2018 MERCEDES-BENZ CLA COUPE coolant

Warning/
indicator
lampNSignal type
Possiblec auses/consequences and M
Solutions
?NThe red coolant warning lamp comes on while the engine is running.
The coolant levelist oo low.
If the coolant levelisc orrect, the airflow to the engine radiator may be blocked or
the electric engine radiator fan may be defective.
The coolant is too hot and the engine is no longer being cooleds ufficiently.
XObserve the additionaldisplay messages in the multifunction display.
XPullover and stop the vehicles afelyand switch off the engine, paying attention
to road and traffic conditions.
XSecure the vehiclea gainst rolling away(Ypage141).
XLeave the vehiclea nd keepasafe distance from the vehicleu ntil the engine has
cooledd own.
XCheck the coolant levela nd add coolant, observing the warning notes
(Ypage2 60).
XIf you have to add coolant frequently, have the engine cooling system checked.
XMake sure that the air supply to the engine radiator is not blocked,e .g. by snow,
slush or ice.
XDo not start the engine again until the coolant temperature is below 248 ‡
(120 †). Otherwise, the engine coul dbedamaged.
XDrive to the neares tqualified specialist workshop.
XAvoid heavy loads on the engine as you do so, e.g. driving in mountainous terrain
and stop-and-go traffic.
?NThe red coolant warning lamp comes on while the engine is running. Awarning
tone als osounds.
The coolant temperature has exceeded2 48‡(120 †). The airflow to the engine
radiator may be blocked or the coolant levelm ay be too low.
GWARNING
The engine is not being cooleds ufficiently and may be damaged.
Do not drive whe nyoure ngine is overheated. This can cause some fluids which
may have leaked into the engine compartment to catch fire.
Steam from the overheated engine can also cause serious burns which can occur
just by opening the hood.
There is arisk of injury.
XObserve the additiona ldisplaym essages in the multifunction display.
XPullover and stop the vehicle safely and switch off the engine, paying attention
to road and traffic conditions.
XSecure the vehicle against rolling away (Ypag e141).
XLeav ethe vehicle and keep asafe distance from the vehicle until the engine has
cooledd own.
XCheck the coolant levela nd add coolant, observing the warning notes
(Ypag e260).
XIf you have to add coolant frequently, have the engine cooling system checked.
XMake sure that the ai rsupply to the engine radiator is not blocked, e.g. by snow,
slush or ice.
226Warning and indicator lamps in the instrument cluster
On-board computer and displays

Warning/
indicator
lampNSignal type
Possiblec auses/consequences and M
Solutions
XAt coolant temperatures below 248 ‡(120 †), drive to the neares tqualified
specialist workshop.
XAvoid heavy loads on the engine as you do so, e.g. driving in mountainous terrain
and stop-and-go traffic.
Driving systems
Warning/
indicator
lampNSignal type
Possiblec auses/consequences and M
Solutions
·NThe red distance warning lamp lights up while the vehicleisinm otion.Awarning
tone als osounds.
You are approaching avehicleoras tationary obstacl einyourline of travel at too
high aspeed.
XBe prepared to brake immediately.
XPay carefu lattention to the traffic situation. You may have to brake or take
evasive action.
Further information on the distance warning function of Active Brake Assist
(
Ypage6 2).
Warning and indicator lamps in the instrument cluster227
On-board computer and displays
Z

Checking and addingother service
products
Checking coolan tlevel
GWARNING
The coolings ystem is pressurized, particularly
when th emotor is warm .Ifyou open th ecap,
you coul dbescalded if hot coolant sprays out.
Thereisar iskofi njury.
Let th eenginec ooldown before you open the
cap. Wear gloves and eye protection.S lowly
open th ecap to relieve pressure.
!The coolant may only be checked and cor-
recte dwhen th eengineisc ool(coolantt em-
peratur ebelow 10 4‡(40 †) .Checkin gthe
coolantw hen thecoolantt emperatur eis
above1 04‡(40 †) ma yresult in damage to
th ee ngineortot heengin ecoolings ystem.
XPar kthe vehicl eonal evel surface.
Only chec kthe coolan tlevel when th evehicl e
is on alevel surfac eand th eengineh as cooled
down .
XTurn th eSmartKey to position 2in th eigni-
tion loc k(Ypage 122).
XCheckthe coolan ttem perature display in th e
instrumen tcluster.
The coolan ttem perature mus tbebelow
10 4‡ (40 †).
XTurn th eSmartKey to position g
(Ypage 122) in th eignition loc k.
XSlowly turncap : counter-clockwise and to
reliev eexces spressure.
XTurn cap :further counter-clockwise and
remove it .
If th ecoolan tisatt helevel of marke rbar=
in th efiller neck when cold, there is enough
coolan tincoolan texpansion tan k;.
XIf necessary, add coolan ttha thas been tested
and approve dbyMercedes-Benz.
XReplacecap : and tur nitclockwise as far as
it will go.
Fo rfurther information on coolant, see
(
Ypage 318).
Windshiel dwasher system
GWARNIN G
Certain component sintheengin ecom part-
ment, suc hastheengine, radiato rand part s
of th eexhaust system, can become ver yhot.
Working in th eenginec om partmen tposes a
ris kofi njury.
Where possible, let th eenginec ooldown and
touch only th ecom ponent sdescribed in th e
following.
GWARNIN G
Windshield washer concentrate could ignit eif
it comes into contact wit hhot engin ecom po-
nent sort heexhaust system. There is arisko f
fir ea nd injury.
Mak esuret hatnow indshield washer con-
centrat eisspilled next to th efiller neck .
XTo open: pull cap:upwards by th etab.
XAd dthe premixed washer fluid.
XTo close: press cap :onto th efiller neck
until it engages.
If th ewasher flui dlevel drops belo wthe recom-
mended minimum of 1liter, amessage appears
in th emultifunction display promptin gyou to
add washer flui d(
Ypage 216).
Further information on windshield washer fluid/
antifreez e(
Ypage 319).
260Engine compartment
Maintenance and care

XDo not usehot water and do not wash the
vehicl eindirect sunlight.
XUse asofts po ngetoc lean.
XUseamildc leaning agent, such as acar
shampo oapproved by Mercedes-Benz.
XThoroughl yhosed ownthe vehicl ewithag en-
tle jet of water.
XDo not point the water jet directl ytowards the
ai ri nlet.
XUse plenty of water and rinse ou tthe sponge
frequently.
XRinse the vehicl ewithc lean water and dry
thoroughl ywithac hamois.
XDo not le tthe cleaning agent dry on the paint-
work.
Carefully remove al ldeposit sofroads alta s
soo naspossibl ew hend rivin ginw inter.
Powe rwashers
GWARNING
The water jet fromac ircular jet nozzle(dirt
blasters )can cause invisible exterio rdamag e
to the tire sorchassisc omponents. Compo-
nents damage dinthisw aymayf ailu nexpect-
edly .There is ariskofana ccident.
Do not us epower washers with circular jet
nozzles to clean the vehicle. Hav edamaged
tire sorc hassisc omponents replaced imme-
diately.
!Alway smaintain adistance of at least
11.8 in (30 cm )between the vehicl eand the
powe rwashern ozzle. Informatio nabout the
correct distance is availabl efromt he equip-
ment manufacturer.
Mov ethe powe rwashern ozzlearound when
cleaning your vehicle.
Do not ai mdirectl yata ny of the following:
RTires
RDoorg aps,roofgaps, joints, etc.
RElectrical components
RBattery
RConnectors
RLamps
RSeals
RTrim
RVentilatio nslots Damaged seals or electrical components can
lead to leaks or failures.
!Vehicles with decorative film: parts of your
vehicl earecovered with adecorative film.
Maintain adistance of at leas t27.5 in (70 cm)
between the parts of the vehicl ecovered with
the fil mand the nozzl eofthe high pressure
cleaner.
Informatio nabout the correct distance is
availabl efromt he eq uip
ment manufacturer.
Mov ethe powe rwashern ozzlearound when
cleaning your vehicle.
Cleanin gthe paintwork
!Do not affix:
Rstickers
Rfilms
Rmagnetic plate sorsimilar items
to painte dsurfaces .You could otherwise
damage the paintwork.
Scratches, corrosive deposits, area saffecte dby
corrosion and damage caused by inadequate
car ecanno talway sbec ompletel yrepaired .In
such cases, visit aquali fied specialis tworkshop.
XRemov edirti mmediately, where possible,
whil eavoidin grubbi ng too hard.
XSoakinsect remains with insect remove rand
rinse off the treated area safterwards.
XSoa kbirdd ropping swithw ater and rinse off
the treated area safterwards.
XRemov ecoolant, brake fluid ,tree resin, oils,
fuel sand greases by rubbing gently with a
cloth soaked in petroleu mether or lighter
fluid.
XUse tar remove rtoremove tar stains.
XUse silicone remove rtoremove wax.
If water no longe rforms "beads "onthe paint
surface, us ethe paint car eproducts recommen-
de da nd approved by Mercedes-Benz. Thi sisthe
cas eapproximately every threetof ivem onths,
depending on the climate conditions and the
car eproduct used.
If dirt hasp enetrated the paint surface or if the
paint hasb ecome dull ,the paint cleane rrecom-
mend ed a
nd approved by Mercedes-Benz
shoul dbeu sed.
Do not us ethese car eproducts in the sunoro n
the hoo dwhile the hoo dishot.
Care263
Maintenance and care
Z

Uniform TireQualityG rading Standards
Aunifor mstandard to grade the quality of tires
with regards to tread quality, tire traction and
temperature characteristics. The quality grad-
ing assessmentism ade by the manufacturer
following specification sfrom the U.S .govern-
ment .The ratings are molded int othe sidewall of
the tire.
Recommended tir epressures
The recommended tire pressure applies to the
tires mounted at the factory.
The Tire and Loading Information placard con-
tains the recommended tire pressures for cold
tires on afully loaded vehicle and for the maxi-
mum permissible vehicle speed.
The tire pressure table contains the recommen-
ded pressures for cold tires for various operat-
ing conditions, i.e. differingl oad and speed con-
ditions.
Increased vehicle weight due to optional
equipment
The combined weight of all standard and
optional equipment available for the vehicle,
regardless of whether it is actually installed on
the vehicle or not.
Rim
This is the part of the wheel on which the tire is
mounted.
GAWR (Gross Axle Weight Rating)
The GAWR is the maximum gross axle weight
rating. The actual load on an axle must never
exceed the gross axle weight rating. The gross
axle weight ratin gcan be found on the vehicle
identification plate on the B-pillar on the driver's
side.
Speed rating
The speed ratin gispart of the tire identification.
It specifies the speed range for which the tire is
approved.
GVW (Gross Vehicle Weight)
The gross vehicle weight includes the weight of
the vehicle includin gfuel, tools, the spare wheel,
accessories installed, occupants, luggage and
the drawbar noseweight ,ifapplicable. The gross
vehicle weight must not exceed the gross vehi-
cle weight ratin gGVWR as specified on the vehi-
cle identification plate on the B-pillar on the
driver'ss ide.
GVWR(Gross Vehicle Weight Rating)
The GVWR is the maximum permissible gross
weight of afully loaded vehicle (the weight of the
vehicle includin gall accessories, occupants,
fuel, luggage and the drawbar n
oseweight
,if
applicable). The gross vehicle weight ratin gis
specified on the vehicle identification plate on
the B-pillar on the driver'ss ide.
Maximum loaded vehicle weight
The maximum weight is the sum of:
Rthe curb weight of the vehicle
Rthe weight of the accessories
Rthe load limit
Rthe weight of the factory installed optional
equipment
Kilopascal (kPa)
Metric unit for tire pressure. 6.9 kPa corre-
sponds to1psi. Another unit for tire pressure is
bar. 100 kilopascals (kPa) are the equivalent of
1b ar.
Load index
In addition to the load-bearin gindex ,the load
index may also be imprinted on the sidewall of
the tire. This specifies the load-bearin gcapacity
more precisely.
Curb weight
The weight of avehicle with standard equipment
includin gthe maximum capacityoff uel, oil and
coolant .Italso includes the air-conditionin gsys-
tem and optional equipment if these are instal-
led in the vehicle, but does not include passen-
gers or luggage.
Maximum load rating
The maximum tire load is the maximum permis-
sible weight in kilogram sorlbs for which atire is
approved.
Maximum permissible tir epressure
Maximum permissible tire pressure for one tire.
Maximum load on one tire
Maximum load on one tire. This is calculated by
dividing the maximum axle load of one axle by
two.
306All about wheels and tires
Wheels and tires

differentfor every vehicle and can deviate
from the data shown here. You can find the
data applicable to your vehicle on the vehicle
identification plate.
Vehicle identification number (VIN)
XSlide the right-han dfronts eat to its rearmost
position.
XFold floor covering :upwards.
You will see VIN ;.
The VIN can also be found on the vehicle iden-
tification plate (
Ypage 314).
The VIN can also be found at the lower edge of
the windshield (
Ypage 315).
Engine number
:Emission control information plate, includ-
ing the certification of both federal and Cali-
fornian emissionss tandards
;VIN (on the lower edge of the windshield)
=Engine number (stamped int othe crank-
case)
Service productsa nd filling capaci-
ties
Important safetyn otes
GWARNING
Service product smay be poisonous and haz-
ardous to health. There is arisk of injury.
Comply with instructions on the use, storage
and disposal of servicep roductsonthe labels
of the respective original containers. Always
stor eservicep roductss ealed in their original
containers. Always keep servicep roductsout
of the reach of children.
HEnvironmental note
Dispose of servicep roductsinanenviron-
mentally responsible manner.
Service product sinclude the following:
RFuels
RLubricants (e.g. engin eoil, transmission oil)
RCoolant
RBrakef luid
RWindshield washer fluid
RClimate control system refrigerant
Components and servicep roductsmust match.
Only use productsr ecommended by Mercedes-
Benz. Damage which is caused by the use of
productsw hich have not been recommended is
not covered by the Mercedes-Benz warrant yor
goodwill gestures .Productsa pproved by
Mercedes-Benz are listed in this Operator's
Manual in the appropriate section.
Information on tested and approved products
can be obtained at aMercedes-Benz Service
Center or on the Internet at
http://bevo.mercedes-benz.co m.
You can recogniz eservice products approvedb y
Mercedes-Ben zbythe followingi nscription on
the containers:
RMB-Freigabe (e.g. MB-Freigabe 229.51)
RMB-Approval (e.g. MB-Approval 229.51)
Other designation sorrecommendations indi-
cat eal evel of quality or aspecification in
accordanc ewith an MB Shee tNumber (e.g. MB
229.5). They have not necessarily been
approvedbyM ercedes-Benz.
Service productsa nd filling capacities315
Technical data
Z

ModelMB-Freigabe orMB-Approval
All models229.5
Use only SAE 0W-40 or SAE 5W-40 engine oils
for Mercedes-AMG vehicles.
iMB approval is indicated on the oil contain-
ers.
Fillingc apacities
The following values refer to an engine oil
change, including the oil filter.
ModelCapacity
Mercedes‑AM Gvehicles5.8 US qt (5.5 l)
All other models5.9 US qt (5.6 l)
Additives
!Do not use any additives in the engine oil.
This could damage the engine.
Brake fluid
GWARNING
The brake flui dconstantly absorbs moisture
from the air. This lowers the boiling point of
the brake fluid. If the boiling point of the brake
flui dist oo low,v aporpockets may form in the
brake system when the brakes are applied
hard. This would impair braking efficiency.
There is arisk of an accident.
You should have the brake flui dreneweda t
the specified intervals.
When handling brake fluid, observe the impor-
tant safety notes on service products
(
Ypag e315).
The brake flui dchange interval scan be found in
the Maintenance Booklet.
Only use brake flui dapproved by Mercedes-
Benz in accordance with MB-Freigabe or MB-
Approval3 31.0.
Information about approved brake flui dcan be
obtained at any qualified specialist workshop or
on the Internet at
http://bevo.mercedes-benz.com.
iHave the brake flui dregularl yreplaced at a
qualified specialist workshop and the replace-
ment confirmed in the Maintenance Booklet.
Coolant
Important safety notes
GWARNING
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 down before you add anti-
freeze. Make sure that antifreeze is not spilled
next to the filler neck. Thoroughly cleant he
antifreeze from components before starting
the engine.
!Only add coolant that has been premixed
with the desired antifreeze protection. You
coul dotherwise damage the engine.
Further information on coolants can be found
in the Mercedes-Benz Specifications for Ser-
vice Products, MB BeVo 310.1, e.g. on the
Internet at http://bevo.mercedes-benz.com.
Or contact aqualified specialist workshop.
!Always use asuitable coolant mixture, even
in countries where high temperatures prevail.
Otherwise, the engine cooling system is not
sufficiently protected from corrosiona nd
overheating.
iHave the coolant regularl yreplaced at a
qualified specialist workshop and the replace-
ment confirmed in the Maintenance Booklet.
Comply with the important safety precautions
for service products when handling coolant
(
Ypag e315).
The coolant is amixture of water and corrosion
inhibitor/antifreeze concentrate. It performs
the following tasks:
RAnti-corrosion protection
RAntifreeze protection
RRaising the boiling point
If the coolant has antifreeze protection down to -35 ‡(-37 †), the boiling point of the coolant
during operation is approximatel y266 ‡
(130 †).
318Servicep roducts and filling capacities
Technical data

The antifreeze concentrate/corrosion inhibitor
concentration in the engine cooling system
should:
Rbe at least 50%. This will protectthe engine
cooling system against freezin gdown to
approximately -35 ‡(-37 †)
Rnot exceed 55% (antifreez eprotection down
to -49 ‡[-45 †]) .Otherwise ,hea tw ill no tbe
dissipated as effectively
Mercedes-Ben zrecommends acoolan torc or-
rosio ninh ibitor/antifreez econcentrat ein
accordance wit h
MB Specification sfor Servic eProducts 310. 1.
iWhen the vehicle is first delivered, it is filled
with acoolant mixture that ensures adequate
antifreeze and anti-corrosion protection.
iThe coolant is checked with every mainte-
nanc einterval at aqualified specialist work-
shop.
Filling capacities
ModelCapacity
Mercedes ‑AMG
vehiclesApprox .12.6USq t
(11.9l )
Allo ther modelsApprox. 8.2 US qt
(7.8 l)
Windshield washe rsystem
Important safety notes
GWARNING
Windshieldw asher concentrate coul dignite if
it comes into contact with hot engine compo-
nents or the exhaust system .There is arisk of
fire and injury.
Make sure that no windshield washer con-
centrate is spilled next to the filler neck.
!Only MB SummerFi tand MB WinterFit
washer flui dshould be mixed together. The
sprayn ozzles may otherwise become
blocked.
Do not use distille dorde-ionized water. Other-
wise, the levels ensor may giveafals ereading. When handling washer fluid, observe the impor-
tant safety notes on service products
(
Ypag
e315).
At temperatures above freezing:
XFill the washer flui dreservoir with amixture of
water and windshield washer fluid, e.g. MB
SummerFit.
Add 1part MB SummerFi tto100 parts water.
At temperatures below freezing:
XFill the washer flui dreservoir with amixture of
water and washer fluid, e.g. MB WinterFit.
For the correct mixing ratio refer to the infor-
mation on the antifreeze reservoir.
iAdd windshield washer fluid, e.g. MB Sum-
merFit or MB WinterFit, to the washer flui dall
yea rround.
Climate control system refrigerant
Important safety notes
The climate control system of you rvehicleisf il-
led with refrigerant R ‑134a.
The instruction label regarding the refrigerant
type use dcan be found on the left, on the under-
side of the hood.
!Only the refrigerant R ‑134a and the PAG oil
approved by Mercedes-Benz may be used.
The approved PAG oil may not be mixed with
any other PAG oil that is not approved for
R-134a refrigerant. Otherwise, the climate
control system may be damaged.
Service work, such as refilling with refrigerant or
replacing component parts, may only be carried
out by aqualified specialist workshop. All appli-
cabl eregulations, as wellasS AE standard J639,
must be adhered to.
Always have work on the climate control system
carrie dout at aqualified specialist workshop.
Service products and filling capacities319
Technical data
Z