Storing and maintaining the current
speed
XAccelerate the vehicle to the desired speed
above 20 mph (30 km/h).
XBriefly push the cruise control lever up:or
down =.
XRelease the accelerator pedal.
Cruise control is activated. The current speed
is stored and shown briefly in the display's
text field.
The display also shows the Vsymbol and
the stored speed:
Rin the header on vehicles without steering
wheel buttons (Ypage 170)
Rin the status area on vehicles with steering
wheel buttons (Ypage 176)
Resuming the stored speed
GWARNING
If you call up the stored speed and it differs
from the current speed, the vehicle acceler-
ates or decelerates. If you do not know the
stored speed, the vehicle could accelerate or brake unexpectedly. There is arisk of an acci-
dent.
Pay attention to the road and traffic condi-
tions before calling up the stored speed. If you
do not know the stored speed, store the
desired speed again.
XBriefly pull the cruise control lever towards
you ;.
XRelease the accelerator pedal.
Cruise control is activated and resumes the
vehicle's speed to the last speed stored.
The stored speed is shown briefly in the dis-
play.
The display also shows the Vsymbol and
the stored speed:
Rin the header on vehicles without steering
wheel buttons (Ypage 170)
Rin the status area on vehicles with steering
wheel buttons (Ypage 176)
iWhen you pull the cruise control lever
towards you for the first time after startin gthe
engine, cruise control adopts the current
speed.
Setting the speed
It may be amoment before the vehicle starts to
accelerate or brake to the set speed. Take this
delay into account when settingt he speed.
XPress the cruise control lever up:to
increase the speed or down =to reduce the
speed.
The vehicle will accelerate or decelerate. The
speed is shown in the display.
XRelease the cruise control lever once the
desired speed is reached.
The displayed speed is stored.
or
XBriefly press the cruise control lever as far as
the 1st pressure point up :or down =.
The last speed stored is increased/reduced in increments of 1mph (1 km/h).
or
XBriefly press the cruise control lever beyond
the pressure point up :or down =.
The last speed stored is increased/reduced in increments of 5mph (10 km/h).
iCruise control is not deactivated if you
depress the accelerator pedal. If you acceler-
ate briefly to overtake, for example, cruise
control resumes the vehicle’s speed to the
last speed stored after you have finished over-
taking.
To deactivatec ruise control
There are various ways to deactivate cruise con-
trol:
XBriefly press the cruise control lever for-
wards?.
or
XApply the brakes.
The last speed set remains stored. The last
speed stored is deleted when you switch off the
engine.
Cruise control is deactivated automatically
when:
Ryou apply the brakes
Ryou apply the parking brake and the F
(only USA) or J(only Canada) indicator
lamp in the instrumentc luster lights up
Ryou are driving slower than 20 mph (30 km/h)
Ryou shift the automatic transmission to neu-
tral positionNwhile the vehicle is in motion
142Driving systems
Driving and parking
RESP®intervenes or youdeactivate ESP®
Rthere is amalfunctio ninthe ESP®or ABS sys-
tem
If cruis econtro lautomaticall ydeactivates, a
warning tone sounds and the Cruise
ControlOffmessage appearsbriefl yint he display.
The V symbo land the displa yofthe stored
spee dint he header or in the status area of the
displa yarethenn ot shown.
Problems with cruis econtrol
The spee dcanno tbes et when cruis econtro lis
activated.
The displa yisshowing amessage of high priority
and canno ttherefore sho wachange in speed.
XProcee dasinstructed by the message in the
display.
COLLISIO NPREVENTION ASSIST
General notes
COLLISION PREVENTION ASSIST help syou:
Rto minimize the ris kofafront-end collision
with adetecte dobstacle in the path of your
vehicle
Rto reduce the consequences of afront-end
collision
The system uses rada rsensor stod etect vehi-
cle sinf ront.
COLLISION PREVENTION ASSIST consists of the
distance warning functio nand Adaptive Brake
Assist.
If COLLISION PREVENTION ASSIST is malfunc-
tioning ,the displa yshows acorresponding mes-
sage (
Ypage 213).
Distance warning function
Important safety notes
GWARNING
The distance warning functio ndoesn ot react:
Rto people or animals
Rto oncomin gvehicles
Rto crossing traffic
Rwhen cornering
Thus, the distance warning functio ncannot
provid eawarning in al lcritica lsituations.
There is ariskofana ccident.
Alway spaycarefu lattentio ntothe traffics it-
uatio nand be ready to brake.
GWARNING
The distance warning functio ncanno talway s
clearly identify objects and comple xtraffic
situations.
In such cases, the distance warning function
may:
Rgive an unnecessary warning
Rnot give awarning
There is ariskofana ccident.
Alway spaycarefu lattentio ntothe traffics it-
uatio nand do not rel ysolel yont he distance
warning function.
In particular ,the detection of obstacle scan be
impaired in the cas eof:
Rdirt on the sensor soranything else covering
the sensors
Rit is snowing or raining heavily
Rthere is interferenc efromo therradar sources
Rthe possibility of strong rada rreflections, for
example, in parkin ggarages .
Ranarrow vehicl etraveling in front, e.g .a
motorbike
Rav ehicl etraveling in front on adifferent line
Due to the nature of the system ,particularly
complicate dbutnon-critical drivin gconditions
maya lsoc ause the system to displa yawarning.
If yo ufailtoa dapt your drivin gstyle ,the dis-
tance warning functio ncan neitherr educe the
ris kofana ccident nor override the laws of phys-
ics .The distance warning functio ncanno ttake
into account road, weather or trafficc onditions.
The distance warning functio ni
so nlyana id.
You
ar er esponsibl efor the distance to the vehicl ein
front, for vehicl espeed, braking in good time
and for staying in your lane.
Following damage to the front end of the vehicle,
have the configuratio nand operatio nofthe
rada rsensor checked at aquali fied specialist
workshop .Thisa lsoa pplies to collisions at slow
speeds where there is no visible damage to the
front of the vehicle.
Driving system s143
Driving an dparking
Z
On-boardcomputer (vehicles without
steering wheel buttons)
Operating the on-board computer
Overview
:È and 3buttons
;Display
=f and gbuttons
XTo activate the on-board computer: turn
the key to position 1in the ignition lock.
If you remove the key, then quickly re-insert it
and turn to position 1,the on-board computer
and instrument cluster are not activated.
You can control the display and the settings in
the on-board computer with buttons :and =
on the instrument cluster.
Buttons on the instrument cluster
GWARNING
If you are driving and reach through the steer- ing wheel to operate the adjustment knob,
you could lose control of the vehicle. There is
ar isk of an accidenta nd injury.
Only operate the adjustment knobs when the vehicle is stationary. Do not reach through the
steering wheel when driving.
ÈPress briefly:
RSelectst he menu or display
RIn theSettingsmenu: exits the
submenu without adopting the last
setting and return stothe menu's
start screen
ÈPress and hold:
RReturns to the standard display or the Distance menu without adopt-
ing the last setting
3Press briefly:
RSelectsas ubmenu or function
RConfirmsthe selected entry in the
list or the display, or confirms the
setting
3Press and hold:
RResets the trip odometer and trip
computer values
RIn the start screen of the Settingsmenu: resetssettings to the fac-
tory settings
RIn the Settingsmenu: resetsv al-
ues and return stothe menu's start
screen
f
gRSetst he instrument cluster light-
ing (not in the Settingsmenu)
RScrolls through lists
RChanges values or settings
Display
Instrument cluster display
:
Clock (Ypage 186)
V Cruise control (
Ypage 140)
;Permanen tdisplay: outside temperature or
speed (Ypage 174)
170On-boardc omputer (vehicles without steering wheel buttons)
On-boardcomputer and displays
message with3,the display shows the next
submenu.
XPress forg to activate or deactivate ESP.
XPress 3to confirm.
The next submenu is shown in the display.
If the å warning lamp in the instrument
cluster lights up when the vehicleisr eadyto
drive, ESP
®is deactivated.
Observe the informatio nonwarning lamps
(
Ypage 221) and display messages
(Ypage 193).
Setting the sensitivity of the rain sensor
The vehiclem ust be stationary .Use the buttons
in the instrument cluster.
XPress Èto select the Settingsmenu.
XPress3to select the Rain Sensorsub-
menu.
The display shows the current sensitivity set-
ting.
XPress forg to select the Low,Standardor
Sensitivesetting. This setting controls the
rain sensor's sensitivity to precipitation. The
windshieldw iper willthen wip emore or less
frequently at the same precipitation intensity.
XPress 3to confirm.
The next submenu is shown in the display.
You can find further informatio nunder "Wind-
shiel dwiper" (
Ypage 101).
Activating/deactivatin gATTENTION
ASSIST
The vehiclem ust be stationary .Use the buttons
in the instrument cluster.
XPress Èto select the Settingsmenu.
XPress3to select the Attention Assistsubmenu.
The display shows the current status.
If theAttention Assist Inoperative
message is shown in the display ,ATTENTION
ASSIST is not available due to amalfunction
and is deactivated. If you confirm the mes-
sage with 3,the display shows the next sub-
menu.
XPress forg to activate or deactivate
ATTENTION ASSIST.
XPress 3to confirm.
The next submenu is shown in the display. Further informatio
ncan be found under "ATTEN-
TION ASSIST" (
Ypage 149).
Selecting the permanent display func-
tion
With the Permanent Display:function, you
can switch the display in the header between
outsid etemperature and speed.
If the display shows the speed in the header, the
outsid etemperature is shown with the odome-
ters (
Ypage 171).
The additional speedometer unit in the header is
alway sinverse to the speedometer unit.
The vehiclem ust be stationary .Use the buttons
in the instrument cluster.
XUsing Èselect the Settingsmenu.
XUsing3select the Permanent Display:submenu.
The display indicates the selected setting of
Outside Temp.
orSpeedometer.
XChange the setting by pressing forg.
XPress 3to confirm.
The next submenu is shown in the display.
Selecting the unit for the distance
In the Distance Unit:submenu, you can
select whether the display shows certain infor-
mation in kilometers or miles.
The vehiclem ust be stationary .Use the buttons
in the instrument cluster.
XPress Èto select the Settingsmenu.
XPress3to select the Distance Unit:sub-
menu.
The display indicates the selected setting of
km
or Miles.
XChange the setting by pressing forg.
XPress 3to confirm.
The display shows the next submenu or the
Settings
menu again.
The selected distance units are used for the dis- plays:
RDigital speedometer
ROdometer and trip odometer
RTrip computer
RRange
RCurrent consumption
RCruise control
RService intervals
174On-board computer (vehicles without steerin gwheel buttons)
On-board computer and displays
In status areaD,the display can show the sta-
tus of the following driving systems:
À ATTENTION ASSIST(
Ypage 149)
à Lane Keeping Assist (
Ypage 147)
V Cruise control (
Ypage 140)
è Rearwindow wiper (
Ypage 102)
è ECO start/stop function (
Ypage 122)
Menu overview
You can think of the order of the menus as a
circle. Use the =or; steering wheel
buttons to show the menu bar and scroll through
the menus. Use the :or9 steering
wheel buttons to scroll through their submenus and functions.
Operatio ninformation can be found under
"Operating the on-board computer"
(
Ypage 175).
Depending on the vehicle equipment, you can
call up the following menus:
RTripmenu (Ypage 177)
RNavimenu (navigation instructions)
(Ypage 179)
RAudiomenu (Ypage 180)
RTel(telephone) menu (Ypage 181)
RAssist.(assistance) menu (Ypage 182)
RServicemenu (Ypage 184)
RSettingsmenu (Ypage 185)
Trip menu
Standard display
Odometer
XPress and hold the %steering wheel but-
ton until the Tripmenu with trip odometer :
and odometer ;appears.
If the display shows the speed in the header, the
outsid etemperature is additionall ydisplaye don
the lowere dge of display panel =.
You can switch the permanent display in the
header (
Ypage 185).
Displaying the range and current fuel
consumption
Using the steering wheel buttons
XPress =or; to select the Tripmenu.
XPress:or9 to select Range and Con-
sumption.
The approximate range that can be covered is
calculated according to you rcurrent driving
style and the amount of fuel in the tank. If there
is only asmall amount of fuel left in the fuel tank,
the display shows avehicle being refueled Ï
instead of the approximate range.
The fuel consumption display is base donthe
current driving style.
On-board computer (vehicles with steeringw heel buttons)177
On-board computer and displays
Z
Depending on the vehicle’sequipment ,you have
the following options in the Servicemenu:
RCalling up displaymessage sinthe message
memory (Ypage 202)
RRestartin gthe tire pressure loss warning sys-
tem or checking the tire pressure electroni-
cally (
Ypage 274)
RCalling up the servic eduedate (ASSYST
PLUS) (Ypage 248)
Settings menu
Introduction
Depending on the vehicle’ sequipment ,you have
the following options in the Settingsmenu:
Rchanging the displayoptions in the Inst.Clustersubmenu (Ypage 185)
Rchanging the time and date in the Time/Datesubmenu (Ypage 186)
Rchanging the exteriorand interio rlighting set-
ting sint heLightssubmenu (Ypage 186)
Ractivating/deactivating or adjusting vehicle
functions in the Vehiclesubmenu
(Ypage 187)
Rresetting the settings to FactorySetting(Ypage 187)
Instrument cluste rsubmenu
Selecting the uni tfor the distance
With the DisplayUnitS peed-/Odometer:function, yo ucan select whether the display
shows certain informatio ninkilometers or
miles. Using the steerin
gwheel buttons
XPress =or; to select the Settingsmenu.
XPress:or9 to select Inst. Clus‐ter.
XPressato confirm.
XPress :or9 to select the DisplayUnitSpeed-/Odometer:function.
The displa yindicates the selected kmor
Milessetting.
XPress ato change the setting.
The uni tfor the distance will be selecte dfor:
RDigita lspeedom eterint heTripmenu
ROdometer and trip odometer
RTripc omputer
RCurrent consumption and range
RNavigation instructions in the Navimenu
RCruise control
RService intervaldisplay
Settingthe display language
Using the steerin gwheel buttons
XPress =or; to select the Settingsmenu.
XPress:or9 to select Inst. Clus‐ter.
XPressato confirm.
XPress :or9 to select Language:.
The displa yshows the current languag eselec-
tio nfor al ldisplay messages.
XPressato change the setting.
XPress :or9 to select the desired lan-
guage.
XPress the abutton to save the selection.
Selecting the permanent display function
Using the Permanent Display:function, you
can switch the displa yinthe header between
outside temperatur eand speed.
If the displa yshows the spee dinthe header, the
displa yshows the outside temperatur ewitht he
odometers (
Ypage 177). The additional speed-
ometer uni tinthe header is always invers eto
the speedomete runit.
On-board computer (vehicle swiths teering whee lbuttons)18 5
On-board computera nd displays
Z
Display messagesPossible causes/consequences andMSolutions
À
Attent.AsstInoper ‐ative
ATTENTION ASSIST has failed.
XVisitaqualified specialist workshop .
À
Attent.Asst: Tak eBreak!
Based on certain criteria, ATTENTION ASSIST has detecte dfatigue or
al ack of concentration on th epart of th edriver .Ana dditional warning
tone sounds.
XIf necessary, tak eabreak.
During lon gjou rneys, tak eregular breaks in goo dtimesot hatyou get
enough rest.
Cruise Contro l---mphAconditi on for activating cruise control has no tbeen met .
You hav etried to store aspeed belo w20m ph(30 km/ h)for example.
XIf conditions permit, drive faster than 20 mph (30 km/h )and store
the speed.
XCheck the activation conditions for cruis econtrol (Ypag e140).
Tires
Display messagesPossiblec auses/consequence sand MSolutions
Correct Tire Pres‐sureThe tire pressure is too low in at least one of the tires, or the tire
pressure difference between the wheels is too great.
XCheck the tire pressure at the next opportunity (Ypag e274).
XIf necessary, correct the tire pressure.
XRestart the tire pressure monitor (Ypag e277).
CheckTirePressureSoonAn additiona lwarning tone sounds.
The tire pressure in one or more tires has dropped significantly.
GWARNING
Tire pressure that are too low pose the following hazards:
RThe tires may burst, especially as the loa dand vehicl espeed
increase.
RThe tires may wea rexcessively and/or unevenly, which may greatly
impair tire traction.
RThe handling as wel lassteering and braking characteristics may be
severely affected.
There is arisk of an accident.
XStop the vehicl ewithout making any sudden steering or braking
maneuvers. Pay attention to the traffic conditions while doing so.
XSecure the vehicl etoprevent it from rolling away (Ypage132).
XCheck the tires and, if necessary, change the whee l(Ypage286).
XCheck the tire pressure (Ypag e274).
XIf necessary, correct the tire pressure.
Display messages (vehiclesw ithout steering wheel buttons)199
On-board computer and displays
Z
Display messagesPossible causes/consequences andMSolutions
Collision Preven‐tionAssist Cur ‐rentlyUnavail.SeeOper. Manual
COLLISION PREVENTION ASSIST PLU Sistemporarily inoperative.
Possibl ecauses:
RThe sensor sinthefron tbumper are dirty.
RThe function is impaire ddue to heav yrain or snow.
RThe radar sensor system is temporarily inoperative, e.g. due to
electromagneti cradiation emitted by nearby TV or radi ostation sor
other source sofelectromagneti cradiation .
RThe system is outside th eoperating temperature range.
RThe on-boar dvoltag eistoolow.
Once th ecauses listed abov enolonger apply, th edisplay message
goe sout and COLLISION PREVENTION ASSIST is operational again .
If th edisplay message does no tdisappear :
XPull overand stop th evehicle, payin gattention to roa dand traffic
conditions.
XSecur ethe vehicl etopreventitfromr ollin gaway (Ypage 132).
XSwitc hoff th eengine.
XClean th esensor sinthefron tbumper (Ypage 257).
XRestart th eengine.
Lan eKeepin gAssistInoperativeLaneKeepin gAssistisf aulty.
XVisit aqualified specialist workshop .
LaneKeepin gAssistCurrently Unavail.See Oper. Manual
LaneKeepin gAssistisd eactivated and temporarily inoperative. Pos -
sibl ecauses:
RThe windshield is dirty in th ecamera' sfield of vision .
RVisibilityisimpaire ddue to heav yrain ,sno worf og.
RThere are no lan emarking sfor an extended period of time.
RThe lan emarking sare wor naway, dark or covered, e.g. by dir tor
snow.
Once th ecauses listed abov enolonger apply, th edisplay message
goe sout and Lan eKeepin gAssistiso perational again .
If th edisplay message does no tdisappear :
XPull overand stop th evehicle, payin gattention to roa dand traffic
conditions.
XSecur ethe vehicl etopreventitfromr ollin gaway (Ypage 132).
XClean th ewindshield.
Cruise Contro lLDC_Spd_DsrspeedUnit
Aconditi on for activating cruise control has no tbeen met .
You hav etried to store aspeed belo w20m ph(30 km/ h)for example.
XIf conditions permit, drive faster than 20 mph (30 km/h )and store
the speed.
XCheck the activation conditions for cruis econtrol (Ypag e140).
214Display messages (vehiclesw iths teering wheel buttons)
On-board computer and displays