2015 MERCEDES-BENZ C-CLASS COUPE coolant

Warning/
indicator
lamp
N N
Signal type
Possiblec auses/consequences and M
MSolutions ?
N
The red coolant warning lamp lights up while the engine is running and the
coolant temperature gauge is at the start of the scale.
The temperature sensor for the coolant temperature gauge is faulty.
The coolant temperature is no longer being monitored .There is arisk of engine
damage if the coolant temperature is too high.
X Stop the vehicl eimmediately, paying attention to road and traffic conditions,
and switch off the engine. Do not continue driving under any circumstances.
X Safeguard the vehicl eagainst rolling away( Ypage1 72).
X Consult aqualified specialist workshop. Warning and indicator lamps in the instrument cluster
291On-board computer and displays 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

Warning/
indicator
lamp
N N
Signal type
Possiblec auses/consequences and M
MSolutions X
Make sure that the air supply to the engine radiator is not blocked ,e.g. by frozen
slush.
X If the coolant temperature is below 120 †, you can continue driving 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. Driving systems
Warning/
indicator
lamp
N N
Signal type
Possiblec auses/consequences and M
MSolutions ·
N
The red distance warning lamp lights up while the vehicl eisinmotion.
The distance to the vehicl einfront is too smal lfor the spee dselected.
X Increase the distance. ·
N
The red distance warning lamp lights up while the vehicl eisinmotion.Awarning
tone alsos ounds.
You are approaching avehicle, apedestrian or astationary obstacl einyourline of
travel at too high aspeed.
X Be prepared to brake immediately.
X Pay carefu lattention to the traffic situation. You may have to brake or take
evasive action.
Further information on PRE ‑SAFE®
Brake (Y page75).
For further information on the distance warning function of COLLISION PREVEN-
TION ASSIST PLUS, see (Y page69). Warning and indicator lamps in the instrument cluster
293On-board computer and displays 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

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

Vehicl
eidentificatio nnumber (VIN) X
Slide the right-hand front sea ttoits rearmost
position.
X Fol dfloor covering ;upwards.
VIN :is visible.
The VIN can also be found on the vehicl eide n-
tification plate (Y page 370).
Onl yfor certain countries: the VIN can also be
found at the lowe redgeoft he windscreen. Engine number
The engine numbe risstampe dinto the crank-
case. Yo ucan obtai nfurther informatio nfrom
any qualified specialist workshop. Servic
eproducts and capacities Important safety notes
G
WARNING
Service product can be poisonou sand haz-
ardou stohealth.There is ariskofi njury.
Observe the instructions on the respective
original containe rwhenu sing ,storing and dis-
posing off service products. Alway sstor eser-
vice products in the seale doriginal container.
Alway skeeps ervice products ou tofthe reach
of children. H
Environmental note
Dispose of service products in an environ-
mentally-responsibl emanner. Service products includ
ethe following:
R Fuels
R Exhaus tgas aftertreatment additives, e.g.
AdBlue ®
R Lubricants (e.g. engine oil, transmission oil)
R Coolant
R Brake fluid
R Windscree nwashe rfluid
R Climate contro lsystem refrigerant
Components and service products must be
matched .Onlyu seproducts recommende dby
Mercedes-Benz. Damage which is caused by the us eofp roducts which have not been recom-
mended is not covered by the Mercedes-Benz
warranty or goodwil lgestures. The yare listed in
thi sM ercedes-Benz Owner' sManualint he
appropriate section.
Yo uc an identify service products approved by
Mercedes-Benz by the following inscriptions on
the container:
R MB-Freigab e(e.g. MB-Freigab e229.51)
R MB-Approval (e.g. MB-Approval 229.51)
Othe rdesig nations or recommendations indi-
cate alevel of quality or aspecification in
accordance with an MB Shee tNum ber(e.g. MB
229.5) .The yh aven ot necessaril ybeen
approved by Mercedes-Benz.
Othe ride ntifications, for example:
R 0W -30
R 5W -30
R 5W -40
Yo uc an obtai nfurther informatio natany quali-
fie ds pecialist workshop or on the Interne tat
http://bevo.mercedes-benz.co m. Fuel
Important safety notes G
WARNING
Fuel is highly flammable. If you handle fuel
incorrectly, there is ariskoff irea nd explo-
sion.
You must avoi dfire, naked flames, creating
sparks and smoking. Switc hoff th eengine
and ,ifa pplicable, th eauxiliary heating before
refuelling. Service products and capacities
371Technical data Z

Additives
!
Do no
tuse any additive switht he engin eoil.
This could damag ethe engine. Brak
efluid G
WARNING
The brak efluid continuously absorbs mois-
tur efromt heair. This result sintheboiling
poin toft hebrak efluid lowering .Iftheboiling
poin toft hebrak efluid is to olow, vapour
pockets may for mwhen th ebrakes are sub-
jected to aheav yload. This would impair brak-
ing efficiency. There is ariskofana ccident.
Hav ethe brak efluid renewed at th eprescri-
bed intervals.
When handlin gbrak efluid ,observ ethe impor-
tan tsafet ynotes on servic eproducts
(Y page 371).
The brak efluid chang eintervals can be foun din
th eS ervic eBooklet.
Only use brak efluid approve dbyMercedes-
Benz in accordanc ewithM B-Freig abe or MB-
Approval 331.0.
Information about approve dbrak efluid can be
obtained at any qualified specialis tworkshop or
on th eInterne tat
http://bevo.mercedes-benz.co m.
i Have the brake fluid regularly replaced at a
qualified specialist workshop in accordance
with the replacement intervals and the
replacement confirmed in the Service Book-
let. Coolant
Importan tsafety notes G
WARNING
If antifreeze comes into contact with hot com- ponents in the engine compartment, it may
ignite. There is arisk of fire and injury.
Let the engine cool dow nbefore yo utop up
the antifreeze .Make sur ethat antifreeze is
not spilled next to the filler neck. Thoroughly clea
nthe antifreeze from components before
starting the engine.
! Only ad
dcoolant that has bee npremixed
with the desire dantifreeze protection. You
coul dotherwise damag ethe engine.
Furthe rinformatio noncoolants can be found
in the Mercedes-Benz Specifications for Ser-
vice Products, MB Specifications for Service
Products 310.1, e.g. on the Internet at
http://bevo.mercedes-benz.com .Orcontact
aq ualifie dspecialist workshop.
! Always use
asuitabl ecoolant mixture, even
in countries where hig htemperatures prevail.
Otherwise ,the engine cooling system is not
sufficiently protected from corrosion and
overheating.
i Have the coolant regularly replaced at a
qualified specialist workshop and the replace- ment confirmed in the Service Booklet.
Comply with the important safety precautions
for service products whe nhandling coolant
(Y page 371).
The coolant is amixture of water and anti-
freeze/corrosion inhibitor. It is responsible for
the following:
R anti-corrosion protection
R antifreeze protection
R raising the boiling point
If antifreeze/corrosion inhibito rispresent in the
correct concentration, the boiling point of the
coolant during operation will be approximately
130 †.
The antifreeze concentrate/corrosion inhibitor
concentration in the engine cooling system
should:
R be at least 50%. Thi swillp rotect the engine
cooling system against freezing dow nto
approximatel y-37 †.
R not excee d55% (antifreeze protection down
to -45 †). Hea twillo therwise not be dissipa-
ted as effectively.
Mercedes-Benz recommends an antifreeze/
corrosion inhibito rconcentrate in accordance
with MB Specifications for Service Products
310.1.
i Whe
nthe vehicle is first delivered, it is filled
with acoolant mixtur ethat ensures adequate
antifreeze and corrosion protection. 376
Service products and capacitiesTechnical data