
ings are suppressed for a certain period of
time.
R you accelerate hard, e.g. kickdown.
R you brake hard.
R you steer actively, e.g. swerve to avoid an
obstacle or change lane quickly.
R you cut the corner on a sharp bend.
In order that you are warned only when nec-
essary and in good time if you cross the lane
marking, the system recognizes certain con-
ditions and warns you accordingly.
Lane Keeping Assist warns you earlier if:
R you approach the outer lane marking on a
bend.
R the road has very wide lanes, e.g. a high-
way.
R the system recognizes solid lane markings.
Warnings are given later if:
R the road has narrow lanes.
R you cut the corner on a bend. PARKTRONIC
Important safety notes PARKTRONIC is only an aid. It cannot replace
your own awareness of the immediate sur-
roundings. You are responsible for safe
maneuvering, parking and pulling away. When
maneuvering, parking and pulling away, make
sure that there are no persons, animals or
objects in the maneuvering area.
PARKTRONIC does not account for obstacles
that are:
R beneath its detection range, e.g. persons,
animals or objects
R above its detection range, e.g. overhanging
loads, overhangs or truck loading ramps
PARKTRONIC is an electronic parking aid with
ultrasonic sensors. It indicates the distance
between your vehicle and an object visually
and audibly.
Your vehicle features two separate sound
emitters with different frequencies for the warning tones. The warning ranges in front of
and behind the vehicle are indicated by dif-
ferent warning tones.
PARKTRONIC is activated automatically when
you:
R turn the key to position 2in the ignition lock
R release the parking brake and
R move the selector lever to D,Nor R.
PARKTRONIC is deactivated at speeds above
11 mph (18 km/h). PARKTRONIC is reacti-
vated at speeds below 10 mph (16 km/h).
PARKTRONIC monitors the area around your
vehicle with sensors in the front and rear
bumpers.
Range of the sensors !
Pay particular attention to obstacles
above or below the sensors when parking,
such as flower pots or trailer towbars.
PARKTRONIC does not recognize such
objects when they are in the immediate
vicinity of the vehicle. You could damage
the vehicle or objects.
PARKTRONIC can suffer interference from:
R ultrasonic sources such as a truck's
compressed-air brakes, an automatic car
wash or a pneumatic drill
R attachments to the vehicle, e.g. rear
mounted racks
R number plates (vehicle license plates)
that are not affixed flat against the
bumper
R dirty or icy sensors 168
Driving systemsDriving and parking

Problems with PARKTRONIC
Problem Possible causes/consequences and
0050
0050Solutions Only the red segments
in the PARKTRONIC
warning displays are lit.
A warning tone also
sounds for approx-
imately 2 seconds.
PARKTRONIC is deacti-
vated after approx-
imately 20 seconds.
The indicator lamp of
the
0069 button lights
up and the red seg-
ments in the
PARKTRONIC warning
display go out. PARKTRONIC has malfunctioned and has switched itself off.
X
If problems persist, have PARKTRONIC checked at a qualified
specialist workshop. The PARKTRONIC
warning displays
implausible distances.
For example, all the
segments may be lit
even though there is no
obstacle present. The PARKTRONIC sensors are dirty or iced up.
X
Clean the PARKTRONIC sensors (Y page 270).
X Turn the key to position 2again in the ignition lock. The license plate or other parts attached near the sensors may
not be secured correctly.
X
Check the license plate and attachment parts near the sensors
for correct seating. An external radio or ultrasonic source may be causing interfer-
ence.
X
Check PARKTRONIC functions in a different location. Rear view camera
Important safety notes !
Objects that are not at ground level
appear further away than they actually are,
for example:
R the bumper of the vehicle parked behind
R the drawbar of a trailer
R the ball coupling of a trailer tow hitch
R the tail-end of a truck
R slanted posts Only use the camera guide lines for orien-
tation. Do not get any closer to objects than
the lowest horizontal guide line. You may
otherwise damage your vehicle and/or the
object.
The rear view camera is only an aid. It cannot
replace your own awareness of the immedi-
ate surroundings. You are responsible for
safe maneuvering and parking. When maneu-
vering and parking, make sure that there are
no persons, animals or objects in the maneu-
vering area. Driving systems
171Driving and parking Z

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 variations
are possible. Note that your vehicle may not
be equipped with all of the described func-
tions. This also applies to systems and func-
tions relevant to safety.
Read the information on qualified specialist
workshops (Y page 26). Important safety notes
G
WARNING
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
a risk of an accident and injury.
Only operate the adjustment knobs when the
vehicle is stationary. Do not reach through the
steering wheel when driving. G
WARNING
If you operate information systems and 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 a risk of an accident.
Only operate the equipment when the traffic
situation permits. If you are not sure that this
is possible, park the vehicle paying attention
to traffic conditions and operate the equip-
ment when the vehicle is stationary. G
WARNING
If the instrument cluster has failed or mal-
functioned, you may not recognize function
restrictions in systems relevant to safety. The
operating safety of your vehicle may be
impaired. There is a risk of an accident.
Drive on carefully. Have the vehicle checked
at a qualified specialist workshop immedi-
ately. If uncertainties regarding the operating safety
of the vehicle arise when continuing the jour-
ney, stop the vehicle, paying attention to road
and traffic conditions. Instrument cluster
Overview
0043
Instrument cluster on vehicles without
steering wheel buttons
0044 Instrument cluster in vehicles with steer-
ing-wheel buttons
0087 0074/0075 adjustment button, 0079menu but-
ton, 0045reset button, 0098service button
(engine oil level check)
You will find a full overview of the instrument
cluster in the "At a glance" section
(Y page 34).
The display in the instrument cluster is acti-
vated when you:
R open the driver's door
R turn the key to position 2in the ignition lock
R press the 0045reset button
R switch on the lights
The display switches off automatically after
approximately 30 seconds if:
R the vehicle lighting is not switched on.
R the key is in position 0in the ignition lock. 182
Instrument clusterOn-board computer and displays

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

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

X
Press the 0063button to select the Key
Key
function.
The selection marker is on the current set-
ting.
X Press the 0081or0082 button to activate
or deactivate key dependency. Trip computer menu
General notes You can call up or reset statistical data for the
vehicle in the Trip computer menu.
i When you call up the trip computer again,
it displays the last function called up.
The units of the statistical information dis-
played are set permanently for each spe-
cific country, and are therefore independ-
ent of the units selected in the Settings
Settings
menu.
Trip computer "After start" or "After
reset" Example: "After start" trip computer
0043
Distance
0044 Time
0087 Average speed
0085 Average fuel consumption
Using the steering wheel buttons
X Press the 0080or007F button to select
After start
After start.
Or
X Press the 0041or0068 button to select
After reset After reset.
The values in the After start
After startsubmenu
refer to the start of the journey. The values in the
After reset
After reset submenu are calculated
from the last time the trip computer was
reset.
The After start After start trip computer function is
automatically reset if:
R the ignition has been switched off for more
than four hours.
R 999 hours have been exceeded.
R 9,999 miles have been exceeded.
The After reset
After reset trip computer is automati-
cally reset if the value exceeds 9,999 hours
or 99,999 miles.
i If you turn the key to position 0in the
ignition lock or remove it, all the values are
reset after approximately four hours.
The values will not be reset if you turn the
key back to position 1or 2during this time.
Calling up the range Using the steering wheel buttons
X
Press the 0080or007F button to select
After start After start.
X Select Range
Rangeusing the 0041or0068 but-
ton.
The approximate distance which can be
covered with the tank's current contents
and your current style of driving is shown.
i If there is only a small amount of fuel left
in the fuel tank, the 00B5Please refuelPlease refuel
message is shown instead of the range.
Resetting the trip computer Using the steering wheel buttons
X
Press the 0080or007F button to select
After start After start.
X Press the 0041or0068 button to select the
function you would like to reset.
X Press and hold the 0045reset button until the
values are reset to "0". On-board computer (vehicles with steering wheel buttons)
197On-board computer and displays Z