2014 MERCEDES-BENZ C-Class SEDAN warning

Either a very slight course-correcting brake
application, or none at all, may occu
rif:
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 Active Blind Spot Assist
(Y page 214) is activated in the on-board
computer.
X Turn the SmartKey to position 2in the
ignition lock.
Warning lamps 0002in the exterior mirrors
light up red for approximately
1.5 seconds and then turn yellow.
Active Lane Keeping Assist General notes
Active Lane Keeping Assist monitors the area
in front of your vehicle by means of a
camera 0002mounted at the top of the
windshield. Active Lane Keeping Assist
detects lane markings on the road and warns
you before you leave you rlane
unintentionally. If you do not react to the
warning, a lane-correcting applicatio nofthe
brakes can bring the vehicle back into the
original lane. 0002
Active Lane Keeping Assist camera
If you select km on the on-board computer in
the Display Unit Speed-/Odometer function (Y
page 215), Active Lane Keeping
Assist is activated starting at a speed of
60 km/h. If the miles display unit is selected,
the assistance range begins at 40 mph.
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
physics. Lane Keeping Assist cannot take into
account the road, traffic and weather
conditions. Lane Keeping Assist is merely 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
continuously keep your vehicle in its lane. G
WARNING
Active Lane Keeping Assist cannot always
clearly detect lane markings.
In such cases, Active Lane Keeping Assist
can:
R give an unnecessary warning and then
make a course-correcting brake application
to the vehicle
R not give a warning or intervene
There is a risk of an accident.
Always pay particular attention to the traffic
situation and keep within the lane, especially
if Active Lane Keeping Assist alerts you. Driving systems
199Driving and parking
Z

Terminate the intervention in a non-critical
driving situation.
The system may be impaired or may not
function if:
R there is poor visibility, e.g. due to
insufficien tillumination of the road, or due
to snow, rain, fog or spray
R there is glare, e.g. from oncoming traffic,
the sun or reflections (e.g .when the road
surface is wet)
R the windshield is dirty, fogged up, damaged
or covered, for instance by a sticker, in the
vicinity of the camera
R there are no, several or unclear lane
markings for a lane, e.g. in areas with road
construction work
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 the lane markings thus cannot be
detected
R the lane markings change quickly, e.g.
lanes branch off, cross one another or
merge
R the road is narrow and winding
R there are highly variable shade conditions
on the roadway
R no vehicle is detected in the adjacent lane
and there are broken lane markings
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
highway.
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
A lane-correcting brake application cannot
always bring the vehicle back into the original
lane. There is a risk of an accident.
Always steer, brake or accelerate yourself,
especially if Active Lane Keeping Assist warns
you or makes a lane-correcting brake
application. G
WARNING
Active Lane Keeping Assist does not detect
traffic conditions or road users. In very rare
cases, the system may make an inappropriate
brake application, e.g. after intentionally
driving over a solid lane marking. There is a
risk of an accident.
An inappropriate brake application may be
interrupted at any time if you steer slightly in
the opposite direction. Always make sure that
there is sufficient distance on the side for
other traffic or obstacles.
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. 200
Driving systemsDriving and parking

In addition, a lane with lane markings on both
sides must be recognized. The brake
application also slightly reduces vehicle
speed.
If a lane-correcting brake application occurs,
the following, for example, appears in the
multifunction display: 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 switch 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 Al
ane-correcting brake applicatio nis
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 214).
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 213) are shown in green. Lane
Keeping Assist is ready for use.
If Standard is selected, no warning
vibration occurs if:
R you have switched on the tur nsignals .In
this event, the warnings are suppressed
for a certain period of time.
R a driving safety syste mintervenes, such
as ABS, BAS or ESP ®
.
When Adaptive is selected, no warning
vibration occurs if:
R you have switched on the tur nsignals .In
this event, the warnings are suppressed
for a certain period of time.
R a driving safety syste mintervenes, 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 lanes quickly.
R you cut the corner on a sharp bend. Driving systems
201Driving and parking Z

Useful information
............................204
Important safety notes ....................204
Displays and operation ....................204
Menus and submenus ......................207
Display messages ............................. 222
Warning and indicator lamps in the
instrument cluster ............................248 203On-board computer and displays

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 25).Important safety notes
G
WARNING
If you operate information systems and
communication equipment integrated in the
vehicle 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
situatio npermits .Ifyou are not sure that this
is possible, park the vehicle paying attention
to traffic conditions and operate the
equipment when the vehicle is stationary. G
WARNING
If the instrument cluster has failed or
malfunctioned, 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
immediately.
You must observe the legal requirements for
the country in which you are currently driving
when operating the on-board computer.
The on-board computer only shows messages
or warnings from certain systems in the multifunction display
.You should therefore
make sure your vehicle is operating safely at
all times. Otherwise, a vehicle that is not
operating safely may cause an accident.
For an overview, see the instrument panel
illustration (Y page 31). Displays and operation
Instrument cluster lighting
The lighting in the instrument cluster, in the
displays and the controls in the vehicle
interior can be adjusted using the brightness
control knob.
The brightness control knob is located on the
bottom left of the instrument cluster
(Y page 31).
X Turn the brightness control knob clockwise
or counter-clockwise.
If the light switch is set to 0004,0014or
000B, 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. Coolant temperature display
G
WARNING
Opening the hood when the engine is
overheated 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.
The coolant temperature gauge is in the
instrument cluster on the left-hand side. 204
Displays and operationOn-board computer and displays

Operating an audio player or audio
media Example: CD/DVD changer display
0002
Current title
Audio data from various audio devices or
media can be played, depending on the
equipment installed in the vehicle.
X Switch on the audio system or COMAND
and select the audio player or medium, see
the separate operating instructions.
X Press the 0002or0005 button on the
steering wheel to select the Audio menu.
X To select the next/previous track:
briefly press the 0003or0004 button.
X To select a track from the track list
(rapid scrolling): press and hold the
0003 or0004 button until desired trac khas
been reached.
If you press and hold 0003or0004, the rapid
scrolling speed is increased. Not all audio
drives or data carriers support this function.
If track information is stored on the audio
device or medium, the multifunction display
will show the number and name of the track.
The curren ttrack does not appear in audio
AUX mode (Auxiliary audio mode: external
audio source connected). Video DVD operation Example
:CD/DVD change rdisplay
0002 Current scene
X Switch on COMAN Dand select video DVD;
see the separate operating instructions.
X Press the 0002or0005 button on the
steering wheel to select the Audio menu.
X To select the next/previous scene:
briefly press the 0003or0004 button.
X To select ascene from the scene list
(rapid scrolling): press and hold the
0003 or0004 buttonuntil desired scene
has been reached. Telephone menu
Introduction G
WARNING
If you operate informatio nsystems and
communication equipment integrated in the
vehicle 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 equipmen twhen the traffic
situation permits. If you are not sure that this
is possible, park the vehicle paying attention
to traffic conditions and operate the
equipment when the vehicle is stationary.
When telephoning, you must observe the
legal requirements for the country in which
you are currently driving. Menus and submenus
211On-board computer and displays Z

Assistance menu
Introduction In the
DriveAssist menu, you have the
following options:
R Displaying the assistance graphic
(Y page 213)
R Activating/deactivating
ESP ®
(Y page 213)
R Activating/deactivating PRE-SAFE ®
Brake
(Y page 214)
R Activating/deactivating ATTENTION
ASSIST (Y page 214)
R Activating/deactivating Blind Spot Assist
or Active Blind Spot Assist (Y page 214)
R Activating/deactivating Lane Keeping
Assis torA ctive Lane Keeping Assist
(Y page 214)
Displaying the assistance graphic X
Press the 0002or0005 button on the
steering wheel to select the DriveAssistmenu.
X Press 0003or0004 to select Assistance Graphic .
X Press the 000Bbutton.
The multifunction display shows the
DISTRONIC PLUS distance display in the
assistance graphi c(Ypage 179).
The assistance graphic can display the status
of and information from other driving systems
or driving safety systems. The assistance graphic shows:
R
the 0002 symbol when ATTENTION ASSIST
(Y page 192) is deactivated.
R the lane markings as bright lines when Lane
Keeping Assist (Y page 194)or Active Lane
Keeping Assist (Y page 199) is activated.
R the 0001 symbol when PRE-SAFE ®
Brake
(Y page 71) is deactivated.
Deactivating/activating ESP ® i
Observe the "Important safety notes"
section in the description of ESP
(Y page 68). 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.
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
Activating/deactivating ESP ®
on AMG
vehicles (Y page 69).
For further information about ESP ®
, see
(Y page 68).
X Start the engine.
X Press the 0002or0005 button on the
steering wheel to select the DriveAssist menu.
X Press the 0003or0004 button to select
ESP .
X Press the 000Bbutton.
X To deactivate: press000Bagain.
The 0015 warning lamp in the instrument
cluster lights up.
X To activate: press000Bagain.
The 0015 warning lamp in the instrument
cluster goes out. Menus and submenus
213On-board computer and displays Z

ESP
®
is deactivated if the 0015warning lamp
in the instrument cluste rlights up
continuously when the engine is running.
If the 000D warning lamp and the 0015
warning lamp are lit continuously, ESP ®
is not
available due to a malfunction.
Observe the information on warning lamps
(Y page 252).
Observe the information on display messages
(Y page 223).
Activating/deactivating PRE-SAFE ®
Brake PRE-SAFE
®
Brake is only available in vehicles
with DISTRONIC PLUS.
X Press the 0002or0005 button on the
steering wheel to selec tthe DriveAssist menu.
X Press the 0003or0004 button to select
PRE-SAFE Brake .
X Press the 000Bbutton.
The current selection is displayed.
X To activate/deactivate: press the000B
button again.
When PRE-SAFE ®
Brake is deactivated, the
assistance graphic shows the 0001symbol
in the multifunction display.
If the PRE-SAFE Brake: Sensors Deactivated message appears, the radar
sensor system is deactivated.
X Switch on the radar sensor system
(Y page 218).
For more information on PRE-SAFE ®
Brake,
see (Y page 71).
Activating/deactivating ATTENTION
ASSIST X
Press the 0002or0005 button on the
steering wheel to select the DriveAssistmenu.
X Press the 0003or0004 button to select
Attention Assist .X
Press the 000Bbutton.
The current selection is displayed.
X To activate/deactivate: press the000B
button again.
When ATTENTION ASSIST is deactivated,
the 0002 symbol appears in the
multifunction display in the assistance
graphics display.
For further information about ATTENTION
ASSIST, see (Y page 192).
Activating/deactivating Blind Spot
Assist X
Press the 0002or0005 button on the
steering wheel to select the DriveAssist menu.
X Press the 0003or0004 button to select
Blind Spot Assist .
X Press the 000Bbutton.
The current selection is displayed.
X To activate/deactivate: press the000B
button again.
If the Blind Spot Assist Sensors Deactivated or
Act. Blind Spot Asst. Sensors Deactivated message appears,
the radar sensor system is deactivated.
X Switch on the radar sensor system
(Y page 218).
For further information about Blind Spot
Assist, see (Y page 193).
For further information about Active Blind
Spot Assist, see (Y page 196).
Activating/deactivating Lane Keeping
Assist X
Press the 0002or0005 button on the
steering wheel to select the DriveAssist menu.
X Press the 0003or0004 button to select
Lane Keep. Asst. X
Press the 000Bbutton.
The current selection is displayed.
X Press 000Bto confirm. 214
Menus and submenusOn-board computer and displays