12 mph (20 km/h).
If the display message disappears, the functions mentioned
above are available again.
If the multifunction display still shows the display message:
XDrive on carefully.
XVisit a qualified specialist workshop immediately.
!÷
Inoperative See
Operator's Manual
ABS, ESP®, BAS, PRE‑SAFE®, HOLD function, Crosswind Assist,
hill start assist, STEER CONTROL, Active Lane Keeping Assist and Active Blind Spot Assist are unavailable due to a malfunction.
BAS PLUS with Cross-Traffic Assist, PRE‑ SAFE
®Brake, PRE‑SAFE®
PLUS and COLLISION PREVENTION ASSIST PLUS may also have
failed.
The$ (USA only) or J(Canada only), ÷and! warn-
ing lamps in the instrument cluster may also light up.
ATTENTION ASSIST is deactivated.
GWARNING
258Display messages
On-board computer and displays
Page 261 of 418

Display messagesPossible causes/consequences andMSolutions
The brakesystem continues to function normally, but without th e
function slisted above. The wheels could therefore loc kif you
brak ehard, fo rexample.
The steerabilit yand brakin gcharacteristics may be severely affec -
ted. The brakin gdistanc ein an emergenc ybrakin gsituation can
increase .
If ES P
®is no toperational, ES P®is unable to stabiliz eth evehicle.
There is an increase dris kof skiddin gand an accident.
XDrive on carefully.
XVisit aqualified specialist workshop immediately.
÷
Inoperative See
Operator' sManual
ES P®,BAS, PRE ‑SAFE®, HOLD function ,Crosswin dAssist, hill
start assist ,STEE RCONTROL ,Active Lan eKeepin gAssis tand
Active Blind Spot Assis tare unavailable due to amalfunction .
BA SPLU Swit hCross-Traffic Assist, PRE ‑SAFE
®Brake ,PRE ‑S AF E®
PLU Sand COLLISION PREVENTION ASSIST PLU Smay also hav e
failed.
The ÷ warnin glamp also lights up in th einstrumen tcluster.
ATTENTION ASSIST is deactivated.
GWARNIN G
The brakesystem continues to function normally, but without th e
function slisted above.
The brakin gdistanc ein an emergenc ybrakin gsituation can thus
increase .
If ES P
®is no toperational, ES P®is unable to stabiliz eth evehicle.
There is an increase dris kof skiddin gand an accident.
XDrive on carefully.
XVisit aqualified specialist workshop immediately.
Display messages25 9
On-board computer and displays
Z
Page 262 of 418

Display messagesPossible causes/consequences andMSolutions
÷
Currently Unavail‐
ableSee Opera‐
tor's Manual
ES P®,BAS, PRE ‑SAFE®, HOLD function ,Crosswin dAssist, hill
start assist ,STEE RCONTROL ,Active Lan eKeepin gAssis tand
Active Blind Spot Assis tare unavailable due to amalfunction .
BA SPLU Swit hCross-Traffic Assist, PRE ‑SAFE
®Brake ,PRE ‑S AF E®
PLU Sand COLLISION PREVENTION ASSIST PLU Smay also hav e
failed.
The ÷ warnin glamp also lights up in th einstrumen tcluster.
The self-diagnosi sfunction might no tbe complete, fo rexample.
ATTENTION ASSIST is deactivated.
GWARNIN G
The brakesystem continues to function normally, but without th e
function slisted above. The wheels could therefore loc kif you
brak ehard, fo rexample.
The brakin gdistanc ein an emergenc ybrakin gsituation can thus
increase .
If ES P
®is no toperational, ES P®is unable to stabiliz eth evehicle.
There is an increase dris kof skiddin gand an accident.
XCarefull ydrive asuitable distance, makin gslight steerin gmove-
ments at aspeed abov e12 mph (20 km/h).
If th edisplay message disappears, th efunction smentioned
abov eare available again .
If th emultifunction display still shows th edisplay message :
XDrive on carefully.
XVisitaqualified specialist workshop immediately.
260Display messages
On-board computer and displays
Page 263 of 418

Display messagesPossible causes/consequences andMSolutions
T!
÷
Inoperative See
Operator'sManual
EB D(electronic brak eforc edistribution), ABS, ES P®,BAS,
PRE ‑S AF E®,HOLD function ,Crosswin dAssist, hill start assist ,
STEE RCONTROL ,Active Lan eKeepin gAssis tand Active Blind
Spot Assis tare unavailable due to amalfunction .
BA SPLU Swit hCross-Traffic Assist, PRE‑ SAFE
®Brake,PRE ‑S AF E®
PLU Sand COLLISION PREVENTION ASSIST PLU Smay also hav e
failed.
In addition ,th e÷ and! warnin glamp sligh tup in th e
instrumen tcluster and awarnin gtone sounds.
GWARNIN G
The brakesystem continues to function normally, but without th e
function slisted above. The fron tand rear wheels could therefore
loc kif you brak ehard, fo rexample.
The steerabilit yand brakin gcharacteristics may be severely affec -
ted. The brakin gdistanc ein an emergenc ybrakin gsituation can
increase .
If ES P
®is no toperational, ES P®is unable to stabiliz eth evehicle.
There is an increase dris kof skiddin gand an accident.
XDrive on carefully.
XVisit aqualified specialist workshop immediately.
F(USA
only)
!(Canada
only)
Tur nOn the Igni‐
tio nto Releas e
the Parkin gBrake
The red F(USAonly) or !(Canada only) indicato rlamp
lights up.
You attempte dto release th eelectric parkin gbrak ewhile th eigni-
tion was switched off.
XSwitc hon th eignition .
F(USA
only)
!(Canada
only)
Please Releas e
ParkingBrake
The red F(USAonly) or !(Canada only) indicato rlamp
flashes and awarnin gtone sounds. Acondition fo rautomati c
release of th eelectric parkin gbrak eis no tfulfilled (
Ypage 174).
You are drivin gwit hth eelectric parkin gbrak eapplied.
XReleas eth eelectric parkin gbrak emanually.
The red F(USAonly) or !(Canada only) indicato rlamp
flashes and awarnin gtone sounds.
You are usin gth eelectric parkin gbrak efo remergenc ybrakin g
(
Ypage 174).
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Display messagesPossible causes/consequences andMSolutions
F(USA
only)
!(Canada
only)
Parkin gBrake See
Operator' sManual
The yello w! warnin glamp lights up.
The electric parkin gbrak eis malfunctioning.
To apply:
XSwitc hth eignition off.
XPress th eelectric parkin gbrak ehandle fo rat leas tte nseconds.
XShift th etransmissio nto position P.
XConsultaqualified specialist workshop .
The yellow! warnin glamp and th ered F (USAonly)
or ! (Canada only) indicato rlamp ligh tup.
The electric parkin gbrak eis malfunctioning.
To release:
XSwitc hof fth eignition and tur nit bac kon .
XReleas eth eelectric parkin gbrak emanually.
or
XReleas eth eelectric parkin gbrak eautomatically (Ypage 174).
If th eelectric parkin gbrak estill canno tbe released:
XDo no tdrive on .
XConsult aqualified specialist workshop .
The redF(USAonly) or !(Canada only) indicato rlamp
flashes and th eyello w! warnin glamp lights up.
The electric parkin gbrak eis malfunctioning.
To release:
XSwitc hof fth eignition and tur nit bac kon .
XReleas eth eelectric parkin gbrak emanually.
To apply:
XSwitc hof fth eignition and tur nit bac kon .
XApply th eelectric parkin gbrak emanually.
If th ered F (USAonly) or !(Canada only) indicato rlamp
continues to flash:
XDo no tdrive on .
XSecureth evehicl eagainst rollin gaway (Ypage 396).
XShift th etransmissio nto position P.
XTurnth efron twheels toward sth ecurb.
XConsult aqualified specialist workshop .
262Display messages
On-board computer and displays