2015 MERCEDES-BENZ C-CLASS COUPE engine

Problems with the 230
Vpower socket Problem
Possible causes/consequences and
M
MSolutions The warning lamp on the
230 Vpower socket is
not lit. The on-board voltage is too low because the battery is too weak.
X Start the engine.
or X Charge the battery (Y page 343).
If the indicator lamp still does not light up: X Consult aqualified specialist workshop. The temperature of the DC/AC converter is temporarily too high.
X Remove the electronic device connector from the 230 Vsocket.
X Let the DC/AC converter cool down.
If the indicator lamp still does not light up after the converter cools
down:
X Consult aqualified specialist workshop. You have connected an electronic device that has
aconstant nominal
power of less than 150 watts, but has avery high switch-on current.
This device will not work. If you connect such adevice, the 230 V
power socket will not supply it with power.
X Connect asuitable electronic device. Mercedes-Benz emergency call sys-
tem
Information on these requirements can be found in the separate multimedia system operating
instructions. X
To open: press cover :for at least one sec-
ond.
X To make an emergency call: press SOS but-
ton ;briefly.
The indicator lamp in SOS button ;flashes
until the emergency call is concluded. X
Wait for avoice connection to the Mercedes-
Benz emergency call centre.
X After the emergency call, close cover :.
You will see amessage if:
R ac onnection to the Mercedes-Benz emer-
gency call centre cannot be made
R ac all has not been automatically forwarded
to the public emergency call centre
In this case, dial the 112emergency number
on your mobile phone.
You can find more information on the Mercedes- Benz emergency call system in the separate
multimedia system operating instructions. Mercedes-Benz Contact
General notes Mercedes-Benz Contact offers fast assistance
at the touch of
abutton –around the clock. For
any queries about the vehicle, Mercedes-Benz
Contact offers afast and easy connecting call to
the Mercedes-Benz Customer Centre. You can, 318
FeaturesStowing and features

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

Engine oil
Important safety notes 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. G
WARNING
If engine oil comes int ocontac twith hot com-
ponent sintheengine compartment, it may
ignite .Ther eisar isk of fir eand injury.
Mak esure that engine oil does no tspill out
ove rthe fille rneck. Allo wthe engine to cool
down and thoroughly clean th ecomponents
that have com eintoc ontac twith engine oil
before you start th eengine.
General notes Dependin
gonyour driving style, th evehicle
consume supto0.8litres of oil per 1,000 km.
The oil consumptio nmay be higher than this
when th evehicle is new or if you frequently drive
at high engine speeds.
Dependin gontheengine ,the oil dipstick may be
installed at adifferen tlocation.
When checking th eoil level:
R park th evehicle on aleve lsurface
R thee ngine shoul dbeswitched off for approx-
imately fiv eminute siftheengine is at normal
operatin gtem perature
R all vehicle s(excep tMercedes-AM GC63/C
63S): if th eengine is no tatnormaloperating
temperature, e.g .iftheengine was only star-
te db riefly, wait approximately 30 minutes
before carryin gout th emeasurement
The oil leve loftheMercedes-AM GC63/C6 3S
must be checked only when th eengine is at
normal operatin gtem perature. Checking th
eoil level usin gthe oil dip-
stick Example
X Pull oil dipstick :out of th eoil dipstick tube.
X Wipe off oil dipstick :.
X Slowly slide dipstick :intothe guide tub eto
th es top, and tak eitout again after approx-
imately 3seconds.
If th eleve lisb etween MIN mark =and MAX
mark ;,theoil leve liscorrect.
X If th eoil leve lhas dropped to MIN mark =or
below, to pupwith 1.0lof engine oil.
Toppin gupengine oil H
Environmental note
When toppin guptheoil, tak ecaren otto spill
any. If oil enters th esoil or waterways, it is
harmful to th eenvironment.
! Only use engine oils and oil filters that have
been approved for vehicle swithaservic esys-
tem. You can obtain alist of th eengine oils
and oil filters tested and approved in accord- anc ewith th eMercedes-Ben zSpecifications
for Servic eProduct satany Mercedes-Benz
Servic eCentre.
Damage to th eengine or exhaust system is
caused by th efollowing:
R usin gengine oils and oil filters that have not
been specifically approved for th eservice
system
R changing th eengine oil and oil filter after
missing th echang einterval required by the
servic esystem
R usin gengine oil additives
! Do no
tadd to omucho il. Topping up with too
muc hengine oil can result in damag etothe Engine compartment
323Maintenance and care Z

engine or to the catalytic converter. Have
exces
sengine oil siphoned off. Example
X Turn cap :anti-clockwise and remove it.
X Top up the engine oil.
If the oil level is at or below the MIN mark on
the oil dipstick ,top up with 1.0 lofe ngine oil.
X Replace cap :on the filler neck and turn
clockwise.
Make sure that the cap locks securely into
place.
X Check the oil leve lagain with the oil dipstick
(Y pag e323).
For further information on engine oil ,see
(Y pag e375). Other service products
Important safety notes G
WARNING
Certain components in the engine compart-
ment coul dbevery hot, e.g. the engine, the
radiator and parts of the exhaust system.
There is arisk of injury when accessing the
engine compartment.
As far as possible ,allow the engine to cool
dow nand only touch the components descri-
bed in the following. G
WARNING
The cooling system is pressurised, particu-
larl yw hen the engine is warm. If you open the
cap, you coul dbescalded if hot coolant
sprays out. There is arisk of injury. Let the engine cool dow
nbefore you open the
cap. Wea rglove sand eye protection. Open
the cap slowly to release the pressure. G
WARNING
If windscreen washer concentrate comes into contact with hot components of the engine or
the exhaust system, it can ignite. There is a
risk of fire and injury.
Make sure the windscreen washer concen-
trate does not come into contact with the filler neck.
Checking the coolan tlevel X
Park the vehicl eonalevelsurface.
Only check the coolant leve lifthe vehicl eis
on aleve lsurface and the engine has cooled
down.
X Turn the key to position 2in the ignition lock
(Y pag e145).
or
X On vehicles with KEYLESS-GO, press the
Start/Stop button twice (Y page145).
X Check the coolant temperature display in the
instrument cluster (Y page233).
The coolant temperature must be below
70 †.
X Turn the key to position 0(Y pag e145).
or
X On vehicles with KEYLESS-GO, pul lthe Start/
Stop button from the ignition lock
(Y pag e145).
X Slowl yturn cap :halfat urn anti-clockwise
to allow excess pressure to escape. 324
Engine compartmentMaintenance and care

X
Turn cap :further anti-clockwise and
remove it.
If the coolant is at the level of marker bar =
in the filler neck when cold, there is enough
coolant in coolant expansion tank ;.
If the coolant level is approximately 1.5 cm
above marker bar =in the filler neck when
warm, there is enough coolant in coolant
expansion tank ;.
X If necessary, top up with coolant that has
been tested and approved by Mercedes-Benz.
X Replace cap :and turn it clockwise as far as
it will go.
Further information on coolant (Y page 376).
Topping up the windscreen washer sys- tem X
To open: pull cap:upwards by the tab and
open.
X Top up with the premixed washer fluid.
X To close: press cap :ontot he filler neck
until it engages.
If the washer fluid level drops below the recom- mended minimum of 1litre, amessage appears
in the multifunction display promptin gyou to
top up the washer fluid (Y page 283).
Further information on windscreen washer
fluid/antifreez e(Ypage 377). ASSYST PLUS
Service message
The ASSYST PLUS service interval display
inform syou of the next service due date.
Information on the type of service and service
intervals (see the separate Servic eBooklet). You can obtain further information from a
Mercedes-Benz Servic
eCentre.
i The ASSYST PLUS service interval display
does not show any information on the engine oil level. Observe the notes on the engine oil
level (Y page 323).
The multifunction display shows aservice mes-
sage for afew seconds, e.g.:
R Service AinXXd ays
Service AinXXd ays
R Service Adue
Service Adue
R Service Aoverdue by XX days
Service Aoverdue by XX days
Dependin gonthe operating conditions of the
vehicle, the remaining time or distance until the
next service due date is displayed.
The letter indicates which service is due. A A
stands for aminor service and B
Bfor am ajor ser-
vice. Anumber or another letter may be dis-
played after the letter.
Only for certain countries: the position after the
letter A
A or B Bindicates any necessary additional
maintenance work. If you notify aqualified spe-
cialist workshop of this display ,you will receive
as tatement on the associated costs.
The ASSYST PLUS service interval display does
not take into account any periods of time during which the battery is disconnected.
Maintaining the time-dependent service sched-
ule:
X Note down the service due date displayed in
the multifunction display before disconnect-
ing the battery.
or
X After reconnecting the battery, subtract the
battery disconnection periods from the ser-
vice date shown on the display. Hiding service messages
X Press the aor% button on the steering
wheel. Displaying service messages
X Switch the ignition on.
X Use ò on the steerin gwheel to call up the
list of menus. ASSYST PLUS
325Maintenance and care Z

X
Press 9or: on the steerin gwheel to
select the Service
Servicemenu and confirm with
a.
X Press 9or: on the steerin gwheel to
select the ASSYST PLUS
ASSYST PLUS submenu and con-
firm with a.
The service due date appears in the multi-
function display. Information about service
Resetting the ASSYST PLUS service
interva ldisplay !
If the ASSYST PLUS service interval display
has been inadvertently reset, this setting can
be corrected at aqualified specialist work-
shop.
Have service work carried out as described in the Servic eBooklet .This may otherwise lead
to increased wear and damage to the major
assemblies or the vehicle.
Aq ualified specialist workshop, e.g. a
Mercedes-Benz Servic eCentre, will reset the
ASSYST PLUS service interval display after the
service work has been carried out. You can also
obtain further information on maintenance
work, for example.
Special service requirements The prescribed service interval is based on nor-
mal operation of the vehicle. Servic ework will
need to be performed more often if the vehicle is
operated under arduous conditions or increased loads, for example:
R regular city driving with frequent intermediate
stops
R if the vehicle is primarily used to travel short
distances
R for frequent operation in mountainous terrain
or on poor road surfaces
R if the engine is often left idling for long periods
In these or similar operating conditions, have,
for example, the air filter, engine oil and oil filter changed more frequently. The tyres must be
checked more frequently if the vehicle is oper-
ated under increased loads. Further informationcan be obtained at aqualified specialist work-
shop, e.g. aMercedes-Benz Servic eCentre. Driving abroad An extensive Mercedes-Benz Servic
enetwor kis
also availabl einother countries. You can obtain
further information from any Mercedes-Benz
Servic eCentre. Care
General notes
H
Environmenta
lnote
Dispose of empty packaging and cleaning
cloths in an environmentally responsible man-
ner.
! For cleaning your vehicle, do not use any of
the following:
R dry, rough or hard cloths
R abrasive cleaning agents
R solvents
R cleaning agents containing solvents
Do not scrub.
Do not touch the surfaces or protective films
with hard objects, e.g. aring or ice scraper.
You could otherwise scratch or damage the
surfaces and protective film.
! Do not park up the vehicle for an extended
period straight after cleaning it, particularly
after having cleaned the wheels with wheel
cleaner. Wheel cleaners could cause
increased corrosion of the brake discs and
brake pads/linings. For this reason, you
should drive for afew minutes after cleaning.
Brakin gheats the brake discs and the brake
pads/linings, thus drying them. The vehicle
can then be parked up.
Regula rcare of your vehicle is acondition for
retainin gthe quality in the long term.
Use care products and cleaning agents recom-
mended and approved by Mercedes-Benz. 326
CareMaintenance and care

Washing the vehiclea
nd cleaning the
paintwork
Automatic car wash G
WARNING
Braking efficiency is reduced after the vehicle has been washed .There is arisk of an acci-
dent.
After washing the vehicle, brake carefully
while paying attention to the traffic conditions in order to restore full braking efficiency.
! When DISTRONIC PLUS or the HOLD func-
tion is activated, the vehicl ebrakes automat-
ically in certain situations.
To avoi ddamage to the vehicle, deactivate
DISTRONIC PLUS and the HOLD function in
the following or similar situations:
R when towing away
R in ac ar wash
! Make sure:
R the side windows and sliding sunroo fare
close dcompletely.
R the blower for the ventilation/heating is
switched off (OFF button is depressed).
R the windscreen wiper switch is at position
0
R the 360° camera or reversing camera is
switched off.
The vehicl ecouldo therwise be damaged.
! If the key is withi
nthe rear detection range
of KEYLESS-GO, the following situations, for
example, coul dleadtot he boot lid opening
unintentionally:
R using acar wash
R using ahigh-pressure cleaner
Make sure that the key is at least 3maway
from the vehicle.
! Make sure that the automatic transmission
is in neutral position Nwhen washing your
vehicl einat ow-through car wash. The vehicle
may otherwise be damaged.
R Operating with the key:
Do not remove the key from the ignition
lock. Do not open the driver's door when
the engine is switched off or at very low
speeds. Otherwise, whe nintransmission position
Dor Rthe automatic transmission
wil lautomatically switch to park position P
and block the wheels.
R Operating with the Start/Stop button:
Do not open the driver's door whe nthe
engine is switched off or at very low
speeds. Otherwise, whe nintransmission
position Dor Rthe automatic transmission
wil lautomatically switch to park position P
and block the wheels.
Observe the following to make sure that the
automatic transmission stay sinneutral position
N:
Operating with the key and Start/Stop button:
X Make sure the ignition is switched on.
X Make sure that the vehicl eisstationary.
X Depress the brake peda land keep it
depressed.
Operating with the Start/Stop button only: X Engage park position P.
X Releas ethe brake pedal.
X Remove the Start/Stop button from the igni-
tion lock (Y page145).
X Insert the key into the ignition lock.
X Switch on the ignition.
X Depress the brake peda land keep it
depressed.
Operating with the key and Start/Stop button:
X Select neutral N.
X Releas ethe brake pedal.
X Releas ethe electric parking brake, if neces-
sary.
X Switch off the ignition and leave the key in the
ignition lock.
You can wash the vehicl einanautomatic car
wash from the very start.
Was hoff excess dirt before cleaning the vehicle
in an automatic car wash.
After using an automatic car wash, wip eoff wax
from the windscreen and the wiper blades. This
wil lprevent smears and reduce wiping noises
caused by residue on the windscreen.
Washing by hand In some countries
,washing by hand is only
allowe datspeciall yequipped washing bays. Care
327Maintenance and care Z