ing, the system recognizes certain conditions
and warns you accordingly.
The warningvibration occurs earlier if:
Ryou approacht he outer lane marking on a
bend.
Rthe road has very wide lanes, e.g. afreeway.
Rthe system recognizes solid lane markings.
The warnin gvibration occurs later if:
Rthe road has narrow lanes.
Ryou cut the corner on abend.
Alertness Assistant ATTENTION
ASSIST
General notes
ATTENTIONA SSISTh elps you duringl ong,
monotonous journeys such as on freeways and
interstate highways. It is active in the 40 mph
(60 km/h) to 125 mph (200 km/h )range. If
ATTENTIONA SSISTd etect stypical indicator sof
fatigue or increasingl apses in concentration on
the part of the driver, it suggestst akingabreak.
Important safetyn otes
ATTENTIONASSISTiso nly an aid. The system
may not always detect fatigue or lapses in con-
centration until too late, or may not detect them
at all. ATTENTIONA SSISTisn otas ubstitut efor
aw ell-rested and attentive driver.
The functionality of ATTENTIONA SSISTi s
restricted, and warnings may be delayed or not
occur at all:
Rif the lengt hofthe journey is less than approx-
imately 30 minutes
Rif the road condition is poor, e.g. if the surface is uneven or if there are potholes
Rif there is astrong side wind
Rif you have adopte dasportyd rivings tyle with
high cornering speeds or high rate sofaccel-
eration
Rif you are predominantly drivingatas peed
below 40 mph (6 0km/ h)or above 125 mph
(200 km/h)
Rif the tim ehas been set incorrectly
Rin active drivings ituations,such as when you
change lanes or change your speed ATTENTIONA
SSISTisr eset and starts assessing
your attention again when you continue your
journey if:
Ryou switc hoff the engine
Ryou tak eoff your seat belt and open the driv-
er's door, e.g. for achange of drivers or to
tak eab reak
Displaying th eattention level
For vehicles with steeringw heel buttons you can
have the current ATTENTIONA SSIST( Attention
Level) assessmentd isplayed.
XSelectStatus Overviewin theAssist.menua nd display the attention level
(Ypage 183).
The followingi nformation is displayed:
Rthe lengthofthe journey sinc ethe last break
Rthe attention level determined by ATTENTION
ASSIST, displayed in abar display in five levels
froml ow to high
Rif ATTENTIONA SSISTisu nable to calculate
the attention level and cannot output awarn-
ing, the System
Passivemessage appears in
the display. The bar display is the ndimmed.
This is the case, for example, if you are pre-
dominantly drivingatas peed below 40 mph
(60 km/h) or above 125 mph (200 km/h).
Activating ATTENTION ASSIST
XActivatin gATTENTIONA SSISTw ith the on-
board computer:
Ron vehicles without steeringw heel buttons
(Ypage 174)
Ron vehicles with steeringw heel buttons
(Ypage 184)
For vehicles with steeringw heel buttons,the
system determines the attention level of the
driverd epending on the settin gselected:
Driving systems149
Driving and parking
Z
Standard:the sensitivity with which the sys-
tem determines the attention level is set to
normal.
Sensitive: the sensitivity is set higher. The
driver is warned earlier.
When ATTENTION ASSIST is switched on and
the vehicle engine is running:
Ron vehicles without steering wheel buttons,
the À indicator lamp in the instrument
cluster lights up
Ron vehicles with steering-wheel buttons, the
display shows the Àsymbol:
-in the status area
-in the Status Overviewof the Assist.menu (Ypage 183)
For vehicles with steering wheel buttons, if you
deactivate ATTENTION ASSIST, the system is
automatically re-activated when you start the
engine. The system sensitivity then corresponds to the last selection activated –standard or sen-
sitive.
If you switch off ATTENTION ASSIST in avehicle
without steering wheel buttons, the system
remains switched off even after you start the
engine. The status of the system after switching
on the engine always corresponds to the status
last selected.
Warning in the display
If the system detectst iredness or increasing
lapses in concentration, the warning Atten‐
tion Assist: TakeaBreak!orAttent.Asst: Take Break!is shown in the display.
An additional warning tone sounds.
XIf necessary, take abreak.
XConfirm the message by pressing the a
button on the steering wheel.
On long journeys, take regular breaks in good
time to allow yourself to rest. If you do not take
ab reak and ATTENTION ASSIST continues to
detect increasing lapses in concentration, you
will be warned again after 15 minutes at the
earliest. This will only happen if ATTEN-
TION ASSIST still detectst ypical indicators of
fatigue or increasing lapses in concentration.
PARKTRONIC
General notes
PARKTRONIC is an electronic parking aid. The
system is equipped with ultrasonic sensors in
the front and rear bumpers to monitor the area
around your vehicle. PARKTRONIC indicates vis-
uallya nd audibly the distance between your
vehicle and an object.
Your vehicle features two separate sound emit-
ters with different frequencies for the warning
tones. The warning ranges in front of and behind the vehicle are indicated by different warning
tones.
PARKTRONIC is activated automatically when
you:
Rturn the key to position 2in the ignition lock
Rrelease the parking brake and
Rmove the selector lever to D,Nor R
PARKTRONIC is deactivated at speeds above
11 mph (18 km/h). PARKTRONIC is reactivated
at speeds below 10 mph (16 km/h).
Important safety notes
PARKTRONIC is only an aid. It cannot replace
your own awareness of the immediate surround-
ings. You are responsible for safe maneuvering,
parking and pulling away.W hen maneuvering,
parking and pulling away,m ake sure that there
are no persons, animals or object sinthe maneu-
vering area.
!Pay particular attention to obstacles above
or below the sensors when parking, such as
flower pots or trailer towbars. PARKTRONIC
does not recognizes uch objectswhen they
are in the immediate vicinity of the vehicle.
You could damage the vehicle or objects.
PARKTRONIC can suffer interference from:
Rultrasonic sources such as atruck's
compressed-air brakes, an automatic car
wash or apneumatic drill
Rattachments to the vehicle, e.g. rear moun-
ted racks
Rnumber plates (vehicle license plates) that
are not affixed flat against the bumper
Rdirty or icy sensors
Remove adetachable trailer coupling if it is no
longer required. PARKTRONIC measures the
minimum detection range to an obstacle from
the bumper, not the ball coupling.
150Driving systems
Driving and parking
Useful information
This Operator's Manual describes all models as
well as standard and optional equipment of your
vehicle that were available at the time of going
to print.Country-specific variation sare possi-
ble. Note that your vehicle may not be equipped
with all of the described functions. This also
applies to system sand function srelevantt o
safety.
Read the information on qualified specialist
workshops (
Ypage 29).
Important safetyn otes
GWARNING
If you operate information system sand com-
munication equipment integrated in the vehi-
cle while driving, you will be distracted from
traffic conditions. You could also lose control
of the vehicle. There is arisk of an accident.
Only operate the equipment when the traffic
situatio npermits. If you are not sure that this
is possible, park the vehicle paying attention
to traffic condition sand operate the equip-
ment when the vehicle is stationary.
GWARNING
If you are drivinga nd reach through the steer-
ing wheel to operate the adjustment knob,
you could lose contro lofthe vehicle. There is
ar isk of an acciden tand injury.
Only operate the adjustment knobs when the vehicle is stationary. Do not reach through the
steering wheel when driving.
You must observet he legal requirements for the
country in which you are currently drivingw hen
operatin gthe on-board computer.
GWARNING
If the instrumentc luster has failed or mal-
functioned, you may not recogniz efunction
restrictions in system srelevanttos afety. The
operatin gsafetyofy our vehicle may be
impaired. There is arisk of an accident.
Driv eonc arefully. Have the vehicle checked
at aq ualified specialist workshop immedi-
ately.
The on-board computer display only shows mes-
sages and warnings from certain systems. You
should therefore make sure your vehicle is oper-
ating safely at all times .Ifthe operatin gsafetyo f
your vehicle is impaired, stop the vehicle as
soon as possible, paying attention to road and
traffic conditions. Then consult aqualified spe-
cialist workshop.
The accurac yofthe speedometer and odometer
displays is legally prescribed. Determining the
speed is dependen tonthe wheel size or the
rolling circumference of the wheels. If you
change the wheel size on your vehicle, make
sure it is assigned to the correct wheel size cat-
egory (
Ypage 267). If you change wheel size
category without recoding the contro lunit, the
speedometer indication will be inaccurate. Driv-
ing safetya nd drivings ystemsmay be impaired
or detec tamalfunction and shut down.
An overview of the instrumentc luster can be
found under "Instrumentc luster":
Rfor vehicles without steering wheel buttons
(Ypage 35)
Rfor vehicles with steering wheel buttons
(Ypage 37)
Display and operation
Instrument lighting
Brightness controlkno b( example: vehicle with
steering wheel buttons)
In daylight, the displays in the instrumentc luster
are illuminated. Adimmingf unction is not pos-
sible in daylight.
168Display and operation
On-boardc omputer and displays
On vehicles with steering wheel buttons, the
light sensor in the instrument cluster automati-
cally controls the brightness of the displaylight-
ing.
While the lights are on, the brightness is depend-
ent upon the brightness of the ambient light.
You can also adjust the brightness of the instru-
ment lighting and the displayl ighting
Rby pressing thefand gbuttons on the
instrument cluster on vehicles without steer-
ing wheel buttons (not in the Settings
menu)
Rby turning control:on vehicles with steer-
ing wheel buttons.
Speedometer
If you change the wheel size on your vehicle,
make sure it is assigned to the correct wheel
size category (
Ypage 267). If you change wheel
size category without recoding the control unit,
the speedometer indication will be inaccurate.
The current vehicle speed may then be higher
than the speed displayed in the speedometer.
The speed can also be shown in the displayi n
the form of adigital speedometer:
Ron vehicles without steering wheel buttons
(Ypage 172)
Ron vehicles with steering wheel buttons
(Ypage 178)
iIn some countries, awarning sounds and/or
the displays howsamessage when the vehi-
cle reaches the maximum legally permissible
speed limit, e.g. at 75 mph (120 km/h).
Tachometer
!
Do not drive in the overrevving range, as this
could damage the engine.
HEnvironmental note
Avoid driving at high engine speeds. This
unnecessarily increases the fuel consumption
of your vehicle and harms the environment as
ar esult of increased emissions.
The red band in the tachometer indicates the
engine's overrevving range.
To protect the engine, the fuel supply is inter-
rupted when the red band is reached.
Outside temperatured isplay
You should pay special attention to road condi-
tions when temperatures are around freezing
point.
Please bear in mind that the outside tempera-
ture displayshows the air temperature meas-
ured and not the road temperature.
The displays hows the outside temperature in
the header:
Ron vehicles without steering-wheel buttons
(Ypage 170)
Ron vehicles with steering wheel buttons
(Ypage 176).
Changes in the outside temperature are dis-
played after ashort delay.
Coolant temperatureg auge
GWARNING
Opening the hood when the engine is over-
heated or when there is afire in the engine
compartment could expose you to hot gases
or other service products. There is arisk of
injury.
Let an overheated engine cool down before
opening the hood. If there is afire in the
engine compartment,k eep the hood closed
and contact the fire department.
On vehicles without steering wheel buttons, you
can have the coolant temperature shown in the
display(
Ypage 172).
On vehicles with steering wheel buttons, an ana-
log coolant temperature gage is located in the
tachometer in the instrument cluster
(
Ypage 37).
Under normal operating conditions and with the
specified coolant level, the gage may rise to
248 ‡(120† ).
Display and operation169
On-board computer and displays
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
120km/h!(only for certain countries) max-
imum permissibles peed exceeded
=Display panel for displaym essages, menus
and menu bar
?Transmission position (Ypage 127)
AFuel level
Bè ECO start/stop function
(Ypage 122)
Cè Rear window wiper (Ypage 102)
Display panel =shows the selected menu or
submenu and displaym essages.
Menu overview
TheSettingsmenu is only displayed when the
vehicle is stationary. You can think of the order
of the menus and functions as acircle. Press È
on the instrument cluster to scroll through the
menus.
If you scroll forward in the Settings
menu using
3,t he setting from the previous submenu or
function is adopted.
If you press Èinas ubmenu, the submenu or
function is exited without adopting the setting.
The displayt hen shows the start screen of the
Settings
menu.
Operation information can be found under
"Operating the on-board computer"
(
Ypage 170).
Depending on the vehicle equipment, you can
call up the following menus, displays or func-
tions:
Rtrip odometer and odometer display
(Ypage 171)
Rtrip computer display(Ypage 171)
Rcurrent range display(Ypage 172)
Rcurrent fuel consumption display
(Ypage 172)
Rdigital speedometer (Ypage 172)
Rcoolant temperature gage (Ypage 172)
Rdisplaym essages in the message memory
(Ypage 188)
The following menus, displays and functions are only displayed when the vehicle is stationary:
Rnext service due date display(Ypage 248)
Rtire pressure monitor restart (Ypage 274)
RSettingsmenu for setting or activating/
deactivating driving and driving assistance systems as well as displayo
ptions
(
Ypage 173)
Distance menu
Odometer
If the displays hows the speed in the header, the
displayb eside trip odometer :also shows the
outside temperature.
You can switch the permanent displayint he
header (
Ypage 174).
Using the buttons in the instrument cluster
XTo display: press and hold Èuntil the dis-
play shows trip odometer :and odome-
ter ;.
XTo reset: press and hold 3until the trip
odometer is reset to 0.0
.
You can set the unit of measurement for the trip
odometer in the Distance Unit:
submenu
(Ypage 174).
Trip computer menu
Trip computer
:
Distance
;Length of journey
=Average fuel consumption
?Average speed
On-board computer (vehicles without steering wheelb uttons)171
On-board computer and displays
Z
Use the buttons in the instrument cluster.
XTo display:pressÈto select the trip com-
puter display.
The valuesd isplayed relate to those meas-
ured since the trip computer was last reset.
XTo reset values: press and hold3until all
valuesa re reset.
The trip computer is automaticallyr eset if the
value exceeds 9,999 hours or 99,999 miles.
You can set the unit of measurement for con-
sumption and distance in the Distance Unit:
submenu (Ypage 174).
Range menu
Use the buttons in the instrument cluster.
XPressÈto select the Rangedisplay.
The approximate range that can be covered is calculated according to your current driving
style and the amount of fuel in the tank. If
there is only asmall amount of fuel left in the
fuel tank, the displays howsavehicle being
refueled Ïinstead of the approximate
range.
You can set the unit of measurement for dis-
tance in the Distance Unit:
submenu
(Ypage 174).
Current fuel consumption menu
Use the buttons in the instrument cluster.
XPress Èto select the fuel consumption bar
display.
The fuel consumption displayisb ased on the
current driving style.
You can set the unit of measurement for con-
sumption in the Distance Unit:
submenu
(Ypage 174).
Digital speedometer menu
Use the buttons in the instrument cluster.
XPress Èto select the speed display.
You can set the unit for the digital speedometer
in the Distance
Unit:submenu (Ypage 174).
Coolant temperaturem enu
GWARNING
Opening the hood when the engine is over-
heated or when there is afire in the engine
compartment could expose you to hot gases
or other service products. There is arisk of
injury.
Let an overheated engine cool down before
opening the hood. If there is afire in the
engine compartment,k eep the hood closed
and contact the fire department.
Use the buttons in the instrument cluster.
XPress Èto select the ?coolant temper-
ature bar display.
Under normal operating conditions and with the
specified coolant level, the gage may rise to
248 ‡(120 †).
172On-board computer (vehicles without steering wheelb uttons)
On-board computer and displays
Settings menu
Introduction
Settings menu start screen
The vehicle must be stationary. Use the buttons
in the instrumentc luster.
XTo display:pressÈto select the Settingsmenu.
The Settings
menu is only displayed when the
vehicle is stationary. You can think of the order
of the submenus and functions as acircle. Press
3 on the instrumentc luster to scroll through
the menu, startin gwith its start screen and
select its submenus or functions successively.
If you scroll forward using 3,the settingf rom
the previous submenu or function is adopted.
If you press Èinas ubmenu, the submenu or
function is exited without adopting the setting.
The display then shows the start screen of the
Settings
menu.
Depending on the vehicle’s equipment, you have the following options in the Settings
menu:
RSetting the language for the display messages
and displays(Ypage 173)
RDeactivating and activating ESP®
(Ypage 173)
RSetting the sensitivity of the rain sensor
(Ypage 174)
RActivating and deactivating ATTENTION
ASSIST (Ypage 174)
RSelectingthe permanent display in the header
of the display (Ypage 174)
RSetting the unit for distance, consumption
and speed displays(Ypage 174)
RSetting the time and date (Ypage 175).
XTo reset settings to the factory settings:
turn the key to position 1in the ignition lock
and press and hold 3in the Settings
menu
for at least five seconds.
For safety reasons, not all functions are reset.
Setting the display language
The vehicle must be stationary. Use the buttons
in the instrumentc luster.
XPressÈto select the Settingsmenu.
XPress3to select the Languagesubmenu.
The display shows the current language selec- tion.
XPress forg to set the language for all dis-
play messages.
XPress 3to confirm.
The next submenu is shown in the display.
Deactivating/activating ESP®
This menu is only available on vehicles without
the å button on the center console.
Please observe the important safety notes
under "ESP
®(Electronic Stability Program)"
(Ypage 64).
GWARNING
If you deactivate ESP
®,E SP®no longer sta-
bilizes the vehicle. There is an increased risk
of skidding and an accident.
Only deactivate ESP
®in the situations descri-
bed in the following.
It may be best to deactivate ESP
®in the follow-
ing situations:
Rwhen using snow chains
Rin deep snow
Ron sand or gravel
Further information can be found under "ESP®
(Electronic Stability Program)" (Ypage 64).
The vehicle must be stationary and the engine
must be running. Use the buttons in the instru-
ment cluster.
XPress Èto select the Settingsmenu.
XPress3to select the ESPsubmenu.
The display shows the current status.
If the display shows the Oper.
OnlyPoss.WithEngineOnmessage, confirm the mes-
sage with 3and start the engine. The display
then shows the ESP
submenu and the ESP®
status.
If theESP
Inoperativemessage is shown in
the display,E SP is not available due to amal-
function and is deactivated. If you confirm the
On-board computer (vehicles without steering wheel buttons)173
On-board computer and displays
Z