
If Active Blind Spot Assist detects a risk of a
lateral collision in the monitoring range, a
course-correcting 
brake application is carried
out. This is meant to assist you in avoiding a
collision.
If a course-correcting brake application
occurs, red warning lamp  : flashes in the
exterior mirror and a dual warning tone
sounds. The display shown in the illustration
also appears in the multifunction display.
The course-correcting brake application is
available in the speed range between
20 mph(30 km/h) and120 mph(200 km/h).
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, located on 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 clearly brake or accelerate.
R a driving safety system intervenes, e.g.
ESP ®
 or PRE-SAFE ®
 Brake. R
ESP ®
 is switched off.
R a loss of tire pressure or a defective tire is
detected.
Switching on Active Blind Spot Assist
X Make sure that the radar sensor system
(Y page 226) and Active Blind Spot Assist
(Y page 
223) are activated in the on-board
computer.
X Turn the SmartKey to position  2 in the
ignition lock.
Warning lamps  : in the exterior mirrors
light up red for approximately
1.5 seconds
 and then turn yellow.
Active Lane Keeping Assist Important safety notes
G
WARNING
Active Lane Keeping Assist does not keep
your vehicle in its lane. It is only an aid and
may detect the lane markings on the road
incorrectly or not at all.
The system may be impaired or may not
function if:
R there is poor visibility, e.g. due to
inadequate 
illumination of the road surface,
snow, rain, fog or spray.
R there is glare, e.g. from oncoming traffic,
the sun, or reflection from other vehicles.
R the windshield is dirty, fogged up or
covered, for instance by a sticker, in the
vicinity of the camera.
R several or no lane markings for a single lane
are present.
R the lane markings are worn away, dark or
covered up, e.g. by dirt or snow.
R the distance to the vehicle in front is too
small, and as a result the lane markings
cannot be recognized.
R the lane markings on the road are unclear,
e.g. near roadworks. Driving systems
207
Driving and parking
Z     

R
the lane markings change quickly, e.g.
branch off, cross or merge.
R the road is narrow and winding.
Active Lane Keeping Assist cannot detect
road and traffic conditions. It is not a
substitute for attentive driving. You are
responsible 
for the vehicle's speed, braking in
good time and steering correctly. Always
adapt your driving style to suit the prevailing
road and weather conditions. Always pay
attention to traffic conditions and your
surroundings. Otherwise, you may fail to
recognize dangers in time, cause an accident
and injure yourself and others.
General notes Active Lane Keeping Assist monitors the area
in front of your vehicle by means of a
camera 
: 
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.
In the  Display Unit Speed-/Odometer:
on-board computer function (Y page 224), if
you select the  km display unit, Active Lane-
Keeping Assist is activated at a speed of
60 km/h. If the  Miles display unit is selected,
the assistance range begins at 40 mph.
Warning vibration in the steering wheel
A warning may be given if a front wheel
passes over a lane marking. It will warn you by means of intermittent vibration in the
steering wheel for up to 1.5 seconds.
In order that you are warned only when
necessary and in good time if you cross the
lane marking, the system recognizes certain
conditions and warns you accordingly.
The warning vibration occurs earlier if:
R
you approach the outer lane marking on a
bend.
R the road has very wide lanes, e.g. a
freeway.
R the 
system recognizes solid lane markings.
The warning vibration occurs later if:
R the road has narrow lanes.
R you cut the corner on a bend.
Lane-correcting brake application G
WARNING
Active Lane Keeping Assist does not keep
your vehicle in its lane. It is only an aid
designed 
to assist driving. It is not a substitute
for attentive driving. In some cases, the lane-
correcting brake application is not sufficient
to bring your vehicle back to the original lane.
In such cases, you must steer the vehicle
yourself to ensure that it does not leave the
lane.
Active Lane Keeping Assist does not detect
road and traffic conditions. Always make sure
that there is sufficient distance to the side for
other traffic or obstacles. In rare cases,
unclear markings or particular structures on
the roadway can be recognized as solid lane
markings. An inappropriate brake application,
e.g. after intentionally driving over a solid lane
marking, may be interrupted at any time by
steering slightly in the opposite direction.
Active Lane Keeping Assist cannot take
weather conditions into account.
You are responsible for the driving at
appropriate speeds, braking in good time, and
steering correctly. Always adapt your driving
style to suit the prevailing road and weather
conditions. Always pay attention to traffic
conditions and your surroundings. Otherwise, 208
Driving systems
Driving and parking   

you may fail to recognize dangers in time,
cause an accident and injure yourself and
others.
If a lane-correcting brake application occurs,
the display shown in the illustration appears
in the multifunction display.
If you leave your lane under certain
circumstances the vehicle will brake briefly
on one side. This is meant to assist you in
bringing 
the vehicle back to the original lane.
This function is available in the range between
40 mph and 120 mph (60 km/h and
200 km/h).
A lane-correcting brake application can only
be made after driving over a solid,
recognizable lane marking. Before this, a
warning must be given by means of
intermittent vibration 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
application 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 signals.
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 a 
loss of tire pressure or a defective tire has
been detected and displayed.
Active Lane Keeping Assist does not detect
traffic situations or road users. An
inappropriate brake application may be
interrupted at any time if you:
R steer slightly in the opposite direction.
R use a turn signal.
R clearly brake or accelerate.
A lane-correcting brake application is
interrupted 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 223).
Symbol  : appears in the multifunction
display.
If your speed exceeds 
40 mph (60 km/h)
and lane markings are detected,
symbol  : is highlighted. Active Lane
Keeping Assist is ready for use.
If Standard is selected, no warning
vibration occurs if:
R you have switched 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 ®
.
If Adaptive is selected, no warning
vibration occurs if: Driving systems
209
Driving and parking Z     

R
you  have switched on the turn signals. In
this event, the warnings are suppressed
for a certain period of time.
R a driving safety system intervenes, e.g.
ABS, BAS or ESP ®
.
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.210
Driving systems
Driving and parking 

Useful information
i This Operator's Manual describes all
models and all standard and optional
equipment 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
specialist workshops: ( Y page 24).Important safety notes
G
WARNING
The driver's concentration must always be
directed primarily at road traffic.
For your safety and the safety of others,
selecting features through the multifunction
steering wheel should only be done by the
driver 
when traffic and road conditions permit
it to be done safely.
Bear in mind that at a speed of only 30 mph
(approximately 50 km/h), the vehicle covers
a distance of 44 feet (approximately 14 m) per
second. G
WARNING
No messages will be displayed if either the
instrument cluster or the multifunction
display is inoperative.
As a result, you will not be able to see
information about your driving conditions,
such as
R speed
R outside temperature
R warning/indicator lamps
R malfunction/warning messages
R failure of any systems
Driving characteristics may be impaired. If you must continue to drive, do so with added
caution. Contact an authorized Mercedes-
Benz Center as soon as possible.
G
WARNING
Malfunction and warning messages are only
displayed for certain systems and are
intentionally not very detailed. The
malfunction and warning messages are
simply a reminder with respect to the
operation of certain systems. They do not
replace the owner's and/or driver's
responsibility to maintain the vehicle's
operating safety. Have all required
maintenance services and safety checks
performed 
on the vehicle. Bring the vehicle to
an authorized Mercedes-Benz Center to
address the malfunction and warning
messages. G
WARNING
All categories of messages contain important
information which should be taken note of
and, where a malfunction is indicated,
addressed as soon as possible at an
authorized Mercedes-Benz Center.
Failure to repair the condition noted may
cause 
damage not covered by the Mercedes-
Benz Limited Warranty, or result in property
damage or personal injury.
For an illustration of the instrument cluster,
see ( Y page 29).212
Important safety notes
On-board computer and displays 

Steam from an overheated engine can cause
serious 
burns which can occur just by opening
the engine hood. Stay away from the engine
if you see or hear steam coming from it.
Stop the vehicle in a safe location away from
other traffic. Turn off the engine, get out of the
vehicle and do not stand near the vehicle until
the engine has cooled down.
!  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 29).
Under normal operating conditions and with
the specified coolant level, the coolant
temperature may rise to 248 ‡ (120 †). 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
G
WARNING
The outside temperature indicator is not
designed to serve as an ice-warning device
and is therefore unsuitable for that purpose.
Indicated temperatures just above the
freezing 
point do not guarantee that the road
surface is free of ice. The road may still be icy,
especially in wooded areas or on bridges.
The outside temperature display is in the
multifunction display ( Y page 215).
Changes in the outside temperature are
displayed after a short delay. Speedometer with segments
The segments in the speedometer indicate
which speed range is available.
R Cruise control activated ( Y page 174):
The segments light up from the stored
speed to the maximum speed.
R DISTRONIC PLUS activated (Y page 177):
One or two segments in the set speed
range light up.
R DISTRONIC 
PLUS detects a vehicle in front:
The segments between the speed of the
vehicle in front and the stored speed light
up. Operating the on-board computer
Overview :
Multifunction display
; Switches on the Voice Control System;
see the separate operating instructions
= Right control panel
? Left control panel
A Back button
X To activate the on-board computer:  
 turn
the SmartKey to position  1 in the ignition
lock. 214
Displays and operation
On-board computer and displays   

Dialing a number from the phone book
X
Press the = or ; button on the
steering wheel to select the Tel menu.
X Press the 9, : or a button to
switch to the phone book.
X Press the  9  or : button to select the
desired name.
or
X To begin rapid scrolling:  press and hold
the 9 or : button for longer than
one second.
Rapid 
scrolling stops when you release the
button or reach the end of the list.
X If only one telephone number is stored 
for 
a name:  press the  6 or a button
to start dialing.
or
X If there is more than one number for a 
particular name:  press the 6 or a
button to display the numbers.
X Press the  9 
 or : button to select the
number you want to dial.
X Press the 6 or a button to start
dialing.
or
X To exit the telephone book:  press the
~ or % button.
Redialing The on-board computer saves the last names
or numbers dialed in the redial memory.
X
Press the = or ; button on the
steering wheel to select the Tel menu.
X Press the 6 button to switch to the
redial memory.
X Press the  9 
 or : button to select the
desired name or number.
X Press the 6 or a button to start
dialing.
or
X To exit the redial memory:  press the
~ or % button. Assistance menu
Introduction In the 
DriveAssist menu, you have the
following options:
R show the distance display 
(Y page 221)
R activate/deactivate ESP ®
(Y page 222)
R activate/deactivate the PRE-SAFE ®
 Brake
(Y page 222)
R activate/deactivate ATTENTION ASSIST
(Y page 222)
R activate/deactivate Blind Spot Assist or
Active Blind Spot Assist (Y page 223)
R activate/deactivate Lane Keeping Assist or
Active Lane Keeping Assist (Y page 223)
Showing the distance display X
Press = or ; on the steering wheel
to select the  DriveAssist menu.
X Press the 9 or : button to select
Distance Display.
X Press the a button.
The DISTRONIC PLUS distance display
appears in the multifunction display
(Y page 185).
If the  Sensors Deactivated message
appears, the radar sensor system is
deactivated.
X Activate the radar sensor system
(Y page 226). Menus and submenus
221
On-board computer and displays Z   

Deactivating/activating ESP
®G
WARNING
If you deactivate ESP ®
, ESP ®
 no longer
stabilizes the vehicle. There is an increased
risk of skidding and an accident.
Only deactivate ESP ®
 in the situations
described in the following.
For further information about ESP ®
, see
(Y page 66).
X Start the engine.
X Press = or ; on the steering wheel
to select the  DriveAssist menu.
X Press 9 or : to select  ESP.
X Press the a button.
The current selection is displayed.
X To activate/deactivate:  press the a
button again.
ESP ®
 is deactivated if the  å warning lamp
in the instrument cluster lights up
continuously when the engine is running.
If the  ä warning lamp and the  å
warning lamp are lit continuously, ESP ®
 is not
available due to a malfunction.
It may be best to deactivate ESP ®
 in the
following situations:
R when using snow chains
R in deep snow
R on sand or gravel
Observe the information on warning lamps
(Y page 259).
Observe the information on display messages
(Y page 229). Activating/deactivating PRE-SAFE
®
Brake PRE-SAFE
®
 
Brake is only available in vehicles
with DISTRONIC PLUS.
X Press = or ; on the steering wheel
to select the  DriveAssist menu.
X Press the 9 or : button to select
PRE-SAFE Brake.
X Press the a button.
The current selection is displayed.
X To activate/deactivate:  press the a
button again.
When PRE-SAFE ®
 Brake is activated, the
multifunction 
 display shows the  Ä symbol
as long as the HOLD function is not activated
(Y page 189).
Vehicles with Parking Guidance:  if
PARKTRONIC is activated and you are driving
at a speed under 22 mph (35km/h) the  j
symbol for Parking Guidance is displayed
instead of the Ä symbol ( Y page 194)
If the  PRE-SAFE Brake: Sensors 
Deactivated message appears, the radar
sensor system is deactivated.
X Switch on the radar sensor system
(Y page 226).
For more information on PRE-SAFE ®
 Brake,
see ( Y page 67).
Activating/deactivating ATTENTION
ASSIST X
Press = or ; on the steering wheel
to select the  DriveAssist menu.
X Press 9 or : to select  Attention 
Assist.
X Press the a button.
The current selection is displayed.
X To activate/deactivate:  press the a
button again.
When ATTENTION ASSIST is activated, the
À symbol appears in the multifunction
display when the ignition is on. 222
Menus and submenus
On-board computer and displays