2015 MERCEDES-BENZ C-CLASS COUPE fuel

Display messages
Possible causes/consequences and
M
MSolutions j
Check Check
trailer
trailer hitch
hitch
lock
lock The trailer to
whitch is no tcorrectly engaged.
Aw arning tone also sounds.
G WARNING
If th eball couplin gisnotengaged, th etrailer may come loose. There
is ar iskofana ccident.
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 Engage th etrailer coupling's ball couplin gintheendp osition
(Y page 228). &
Function available Function available
again after engine again after engine
start start Vehicles wit
hthe BlueEFFICIENCY package:
Wit hthe engin eswitched off ,you hav eattempte dtoswitch on remote
activation of heating and ventilation systems mor ethant hree times.
X Let th eenginer un for te nseconds.
Afte rrunnin gthe engine, th epre-entry climat econtro lisopera-
tional again. &
inoperative inoperative
Battery
Battery
low
low th
eo n-bo ardv oltag eistoolow.
The auxiliary heating (Y page 138) has switched itself off .The auxiliary
heating or remot eactivation of heating and ventilation systems can-
no tbes witched on.
X Drive for aconsid erable distance.
The battery charges. The auxiliary heating or remot eactivation of
heating and ventilation systems is operational again as soo nasthe
on-boar delectrical system voltag eissufficient. &
inoperative Refuel inoperative Refuel
vehicle vehicle There is to
olittl efuel in th efuel tank. The auxiliary heating canno tbe
switched on (Y page 138).
X Refue lattheneares tfilling station. &
inoperative inoperative
See
SeeOwn‐
Own‐
er' sM an.
er' sM an. The auxiliary heating is temporarily malfunctioning or faulty.
X Whe nthe vehicl eisonal evel surfac eand th eengineh as cooled
down ,makeuptof oura ttempts to switch on th eauxiliary heating,
waiting several minute sbetween eac hattemp t(Y page 138).
If th eauxiliary heating does no tswitch on:
X Consult aqualified specialist workshop. 282
Display
messagesOn-boardcomputer an ddisplays

Warning/
indicator
lamp
N N
Signal type
Possiblec auses/consequences and M
M Solutions !
N
The red indicator lamp for the electric parking brake flashes or is lit and/or the
yellow warning lamp for the electric parking brake is lit.
X Observe the additiona ldisplay messages in the multifunction display. 6
N
The red restraint system warning lamp is lit while the engine is running.
The restraint system is faulty.
G WARNING
The airbags or beltt ensioners may either be triggere dunintentionally or, in the
event of an accident, may not be triggered.
This poses an increased risk of injury.
X Observe the additiona ldisplay messages in the multifunction display.
X Drive on carefully.
X Contact aqualified specialist worksho pimmediatel yand have the restraint sys-
tem checked.
For further information about the restraint system, see (Y page39). Engine
Warning/
indicator
lamp
N N
Signal type
Possiblec auses/consequences and M
M Solutions ;
N
The yellow engine diagnostics warning lamp lights up while the engine is run-
ning.
There may be afault, for example:
R in the engine management
R in the fuel injection system
R in the exhaust system
R in the ignitio nsystem (for vehicles with petrol engines)
R in the fuel system
The emission limi tvalues may be exceede dand the engine may be running in
emergency mode.
X Consult aqualified specialist worksho pimmediately.
Vehicles with adiesel engine: the fuel tank has been run dry (Y page169).
X Start the engine three to four times after refuelling.
If the yellow engine diagnostics warning lamp goes out, emergency running
mode is cancelled. The vehicl eneed not be checked. 8
N
The yellow reserve fuel warning lamp is on while the engine is running.
The fuel leve lhas dropped into the reserve range.
Operation of the auxiliary heating is deactivated if the fuel leve ldrops into the
reserve range.
X Refuel at the neares tfilling station. 290
Warning and indicator lamps in the instrument clusterOn-board computer and displays

Settings in the bottom bar of the cli-
matec ontrol menu Activating/deactivating cooling with air
dehumidification
X Call up the climate control menu
(Y page 300).
X Slide 6the controller repeatedly until the
bottom bar is activated.
X To select O
O A/C
A/C:t urn and press the control-
ler.
X Switch cooling with air dehumidification on
O or off ª.
i The current status of the cooling function is
displayed in the climate control bar: A/C ON
–a ctivated, A/C OFF –deactivated.
i Deactivating the cooling with air dehumidi-
fication function reduces fuel consumption.
Synchronising the climate control set-
tings Use O
O Sync. Sync. (synchronisation )toselect the
climate control settingf or all zones togetherO
or separately ª.
X Call up the climate control menu
(Y page 300).
X Slide 6the controller repeatedly until the
bottom bar is activated.
X To select O
O Sync. Sync.:t urn and press the con-
troller.
X Switch the synchronisation function on Oor
off ª.
For further information on synchronising cli-
mate control settings, see (Y page 133).Navigation mode
Important safety notes G
WARNING
Operating the integrated information systems and communications equipment in the vehicle
while driving will distract you from traffic con-
ditions. You could then lose control of the
vehicle. There is arisk of an accident.
Only operate these devices if road traffic con-
ditions permit. If you are unsure about the surrounding conditions, pull over to
asafe
location and make entries only while the vehi- cle is stationary.
You must observe the legal requirements for the countryinw hich you are currently driving when
operating the navigation system.
General notes Correct functioning of the navigation system
depends, amongst other things, on GPS recep-
tion. In certain situations, GPS reception may be
impaired, there may be interference or there
may be no reception at all, e.g. in tunnels or
multi-storey car parks.
Audio 20 is equippedw ith Garmin®
MAP PILOT
(see the manufacturer's operating instructions).
The Garmin ®
MAP PILOT operating instructions
are stored on the SD memory card as aPDF file.
The SD card box contains aquick guide.
The following descriptions apply to navigation
with COMAND Online. Further information can
be found in the Digital Owner's Manual.
Selecting aroute type and route options Multimedia system:
X Select Navi NaviQNavigation Navigation.
The map displayst he current vehicle position.
X Slide 6the controller.
X Select Options
OptionsQRoute settings Route settings.
Notes for route types:
R Eco route
Eco route
R Dynamic route
Dynamic route
Traffic reports on the route for the route guid-
ance are taken into account.
R Calculate alternative routes Calculate alternative routes
Differen troutes are being calculated. Instead
of Start Start select the Continue Continue menu item.
Notes for route options:
R Use toll roads
Use toll roads
The route calculation includes roads which
require you to pay ausage fee (toll).
R Use vignette roads
Use vignette roads (not available in all
countries)
The route calculation includes roads which
require you to pay atime-based fee (vignette).
Av ignett eallowst emporary use of the route
network,e .g.10d ays or 1year. Operating system
301Multimedia system Z

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

Observe the legal requirements for each indi-
vidualc ountry.
X Do not use hot water and do not wash the
vehicle in direct sunlight.
X Use asoft sponge to clean.
X Use amild cleaning agent, such as acar
shampoo approved by Mercedes-Benz.
X Thoroughly hose down the vehicle with agen-
tle jet of water.
X Do not point the water jet directly towards the
air inlet.
X Use plenty of water and rinse out the sponge
frequently.
X Rinse the vehicle with clean water and dry
thoroughly with achamois.
X Do not let the cleaning agent dry on the paint-
work.
When using the vehicle in winter, remove all
traces of road salt deposits carefully and as
soon as possible.
High-pressure cleaning equipment G
WARNING
The water jet of circular-jet nozzles (dirt grind- ers) can cause damage not visible from the
outside to tyres or chassis components. Com-
ponents damaged in this way can unexpect-
edly fail. There is arisk of an accident.
Do not use high-pressure cleaners with circu-
lar-jet nozzles to clean the vehicle. Have dam- aged tyres or chassis componentsr eplaced
immediately.
! Alwaysm
aintainadistance of at least 30 cm
between the vehicle and the high-pressure
cleaner nozzle. Information aboutt he correct
distance is available from the equipment
manufacturer.
Move the high-pressure cleaner nozzle
around when cleaning your vehicle.
Do not aim directly at any of the following:
R tyres
R door gaps, roof gaps, joints etc.
R electrical components
R battery
R connectors
R lights
R seals R
trim elements
R ventilation slots
Damaged seals or electrical componentsc an
lead to leaks or failures.
! If the key is within the rear detection range
of KEYLESS-GO, the following situations, for
example, could lead to the 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.
! Edition
1special model: parts of your vehi-
cle are covered with adecorative foil. Main-
tain adistance of at least 70 cm between the
foil-wrappedp arts of the vehicle and the noz-
zle of the high pressure cleaner.
Information aboutt he correct distance is
available from the equipment manufacturer.
Move the high-pressure cleaner nozzle
around when cleaning your vehicle.
Cleaning the paintwork !
Do not affix:
R stickers
R films
R magnetic plates or similari tems
to painted surfaces. You could otherwise
damage the paintwork.
Scratches, corrosive deposits, areas affected by
corrosion and damage caused by inadequate
care cannot always be completely repaired. In
such cases, visit aqualified specialist workshop.
X Remove impurities immediately,w here pos-
sible, whilst avoiding rubbing too hard.
X Soak insect remains with insect remover and
rinse off the treated areas afterwards.
X Soak bird droppings with water and rinse off
the treated areas afterwards.
X Remove coolant, brake fluid, tree resins, oils,
fuels and greases by rubbing gently with a
cloth soaked in petroleum ether or lighter
fluid.
X Use tar remover to remove tar stains.
X Use silicone remover to remove wax. 328
CareMaintenance and care

G
WARNING
If the required tyre pressure is not reached
after driving for ashort period, the tyre is too
badly damaged. The tyre sealant cannot
repair the tyre in this instance. Damaged tyres and atyre pressure that is too low can signif-
icantly impair the vehicle's braking and driv-
ing characteristics. There is arisk of accident.
Do not continue driving. Contact aqualified
specialist workshop.
i In yourv
ehicle, you willf indasticker with
the Mercedes-Benz Service24h telephone
number, e.g. on the B-pillar on the driver's
side.
X Correct the tyre pressure if it is still at least
130 kPa (1.3 bar/19 psi) .See the tyre pres-
sure table on the fuel filler flap for values.
X To increase the tyre pressure: switch on
the tyre inflation compressor. X
To reduce the tyre pressure: depress pres-
sure release button :next to pressure
gauge ;.
X When the tyre pressure is correct, unscrew
the filler hose from the valve of the sealed
tyre.
X Screw the valve cap onto the tyre valve of the
sealed tyre. X
To remove the tyre sealant bottle from the
tyre inflation compressor, press together the
locking tabs on the yellow cap.
X Pullt he tyre sealant bottle out of the tyre
inflation compressor.
The filler hose stays on the tyre sealant bottle.
X Drive to the neares tqualified specialist work-
shop and have the tyre changed there.
X Have the tyre sealant bottle and the filler hose
replaced as soon as possible at aqualified
specialist workshop.
X Have the tyre sealant bottle replaced every
four years at aqualified specialist workshop. Battery (vehicle)
12
Vb attery -important safety notes
Work on the battery ,e.g. removing or fitting,
requires specialist knowledge and the use of
special tools. Therefore, alwaysh ave work on
the battery carrie dout at aqualified specialist
workshop. G
WARNING
Work carrie dout incorrectly on the battery
can lead, for example, to ashort circui tand
thus damage the vehicl eelectronics. This can
leadtof unction restrictions applying to
safety-relevant systems ,e.g the lighting sys-
tem, the ABS (anti-lock braking system) or the
ESP ®
(Electronic Stability Program). The oper-
ating safety of yourv ehiclemay be restricted. Battery (vehicle)
341Breakdown assistance
Z

Jump-starting
For the jump-starting procedure, use only the jump-starting connection point, consisting of apos-
itive terminal and an earth point, in the engine compartment.
All vehiclese xcept vehiclesw ithalithium-ion battery: G
WARNING
Battery acid is caustic. There is arisk of injury.
Avoid contact with the skin, eyes or clothing. Do not breathe in any battery gases. Do not lean over the battery. Keep the batteries out of the reach of children. Immediately rinse off battery acid
thoroughly with plenty of clean water and seek medical attention at once. G
WARNING
During charging and jump-starting, explosive gases can escape from the battery. There is arisk
of an explosion.
Particularly avoid fire, naked flames, creating sparks and smoking. Ensure there is sufficient
ventilation while charging and jump-starting. Do not lean over abattery. G
WARNING
During the charging process, abattery produces hydrogen gas. If ashort circuit occurs or sparks
are created, the hydrogen gas can ignite. There is arisk of an explosion.
R Make sure that the positive terminal of aconnected battery does not come into contact with
vehicle parts.
R Never place metal objects or tools on abattery.
R It is important that you observe the described order of the battery terminals when connecting
and disconnecting abattery.
R When jump-starting, make sure that the battery poles with identical polarity are connected.
R It is particularly important to observe the described order when connecting and disconnecting
the jump leads.
R Never connect or disconnectt he battery terminals while the engine is running.G
WARNING
Ad ischarged battery can freeze at temperatures below freezing point. When jump-starting 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.
If the indicator/warning lamps do not light up at low temperatures, it is very likely that the dis-
charged battery has frozen.Int his 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 charac-
teristics may be impaired, especially at low temperatures. Have the thawed battery checked at a
qualified specialist workshop.
All vehicles:
! Vehicles with
apetrol engine: avoid repeated and lengthy starting attempts.O therwise, the
non-combusted fuel may damage the catalytic converter. Jump-starting
345Breakdown assistance Z

Important safety notes
G
WARNING
If wheels and tyres of th ewrong siz eare used,
th ew hee lbrakes or suspension components
may be damaged. Ther eisariskofana cci-
dent.
Always replace wheels and tyres wit hthose
that fulfil th especification softheoriginal
part.
When replacing wheels, mak esuretof it the
correct:
R designation
R type
When replacing tyres, mak esuretof it the
correct:
R designation
R manufacturer
R type G
WARNING
Af lat tyr eseverely impairs th edriving ,steer-
ing and braking characteristics of th evehicle.
Ther eisar iskofa ccident.
Tyre swithout run-flat characteristics:
R do no tdrivew ithaf lat tyre.
R immediately replace th eflat tyr ewithy our
emergenc yspar ew hee lors parew heel, or
consult aqualified specialist workshop.
Tyre swithr un-flat characteristics:
R pay attention to th einformation and warn-
ing notice sonMOExtended tyres (tyres
wit hrun-flat characteristics).
Accessories that are no tapprove dfor your vehi-
cle by Mercedes-Ben zorare notbein gused cor-
rectl ycan impair th eoperating safety.
Before purchasing and usin gnon-ap proved
accessories, visit aqualified specialist work-
sho pand enquir eabout:
R suitability
R legal stipulations
R factory recommendations Further information regarding wheels and tyres
can be foun
dunder "Wheel/tyre combinations"
(Y page 366).
You can ask for information regarding permitted
wheel-tyre combination sataMercedes-Benz
Service Centre.
Information on tyr epressur ecan be found:
R in th etyrep ressur etable in th efuel filler flap
(Y page 167)
R under "Tyre pressure" (Y page 356)
Modification wor konthebrak esystem and
wheels is no tpermitted. The use of spacers or
brak edust shields is no tpermitted. This inva-
lidates th egeneral operating permit for th evehi-
cle.
i Further information on wheels and tyres can
be obtained at any qualified specialist work-
shop. Operation
Information on driving
Chec kthe tyrep ressures when th evehicl eis
heavily laden and adjust prio rtoatrip.
While driving ,pay attention to vibrations, noises
and unusual handlin gcharacteristics ,e.g.p ull-
ing to on eside .This may indicat ethatthe
wheels or tyres are damaged. If you suspec tthat
at yreisd efective, reduce your spee dimmedi-
ately. Stop th evehicl eass oonasp ossible to
chec kthe wheels and tyres for damage. Hidden
tyr ed amag ecould also be causing th eunusual
handlin gcharacteristics .Ifyou fin dnos ignsof
damage, hav ethe tyres and wheels checke data
qualified specialist workshop.
When parking your vehicle, mak esuren otto
squas hthe tyres idewalls. If this canno tbeavoi-
ded, driv eslowly ove robstacles, e.g. kerbs ,and
only at an obtuse angle. You could otherwise
damag ethe whee lrim sa nd tyres. Notes on high performance tyres
G
WARNING
Due to th especial tyr etread in combination
wit hthe optimised rubber compound ,the re is
an increased ris kofaquaplaning and skidding
on adamp or wet road surface. Tyre gri pis
also noticeably reduce datlow outside tem- Operation
353Wheels and ty res
Z