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Either no braking application, or a course-
correcting brake application adapted to the
driving situation occurs if: R
there are vehicles or obstacles, e.g. crash
barriers, close to both sides of your vehicle. R
a vehicle approaches you too closely at the
side. R
you have adopted a sporty driving style with
high cornering speeds. R
you brake or accelerate significantly. R
a driving safety system intervenes, e.g.
ESP ®
or PRE-SAFE ®
Brake.R
ESP ®
is switched off.R
the off-road program is activated (vehicles
without the ON&OFFROAD package). R
off-road program 1 or 2 is activated (vehi-
cles with the ON&OFFROAD package). R
the LOW RANGE off-road gear is activated
(vehicles with the ON&OFFROAD package). R
a loss of tire pressure or a defective tire is
detected.
Switching on Active Blind Spot Assist X
Make sure that Active Blind Spot Assist is
activated in the on-board computer
( Y
page 282). X
Turn the SmartKey to position 2 in the igni-
tion lock.
Warning lamps C in the exterior mirrors
light up red for approximately 1.5 seconds
and then turn yellow.
Towing a trailer
When you attach a trailer, make sure you have
co rr ectly established the electrical connec-
tion. This can be accomplished by checking
the trailer lighting. Active Blind Spot Assist is
then deactivated. The indicator lamp lights up
yellow in the exterior mirrors and the Active
Blind Spot Assist Currently Unavail‐
able See Operator's Manual message
appears in the multifunction display. Active Lane Keeping Assist General notes
Active Lane Keeping Assist monitors the area
in front of your vehicle by means of camera C
at the top of the windshield. Active Lane
Keeping Assist detects lane markings on the
road and warns you before you leave your
lane unintentionally. If you do not react to the
warning, a lane-correcting application of the
brakes can bring the vehicle back into the
original lane.
This function is available in a speed range
between 40 mph and 120 mph (60 km/h and
200 km/h).
For Active Lane Keeping Assist to assist you
when driving, the radar sensor system must
be operational
Important safety notes
If you fail to adapt your driving style, Active
Lane Keeping Assist can neither reduce the
risk of accident nor override the laws of phys-
ics. Active Lane Keeping Assist cannot take
into account road, weather or traffic condi-
tions. Active Lane Keeping Assist is only an
aid. You are responsible for the distance to
the vehicle in front, for vehicle speed, for
braking in good time and for staying in your
lane.
Active Lane Keeping Assist cannot continu-
ously keep your vehicle in its lane.
G WARNING
Active Lane Keeping Assist cannot always
clearly detect lane markings.Driving system s 251
Dr ivi ng an d parking Z

If you leave your lane, under certain circum-
stances the vehicle will brake briefly on one
side. This is meant to assist you in bringing
the vehicle back to the original lane.
If a lane-correcting brake application occurs,
display C appears in the multifunction dis-
play.
A lane-correcting brake application can only
be made after driving over a solid, recogniz-
able lane marking. Before this, a warning
must be given by means of intermittent vibra-
tion in the steering wheel. In addition, a lane
with lane markings on both sides must be
recognized. The brake application also
slightly reduces vehicle speed.
i A further lane-correcting brake applica-
tion can only occur after your vehicle has
returned to the original lane.
No lane-correcting brake application occurs
if: R
you clearly and actively steer, brake or
accelerate. R
you cut the corner on a sharp bend. R
you have switched on the turn signal. R
a driving safety system intervenes, e.g.
ESP ®
, PRE-SAFE ®
Brake or Active Blind
Spot Assist. R
you have adopted a sporty driving style with
high cornering speeds or high rates of
acceleration. R
ESP ®
is switched off.R
the transmission is not in position D . R
on vehicles with a trailer tow hitch, the
electrical connection to the trailer has been
correctly established. R
the off-road program is activated (vehicles
without the ON&OFFROAD package). R
off-road program 1 or 2 is activated (vehi-
cles with the ON&OFFROAD package). R
the LOW RANGE off-road gear is activated
(vehicles with the ON&OFFROAD package). R
when a loss of tire pressure or a defective
tire has been detected and displayed.
There is a possibility that the Active Lane
Keeping Assist could misjudge the given traf-
fic situation. An inappropriate brake applica-
tion may be interrupted at any time if you: R
steer slightly in the opposite direction R
switch on the turn signal R
clearly brake or accelerate
A lane-correcting brake application is inter-
rupted automatically if: R
a driving safety system intervenes, e.g.
ESP ®
, PRE-SAFE ®
Brake or Active Blind
Spot Assist. R
lane markings can no longer be recognized.
Switching on Active Lane Keeping Assist X
Switch on Active Lane Keeping Assist using
the on-board computer; to do so, select
Standard
or Adaptive ( Y
page 282).
If you drive at speeds above 40 mph
(60 km/h) and lane markings are detected,
the lines in the assistance graphics display
( Y
page 281) are shown in green. Active
Lane Keeping Assist is ready for use.
If Standard is selected, no warning vibra-
tion occurs if: R
you switch on the turn signals. In this
event, the warnings are suppressed for a
certain period of time. R
a driving safety system intervenes, such
as ABS, BAS or ESP ®
.
When Adaptive is selected, no warning
vibration occurs if: Driving systems 253
Driving and parking Z

R
you switch on th e tur n signals. In this
event , th e warnings are suppressed fo r a
certain period of time. R
a drivin g safet y system intervenes, e.g.
ABS, BA S or ES P ®
.R
you accelerat e hard, e.g. kickdown .R
you brak e hard.R
you steer actively, e.g. swerve to avoid an
obstacle or chang e lanes quickly.R
you cut th e corner on a shar p bend.
Towing a trailer
Whe n you attach a trailer , mak e sur e you hav e
correctl y established th e electrica l connec -
tion . This can be accomplished by checking
th e trailer lighting . Lane-correcting brak e
application doe s no t take plac e when towin g
a trailer . Active Lan e Keepin g Assis t is no t
activated and th e lines in th e assistanc e
graphi c are gray.
On-road program s (vehicles wit h th e
ON&OFFROAD package)
General notes
The on-road programs assist you during on -
road drivin g and th e off-road programs when
drivin g off-road ( Y
page 258).
The following program message s remain in
th e multifunction display until th e corre-
spondin g vehicl e level has been set . Up to off-
road level 2, you can hide th e program mes -
sage s usin g th e 8 or v butto n on th e
multifunction steerin g wheel. AUT O program
Selec t th e AUTO program fo r a mor e com-
fortable rid e under all normal drivin g condi-
tions.
Your selection remain s stored eve n if you
remov e th e SmartKey from th e ignition lock.X
Selecto r wheel C engaged : briefl y press
selector whee l C .
Selecto r whee l C extends. X
To select : tur n selector whee l C until indi-
cator lamp D comes on .
AUTO indicator

Off-road level 1 is set to +1.2 in (+30 mm)
above the vehicle's "highway" level.
Off-road program 1 switches to the AUTO
program if you drive faster than 70 mph
(110 km/h).
Select off-road program 1 for gentle off-road
terrain, e.g. for gravel or sand surfaces or
tracks. The engine's torque is restricted to a
limited degree and the drive wheels can spin.
The spinning wheels produce a cutting effect
for better traction.
You can only activate off-road program 1
when driving at speeds of 60 mph (100 km/h)
or below. The Drive Program OFFROAD 1
Max. 60 mph ( 100 km/h) message appears
in the multifunction display.
Off-road program 2
X
Selector wheel C engaged: briefly press
selector wheel C .
Selector wheel C extends.X
To select: turn selector wheel C until indi-
cator lamp D comes on.
Off-road indicator

vehicle rolling away unintentionally. There is a
risk of an accident.
Wait until the transfer case shift process is
completed.
Do not turn off the engine while changing gear
and do not shift the automatic transmission
to another position.
General notes
C
LOW RANGE off-road gear buttonD
LOW RANGE off-road gear indicator lamp
HIGH RANGE
Position for all normal on-
road driving conditions
LOW RANGE
Off-road position for driv-
ing off-road and fording
The transmission ratio
between the engine and
wheels is only approx-
imately one third of that in
the HIGH RANGE road
position. Drive torque is
thus proportionately
higher.
Do not use LOW RANGE: R
on slippery road surfa-
ces, e.g. in the case of
slush R
on snow or ice-covered
roads R
if you have mounted
snow chains to your
vehicle The LOW RANGE off-road gear assists you in
driving off-road and when fording. When LOW
RANGE is engaged, the engine’s performance
characteristics and the gearshifting charac-
teristics of the automatic transmission are
adapted for this purpose.
Further information about "Driving off-road"
( Y
page 198). You will find information about
driving safety systems in conjunction with
LOW RANGE in the "Safety" section
( Y
page 68).
From HIGH RANGE to LOW RANGE
! Only change from LOW RANGE to HIGH
RANGE if: R
the engine is running. R
the transmission is in position NR
you are driving at a speed below
40 km/h X
Press LOW RANGE button C .
Indicator lamp D flashes.
When the gear change is complete, indica-
tor lamp D lights up. LOW RANGE indica-
tor appears in the multifunction display and
in the status indicator.
While indicator lamp D is flashing, you can
cancel the gear change by pressing LOW
RANGE button C again.
i You cannot activate LOW RANGE if the
SPORT drive program is activated. The
LOW RANGE Not in Drive Program
"Sport" message then appears in the mul-
tifunction display.
From LOW RANGE to HIGH RANGE
! Only change from LOW RANGE to HIGH
RANGE if: R
the engine is running. R
the transmission is in position NR
you are driving at a speed below
70 km/h260
Driving systems
Driving and parking

X
Press LOW RANGE button C .
Indicator lamp D flashes.
When the gear change is complete, indica-
tor lamp D goes out. In the multifunction
display, the LOW RANGE Off message
appears and status indicator

Messages in the multifunction display
If a gear change process has not been successful, the following messages may be displayed in
the multifunction display:
Display messages
Possible causes/consequences and P Solutions
LOW RANGE Max.
Speed 40 km/h You have been driving faster than 40 km/h. Additionally, the indi-
cator lamp on the button in the center console blinks. X
Drive more slowly to carry out the gear change process.
LOW RANGE Shift to
Position N Briefly The transmission is in position D and you are driving at below
40 km/h. X
Shift the transmission to N to complete the gear change proc-
ess.
LOW RANGE Shifting
Canceled Please
Reactivate The gear change process was not carried out. X
Ensure that all gear change conditions are fulfilled and carry out
the gear change process again.
LOW RANGE Stop
Apply Parking Brake A warning tone also sounds. The gear change process has not been
completed. LOW RANGE is in the neutral position. There is no
connection between the engine and the drive wheels.
! Do not drive any further. You could otherwise damage the
vehicle's drive train. X
Stop the vehicle. Take into account the road and traffic condi-
tions when doing this. X
Depress the electric parking brake ( Y
page 190).X
Carry out the gear change process again.
If the gear change process has been carried out, the LOW
RANGE
Stop Apply Parking Brake message disappears.
ON&OFFROAD menu in the COMAND
display (vehicles with the ON&OFF-
ROAD package) You can display some driving systems, driving
programs and additional information in the
COMAND display. X
Make sure that the SmartKey is in position
2 in the ignition lock. X
Make sure that COMAND is activated, see
the separate COMAND operating instruc-
tions. X
Press function button C .
The corresponding displays appear in the
COMAND display: R
Level control R
Steering angle R
Vehicle's angle of inclination262
Driving systems
Driving and parking

Useful information ............................ 272
Important safety notes ..................... 272
Displays and operation ..................... 272
Menus and submenus ...................... 275
Display messages ............................. 290
Warning and indicator lamps in the
instrument cluster ............................ 324 271
On-board computer and displays

Useful information
i This Operator's Manual describes all
models and all standard and optional equip-
ment of your vehicle available at the time of
publication of the Operator's Manual.
Country-specific differences are possible.
Please note that your vehicle may not be
equipped with all features described. This
also applies to safety-related systems and
functions.
i Read the information on qualified special-
ist workshops ( Y
page 29).
Important safety notes
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.
You must observe the legal requirements for
the country in which you are currently driving
when operating the on-board computer.
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 the operating safety of your vehicle is
impaired, pull over as soon as it is safe to do
so. Contact a qualified specialist workshop. The on-board computer only shows messages
or warnings from certain systems in the mul-
tifunction display. You should therefore make
sure your vehicle is operating safely at all
times.
For an overview, see the instrument panel
illustration ( Y
page 35).
Displays and operation
Instrument cluster lighting The lighting in the instrument cluster, in the
displays and the controls in the vehicle inte-
rior can be adjusted using the brightness con-
trol knob.
The brightness control knob is located on the
bottom left of the instrument cluster
( Y
page 35). X
Turn the brightness control knob clockwise
or counter-clockwise.
If you turn the light switch to X , ` or
X , the brightness is dependent upon
the brightness of the ambient light.
i The light sensor in the instrument cluster
automatically controls the brightness of
the multifunction display.
In daylight, the displays in the instrument
cluster are not illuminated.
Speedometer with segments
The speedometer is divided into segments
only on vehicles with DISTRONIC PLUS.
The segments in the speedometer indicate
which speed range is available. R
DISTRONIC PLUS activated ( Y
page 205):
One or two segments in the set speed
range light up. R
DISTRONIC PLUS detects a vehicle in front
that is driving at a slower speed than the
stored speed:
The segments between the speed of the
vehicle in front and the stored speed light
up.272
Displays and operation
On-board computer and displays

Tachometer
! Do not drive in the overrevving range, as
this could damage the engine.
The red band in the tachometer indicates the
engine's overrevving range.
The fuel supply is interrupted to protect the
engine when the red band is reached.
Outside temperature display You should pay special attention to road con-
ditions when temperatures are around freez-
ing point.
Bear in mind that the outside temperature
display indicates the temperature measured
and does not record the road temperature.
The outside temperature display is in the mul-
tifunction display ( Y
page 275).
Changes in the outside temperature are dis-
played after a short delay.
Coolant temperature display
G WARNING
Opening the hood when the engine is over-
heated or when there is a fire in the engine
compartment could expose you to hot gases
or other service products. There is a risk of
injury.
Let an overheated engine cool down before
opening the hood. If there is a fire in the
engine compartment, keep the hood closed
and contact the fire department.
! A display message is shown if the coolant
temperature is too high.
If the coolant temperature is over 248 ‡
(120 †), do not continue driving. The
engine will otherwise be damaged.
The coolant temperature gauge is in the
instrument cluster on the right-hand side
( Y
page 35). Under normal operating conditions and with
the specified coolant level, the coolant tem-
perature may rise to 248 ‡ (120 †).
Operating the on-board computer
Overview
C
Multifunction display D
Switches on the Voice Control System
(see the separate operating instructions)