2015 MERCEDES-BENZ C-CLASS COUPE bonnet

R
the bonnet is closed
R the driver's door is close dand the driver's
seat belt is fastened
If the conditions for automatic engine switch-off
ar en ot al lfulfilled ,the è ECO symbo lis
shown in yellow.
All of the vehicle' ssystems remai nactive when
the engine is switched off automatically.
Al lv eh icle s(exce pt Mercedes-AMG vehi-
cles): automatic engine switch-off can take
place amaximum of fou rtimes in arow (initial
switch-off ,the nt hre esubsequen tswitch-offs).
The è ECO symbo lisshown in yellow in the
multifunctio ndisplay after the engine ha sbeen
started automaticall yfor the fourth time. When
the è ECO symbo lisshown in green in the
multifunctio ndisplay ,automatic engine switch-
off is agai npossible.
Mercedes-AMG vehicles: the numberofcon-
secutive automatic engine stop sisunlimited.
Vehicle swithm anual transmission The ECO start/sto
pfunctio nswitches off the
engine automaticall yatlowspeeds.
X Brake the vehicle.
X Shift to neutral N(follow gearshift instruc-
tion :to shift to neutral N,ifnecessary).
X Releas ethe clutch pedal.
The engine is switched off automatically.
Vehicle switha utomatic transmission
If the vehicl eisbraked to astandstil lwitht he
transmission in Dor N,t he ECO start/sto pfun c-
tio ns witches off the engine automatically.
The HOLD functio ncan be activated if the
engine ha sbeens witched off automatically. It is
the nnot necessary to continue applying the
brakes durin gthe automatic stop phase. When
yo ud epress the accelerator pedal, the engine
starts automaticall yand the braking effect of
the HOLD functio nisd eactivated. Automati
cengin estart General notes
The engine is started automaticall yif:
R yous witch off the ECO start/sto pfun ctio nby
pressing the ECO button
R youd epress the accelerator pedal
R youe ngag erevers egear R
R youu nfasten your seat belt or open the driv-
er' sd oor
R the vehicl estarts to roll
R the brake syste mrequires this
R the temperatur einthe vehicl einterio rdevi-
ate sfromt he se tran ge
R the syste mdetects moisture on the wind-
screen when the air-conditioning syste mis
switched on
R the battery's charge status is too low
Vehicle swithm anual transmission
! Onl
yengag egearw hent he clutch peda lis
depressed.
The engine is started automaticall ywheny ou
depress the clutch pedal.
Vehicle switha utomatic transmission
The engine is started automaticall yif:
R yous witch to drive program S+(all vehicles
except Mercedes-AM Gvehicles)
R yous witch to drive program RACE
(S‑MO DEL),S+orS(Mercedes-AMG vehicles)
R youp ermanentl yactivate manua lgears hifting
(Y page 163 )(Me rcedes-AMG vehicles)
R in transmission position Dor N,t he brake
peda lisrelease dand the HOLD functio nisn ot
active
R yous hift fro mtransmission position P
Shiftin gthe transmission to position Pdoes not
start the engine.
If yo ushift the transmission from Rto D,t he
ECO start/sto pfunctio nisa vailable againonce
the è ECO symbo lreappears in green in the
multifunctio ndisplay. 150
DrivingDriving an
dparking

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

Display messages
Possible causes/consequences and
M
MSolutions ?
Coolan
tStopv ehi‐
Coolan tStopv ehi‐
cle Switch engine cle Switch engine
off off The coolan
tistoohot.
Aw arning tone also sounds.
G WARNING
Never drive wit hanoverheate dengine. Drivin gwhen your engin eis
overheate dcan caus esom efluid swhichm ay hav eleaked int othe
engin ecom partmen ttocatch fire.
In addition ,steam from an overheate denginec an caus eserious
burns, whic hcan occur jus tbyopening th ebonnet.
There is ariskofi njury.
X Stop th evehicl eimmediately, payin gattention to roa dand traffic
conditions, and switch off th eengine.
X Safeguar dthe vehicl eagainst rollin gaway (Y page 172).
X Wait until th eengineh as cooled down.
X Mak esuret hatthe air supply to th eenginer adiato risnotblocked,
e.g. by frozen slush.
X Do no tstart th eenginea gain until th edisplay message goe sout and
th ec oolan ttem perature is belo w120†. The engin emay otherwise
be damaged.
X Pay attention to th ecoolan ttem perature display.
If th etemperatur eincreases again:
X Consult aqualified specialist workshop immediately.
Under normal operating condition sand wit hthe specified coolant
level, th ecoolan ttem perature may ris eto1 20 †. #
See Owner'
sManual
See Owner' sManual The battery is no
tbein gcharged.
Aw arning tone also sounds.
Possibl ecauses:
R fault yalternator
R torn poly-V-belt
R am alfunction in th eelectronics
! Do no
tcontinue driving. The engin ecould otherwise overheat.
X Stop th evehicl eimmediately, payin gattention to roa dand traffic
conditions, and switch off th eengine.
X Safeguar dthe vehicl eagainst rollin gaway (Y page 172).
X Consult aqualified specialist workshop. Display
messages
267On-boardcomputer an ddisplays Z

Display messages
Possible causes/consequences and
M
MSolutions Clutch overheated
Clutch overheated
Avoid pullin
gaway
Avoid pullin gaway
Engage/disengage Engage/disengage
clutch quickl yif
clutch quickl yif
req. req. The clutch is under considerable load and th
epermitte doperating
temperature has been exceeded .Awarning tone also sounds.
Avoid frequen tpullin gaway and drivin gatwalking pac eoverlonger
distances.
X Pull ove rand stop th evehicl esafely as soo naspossible, paying
attention to roa dand traffic conditions.
X Safeguar dthe vehicl eagainst rollin gaway (Y page 172).
X Leav ethe engin erunning.
The clutch is cooled mor equickl ywitht he engin erunning.
or
X If possible, continu edrivin gatas teady speed.
X Remove your foo tfro mt heclutch pedal and do no tallow th eclutch
to slip.
The clutch may also cool down during th ejou rney.
It may tak eseveral minute sfor it to cool down .Whent he clutch has
cooled down ,the display message disappears. The clutch is fully
operational again. N The boot lid is open.
X Clos ethe boot lid. M The bonne
tisopen.Aw arning tone also sounds.
G WARNING
The open bonne tmay then bloc kyour vie wwhen th evehicl eisin
motion.
There is ariskofana ccident.
X Pull ove rand stop th evehicl esafely as soo naspossible, paying
attention to roa dand traffic conditions.
X Safeguar dthe vehicl eagainst rollin gaway (Y page 172).
X Clos ethe bonnet. Active bonnet mal‐ Active bonnet mal‐
function See Own‐ function See Own‐
er'
sM anual
er' sM anual The active bonne
t(pedestrian protection )isnotactive due to amal-
function or because it has already been triggered.
X Consult aqualified specialist workshop. C At least on
edoor is open .Awarning tone also sounds.
X Clos eall doors. _
Front lef
tseat
Front lef tseat
backrest backrest not
notlocked
locked
or Front right seat
Front right seat
backrest not locked
backrest not locked The driver's or front-passenger seat backrest is no
tengaged. Awarn-
ing tone also sounds.
X Push th ebackrest bac kuntil it engages. Display
messages
281On-boardcomputer an ddisplays Z

Warning/
indicator
lamp
N N
Signal type
Possiblec auses/consequences and M
M Solutions ?
N
The red coolant warning lamp comes on while the engine is running.
The coolant leve listoo low.
If the coolant leve liscorrect, the airflow to the engine radiator may be blocked or
the electric engine radiator fan may be malfunctioning.
The coolant is too hot and the engine is no longer being coole dsufficiently.
X Observe the additiona ldisplay messages in the multifunction display.
X Stop the vehicl eimmediately, paying attention to road and traffic conditions,
and switch off the engine.
X Safeguard the vehicl eagainst rolling away( Ypage1 72).
X Leave the vehicl eand keep asafe distance from the vehicl euntil the engine has
coole ddown.
X Check the coolant leve land top up the coolant, observing the warning notes
(Y page3 24).
X If you have to top up the coolant frequently, have the engine cooling system
checked.
X Make sure that the air supply to the engine radiator is not blocked ,e.g. by frozen
slush.
X Do not start the engine again until the coolant temperature is below 120 †. The
engine may otherwise be damaged.
X Drive to the neares tqualified specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. driving in mountainous terrain
and stop-start traffic. ?
N
The red coolant warning lamp comes on while the engine is running. Awarning
tone alsos ounds.
The coolant temperature has exceede d120 †. The airflow to the engine radiator
may be blocked or the coolant leve lmay be too low.
G WARNING
The engine is not being coole dsufficiently and may be damaged.
Never drive with an overheated engine. Driving when youre ngine is overheated
can caus esome fluids which may have leaked into the engine compartment to
catch fire.
In addition, steam from an overheated engine can caus eserious burns, which can
occur just by opening the bonnet.
There is arisk of injury.
X Observe the additiona ldisplay messages in the multifunction display.
X Stop the vehicl eimmediately, paying attention to road and traffic conditions,
and switch off the engine.
X Safeguard the vehicl eagainst rolling away( Ypage1 72).
X Leave the vehicl eand keep asafe distance from the vehicl euntil the engine has
coole ddown.
X Check the coolant leve land top up the coolant, observing the warning notes
(Y page3 24).
X If you have to top up the coolant frequently, have the engine cooling system
checked. 292
Warning and indicator lamps in the instrument clusterOn-board computer and displays

Engine compartment
Bonnet
Important safety notes G
WARNING
An unlocked bonnet may open up when the
vehicle is in motion and bloc kyour view. There
is ar isk of an accident.
Never unlock th ebonnet when driving .Before
ever ytrip, ensure that th ebonnet is locked. G
WARNING
When bein gopened and closed, th ebonnet
may suddenly fall int othe closed position.
Ther eisar isk of injury to person sintherange
of movemen tofthebonnet.
Open and close th ebonnet only when nobody
is in th erange of movement. G
WARNING
If you open th ebonnet while th eengine is
overheatin gorwhile there is afireint he
engine compartment, you coul dcom einto
contac twith hot gases or other leaking ser-
vic ep roducts. Ther eisadanger of injury.
Allo wano verheatin gengine to coo ldown
before opening th ebonnet .Ifthere is afirein
th ee ngine compartment, leave th ebonnet
closed and notif ythe fireb rigade. G
WARNING
Ther eare moving component sintheengine
compartment. Certain component smay con-
tinue to mov eorsuddenly mov eagain even
after th eignition has been switched off ,e.g.
th er adiator fan .Ther eisar isk of injury.
If you have to carry out work in th eengine
compartment:
R switch off th eignition
R never touch th edangerous areas surround-
ing moving components, e.g .the rotation
area of th efan R
remove jeweller yand watches
R keep items of clothing and hair, for exam-
ple, away from moving parts. G
WARNING
The ignition system and th efuel injection sys-
te mo perate with ahigh voltage. If you touch
th el ive components, you coul dreceive an
electric shock. Ther eisadanger of injury.
Never touch component softheignition sys-
te mort hefuel injection system when the
ignition is switched on.
Activ ebonnet (pedestria nprotection) Operating principle
! An active bonnet that had been triggered
must be repaired at aqualified specialist
workshop .The active bonnet function will
then be availabl eagain .The additional pedes-
trian protection provide dbytheactive bonnet
will then be restored.
The active bonnet is only availabl eincertain
countries.
The active bonnet can reduc ethe risk of injury to
pedestrians in certain acciden tsituations .Rais-
ing th eactive bonnet increases th eclearance to
hard components, suc hastheengine.
If th eactive bonnet has been triggered, it is
raise datt herear in th earea aroun dthe hinge by
approximately 85 mm .The active bonnet is trig-
gered by pyrotechnics.
For th edrivetot heworkshop ,reset th etrig-
gered active bonnet yourself. If th eactive bon-
net has been triggered, pedestrian protection
may be limited.
Resetting G
WARNING
Certain component sintheengine compart-
men tcoul dbev eryh ot,e .g.t he engine ,the
radiator and part softheexhaust system.
Ther eisar isk of injury when accessing the
engine compartment.
As far as possible, allow th eengine to cool
down and only touch th ecomponent sdescri-
bed in th efollowing. Engine compartment
321Maintenance and care Z

X
With your hand flat, push down active bon-
net :in the area around the hinges on both
sides (arrows) until you feel it engage.
If you can raise the active bonnet slightly in the
area around the hinges, it is not engaged cor-
rectly. Repeat the step.
Opening the bonnet G
WARNING
Certain componentsint he engine compart-
ment could be very hot, e.g. the engine, the
radiator and parts of the exhaust system.
There is arisk of injury when accessin gthe
engine compartment.
As far as possible, allow the engine to cool
down and only touch the componentsd escri-
bed in the following. G
WARNING
When the bonnet is open, and the windscreen wipers are set in motion ,you can be injured by
the wiper linkage. There is arisk of injury.
Always switch off the windscreen wipers and
the ignition before opening the bonnet.
! Make sure that the windscreen wipers are
not folded away from the windscreen .Other-
wise, you could damage the windscreen wip-
ers or the bonnet. X
Make sure that the windscreen wipers are
switched off.
X Pull release lever :on the bonnet.
The bonnet is released. X
Reach into the gap, pull bonnet catc hhan-
dle ;up and lift the bonnet.
If you lift the bonnet by approximately 40 cm, the bonnet is opened and held open automat-
ically by the gas-filled strut.
Closing the bonnet X
Lower the bonnet and let it fall from aheight
of approximately 20 cm.
X Check that the bonnet has engaged properly.
If the bonnet can be raised slightly, it is not
properly engaged. Open it again and close it
with alittle more force. Radiator
Do not cover up the radiator. Do not use thermal mats, insect protection covers or anything sim-
ilar. Doing so can cause the Onboard Diagnos-
tics System to display inaccurat evalues. Some
of these values are legally required and must
alway sbec orrect. 322
Engine compartmentMaintenance and care

of the reach of children. Immediately rinse off
battery acid thoroughly with plenty of clean
water and seek medical attention at once. G
WARNING
Ad ischarged battery can freeze at tempera-
tures below freezin gpoint. When jump-start-
ing the vehicle or charging the battery, gases can escape from the battery. There is arisk of
an explosion.
Allow the frozen battery to thaw out before
charging it or jump-starting.
! Only use battery chargers with
amaximum
charging voltage of 14.8 V.
All vehicles:
! Only charge the battery using the jump-start
connection point.
The jump-starting connection point is in the
engine compartment (Y page 345).
X Open the bonnet.
X Connect the battery charger to the positive
terminal and earth point in the same order as
when connectingt he donor battery in the
jump-starting procedure (Y page 345).
Keep away from fire and naked flames. Do not
lean over the battery. Never charge the battery
if it is still fitted to the vehicle, unless you use a battery charger which has been tested and
approved by Mercedes-Benz. Abattery charger
unit specially adapted for Mercedes-Benz vehi-
cles and tested and approved by Mercedes-
Benz is available as an accessory. This device
permits charging of the battery in position. Con-
tact aMercedes-Benz Service Centre for infor-
mation and availability. Read the battery charg-
er's operating instructions before charging the
battery.
All vehicles except vehicles with alithium-
ion battery: if the indicator/warning lamps in
the instrument cluster do not light up at low
temperatures, it is very likely that the dis-
charged battery has frozen .Inthis case you may
neither jump-start the vehicle nor charge the
battery. The service life of abattery that has
been thawed may be reduced. The starting char-
acteristics may be impaired, especially at low
temperatures. Have the thawed battery
checked at aqualified specialist workshop. Vehicles with
alithium-ion battery: at low
temperatures, do not charge abattery which has
been removed using abattery charger. Allow the
battery to warm up gently first, if necessary.
Otherwise, the service life can be shortened and the starting characteristics impaired, especially
at low temperatures. 344
Battery (vehicle)Breakdown assistance