2019 MERCEDES-BENZ SLC ROADSTER coolant

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 242). 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 264)andthenotes ontowing with
both axles onthe ground (Ypage 264). DYNAMIC
SELECTbutt on
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 .Aft erashort 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
afew 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
rin mind thattheoutsid etempe raturedis-
pl ay indi cates thetempe raturemea suredand
doe snot recor dthe roadtempe rature.
The outsid etempe raturedispl ayisin the mul-
tifu nction displ ay(Y page 169 ).
A chang ein the outsid etempe ratureisshow n
in the multifunction displ ayafte ra del ay. Co
olant temperature gage G
WARNI
NG
Ope ning thehoodwhe nthe engi neisover -
hea ted orwhe nthere isafire inthe engi ne
compa rtment couldexpo seyouto hot gases
or other serviceprod ucts. Thereisarisk of
inju ry.
Let anover heated engi necool downbef ore
ope ning thehood.Ifthere isafire inthe
engi necompa rtment, keepthehoodclos ed
and contact thefire departme nt.
! A
displ aymess ageis show nif the cool ant
tempe ratureistoo high.
If the cool anttempe ratureisover 248‡
(120 †),donot continu edri ving. 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 ecorre sponds toacool anttempe rature
of approxi mate ly248 ‡(120 †).
Unde rnorma lope ratingcondi tions andatthe
corre ctcool antlevel, the cool anttempe rature
ga ug emay risetothe 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 yto pos ition0047 inthe ignition
lock.
You cancontrol themultifunction displ ayand
the setting sin the on-bo ardcompu terusing
the buttons onthe multifunction steering
whe el.
Le ftco ntrol panel 0059
0065 R
Ca lls up the menu andmenu bar 0063
0064 Pres
sbrie fly:
R Scrol lsin lists
R Sele ctsasub menu orfuncti on
R In the Audi o Audi
omenu :sel ects the
pre vious ornext station,whe n
the preset list or stati onlist is
acti ve,oran audio track orvid eo
scene
R In the Tel Tel
(teleph one) menu :
swi tches tothe phoneboo kand
sel ects aname ortele pho ne
numb er 168
Di
splay sand operationOn-b oard computer anddispl ays

X
Press the0064 or0063 button toselect the
Belt Adjustment Belt
Adjustment function.
When theBelt Adjustment Belt
Adjustment functionis
activat ed,the seat beltisdisplayed in
orange inthe multifunc tiondisplay.
X Press the0076 button tosave thesetting.
For further informationonbelt adjustmen t,
see (Ypage 42).
Switching thefold-in mirrorswhen lock-
ing featu reon/off
This funct ionisonly availabl ewhen thevehicle
is equipped withtheelectric alfold-in function.
This funct ionisonly availabl ein Canada.
When youactivat ethe Auto. Mirror Fold‐ Auto.
Mirror Fold‐
ing ing
funct ion,theexter iormirrors arefolded in
when thevehicle islocked.
If you have switched onthe Auto. Mirror Auto.
Mirror
Folding Folding
functionand youfold inthe exter ior
mirrors usingthebutton onthe door
(Y page 93),they willnotfold outautomati-
cally. Theexter iormirrors canthen onlybefol-
ded outusing thebutton onthe door.
X Press the0059 or0065 button onthe steer-
ing wheel toselect theSett. Sett.
menu.
X Press the0064 or0063 button toselect the
Convenienc e Convenienc
esubmenu.
X Press 0076toconf irm.
X Press the0064 or0063 button toselect the
Auto. Mirror Folding Auto.
Mirror Folding function.
If the Auto. Mirror Folding Auto.
Mirror Folding functionis
switched on,the multifunc tiondisplay
shows theexter iormirror inorange.
X Press the0076 button tosave thesetting.
Restor ingthe factor ysettings X
Press the0059 or0065 button onthe steer-
ing wheel toselect theSett. Sett.
menu.
X Press the0064 or0063 button toselect the
Factory Setting Factory
Settingsubmenu.
X Press 0076toconf irm.
The Reset AllSettings? Reset
AllSettings? function
appears.
X Press the0064 or0063 button toselect No No
or Yes Yes.
X Press the0076 button toconf irmtheselec-
tion.
If you have selected Yes Yes
andconf irmed, the
multifunc tiondisplay showsaconf irmation
message. For
safety reasons, theDaytime Running Daytime
Running
Lights Lights
functioninthe Lights Lights
submenu is
only reset ifthe vehicle isstation ary. AMG
menu (Mercedes-AMG SLC43)
War m-up 0043
Digital speedometer
0044 Gear indicator
0087 Upshift indicator
0085 Engine oiltemperat ure
0083 Coolant temperat ure
0084 Transmission oiltemperat ure
X Press the0059 or0065 button onthe steer-
ing wheel toselect theAMG AMG
menu.
Upshift indicator: upshiftindicator UP UP
0087
indicates thattheengine hasreached the
overrevv ingrange wheninthe manual drive
program.
Engine andtransmission oiltemp era-
tur e:when theengine andtransmission are
at normal operating temperature,oiltem-
perature 0085and 0084are displayed inwhite in
the multifunc tiondisplay.
If the multifunc tiondisplay showsoiltem-
perature 0085or0084 inblue, theengine orthe
tran smission arenot yetatnormal operating
temperat ure.Avoid driving atfull engine out-
put during thistime. Menus
andsubmenus
179On-boardcomputerand display s Z

Disp
laymes sages Poss
iblecauses/co nsequences and 0050 0050
Solu tions Ada
ptiveHighbeam Ada
ptiveHighbeam
Ass ist Currently Ass
ist Currently
Una vailableSee Una
vailableSee
Ope rator'sMan ual Ope
rator'sMan ual Ad
apt ive Highbea mAssis tis deac tivat ed and tempo rarily ino per a-
ti ve.
Pos siblecaus esare:
R The windsh ield inthecam era'sfie ldof vis ion isdir ty.
R Vis ibilit yis imp aire ddue toheav yrain ,sn ow orfog .
X Clean thewin dsh ield.
If th esyst emdetects that thecam eraisfull yoper ationalagain ,th e
Ada ptiveHighbeamAssist NowAvailable Ada
ptiveHighbeamAssist NowAvailable message isdis-
played .
Ad apt ive Highbea mAssis tis oper ationalagain . Ada
ptiveHighbeam Ada
ptiveHighbeam
Ass ist Inoperative Ass
ist Inoperative Ad
apt ive Highbea mAssis tis fault y.
X Vis itaqualif iedspecialistwor kshop . Engin
e Disp
laymes sages Poss
iblecauses/co nsequences and 0050 0050
Solu tions 00AC
Che ckCoolant Che
ckCoolant
Lev elSee Opera‐ Lev
elSee Opera‐
tor 'sManual tor
'sManual The
coolan tlev elistoolow.
! Av
oid longer journ eys when there isins ufficien tco olan tin the
en gin eco olin gsyst em. You could other wise damag eth een gin e.
X Ad dco olan t,obs erving thewarn ingnotesbef ore doin gso
(Y page 242).
X Ifyou need toadd coolan tmor eoft en than usual, haveth een gin e
co olan tsyst emchecke dat aqualif iedspecialistwor kshop . 00AC The
fanmot orisdef ective.
X Ifth eco olan tte mpe rature gage isbelo wtheH mar king
(Y page 168), drive on tothene xt qualif iedspecialistwor kshop .
X Av oid heav yloads ontheen gin eas you doso, e.g. dri vin gin
moun tainous terrain and stop- and -gotraff ic. 194
Disp
laymes sage sOn -boar dcomp uter anddi sp lay s

Engine
Wa
rning/
ind icat or
lam p 00510051
Signa lty pe
Possi blecauses/cons equences and0050 0050
Solu tions 00B9
0051
The yellow CheckEn gin ewarn inglamp lightsup while theeng ineisrun ning.
Ther emay beamalf unction,for exam ple:
R in theeng ineman agem ent
R in thefuel inject ion syst em
R in theexh aust system
R in theign ition syst em
R in thefuel system
The emis sion limit values maybeexc eeded andtheeng inemay beinemer -
gen cymod e.
X Visi ta qualifi edspec ialist workshop immediat ely.
In som est ate s,you must immediat elyvisita qualifi edspec ialist workshop as
soon astheyellow CheckEn gin ewarn inglamp lightsup. This isdue tothelegal
requi rementsin eff ect inthese state s.Ifin doubt ,ch eck whet hersuchlegal reg-
ulati onsapply inthest ate inwhic hyou arecurren tlydriv ing. 00B6
0051
The yellow reservefuel warn inglamp lightsup while theeng ineisrun ning.
The fuel levelhas dropped intoth eres erveran ge.
X Refuel atthenear estgas statio n. 00B6
0051
The yellow reservefuel warn inglamp flashes while theveh icle isin mot ion.
In addit ion,th e00B9 CheckEn gin ewarn inglamp maylight up.
The fuel fillercap isno tclo sed correctlyorthefuel systemisleak ing.
X Chec kth at thefuel fillercap iscor rectlyclosed.
X Ifth efu el filler capisnot corr ectly closed :clo sethefuel fillercap.
X Ifth efu el filler capisclosed :visi ta qualifi edspec ialist workshop. 00AC
0051
The redcoolant warn inglamp lightsup while theeng ineisrun ningand the
coo lant temper aturegage isat thest art ofthesc ale.
The temper aturesen sor forthecoo lant temper aturegage ismalf unctionin g.
The coolant temper atureis no longer bein gmon itored. Thereis arisk ofeng ine
damag eif th ecoo lant temper atureis toohigh .
X Pull overand stop theveh icle safe lyand switchoff theeng ine,payin gatt en-
tio nto road andtraff iccon dition s.Do notcon tinue driv ingunde rany circum -
st anc es.
X Sec ure theveh icle again stroll ing away (Ypage 134).
X Con sult aqualifi edspec ialist workshop. Wa
rning and indicat orlam ps
213On-boar dcomp uter and displa ys 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 ywhen themotor iswarm. Ifyou open
the cap, youcould bescalde difhot coolant
spray sout. There isarisk 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 swith KEYLESS- 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 cap0043half 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 301).
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 isarisk 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. Eng
inecompar tment
243Maintenanc eand care
Z

Make
surethatwindshield washerconcen-
trate isnot spilled inthe vicinity ofthe filler
neck . Example
X To open: pullcap 0043upwa rdsbythe tab.
X Add thepremixed washerfluid.
X To close :press cap0043onto thefiller neck
until itengages.
If the washer fluidlevel drops below therec-
ommended minimumfluidlevel of1US qt
(1 liter), amessage appearsinthe multifunc-
tion display prompting youtoadd washer fluid
(Y page 206).
Further information onwindshield washer
fluid/antifreeze (Ypage 302). Overview
ofthe engine compart -
ment Example
engine
0043 Engin eoil cap
0044 Oildipstick
0087 Brake fluidreservoir
0085 Washer fluidreservoir
0083 Coolant expansion tank ASSYST
PLUS Service
display
The ASSYST PLUS service interval displayindi-
cates theremaining timeperiod orthe remain-
ing distance tothe next regular service due
date.
Inform ationonthe type ofservice andservice
intervals (seetheseparate Maintenanc eBook-
let).
You canobtain further information froman
authorized Mercedes-Ben zCenter orat
http: //www.mbusa.com (USAonly).
i The
ASSYST PLUS service interval display
does notshow anyinformation onthe
engine oillevel. Observe thenotes onthe
engine oillevel (Ypage 241).
The multifunction displayshowsaservice dis-
play forafew seconds, e.g.:
R Service Ain ..Days Service
Ain ..Days
R Service ADue Service
ADue
R Service AExceeded by..Days Service
AExceeded by..Days
Depending onthe operating conditionsof the
vehicle, theremaining timeordistance until
the next service duedate isdisplay ed.
The letter A A
or B B,
possibly inconn ection witha
number oranother letter,shows thetype of
service. A A
stands foraminor service andB B
for
a major service.
You canobtain further information froman
authorized Mercedes-Ben zCenter.
Depending onhow thevehicle isused, the
ASS YST PLUS service interval displaymay
reduce theservice interval, e.g.inthe follow-
ing situations:
X the vehicle isprimarily usedtotravel short
distances
X ifthe engine isoften leftidling forlong peri-
ods
X ifthere arefrequent coldstart phases
Mercedes-Ben zrecommen dsyou avoid such
operating conditions.
The ASSYST PLUS service interval displaydoes
not take intoaccount anyperiods oftime dur-
ing which thebattery isdisconnec ted. 244
ASSY
STPLUSMaintenance andcare

X
Thoroughly hosedown thevehicle witha
gentle jetofwater.
X Do not point thewater jetdirectly towards
the airinlet orthe edges ofdecorative foils.
X Use plenty ofwater andrinse outthe
sponge frequent ly.
X Rinse thevehicle withclean water anddry
thoroughly withachamois.
X Do not letthe cleaning agentdryonthe
paintwork orthe decorative foils.
Carefully removealldeposits ofroad saltas
soon aspossible whendriving inwinter.
Power washers G
WARNIN
G
The water jetfrom acircular jetnoz zle(dirt
blasters) cancause invisible exteriordam-
age tothe tires orchassis compon ents.
Component sdamaged inthis way may fail
unexpect edly.There isarisk ofan accident .
Do not use power washers withcircular jet
noz zles toclean thevehicle. Havedamaged
tires orchassis compon entsreplaced imme-
diately.
! Vehicles
withdecorative film:parts ofyour
vehicle arecovered withdecorative film.
Maintain adistance ofat least 27.5in
(70 cm) between thefilm-c overed partsof
the vehicle andthenozz leof the power
washer.
Infor mation aboutthecorrec tdistance is
availabl efrom theequipment manufacturer.
Move thepower washer nozzlearound when
cleaning yourvehicle.
The water temperat ureofthe power washer
must notexceed 140‡(60 †).
! Always
maintain adistance ofat least
12 in(30 cm) between thevehicle andthe
power washer nozzle.Infor mation aboutthe
correc tdistance isavailabl efrom theequip-
ment manufact urer.
Move thepower washer nozzlearound when
cleaning yourvehicle.
Do not aim directly atany ofthe following:
R Tires
R Door gaps, roofgaps, joints,etc.
R Elect ricalcompon ents R
Batt ery
R Plug-type couplings
R Light bulbs
R Seals
R Trim elements
R Vent ilation slots
Damaged sealsorelectric alcompon ents
can lead toleaks orfailures.
! If
you clean thetank fillerrecess whenitis
open, donot use apower washer. Thiscan
cause damage tothe seals orother compo-
nent s.
Cleaning thepaint work !
Do
not affix:
R stick ers
R films
R magnetic platesorsimilar items
to painted surfaces. Youcould otherwise
damage thepaintwork .
Scr atches, corrosiv edeposits, areasaffected
by corrosion anddamage causedbyinade-
quate carecannotalway sbe completely
repaired. Insuch cases, visitaqualified spe-
cialist workshop.
X Remove dirtimmediately, wherepossible,
while avoiding rubbingtoohard.
X Soak insect remains withinsect remover
and rinse offthe treated areasafterwards.
X Soak birddroppings withwater andrinse off
the treated areasafterwards.
X Remove treeresin, oils,fuels andgreases by
rubbing gentlywithacloth soaked inpetro-
leum ether orlighter fluid
X Remove coolantandbrake fluidwithamoist
cloth andclear water.
X Use tarremover toremove tarstains.
X Use silicone remover toremove wax.
If water nolonger forms"beads" onthe paint
surface, usethepaint careproducts recom-
mended andapproved byMercedes- Benz.This
is the case approximately everythreetofive
mont hs,depending onthe climate conditions
and thecare product used.
If dirt has penetr atedthepaint surface orif
the paint hasbecome dull,thepaint cleaner
recomm endedandapproved byMercedes-
Benz should beused. Care
247Maintenance andcare Z