
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

motion. You will see the following message
in the display: Setting only possible
Setting only possible
at standstill
at standstill.
Switching surround lighting on or off 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 Loc. Loc.
lighting
lighting function.
The selection marker is on the current set-
ting.
X Use the 0081or0082 button to switch the
surround lighting On OnorOff
Off .
If you switch the surround lighting to On
On, the
following lamps light up in the dark after you
have unlocked the vehicle using the key:
R the parking lamps
R the tail lamps
R the license plate lamps
R the fog lamps
The surround lighting automatically switches
off after 40 seconds or if you:
R open the driver's door
R insert the key into the ignition lock
R lock the vehicle using the key Setting the exterior lighting delayed
switch-off In the
Headlamps Headlamps submenu, you can set
whether and for how long you wish the exte-
rior lighting to remain on after closing the
doors.
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 Head‐
Head‐
lamps
lamps function.
The selection marker is on the current set-
ting.
X Press the 0081or0082 button to select
whether and for how long you wish the
exterior lighting to remain on.
If you have set the delayed switch-off and
switch off the engine, the following remain lit:
R the parking lamps
R the tail lamps
R the license plate lamps
R the fog lamps
i You can reactivate this function by open-
ing a door within 10 minutes.
If, after switching off the engine, you do not
open a door or you close an open door, the
exterior lighting switches off after
60 seconds. On-board computer (vehicles with steering wheel buttons)
195On-board computer and displays Z

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

Display messages Possible causes/consequences and
0050
0050Solutions flashes for 5 seconds, the
00B0indicator lamp also flashes and
then lights up constantly.
Lane Keeping Assist is deactivated and temporarily inoperative.
Possible causes are:
R There are no lane markings present.
R The camera's functionality is impaired due to heavy rain, snow
or fog.
R The camera cannot recognize the road markings:
- It is too dark.
- The lane markings are worn or are covered, for example, by
dirt or snow.
R The windshield is dirty in the camera's field of vision.
X Stop the vehicle paying attention to road and traffic conditions.
X Secure the vehicle to prevent it from rolling away
(Y page 151).
X Clean the windshield (Y page 269), particularly in the camera's
field of vision.
If the 00B0 indicator lamp goes out, Lane Keeping Assist is
operational again.
If the problem persists, visit a qualified specialist workshop. 0099
dEF Chk dEF Chk In addition, the yellow
00B9Check Engine indicator lamp and the
yellow 00E2DEF indicator lamp light up and a warning tone
sounds.
The DEF reducing agent is contaminated, diluted or is not compli-
ant with ISO 22241.
After the first message and under normal operating conditions,
you can drive on for up to approximately 50 miles (80 km). Then
a warning tone sequence sounds and the engine can only be
started another 16 times.
X Have the DEF tank cleaned and refilled at a qualified specialist
workshop as soon as possible. 202
Display
messagesOn-board computer and displays

Display messages Possible causes/consequences and
0050
0050Solutions 0099
dEF Chk dEF Chk In addition, the yellow
00E2DEF indicator lamp lights up and a
warning tone sounds.
The DEF supply has dropped below 1.5 US gal (5.5 l).
After the message appears for the first time, and under normal
driving conditions, the remaining DEF supply will last for approx-
imately 1000 miles (1600 km).
After that, the 0.8 US gal (3.0 l) reserve mark is reached. A warning
tone sequence sounds and the engine can then only be started
another 16 times.
X add DEF supply (Y page 149).
The 00E2 DEF indicator lamp disappears after no more than
20 seconds after the vehicle has stopped or you have switched
on the ignition or started the engine after refueling. 0099
StArtS RExx StArtS RExx In addition, the yellow
00B9Check Engine indicator lamp and the
yellow 00E2DEF indicator lamp light up and a warning tone
sounds. A warning tone sequence sounds.
After the message appears for the first time, the engine can only
be started another 16 times.
The number of remaining engine starts XX XX(1616 to0
0) is shown in the
message every time the engine is started. When the number of
remaining engine starts is 0 0the engine management prevents the
vehicle being driven at a speed exceeding 5 mph (8 km/h). The
Idle Mode Idle Mode message appears in the multifunction display: The DEF reducing agent is contaminated, diluted or is not compli-
ant with ISO 22241.
X
Have the DEF tank cleaned and refilled at a qualified specialist
workshop as soon as possible. The exhaust gas aftertreatment is malfunctioning or an emission
relevant malfunction has occurred. This malfunction or defect can
damage the exhaust gas aftertreatment.
X
Visit a qualified specialist workshop immediately. Display
messages
203On-board computer and displays Z

Display messages Possible causes/consequences and
0050
0050Solutions 0099
StArtS IdLE StArtS IdLE In addition, the yellow
00E2DEF indicator lamp lights up and a
warning tone sequence sounds.
The DEF supply has dropped below the 0.8 US gal (3.0 l) reserve
mark.
After the message appears for the first time, the remaining DEF
supply will last for approximately 1000 miles (1600 km). The
engine can then only be started another 16 times.
The number of remaining engine starts XX
XX (1616 to0 0) is shown in the
message every time the engine is started. If the number displayed
is 0 0, the yellow 00B9Check Engine indicator lamp also lights up
and you can only drive the vehicle at a maximum 5 mph
(8 km/h).
X Add at least 2.0 US gal (7.6 l) of DEF (Y page 149).
The 00E2 DEF indicator lamp disappears after no more than
20 seconds after the vehicle has stopped or you have switched
on the ignition or started the engine after refueling. Err Err flashes for 5 seconds, the
00CEindicator lamp also flashes and
then goes out.
Highbeam Assist is deactivated and temporarily not operational
or Highbeam Assist is malfunctioning.
Possible causes are:
R The camera's functionality is impaired due to heavy rain, snow
or fog.
R The windshield is dirty in the camera's field of vision.
X Stop the vehicle paying attention to road and traffic conditions.
X Secure the vehicle to prevent it from rolling away
(Y page 151).
X Clean the windshield (Y page 269), particularly in the camera's
field of vision.
If the 00CE indicator lamp goes out, Highbeam Assist is opera-
tional again.
If the problem persists, visit a qualified specialist workshop. 204
Display
messagesOn-board computer and displays

Display messages Possible causes/consequences and
0050
0050Solutions Blind_Err
Blind_Err flashes for 5 seconds, the yellow indicator lamps flash in the exte-
rior mirrors and then lights up constantly.
Blind Spot Assist is faulty.
X
Visit a qualified specialist workshop. Err Err flashes for 5 seconds, the
00C7indicator lamp also flashes and
then lights up constantly.
Collision Prevention Assist is malfunctioning.
X Visit a qualified specialist workshop. Display
messages
205On-board computer and displays Z