
Instrument lighting
When the lights are switched on, you can
adjust the brightness of the instrument clus-
ter lighting using the 0074and 0075buttons.
X To brighten: press the0074button.
X To dim: press the 0075button.
i Vehicles with automatic headlamp mode:
the instrument lighting also adapts to auto-
matic headlamp mode. Tachometer
! Do not drive in the overrevving range, as
this could damage the engine. H
Environmental note
Avoid driving at high engine speeds. This
unnecessarily increases the fuel consumption
of your vehicle and harms the environment as
a result 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 temperature
You should pay special attention to road con-
ditions when temperatures are around the
freezing point.
On vehicles without steering wheel buttons
(Y page 184) and on vehicles with steering
wheel buttons (Y page 189), the outside tem-
perature display is in the display.
Changes in the outside temperature are dis-
played after a short delay. Speedometer
The speed can also be shown in the display.
You can find information on the digital speed-
ometer for vehicles without steering wheel
buttons under (Y page 184) and for vehicles with steering wheel buttons under
(Y
page 189).
i In some countries, a warning sounds
when the vehicle reaches the maximum
speed limit, e.g. at 75 mph ( 120 km/h). Trip odometer
X To reset: make sure that the display is
showing the trip odometer if you have a
vehicle with steering wheel buttons
(Y page 189).
X Press and hold the 0045reset button until the
trip odometer is reset to 0.0 0.0. Fuel gage
0043
Fuel gage on vehicles without steering
wheel buttons
0044 Fuel gage on vehicles with steering wheel
buttons
0087 Fuel filler flap location indicator 007F: the
fuel filler flap is on the left-hand side. Fuel
filler flap location indicator 0080: the fuel
filler flap is on the right-hand side
0085 Reserve fuel warning lamp (Y page 227) Instrument cluster
183On-board computer and displays Z 

DEF gauge
Vehicles without steering wheel but-
tons If the supply of DEF is less than 1.5 US gal
(5.5 l), the 00E2indicator lamp lights up and
the 0099 dEF Chk
dEF Chk display message appears.
If the supply of DEF falls below the reserve
range of 0.8 US gal (3.0 l), the 00E2indicator
lamp lights up and the 0099StArtS RExx
StArtS RExx
display message appears. In the display, xx
xx
corresponds to the number of possible
remaining engine starts (16 16to0
0).
Further information on DEF consumption can
be found in the "Service products and filling
capacity" section (Y page 324).
Vehicles with steering wheel buttons If the supply of DEF is less than 1.5 US gal
(5.5 l), the Check Diesel Exhaust Fluid
Check Diesel Exhaust Fluid
See
See Operator's
Operator's Manual
Manualmessage is shown
in the display.
If the supply of DEF falls below the reserve
range of 0.8 US gal (3.0 l), the 00E2xx
xx
starts remaining starts remaining message is displayed. In
the display, xx
xxcorresponds to the number of
possible remaining engine starts ( 16
16to0
0).
Further information on DEF consumption can
be found in the "Service products and filling
capacity" section (Y page 324).On-board computer (vehicles without
steering wheel buttons) Operating the on-board computer
General notes The on-board computer is activated as soon
as you turn the key to position 1in the ignition
lock.
The on-board computer shows vehicle infor-
mation and settings in the display. You can control the display and the settings
in the on-board computer using the adjust-
ment buttons on the instrument cluster.
Standard display
0043
Odometer
0044 Trip odometer
0087 Clock
0085 Outside temperature or digital speedom-
eter
0083 Fuel gage (Y page 183)
0084 Selector lever position or current shift
range with automatic transmission
(Ypage 144)
X To call up the standard display: turn the
key to position 2in the ignition lock.
X Press the 0079menu button for longer than
one second.
The information shown in the display
changes from the outside temperature to
the digital speedometer. Menus in the on-board computer
Overview If you wish to exit a menu and go to the stand-
ard display:
X
Press the 0079menu button for longer than
1 second.
Or
X Do not press any button for 10 seconds.
The display accepts the changed settings. 184
On-boa
rdcompu ter (vehicles without steering wheel buttons)On-board computer and displays 

Using the
0074,0075,0079or0045 adjustment but-
tons, you can select the following functions:
R Calling up the service due date
(Y page 260)
R Checking the oil level (Y page 252)
R Checking the DEF supply (Y page 184)
R Preselecting/setting the auxiliary heating
switch-on time (Y page 124)
R Tire pressure monitor (Y page 293)
R Setting the time (Y page 185)
R Activating/deactivating Highbeam Assist
(Y page 194)
R Setting the daytime running lamps
(Y page 185)
Setting the time X
Turn the key to position 2in the ignition
lock.
X Press the 0079menu button repeatedly until
the hours figure flashes.
X Press the 0074or0075 button to set the hour.
X Press the 0045reset button.
The minute display flashes.
X Press the 0074or0075 button to set the minute.
i If you keep the 0074or0075 button pressed,
the value will change continuously.
Activating/deactivating Highbeam
Assist X
Turn the key to position 2in the ignition
lock.
X Press the 0079menu button repeatedly until
the 00CE indicator lamp flashes and the
on
on orOFF
OFF message appears in the display.
X Use the 0074or0075 button to switch High-
beam Assist on/off.
Switching the daytime running lamps
on/off If you switch the daytime running lights
ON ON,
the daytime running lights will automatically
light up when the engine is running. For safety reasons, it is only possible to
change this setting when the vehicle is sta-
tionary. The factory setting is
ON ONin countries
in which constant headlamp mode or daytime
running lights are mandatory.
X Turn the key to position 2in the ignition
lock.
X Press the 0079menu button repeatedly until
the 0058 indicator lamp flashes and the
on on orOFF
OFF message appears in the display.
X Press the 0074or0075 button to activate or
deactivate the daytime running lamps.
i USA only:
If you turn the light switch to 0060or
0058, the corresponding light switches on.
If you turn the light switch to 0058, the
daytime running lamps remain switched
on.
Canada only:
If you turn the light switch to 0058, the low-
beam headlamps switch on. If you turn the
light switch to 0060or0058, the daytime
running lamps remain switched on. On-board computer (vehicles without steering wheel buttons)
185On-board computer and displays Z 

On-board computer (vehicles with
steering wheel buttons) Operating the on-board computer
Overview X
To activate the on-board computer: turn
the key to position 1in the ignition lock.
The on-board computer is activated as soon
as you turn the key to position 1in the ignition
lock.
The on-board computer shows vehicle infor-
mation and settings in the display.
You can control the display and the settings
in the on-board computer with the buttons on
the steering wheel.
Steering wheel buttons 0043
Display
On-board computer operation 0044
0081
and0082
R Selects submenus
R Changes values
R Adjusts the volume
Using the telephone
0061 Accepts a call
0076 Ends a call 0087
Scrolls from one menu to another
0080
Forwards
007F Back
Scrolls within a menu
0041 Forwards
0068 Back Controls
You can think of the order of the menus and
of the functions within a menu as a circle:
X
Press the 0080or007F button repeatedly.
The menus are displayed one after the
other.
X Press the 0068or0041 button repeatedly.
The functions in the menu/submenu are
displayed one after the other.
Several functions are combined thematically
in the menus.
The display changes when you press one of
the buttons on the steering wheel. You can
use a function to call up information or to
change the settings for the vehicle.
For example, the AUDIOmenu has functions
for controlling the radio or CD player.
Unlike in other menus, you will find submenus
in the Settings Settings menu. For information on
how to use these submenus, see the "Set-
tings menu" section (Y page 190) .
The number of menus depends on your vehi-
cle's equipment.
i Operation of the audio equipment using
the steering wheel buttons and making set-
tings using the AUDIOmenu only function 186
On-board computer (vehicles with steering wheel buttons)On-board computer and displays 

Using the steering wheel buttons
X
Switch on the audio equipment (see the
separate operating instructions).
X Press the 0080or007F button repeatedly
until the station selected appears in the
display.
The type of search depends on the setting
of the radio station selection
(Y page 196): the nearest stored station
will be selected or the station search starts.
X Press the 0041or0068 button to select the
desired station.
i You can only store new stations on the
audio system itself. See the separate oper-
ating instructions.
You can also operate the audio equipment
in the same way as usual.
Operating the CD player 0043
Current CD (with CD changer)
0044 Current track
Using the steering wheel buttons
X Switch on the audio equipment and select
the CD player (see the separate operating
instructions).
X Press the 0080or007F button repeatedly
until the settings for the current CD appear
in the display.
X Press the 0041or0068 button to select a
CD track. Settings menu
Introduction In the
Settings menu, the following options
and submenus are available:
R Resetting all settings
R Resetting the functions of a submenu
R Instrument cluster (Y page 191)
- Units and language settings
- Status bar settings
R Clock(Y page 193)
R Lighting (Y page 194)
- Switching surround lighting on/off
- Switching the daytime running lamps
on/off
- Setting the exterior lighting delayed
switch-off
- Activating/deactivating Highbeam
Assist
R Vehicle (Y page 196)
- Setting the radio station selection
- Setting the windshield wiper sensitivity
R Stationary heating or auxiliary heating
(Y page 124)
R Convenience (Y page 196)
- Key-dependent settings
i For safety reasons, it is not possible to
reset all of the functions while the vehicle
is in motion. For example, in the Light‐ Light‐
ing
ing submenu, the Daytime runn. lamps
Daytime runn. lamps
function remains unchanged.
Resetting all settings Settings menu190
On-board computer (vehicles with steering wheel buttons)On-board computer and displays 

When the
Settings
Settings message is displayed,
you can reset all functions of the submenu to
the factory settings.
Using the steering wheel buttons
X Press the 0080or007F button repeatedly
until the Settings
Settings menu appears in the
display.
X Press and hold the 0045reset button for
approximately 3 seconds.
You will see a message in the display
prompting you to press the 0045reset button
again to confirm.
X Press the 0045reset button again.
The functions in all submenus are reset to
the factory settings.
i If you want to retain the settings, do not
press the 0045reset button a second time.
The Settings
Settings menu appears again after
approximately 5 seconds.
Resetting the functions of a submenu You can individually reset the functions of
each submenu to the factory settings.
Using the steering wheel buttons
X Press the 0080or007F button repeatedly
until the Settings
Settings menu appears in the
display.
X Press the 0063button to switch to the sub-
menu selection.
X Press the 0081or0082 button to select a
submenu.
X Press and hold the 0045reset button for
approximately 3 seconds.
You will see a message in the display
prompting you to press the 0045reset button
again to confirm.
X Press the 0045reset button again.
All functions in the submenu are reset to
the factory settings.
i If you want to retain the settings, do not
press the 0045reset button a second time. The
Settings
Settings menu appears again after
approximately 5 seconds.
Selecting submenus You will see the collection of submenus.
There are more submenus than can be dis-
played at the same time.
Using the steering wheel buttons
X
Press the 0080or007F button repeatedly
until the Settings Settings menu appears in the
display.
X Press the 0063button to switch to the sub-
menu selection.
X Press the 0081or0082 button to select a
submenu.
The submenu currently selected is high-
lighted.
X Press the 0063button to select the func-
tion within a submenu.
X Change the setting by pressing the 0081or
0082 button.
The changed setting is saved.
Instrument cluster submenu Selecting the unit for temperatureOn-board computer (vehicles with steering wheel buttons)
191On-board computer and displays Z 

Selecting the time format
Using the steering wheel buttons
X
Press the 0080or007F button repeatedly
until the Settings
Settings menu appears in the
display.
X Press the 0063button to switch to the sub-
menu selection.
X Press the 0081or0082 button to select the
Clock/Date
Clock/Date submenu.
X Press the 0063button to select the
12/24 h 12/24 h function.
The selection marker is on the current set-
ting.
X Press the 0081or0082 button to select the
12 h
12 h or24 h
24 h clock format.
Lighting submenu Activating/deactivating Highbeam Assist
Using the steering wheel buttons
X Press the 0080or007F button repeatedly
until the Settings
Settings menu appears in the
display.
X Press the 0063button to switch to the sub-
menu selection.
X Press the 0081or0082 button to select the
Lighting
Lighting submenu.
X Press the 0063button to select the High‐ High‐
beam Assist
beam Assist function.
The selection marker is on the current set-
ting.
X Use the 0081or0082 button to switch
Highbeam Assist On
On orOff
Off .
i For safety reasons, it is not possible to
reset the Highbeam
Highbeam Assist
Assistfunction to the
factory settings during a journey. You will
see the following message in the display: Setting only possible at stand‐ Setting only possible at stand‐
still still.
For further information about Highbeam
Assist, see (Y page 97).
Switching the daytime running lamps on/
off If you switch the daytime running lamps func-
tion to
On On, the daytime running lamps will
automatically light up when the engine is run-
ning.
For safety reasons, it is only possible to
change this setting when the vehicle is sta-
tionary. The factory setting is On Onin countries
in which daytime running lamp mode or day-
time running lamps are mandatory.
Using the steering wheel buttons
X Press the 0080or007F button repeatedly
until the Settings Settings menu appears in the
display.
X Press the 0063button to switch to the sub-
menu selection.
X Press the 0081or0082 button to select the
Lighting
Lighting submenu.
X Press the 0063button to select the Day‐
Day‐
time runn. lamps
time runn. lamps function.
The selection marker is on the current set-
ting.
X Press the 0081or0082 button to switch
the daytime running lamps On OnorOff
Off.
i If you turn the light switch to 0060or
0058, the corresponding lamp switches on.
If you turn the light switch to 0058, the
daytime running lamps remain switched
on.
i For safety reasons, it is not possible to
reset the Daytime runn. lamps Daytime runn. lamps function
to the factory setting while the vehicle is in 194
On-board computer (vehicles with steering wheel buttons)On-board computer and displays 

Vehicle submenu
Setting the radio station selection
With the
Search
Searchfunction, you can set how
the radio changes the station when you oper-
ate it with the steering wheel buttons (not
with Audio 20).
The Frequency
Frequency setting starts the station
search. The Memory
Memorysetting selects the next
stored station.
Using the steering wheel buttons
X Press the 0080or007F button repeatedly
until the Settings Settings menu appears in the
display.
X Press the 0063button to switch to the sub-
menu selection.
X Press 0081or0082 to select the Vehicle
Vehicle
submenu.
X Press the 0063button to select the
Search
Search function.
The selection marker is on the current set-
ting.
X Press the 0081or0082 button to select the
station search mode.
Setting the windshield wiper sensitivity You can use the
Wipe
Wipesensor
sensor function to set
the sensitivity of the rain/ light sensor. Using the steering wheel buttons
X
Press the 0080or007F button repeatedly
until the Settings Settings menu appears in the
display.
X Press the 0063button to switch to the sub-
menu selection.
X Press 0081or0082 to select the Vehicle
Vehicle
submenu.
X Press the 0063button to select the Wipe
Wipe
sensor
sensor function.
The selection marker is on the current set-
ting.
X Press the 0081or0082 button to adjust the
sensitivity of the rain/light sensor.
The levels are graded as follows:
R Level 1 Level 1: high sensitivity – wiping begins
even in light rain
R Level 2 Level 2: moderate sensitivity
R Level 3
Level 3: low sensitivity – wiping only
begins in heavy rain
Convenience submenu The
Key Key function allows you to define whether
settings for some submenus are stored with
a key dependence.
This function pertains to the Inst. clus‐ Inst. clus‐
ter
ter (instrument cluster) menu, the Light‐
Light‐
ing
ing menu and the Vehicle
Vehiclemenu.
Using the steering wheel buttons
X Press the 0080or007F button repeatedly
until the Settings Settings menu appears in the
display.
X Press the 0063button to switch to the sub-
menu selection.
X Press the 0081or0082 button to select the
Convenience
Convenience submenu.196
On-board computer (vehicles with steering wheel buttons)On-board computer and displays