light MERCEDES-BENZ C-CLASS SALOON 2011 Owners Manual

Example: vehicles with automatic transmission
i
A further lane-correcting brake applica-
tion can only occur after your vehicle has
returned to the original lane. G
WARNING
Active Lane Keeping Assist does not keep
your vehicle in its lane. It is only an aid
designed to assist driving .Itis not a substitute
for attentive driving. Corrective braking may
not always be sufficient to return your vehicle
to its original lane. In such cases, you must
steer the vehicle yourselft o ensure that it
does not leave the lane.
Active Lane Keeping Assist cannot detect the
current traffic situation or other road users.
Ensure at all times that there is sufficient lat-
eral distance between you and other road
users or obstacles. In rare cases, broken lines
or certain structures on the road surface may
be detected by the system as solid lane mark-
ings. You can, for example, countersteer gen-
tly at any time to cancel inappropriate braking
action, e.g. if you intentionally drive across a
solid lane marking.
Active Lane Keeping Assist cannot take
weather conditions into account.
You are responsible for the vehicle's speed,
correc tsteering and for braking in good time.
Always adap tyour driving style to suit the
prevailing road and weather conditions.
Always pay attention to traffic conditions and
your surroundings. Otherwise, you may fail to
recognise dangers in time, cause an accident
and injure yourself and others. 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, such as
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 on vehicles with a trailer tow hitch, the
electrical connection to the trailer has been
correctly established.
R ESP ®
is deactivated.
R the transmission is not in position D.
R a loss of tyre pressure or a defective tyre
has been detected and displayed.
Active Lane Keeping Assist does not detect
road and traffic conditions. An inappropriate
brake application may be interrupted at any
time if:
R you steer slightly in the opposite direction.
R you use a turn signal.
R you clearly brake or accelerate.
Al ane-correcting brake applicatio nis inter-
rupted automatically if:
R a driving safety system intervenes, such as
ESP ®
, PRE-SAFE ®
Brake or Active Blind
Spot Assist.
R lane markings can no longer be recognised.
Activating Active Lane Keeping Assist Example: vehicles with automatic transmission214
Driving systemsDriving and parking

X
Activate Active Lane Keeping Assist using
the on-board compute r(Ypage 238).
Symbol :appears in the multifunction
display.
If you drive at speeds above 60 km/h and
lane markings are detected, symbol :is
shown in green .Active Lane Keeping Assist
is ready for use.
Trailer towing
If you attach a trailer, make sure that you have
correctly established the electrical connec-
tion. This can be accomplished by checking
the traile rlighting. Towing
atrailer Notes on towing
atrailer
Important safety notes G
WARNING
When reversing the vehicle towards the
trailer, make sure there is nobody between
the trailer and the vehicle.
Couple and uncouple the trailer carefully .If
you do no tcouple the trailer to the towing
vehicle correctly, the trailer could become
detached.
Make sure that the following values are not
exceeded:
R the permissible trailer drawbar noseweight
R the permissible trailer load
R the permissible rear axle load of the towing
vehicle
R the maximum permissible gross vehicle
weight of both the towing vehicle and the
trailer
You will find the applicable permissible val-
ues, which must not be exceeded, in the vehi-
cle documents.
You will find the values approved by the man-
ufacturer on the vehicle identification plates
and those for the towing vehicle in the "Tech-
nical data" section. G
WARNING
If the Check trailer hitch locking mechanism message appears in the multi-
function display while the vehicle is in motion,
pull over immediately and check whether the
ball coupling is correctly engaged. G
WARNING
Always observe the maximum speed permit-
ted in Germany for vehicle/trailer combina-
tions, even in countries where higher speeds
are permitted. This lowers the risk of an acci-
dent. G
WARNING
Never depress the brake pedal continuously
while the vehicle is in motion, e.g. never cause
the brakes to rub by applying constant slight
pedal pressure. This causes the brake system
to overheat, increases the braking distance
and can lead to the brakes failing completely. G
WARNING
On no account should you attempt to draw the
vehicle/trailer combination out by increasing
speed. G
WARNING
If you exceed the maximum noseweight when
using a carrier system on the ball coupling:
R the carrier system may be thrown around.
R the ball coupling and the carrier system
may become detached from the vehicle.
As a result, you may injure others or cause an
accident.
Do not exceed the maximum noseweight.
When driving with a loaded carrier system,
always adjust your driving style to the prevail-
ing road, traffic and weather conditions and
drive particularly carefully.
You can use carrier systems, e.g. bicycle
racks or load-bearing implements on the ball
coupling. The maximum noseweight of 75 kg
applies when using carrier systems on the ball
coupling. Towing
atrailer
215Driving an d parking Z

X
Pull the ball coupling in the direction of the
arrow until it engages in a vertical position.
Indicator lamp ?goes out. The power
socket folds down automatically.
Vehicles with a4-button multifunction
steering wheel: theTrailer hitch Check lock mech. message is show
nin
the multifunctio ndisplay until the ball cou-
pling has engaged.
Vehicles with a 12-button multifunc-
tion steering wheel: theTrailer hitch
Check lock mech. message is shown in
the multifunction display until the ball cou-
pling has engaged.
X Remove the protective cap fro mthe ball
coupling and store it in a safe place.
X Make sure that the ball of the ball coupling
is clean and that, depending on the trailer
specification, it is greased or dry (without
grease) when used. Coupling up a trailer
G
WARNING
Do not disconnect a trailer with an engaged
overrun brake. Otherwise, your hand could
become trapped between the bumper and
trailer drawbar.
X Make sure that the transmission is in posi-
tion P.
X Apply the parking brake.
X Position the trailer level behind the vehicle.
X Couple up the trailer. X
Establish the electrical connection
between the vehicle and the trailer.
X Check that the trailer lighting system is
working. Decoupling
atrailer G
WARNING
As soon as you raise the trailer drawbar, the
unladen vehicle rises slightly. The vehicle then
lowers to driving level.
Make sure tha tnobody is in the vicinity of the
wheel arch or the underbody. You could oth-
erwise trap yourself or others. G
WARNING
The vehicle is lowered as soon as you discon-
nect the trailer cable. Make sure that nobody
is in the vicinity of the wheel arch or the
underbody. You could otherwise trap yourself
or others.
As soon as you decouple the trailer, the unla-
den vehicle rises slightly. Make sure that you
or others are not injured in the process.
! Do not disconnect a trailer with an
engaged overrun brake. Otherwise, your
vehicle could be damaged by the rebound-
ing of the overrun brake.
X Make sure that the transmission is in posi-
tion P.
X Apply the parking brake.
X Secure the trailer against rolling away.
X Remove the trailer cable and decouple the
trailer. Folding in the ball coupling
i Fold the ball coupling back in if you are
not using the trailer tow hitch. G
WARNING
Make sure that no persons or animals are in
the pivoting range of the ball coupling. Other-
wise, they could be injured. 218
Towing
atrailerDriving an d parking

You can obtain further information about
installing the trailer electrics fro
maqualified
specialist workshop, e.g. aMercedes-Benz
Service Centre.
X To switch the connected power supply
on or off: turn the key in the ignition lock
to position 2or 0respectively. Bulb failure indicator for LED lamps
i If LED lamps are fitted in the trailer, an
error message may appear in the multi-
function display even if there is no fault. The
reason for the error message may be that
the curren thas falle nbelow the minimum
of 50 milliamperes (mA).
To ensure reliable operation of the bulb failure
indicator, each LED chain in the trailer lighting
must be guaranteed a minimum current of
50 mA. Trailer with 7-pin connector
General information If your trailer has a 7-pin connector, you can
connect it to the 13-pin socket on the ball
coupling using an adapter or, if necessary, an
adapter cable. Both of these can be obtained
at a qualified specialist workshop, e.g. at a
Mercedes-Benz Service Centre.
Fitting the adapter X
Open the socket cover.
X Insert the connector with lug :into
groove ;on the socket and turn the con-
nector clockwise to the stop.
X Let the cover engage.
X If you are using an adapter cable, secure
the cable to the trailer with cable ties.
! Make sure that there is sufficien tcable
play so that the cable canno tbecome
detached when cornering. 220
Towing
atrailerDriving an d parking

G
WARNING
At temperatures just above freezing point, the
street may be icy, especially in wooded areas
or on bridges. If you do not adapt yourd riving
style to the conditions, the vehicle could skid.
For this reason, adapt yourd riving style and
speed to the weather conditions.
Changes in the outside temperature are dis-
played after a short delay. Operating the on-board computer
The on-board computer is activated as soon
as you turn the key to position 1in the ignition
lock. You can use the on-board computer to
call up informatio nrelating to your vehicle
and to make and adjust settings.
i You can have certain functions set at a
qualified specialist workshop, e.g. a
Mercedes-Benz Service Centre.
Example:
R automatic door lock
R speed limit for winter tyres
You can obtain information about this at
any Mercedes-Benz Service Centre.
You can control the multifunction display and
the settings in the on-board computer using
the buttons on the multifunction steering
wheel. :
Multifunction display
; W Increases the volume
= X Decreases the volume
? C Scrolls through lists/adjusts val-
ues/confirms display messages
A V Selects a menu
i If you press and hold the Vbutton, the
standard display appears.
i In the Day. driv. lights: menu, you
can use the WorX button to switch
the function on or
off .Y
ou cannot adjust
the volume when in the Day. driv. lights: menu.
Multifunction display
To activate the multifunction display:
R switch on the ignition.
R switch on the lights.
R open the driver's door. Displays and operation (4-button multifunction steering wheel)
223On-board computer and displays Z

Menu overview
Function
:
Standard display
(Ypage 225)
Shows the standard display or resets the trip meter ;
Trip computer
(Ypage 226)
Displays or resets the trip computer =
Range(Y
page 226) ?
Current fuel consumption
A
Digital speedometer
B
Message memory(Y
page 248)C
Service(Y
page 326)
Calls up the service due date D
Tyre pressure loss warnin
gsystem(Y page 362) E
Daytime driving lights(Y
page 226)Standard display X
Press and hold the Vbutton on the
steering wheel, until the standard display
with trip meter :and total distance
recorder ;is shown. Displays and operation (4-button multifunction steering wheel)
225On-board computer and displays Z

X
To reset the trip meter: press and hold
the V until the standard display
appears.
X Press and hold the Cbutton until the
value has been reset. Trip computer
X Press the Vbutton on the steering
wheel repeatedly until the trip computer
appears. :
Distance
; Average speed
= Time
? Average fuel consumption
X To reset the trip computer: press and
hold the Cbutton on the steering wheel
until the values have been reset. Calling up the range
X Press the Vbutton on the steering
wheel repeatedly until the approximate
range appears.
The approximate range which can be covered
depends on the fuel level and your current
driving style .Ifthere is only a small amount
of fuel left in the fuel tank, the display shows
a vehicle being refuelled Cinstead of the
range. Switching the daytime driving lights
on/off
If you have activated the Day. driv.lights: function and the light switch is in the Ã
position, the daytime driving lights are
automatically switched on during daylight
hours when the engine is running. When it is
dark, the side lamps and the dipped-beam
headlamps are switched on automatically.
On vehicles with daytime driving lamps, the
factory setting is on .
If you want to change the setting for the Day. driv. lights: function, you have to turn
the key in the ignition lock to position 1.
X Press the Vbutton on the steering
wheel repeatedly until the Day. driv. lights: menu appears.
You will see the selected setting: on or
off .
X Press the WorX button to change
the setting. Displays and operation (12-button
multifunction steering wheel)
Coolant temperature gauge
The coolant temperature gauge is in the
instrumentc lusteront he left-hand side.
Under normal operating conditions and with
the specified coolant level, the coolant tem-
perature may rise to 120 †.
At high outside temperatures and when driv-
ing uphill, the coolant temperature may rise
to the end of the scale. Rev counter
The red band in the rev counter indicates the
engine's overrevving range.
! Do not drive in the overrevving range.
Doing so will damage the engine.
The fuel supply is interrupted to protect the
engine when the red band is reached. 226
Displays and operation (12-button multifunction steering wheel)On-board computer and displays

Outside temperature display
The outside temperature display is in the mul-
tifunction display (Y page 228). G
WARNING
At temperatures just above freezing point, the
street may be icy, especially in wooded areas
or on bridges. If you do not adapt your driving
style to the conditions ,the vehicle could skid.
For this reason, adapt your driving style and
speed to the weather conditions.
Changes in the outside temperature are dis-
played after a short delay. Speedometer with segments
The segments in the speedometer indicate
which speed range is available.
Cruise control (Y page 178) activated:
The segments light up from the stored speed
to the maximum speed.
Variable SPEEDTRONIC (Y page 180) activa-
ted:
The segments light up from the start of the
scale to the selected limit speed.
DISTRONIC PLUS (Y page 183) activated:
One or two segments in the set speed range
light up.
DISTRONIC PLUS detects a vehicle in front:
The segments between the speed of the vehi-
cle in front and the stored speed light up. Operating the on-board computer
Overview The on-board computer is activated as soon
as you turn the key to position 1in the ignition
lock.
You can control the multifunction display and
the settings in the on-board computer using
the buttons on the multifunction steering
wheel. :
Multifunction display
; Switches on LINGUATRONIC; see the sep-
arate operating instructions
= Right control panel
? Left control panel
A Back button
Left control panel =
; R
Calls up the menu and menu bar 9
:
Press briefly:
R
Scrolls through lists
R Selects a submenu or function
R In the Audio menu: selects a
stored station, an audio track or
a video scene
R In the Tel (telephone) menu:
switches to the phone book and
selects a name or telephone
number Displays and operation (12-button multifunction steering wheel)
227On-board computer and displays Z

Menu overview
The number of menus show ndepends on the optional equipment in the vehicle. Function
:
Trip menu (Y
page 231) ;
Navi menu (navigation details) (Y
page 232)=
Audio menu (Y
page 233) ?
Tel menu (telephone) (Y
page 235)A
Assist. menu (assistance) (Y
page 236)B
Serv. menu (Y
page 238)
R calls up display messages ( Ypage 249)
R tyre pressure loss warning (Y page 362)
R tyre pressure monitor (Y page 363)
R ASSYST PLUS service interval display (Y page 326)C
Settings menu (Y
page 238) D
AMG menu in AMG vehicles (Y
page 245)The
Audio ,
Navi and
Tel menus differ slightly in vehicles with an audio system and vehicles
with COMAND Online. The examples given in this Owner's Manual apply to vehicles equipped
with COMAND Online. 230
Displays and operation (12-button multifunction steering wheel)On-board computer and displays

X
Press =or; on the steering wheel
to select the Assist. menu.
X Press 9or: to select Speed Lim.
Asst. .
X Press a.
The multifunction display shows Speed
Limit Assist.
X Press :.
The curren tselection is displayed.
X To activate or deactivate: pressa.
If Speed Limit Assist is operational and the
message function is activated, the multifunc-
tion display shows the Äsymbol when the
ignition is switched on.
Showing distance display This function is only available with DIS-
TRONIC PLUS.
X
Press =or; on the steering wheel
to select the Assist. menu.
X Press the 9or: button to select
Distance display .
X Press a.
The DISTRONIC PLUS distance display
(Y page 189) appears in the multifunction
display.
Deactivating/activating ESP ®G
WARNING
If the ÷ warning lamp in the instrument
cluster flashes, proceed as follows:
R Under no circumstances should you deac-
tivate ESP ®
.
R When pulling away, only depress the accel-
erator pedal as far as is necessary.
R Adapt your driving style to the prevailing
road and weather conditions.
The vehicle may otherwise begin to skid.
If you drive too fast, ESP ®
cannot reduce the
risk of an accident. ESP ®
cannot override the
laws of physics. Activating/deactivating ESP
®
on AMG vehi-
cles (Y page 76).
For further information about ESP ®
, see
(Y page 75).
X Start the engine.
X Press =or; on the steering wheel
to select the Assist. menu.
X Press the 9or: button to select
ESP .
X Press the abutton.
X To deactivate: pressaagain.
The å warning lamp in the instrument
cluster comes on. G
WARNING
If the å warning lamp in the instrument
cluster lights up when the engine is running,
ESP ®
is deactivated or is unavailable due to a
malfunction. The risk that your vehicle may
start to skid then increases in certain situa-
tions.
Always adapt your driving style to the prevail-
ing road and weather conditions.
X To activate: pressaagain.
The å warning lamp in the instrument
cluster goes out.
Activating/deactivating the PRE-SAFE ®
Brake PRE-SAFE
®
Brake is only available in vehicles
with DISTRONIC PLUS.
X Press =or; on the steering wheel
to select the Assist. menu.
X Press 9or: to select PreSafe Brake .
X Press the abutton.
The curren tselection is displayed.
X To activate/deactivate: pressa
again.
When PRE-SAFE ®
Brake (Y page 78) is acti-
vated, the multifunction display shows the Displays and operation (12-button multifunction steering wheel)
237On-board computer and displays Z