coolant temperature MERCEDES-BENZ SLC 2020 Owners Manual

Problem
Possible
causes/co nsequences and0050 0050
Solutions The
coolant tempera-
ture display showsa
value above 248‡
(120 †).The coolant
warning lampmayalso
be on and awarning
tone maysound. The
coolant levelistoo low. Thecoolant istoo hotand theengine is
no longer beingcooled sufficiently.
X Stop assoon aspossible andallow theengine andthecoolant to
cool down.
X Check thecoolant level(Ypage 243). Observe thewarning notes
as you dosoand add coolant ifnecessary. If
the coolant leveliscorrect ,the engine radiator fanmay befaulty.
The coolant istoo hotand theengine isno longer beingcooled suf-
ficiently.
X At coolant temperatures below248‡(120 †),drive tothe near-
est quali fiedspecialist workshop.
X Avoid heavy loadsonthe engine asyou doso, e.g. driving in
mountainous terrainandstop-and- gotraffic. Notes
ontowing vehicles
The vehicle isnot suitable forattaching tow
bar systems, suchasthose usedforflat tow-
ing ordinghy towing.
Att aching orusing towbarsystems mayresult
in damage tothe vehicle.
When towing avehicle withtowbarsystems,
safe driving characterist icscannot beguaran-
teed forthe towing vehicle orthe towed vehi-
cle.
The vehicle/vehicle combinationmayswerve.
Observe thepermissible towingmethods
(Y page 265)andthenotes ontowing with
both axles onthe ground (Ypage 265). DYNAMIC
SELECTbutton
Use theDYNAMIC SELECTbutton tochange
the drive program. Depending onthe drive pro-
gram selected thefollowing vehiclecharacter-
istics willchange:
R the drive (engine andtransmission manage-
ment)
R the suspension orthe adaptive adjustable
damping onlyonvehicles withAMG RIDE
CONTROL sportssuspension
R the sound ofthe exhaust system(vehicles
with sports exhaust system)
R the steering
R the availa bilityofthe ECO start/ stopfunc-
tion Each
timeyoustart theengine withtheSmart-
Key orthe Start /Stopbutton, driveprogram C
is activated. Forfurther information about
startin gthe engine, see(Ypage 119). X
Press DYNAMIC SELECTbutton 0043asmany
times asnecessary untilthedesired drive
program isselected.
The selected driveprogram appearsinthe
multifunct iondisplay .After as hort period of
time, thedisplay goesoutand thesymbol
for the selected driveprogram appears.
In addition, thecurrent driveprogram set-
tings aredisplay edbriefly inthe multimedia
system display.
i In
af ew countr ies,theECO start/ stop
funct ionisdeactivated atthe factory dueto
the availa blefuel grade. Inthis case, the
ECO start/ stopfunct ionisnot availa blein
any drive program, regardless ofthe display
in the multimedia systemdisplay.
In city traffic andstop-st arttraffic, drivepro-
gram Cis recommen ded. 124
DY
NAMIC SELECTbutt onDriving andparking

Bea
rinm indthat theoutsid etempe raturedis-
pl ay indi cates thetempe raturemea suredand
doe snotrecor dthe roa dtempe rature.
The outsid etempe raturedispl ayisin the mul-
tifu nction displ ay(Y page 170 ).
Ac hang eint he outsid etempe ratureisshow n
in the multifunction displ ayafte rad elay . Co
olant temperature gage G
WARNI
NG
Ope ning thehoodwhent he engi neisover -
hea ted orwhe nthere isaf ire inthe engi ne
compa rtment couldexpo seyout oh otgases
or other serviceprod ucts. Thereisar isk of
inju ry.
Let anover heated engi necool downbefore
ope ning thehood.Ifthere isaf ire inthe
engi necompa rtment, keepthehoodclosed
and contact thefire departme nt.
! Ad
ispl ay mess ageiss how nifthe cool ant
tempe ratureistoo high.
If the cool anttempe ratureisover 248‡
(120 †),donot continu edriving. The
engi newillother wise be damag ed.
The coolanttempe raturegage isin the instru -
ment cluster onthe right-ha ndside
(Y page 32).
The Hmarki nginthe cool anttempe rature
ga ug ec orre sponds toac ool ant tempe rature
of approxi mate ly248 ‡(120 †).
Unde rnorma lope rati ngcondi tions andatthe
corre ctcool antlevel, the cool anttempe rature
ga ug em ayrise tothe Hmarki ng. Ope
rating theon-bo ard computer
Ove rview 0043
Multifunctio ndispl ay
0044 Right control panel
0087 Left control panel
X To acti vate theon-bo ard computer: turn
the SmartKe ytop ositio n0047 inthe ignition
lock.
You cancontrol themultifunction displ ayand
the setting sint he on-bo ardcompu terusing
the buttons onthe multifunction steering
whe el.
Le ftco ntrol panel 0059
0065 R
Ca llsu pthe menu andmenu bar 0063
0064 Pres
sbriefly:
R Scrol lsin lists
R Sele ctsasubmenu orfuncti on
R In the Audi o Audi
omenu :selects the
pre vious ornext station,whe n
the preset list or stati onlist is
acti ve,oran audiot rack orvid eo
scene
R In the Tel Tel
(teleph one) menu :
swi tches tothe phoneboo kand
sel ects aname ortele pho ne
numb er Di
splay sand ope ration
169On-board computer anddispl ays Z

If
you need todo any work inside theengine
compartment:
R switch offthe ignition
R never reach intothearea where thereisa
risk ofdanger frommoving components,
such asthe fanrotation area
R remove jewelryandwatches
R keep items ofclothing andhair, forexam-
ple, awayfrom moving parts G
WARNING
The cooling systemispressu rized,particu-
larl yw hen themotor iswarm. Ifyou open
the cap, youcould bescalde difh ot coolant
spray sout. There isar isk ofinjury.
Let the engine cooldown before youopen
the cap. Wear protective glovesandprotec-
tive eyew earwhen opening. Openthecap
slow lyto relea sepressu re. Example
X Park thevehicle onalevel surface.
Only check thecoolant levelwhen thevehi-
cle ison alevel surface andtheengine has
cooled down.
X Turn theSmartKey topositio n0048 inthe igni-
tion lock (Ypage 118).
On vehicle swithKEYLESS- GO,press the
Start/St opbutton twice(Ypage 118).
X Check thecoolant temperature gageinthe
multifu nctiondisplay.
The coolant temperature mustbebelow
158 ‡(70 †).
X Turn theSmartKey topositio n0092
(Y page 118)inthe ignition lock. X
Slowl yturn cap 0043half aturn counter-clock-
wise toallow excess pressureto escape .
X Turn cap0043further <004600520058005100570048005500100046004F00520046004E005A004C0056
0048[ and
remove it.
If the coolant isat the level ofmarker bar
0087 inthe fillerneck when cold,there is
enough coolant incoolant expansion
tank 0044.
If the coolant levelisappro ximately 0.6in
(1.5 cm)above marker bar0087inthe filler
neck when warm, thereisenough coolant in
expansion tank0044.
X Ifnecessary ,add coolant thathasbeen tes-
ted and appro vedbyMercedes-Benz.
X Repl acecap 0043and turn itclockwise asfar
as itwil lgo.
Further information oncoolant (Ypage 303).
Windshie ldwashe rsystem G
WARNING
Certai ncomponents inthe engine compart-
ment, suchasthe engine, radiator andparts
of the exhau stsystem, canbecome very
hot. Working inthe engine compartment
poses arisk ofinjury.
Where possible,let the engine cooldown
and touch onlythecomponents describedin
the follow ing. G
WARNING
If you open thehood when thedrive system
has overhea tedorduri ngafire inthe engine
compartment, youcould come intocontact
with hotgases orother escapi ngopera ting
flui ds. There isar isk ofburns.
Let the overhea tedcomponents cooldown
before opening thehood. Inthe event ofa
fire inthe engine compartment, keepthe
hood closed andcallthefire service. G
WARNING
Windshi eldwash erconcentrate ishighl y
flamma ble.Ifwindshi eldwash erconcentrate
gets onto hotcomponents ofthe engine or
the exhau stsystem, itcan ignite. Thereisa
risk offire and injury. 244
Eng
inecompar tmentMaintenanc eand care

Information
aboutappro vedbrake fluidcan be
obtained atany qualifiedspecia listworkshop
or on the Internet at
<004B005700570053001D00120012004500480059005200110050004800550046
00480047004800560010004500480051005D0011004600520050[ .
i Have
thebrake fluidregul arly repla cedata
qua lifiedspecia listworkshop andthe
repla cement confirmed inthe Maintenance
Booklet. Coo
lant
Important safetynotes G
WARNING
If antifreeze comesintocontact withhot
components inthe engine compartment, it
may ignite. Thereisar isk offire and injury.
Let the engine cooldown before youadd
antifreeze. Makesurethatantifreeze isnot
spil led next tothe fillerneck. Thorou ghly
clean theantifreeze fromcomponents
before starting theengine.
! Only
addcoolant thathasbeen premixed
with thedesire dantifreeze protection. You
could otherwise damagethe engine.
You canfind additional notes onthe coolant
in the follow ingplaces:
R in the Mercedes-Benz Specificationsfor
Service Products,MBBeVo 310.1
- on the Internet at
<004B005700570053001D00120012004500480059005200110050004800550046
00480047004800560010004500480051005D0011004600520050[
- on the Mercedes-Benz BeVoapp
R aq ualifie dspecia lizedworkshop
! Alway
suseasuita blecoolant mixture,
even incountries wherehightemperature s
prevai l.
Otherwise ,the engine cooling systemisnot
sufficie ntlyprotected fromcorrosion and
overhea ting.
i Have
thecoolant regularlyrepla cedata
qua lifiedspecia listworkshop andthe
repla cement confirmed inthe Maintenance
Booklet.
Compl ywiththe important safetynotesfor
service productswhen handli ngcoolant
(Y page 299). The
coolant isam ixture ofwater andanti-
freeze/corrosion inhibitor.Itis responsib lefor
the follow ing:
R anti-corrosion protection
R antifreeze protection
R raisi ngthe boiling point
If the coolant hasantifreeze protection down
to -35 ‡(-37 †), theboiling point ofthe cool-
ant duri ngopera tionisappro ximately 266‡
(130 †).
The <004400510057004C0049005500480048005D0048001200460052005500550052
0056004C00520051[ inhibitorconcentr a-
tion inthe engine cooling systemshould:
R be atlea st50% .This willprotect theengine
cooling systemagainst freezing downto
appro ximately -35‡(-37 †).
R not exceed 55%(antifreeze protectiondown
to -49 ‡[-45 †]). Otherwise ,heat willnot
be dissi pated aseffectively .
If the vehicle haslost coolant, addequa l
amou ntsofwater and<004400510057004C0049005500480048005D0048001200460052005500550052
0056004C00520051[
inhibi tor.
Mercedes-Benz recommendsanantifreeze/
corrosion inhibitorconcentr ateinaccordance
with MBSpecificatio nsfor Service Products
310.1.
i When
thevehicle isfirst delivered, itis fil-
led with acoolant mixture thatensures ade-
qua teantifreeze andanti-corrosion protec-
tion.
i The
coolant ischecked withevery mainte-
nance interval ataq ualifie dspecia listwork-
shop.
Fil ling capacitie s Missi
ngvalu eswere notavai lableat time of
going toprint. Model Capacity
SLC
300 Approx.
8.5USqt
(8.0 l) Mercede
s‑Benz
SLC 43AMG Approx.
8.2USqt
(7.8 l) Servic
eproducts andfilling capacitie s
303Techni caldata Z