2015 MERCEDES-BENZ C-CLASS COUPE warning light

Important safety notes
If you fail to adapt your driving style, Activ eLane
Keepin gAssist can neither reduce th eriskofan
acciden tnor override th elaws of physics .Active
Lan eKeepin gAssist canno ttak ea ccoun tof
road and weather conditions. It may no tdetect
traffic situations. Activ eLaneK eepin gAssist is
only an aid. You are responsible for th edistance
to th evehicle in front, for vehicle speed, for
braking in good tim eand for staying in lane.
Activ eLaneK eepin gAssist canno tcontin uously
keep your vehicle in its lane. G
WARNING
Activ eLaneK eepin gAssist canno talways
clearly detect lane markings.
In suc hcases, Activ eLaneK eepin gAssist
can:
R giv eanu nnecessar ywarning and then
mak eac ourse-correcting brak eapplication
to th evehicle
R neither giv eawarning no rintervene
Ther eisar iskofana ccident.
Always pay particula rattentio ntothetraffic
situation and keep within th elane ,especially
if Activ eLaneK eepin gAssist alert syou. Ter-
minate th einterventio ninanon-critical driv-
ing situation.
The system may be impaired or may no tfunction
if:
R there is poor visibility, e.g .due to insufficient
illumination of th eroad ,ord ue to snow, rain,
fog or spray
R there is glare, e.g .fro mo ncom ingt raffic, the
sun or reflectio nfromo ther vehicle s(e.g. if
th er oad surface is wet)
R thew indscree nisdirty, miste dup, damaged
or covered, for instance by asticker, in the
vicinity of th ecamera
R ther adar sensor sinthefron torr ear bumpers
or th eradiator trim are dirty, e.g .obscured by
snow
R no or several, unclear lane markings are pres-
en tfor on elane ,e.g.inac onstruction area
R thel ane markings are worn away, dark or cov-
ere dup, e.g .bydirt or snow
R thed istanc etothevehicle in fron tistoosmall
and th elane markings thus canno tbedetec-
ted R
thel ane markings chang equickly, e.g. lanes
branch off ,cross on eanother or merge
R ther oad is narrow and winding
R there are highly variable shad econdi tionson
th er oad
If no vehicle is detected in th eadjacent lane and
broke nlane markings are detected, no lane-cor-
rectin gbrak eapplication is made.
Warning vibration through th esteering
wheel
Aw arning may be given if afront wheel passes
ove ralane marking. It will warn you by mean sof
intermitten tvibration in th esteering wheel for
up to 1. 5seconds.
Lane-correcting brak eapplication
If you leave your lane under certain circumstan- ces ,the vehicle will brak ebriefly on on eside.
This is intended to help you return th evehicle to
th eo riginal lane. G
WARNING
Al ane-correcting brak eapplication cannot
always brin gthe vehicle back int othe original
lane .Ther eisar iskofana ccident.
Always steer ,brak eora ccelerate yourself,
especially if Activ eLaneK eepin gAssist warns
you or makes alane-correcting brak eappli-
cation. If
al ane-correcting brak eapplication occurs,
display :appear sinthemultifunction display.
The brak eapplication also slightly reduces driv-
ing speed.
This function is available in aspee drange
between 60 km/h and 20 0km/ h.
Al ane-correcting brak eapplication can be made
after driving ove ralane markin gdetected as
bein gsolid or broken. Before this, awarning 224
Driving systemsDriving and pa
rking

must have been issued by means of intermittent
vibration through the steering wheel. In addi-
tion, alane with lane markings on both sides
must be detected.
In the case of abroken lane marking being
detected, alane-correcting brake application
can only be made if avehicl ehas been detected
in the adjacent lane. Oncoming vehicles, over-
taking vehicles and vehicles in adjacent lanes
can be detected.
i Af
urther lane-correcting brake application
can only occur after yourv ehiclehas returned
to the original lane.
No lane-correcting brake application occurs if:
R you clearl yand activel ysteer, brake or accel-
erate
R you cut the corner on asharp bend
R you have switched on the turn signal
R ad riving safety system intervenes, such as
ESP ®
,P RE-SAFE ®
Brake or Active Blind Spot
Assist
R you have adopted asporty driving style with
high cornering speed sorhigh rates of accel-
eration
R ESP ®
is deactivated
R the transmission is not in position D
R on vehicles with atrailert ow hitch, the elec-
trical connection to the traile rhas been cor-
rectly established
R aloss of tyre pressure or adefective tyre has
been detected and displayed
R an obstacl einthe lane in which you are driving
has been detected
Active Lane Keeping Assist may not detect other
road users or traffic situations. An inappropriate
brake application may be interrupted at any time
if:
R you steer slightly in the opposite direction
R you switch on the turn signal
R you clearl ybrake or accelerate
Al ane-correcting brake application is interrup-
ted automatically if:
R ad riving safety system intervenes, such as
ESP ®
,P RE-SAFE ®
Brake or Active Blind Spot
Assist
R lane markings are no longer detected Activating/deactivatin
gActive Lane
Keeping Assist X
To activate: press button ;.
Indicator lamp :lights up. The Lane Keep‐ Lane Keep‐
ing
ing Assist
Assist on
onmessage appears in the mul-
tifunction display.Ifa ll conditions have been
satisfied, awarning or steering intervention
may be made.
If you drive at speed sabove 60 km/h and lane
markings are detected, the lines in the assis- tance graphic display (Y page 243) are
shown in green. Active Lane Keeping Assist is
read yfor use.
X To deactivate: press button;.
Indicator lamp :goes out. Active Lane Keep-
ing Assist is deactivated. The Lane
Lane Keeping Keeping
Assist off
Assist off message appears in the multi-
function display.
Selecting Standard or Adaptive setting X In the Assistance
Assistance menu on the on-board
computer, select the Active Lane Keep‐
Active Lane Keep‐
ing Assist
ing Assist function (Ypage 246).
X Select Standard
Standard orAdaptive
Adaptive.
When Standard
Standard is selected, no warning vibra-
tion occurs if:
R you have switched on the turn signals. In
this event, the warnings are suppressed for
ac ertain perio doftime.
R ad riving safety system intervenes, such as
ABS, BAS or ESP ®
.
When Adaptive
Adaptive is selected, no warning vibra-
tion occurs if:
R you have switched on the turn signals. In
this event, the warnings are suppressed for
ac ertain perio doftime.
R ad riving safety system intervenes, such as
ABS, BAS or ESP ®
.
R you accelerate hard, e.g. kickdown. Driving systems
225Driving and parking Z

R
you brak ehard.
R you steer actively, e.g. swerve to avoid an
obstacle or chang elan eq uickly.
R you cut th ecorner onashar pbend.
In order that you are warned only when neces-
sar yand in goo dtimeify ou cross th elan em ark-
ing, th esystem detects certain condition sand
warn syou accordingly.
The warnin gvibration occur searlier if:
R you approac hthe outer lan emarking on a
bend
R ther oadh as ver ywide lanes, e.g. amotorway
R thes ystem detects soli dlanem arkings
The warnin gvibration occur slater if:
R ther oadh as narrow lanes
R you cut th ecorner onabend
Towing atrailer
If you couple up atrailer ,makes uret haty ou
hav ecorrectly established th eelectrica lcon-
nection .This can be accomplished by checking
th et railer lighting. Towing
atrailer Important safety notes
G
WARNING
You could lose control of th evehicle/trailer
combination if it begins to swerve. The vehi-
cle/trailer combination could eve noverturn.
There is ariskofana ccident.
On no accoun tshould you attemp tto
straighten out th evehicle/trailer combina-
tion by increasing speed. Decrease your
speed and do no tcountersteer. Brake if nec-
essary. G
WARNING
If th emaximum permissibl eload for acarrier
system is exceeded ,the carrie rcould come
loos efromt hevehicl eand endanger other
roa dusers. There is ariskofana ccidentand
injury.
Never exceed th emaximum permissibl eload
when usin gacarrier. Exceedin
gthe maximum permissibl enose-
weigh tofthetrailer drawbar on th eball coupling
may caus edamage to th efollowing:
R your vehicle
R trailer
R ball coupling
R trailer to whitch
The vehicle/trailer combination could become
unstable.
If th enoseweight used is lower than th emini-
mum permissibl enoseweight ,the vehicle/
trailer combination could also become unstable.
To avoid hazardous situations:
R mak esuretoc heckthen oseweight before
eac hjourney
R use adrawbar noseweight as close as possi-
ble to th emaximum noseweight
R do no texcee dthe maximum permissible
noseweight
R do no tuse an oseweight lower than th emin-
imum noseweight
Mak esuret hatthe followin gvalue sare not
exceeded:
R thep ermissibl etrailer drawbar noseweight
R thep ermissibl etrailer load
R thep ermissibl erear axl eload of th etow ing
vehicle
R them aximum permissibl egross vehicle
weigh tofbotht he towin gvehicl eand the
trailer
The applicable permissibl evalues, whic hmust
no tbee xceeded,can be found:
R in your vehicl edocuments
R on th eidentification plates of th etrailer tow
hitch and th etrailer
R on th evehicl eidentification plate
If th evalue sdiffer ,the lowes tvalue applies.
You will fin dthe value sapprove dbythemanu-
facturer on th evehicl eidentification plates and
those for th etow ingv ehicl eunder "Technical
data" (Y page 378). G
WARNING
If you release th eball couplin goritdoes not
engage correctl ywhen foldin gin, it will swing
out .Within pivotin grange of th eball coupling,
there is an increase driskofana ccidentand
injury. 226
Towin
gatrailerDriving and pa rking

X
Position the trailer horizontally 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 work-
ing.
X Push the combination switch upwards/down-
wards
X Check whether the corresponding turn signal
on the trailer is flashing.
Ac onnected trailer is only detected when the
electrical connection is established correctly
and when the lighting system is working prop- erly. The function of other systems, such as
ESP ®
,P ARKTRONIC, Active Parking Assist,
Active Blind Spot Assist or Lane Keeping
Assist also depends on this. Uncoupling
atrailer G
WARNING
If you uncouple atrailer with an engaged over-
run brake, you could trap your hand between
the vehicle and the trailer drawbar. This poses ar isk of injury.
Do not uncouple atrailer with an engaged
overrun brake. G
WARNING
Vehicles with level control:
If you disconnect the trailer cable, the vehicle is lowered. This can cause you or others to
become trapped between the vehicle body
and tyres, or underneat hthe vehicle. This
poses arisk of injury.
Make sure that no-one is in the immediate
vicinit yofthe wheel arch or underneat hthe
vehicle when disconnectin gthe trailer cable.
! Do not disconnect
atrailer with an engaged
overrun brake. Otherwise, your vehicle could
be damaged by the rebounding of the overrun
brake.
! Remove the installed adapter cable before
folding in the ball coupling. Otherwise, dam-
age may occur to the rear bumper and the
adapter cable. X
Make sure that the transmission is in position
P.
X Apply the electric parking brake.
X Secure the trailer against rolling away.
X Remove the trailer cable and decouple the
trailer. Trailer power supply
! You can connect accessories to the perma-
nent power supply up to amaximum of 240 W.
You cannot charge atrailer battery using the
power supply.
When it leaves the factory, your vehicle's trailer
socket is equipped with apermanen tpower
supply and apower supply that is switched on
via the ignition lock.
The permanen tpower supply is supplied via
trailer socket pin 9.
The power supply that is switched on via the
ignition lock is supplied via trailer socket pin 10.
The trailer's permanen tpower supply is
switched off in the event of low vehicle supply
voltage and after six hours at the latest.
You can find more information about fitting the
trailer electric sataqualified specialist work-
shop.
X To switch the connected power supply on
or off: turn the key to position 2or 0respec-
tively (Y page 145). Failure check for LEDs
If LED lamps are fitted in the trailer, amalfunc-
tion message may appear in the multifunction
display even if there is no fault. The reason for
the error message may be that the curren thas
fallen below the minimum of 50 mA.
To ensure reliable operation of the failure indi-
cator, each LED chain in the trailer lighting must
be guaranteed aminimum curren tof50mA. Trailer with 7-pin connector
General notes Trailer with 7-pin connector:
you can connect
to the 13-pin socket on the ball coupling using
an adapter or, if necessary, an adapter cable. Towing
atrailer
229Driving and parking Z

Important safety notes
G
WARNING
Operating th eintegrate dinformation systems
and communication sequipmen tinthevehicle
while driving will distrac tyou from traffic con-
ditions. You could then lose control of the
vehicle. Ther eisariskofana ccident.
Only operate these device sifroad traffic con-
dition spermit .Ifyou are unsure about the
surroundin gconditi ons, pull ove rtoasafe
location and mak eentrie sonlyw hile th evehi-
cle is stationary.
You must observ ethe legal requirements for the
country in whic hyou are currentl ydriving when
operating th eon-bo ard computer. G
WARNING
If th einstrumen tcluste rhas faile dormal-
functioned, you may no trecognise function
restriction srelevan ttosafety. The operating
safet yofy our vehicl emay be impaired .There
is ar iskofana ccident.
Drive on carefully. Hav ethe vehicl echecked
at aq ualified specialist workshop immedi-
ately.
If th eoperating safet yofyour vehicl eis
impaired ,park th evehicl esafely as soo naspos-
sible .Contac taqualified specialist workshop.
The on-board computer only shows message sor
warning sfromc ertai nsystems in th emultifunc-
tion display. You should therefor emakes ure
your vehicl eisoperating safely at all times.
Fo rano verview, see th einstrumen tcluste rillus-
tration (Y page 32). Display
sand operation Instrumen
tcluster lighting The lighting in th
einstrumen tcluster, in th edis-
plays and th econtrols in thevehicl einterior can
be adjusted usin gbrightness control knob :.
X Turn brightness control knob :up or down.
If you tur nthe ligh tswitch (Y page 118) to the
T, ÃorL position ,the brightness
will depend upon th ebrightness of th eambi-
en tlight.
i The ligh
tsensor in th einstrumen tcluster
automatically control sthe brightness of the
multifunction display.
In daylight, th edisplays in th einstrument
cluste rare lit .Adimming function is no tpos-
sible in daylight. Speedometer with segments
The speedometer is divided int osegments on
Mercedes-AM Gvehicles or vehicles with
DISTRONI CPLUS.
The segments in th espeedometer indicate
whic hspee drange is available.
R Cruis econtro lactivated (Y page 180):
The segments ligh tupfromt hestore dspeed
to th etype-tested maximum speed.
R Variable SPEEDTRONI Cactivated
(Y page 182):
The segments ligh tupfromt hestart of the
scale to th eselected limi tspeed.
R DISTRONI CPLUSa ctivated (Y page 184):
On eort wo segments in th eset spee drange
ligh tup.
R DISTRONI CPLUSd etects avehicl einf ront
moving mor eslowly than th estoreds peed: 232
Display
sand operationOn-boar dcomputer and displays

The segment
sbetween the speed of the vehi-
cle in front and the stored speed light up. Rev counter
! Do not drive in the overrevving range. Doing
so will damage the engine.
The red band in the rev counter indicates the
engine's overrevving range.
The fuel supply is interrupted to protec tthe
engine when the red band is reached. Outside temperature display
You should pay special attention to road condi-
tions when temperatures are around freezing
point.
Bear in mind that the outside temperature dis-
play indicates the measured air temperature
and not the road surface temperature.
The outside temperature display is in the multi-
function display (Y page 234).
Changes in the outside temperature are dis-
played after ashort delay. Coolant temperature gauge
G
WARNING
If you open the bonnet while the engine is
overheatin gorwhile there is afire in the
engine compartment,y ou could come into
contact with hot gases or other leaking ser-
vice products. There is adanger of injury.
Allow an overheatin gengine to cool down
before opening the bonnet .Ifthere is afire in
the engine compartment,l eave the bonnet
closed and notify the fire brigade.
The multifunction display shows the coolant
temperature gauge in the lower section of the
rev counter (Y page 32).
At high outside temperatures and when driving
uphill, the coolant temperature may rise to the
end of the scale.
Under normal operating conditions and with the
specified coolant level, the coolant temperature may rise to 120 †. Operating the on-board computer
:
Multifunction display
; Right control panel
= Left control panel
X To activat ethe on-board computer: turn
the key to position 1in the ignition lock.
Vehicles with manual transmission: if you
remove the key, then quickly re-insert it and turn
to position 1,the instrument cluster and, as a
result, the on-board computer as well, are not
activated.
You can control the multifunction display and
the settings in the on-board computer using the button sonthe multifunction steerin gwheel.
Left control panel ò R
Opens the menu list 9
: Press briefly:
R Scrolls through lists
R Select samenu or function
R In the Radio Radio orMedia
Media menu:
opens the track or station list and
selects astation ,anaudio track or
av ideo scene
R In the Telephone Telephone menu: switches
to the phone book and selects a
name or atelephone number Displays and operation
233On-board computer and displays Z

R
DISTRONI CPLUS(Ypage 184)
R Traffi cSignA ssist (Y page 216)
R Distance warning functio nand autono-
mou sbraking system of COLLISION PRE-
VENTION ASSIST PLU S(Ypage 69)
R PRE-SAFE ®
Brake (Y page 75)
R Blind Spo tAssist (Y page 218 )orActive
Blind Spo tAssist (Y page 221)
R ATTENTION ASSIST (Y page 215)
R Lane Keeping Assist (Y page 219)orActive
Lane Keeping Assist (Y page223)
X Press :to display the ATTENTION ASSIST
assessment. Servic
emenu
Introduction Depending on the equipment fitted in the vehi-
cle, you have the following options in the Ser‐
Ser‐
vice
vice menu:
R Calling up display messages in the message
memory (Y page253)
R Restarting the tyre pressure loss warning sys-
tem (Y page358) or checking the tyre pres-
sure electronically (Y page360)
R Calling up the service due date
(Y page3 25)
R Displaying the AdBlue ®
level and range
(Y page2 44) (BlueTEC vehicles only)
Displayin gthe AdBlue ®
level and range The
AdBlue
AdBlue menu is only available in BlueTEC
vehicles.
X Press òon the steering whee ltoopen the
menu list.
X Press :or9 on the steering whee lto
select the Service
Service menu.
X Confirm by pressing aon the steering
wheel.
X Press :or9 to select the AdBlue AdBlue
submenu.
X Press ato confirm yours election.
The range and AdBlue ®
level appear in abar
grap hint he multifunction display.
Observe the informatio nand notes on "Refuel-
ling" (Y page169). Setting
smenu
Introduction Depending on the equipment fitted in the vehi-
cle, you have the following options in the
Set‐ Set‐
tings
tings menu:
R Changing assistance settings (Y page244)
R Changing head-up display settings
(Y page2 46)
R Changing the light settings (Y page247)
R Changing the instrument cluster settings
(Y page2 48)
R Changing the vehicl esettings (Y page248)
R Restoring the factory settings (Y page249)
Assistanc esubmenu Deactivating/activating ESP
®
Observe the "Important safety notes" section in the description of ESP ®
(Y page7 2). G
WARNING
If you deactivate ESP ®
,E SP ®
no longer sta-
bilises the vehicle. There is an increase drisk
of skidding and an accident.
Only deactivate ESP ®
in the situations descri-
bed in the following.
It may be best to deactivate ESP ®
in the follow-
ing situations:
R when using snow chains
R in deep snow
R on sand or gravel
Deactivating/activating ESP ®
on Mercedes-
AMG vehicles (Y page73).
For further informatio nabout ESP ®
,s ee
(Y page7 1).
X Start the engine.
X Press òon the steering whee ltoopen the
menu list.
X Press :or9 on the steering whee lto
select the Settings
Settings menu.
X Confirm by pressing aon the steering
wheel.
X Press :or9 to select the Assistance Assistance
submenu.
X Press ato confirm.
X Select ESP
ESPwith : or9. 244
Menus and submenusOn-board computer and displays

X
Press ato confirm.
The curren tselection appears.
X To activate/deactivate: press theabut-
ton again.
If the å warning lamp in the instrument
cluster lights up when the vehicle is ready to
drive, ESP ®
is deactivated.
If the ÷ andå warning lamps light up
continuously, ESP ®
is not availabl edue to amal-
function.
Observe the information on warning lamps
(Y page 287).
Observe the information on display messages
(Y page 254).
Traffic Sign Assist
You can activat eordeactivate the warning func-
tion of Traffic Sign Assist in the Traffic TrafficSign
Sign
Assist
Assist menu. When the message function is
activated, detected traffic signs and information appear in the multifunction display for five sec-
onds.
X Press òon the steerin gwheel to open the
menu list.
X Press the :or9 button on the steering
wheel to select the Settings
Settings menu.
X Confirm by pressing aon the steering
wheel.
X Press :or9 to select the Assistance Assistance
submenu.
X Press ato confirm.
X Select Traffic Sign Assist Traffic Sign Assist with: or
9.
X Press ato confirm.
The curren tselection appears.
X Activate or deactivat
ethe warning func-
tion: press aagain.
For further information about Traffic Sign Assist, see (Y page 216).
Activating/deactivating COLLISION PRE-
VENTION ASSIST PLUS
X Press òon the steerin gwheel to open the
menu list.
X Press :or9 on the steerin gwheel to
select the Settings
Settings menu.
X Confirm by pressing aon the steering
wheel.
X Press :or9 to select the Assistance Assistance
submenu. X
Press ato confirm.
X Select Collision Prevention Collision Prevention with9
or :.
X Press ato confirm.
The curren tselection appears.
X To activate/deactivate: press theabut-
ton again.
When COLLISION PREVENTION ASSIST PLUS
is deactivated, the æsymbol appears in
the multifunction display in the Assistance Assistance
graphic
graphic menu.
For further information about COLLISION PRE-
VENTION ASSIST PLUS, see (Y page 69).
Activating/deactivating PRE-SAFE ®
Brake PRE ‑SAFE ®
Brake is only availabl efor vehicles
with the Drivin gAssistance package.
X Press òon the steerin gwheel to open the
menu list.
X Press :or9 on the steerin gwheel to
select the Settings
Settings menu.
X Confirm by pressing aon the steering
wheel.
X Press :or9 to select the Assistance Assistance
submenu.
X Press ato confirm.
X Select PRE-SAFE Brake
PRE-SAFE Brake with: or9.
X Press ato confirm.
The curren tselection appears.
X To activate/deactivate: press theabut-
ton again.
When PRE-SAFE ®
Brake is deactivated, the
æ symbol appears in the multifunction dis-
play in the Assistance graphic Assistance graphic menu.
Further information on PRE‑ SAFE®
Brake
(Y page 75).
Activating/deactivating Blind Spot Assist
X Press òon the steerin gwheel to open the
menu list.
X Press :or9 on the steerin gwheel to
select the Settings Settings menu.
X Confirm by pressing aon the steering
wheel.
X Press :or9 to select the Assistance Assistance
submenu.
X Press ato confirm.
X Select Blind Spot Assist Blind Spot Assist with: or
9. Menus and submenus
245On-board computer and displays Z