2020 MERCEDES-BENZ SLC check engine

Do
not getinto thevehiclea gain du rin gthe
ref ueling pro ces s.Othe rwise, electro static
cha rge couldbu ildu pagain.
! Do
not used iese ltor efue lveh icles with a
ga sol ine eng ine.Don otsw itch onthe igni-
tio nifyou acc identa llyr efue lw itht he wrong
fu el.O the rwise, the fuel willente rthe fuel
sy stem .Even sma llam ounts ofthe wrong
fu el cou ldres ulti nd amaget ot he fuel sys-
tem andtheengine.Notifyaq ualifi ed spe-
cia list wo rksh opand have the fuel tank and
fu el lines drainedc omp letel y.
! Ove
rfilling the fuel tank couldda ma gethe
fu el system .
! Ta
ke car enottospilla ny fuel on painte d
su rfa ces .You cou ldothe rwised amaget he
pa intw ork.
! Use
afilter when adding fuel fro maf uel
can. Thefuel lines and/or thefuel inje ctio n
sy stem couldothe rwiseb eb locke dbyparti-
cle sfromt hefuel can.
If yo uo verfillthe fuel tank, fuel cou ldspray
ou tw hent he fuel pu mp nozzl eisr em ove d.
For furthe rinfo rma tiono nfueland fuel qu ality
(Y page 300 ). Ref
ueling
Ge neral info rmatio n The
fuel fillerf lapi su nlocke dorloc ked auto-
ma tica llyw heny ou unlock orlock the vehicle
wi th the Sma rtKeyorusing KEYL ESS-G O.
The positio no fthe fuel fillerc ap isdisp laye d
00B6 inthe instrument cluster .The arrow next
to the filling pump indicates the side ofthe
veh icle. On
the insideo fthe fuel fillerc ap,you willfind
info rma tiono nthe reco mme ndedfuel.
Ope ning the fuelfille rf lap 0043
Toopen the fuel fillerf lap
0044 Toinsert the fuel fillerc ap
0087 Tire pre ssu retab le
0085 Instr uctionlabe lfor fuel typ etob erefu-
el ed
X Swi tch the engineoff.
X Re mov ethe Sma rtKeyfromt heigniti on
lo ck.
X Pre ssthe fuel fillerf lapi nt he directi onof
ar row 0043.
The fuel fillerf laps wing su p.
X Tu rn the fuel fillerc ap cou nter-c lockwi se
and remove it.
X Inse rtthe fuel fillerc ap into theholder
bra cket onthe insideo ffue lfille rf lap 0044.
X Co mpl etelyins ert the fillern eck ofthe fuel
pu mp nozzl einto thetank, hookinp lace
and refuel.
X Onl yfillt he tank untilthe pump nozzl e
sw itch esoff.
i Do
not adda nymor efuelafter the pump
stop sfilling for the first time .Othe rwise, fuel
ma ylea ko ut.
Cl os ingt he fue lfille rf lap X
Re place thecap onthe fillern eck and turn
clo ckwi seunti lite ngages audibly.
X Close thefuel fillerf lap.
i Cl
ose thefuel fillerf lapb efor el oc king the
veh icle.
i If
yo ua redrivin gw itht he fuel fillerc ap
op en, the 00B6 reservefuelw arning lamp
fla she s.The 00B9 Check Engi newarning Ref
ueling
133Dr ivi ng andp arki ng Z

Mercedes-Ben
zrecommen dsthat youonly
have brake pads/linings installedonyour vehi-
cle which havebeen approved forMercedes-
Benz vehicles orwhich correspond toan
equival entqual itystandard. Brakepads/
linings whichhavenotbeen approved for
Mercedes-Ben zvehicles orwhich arenot ofan
equival entqual itycould affect yourvehicle's
operating safety.
Mercedes-Ben zrecommen dsthat youonly use
brake fluidthathasbeen specially approved
for your vehicle byMercedes-Ben z,or which
corresponds toan equival entqual itystandard.
Brake fluidwhich hasnotbeen approved for
Mercedes-Ben zvehicles orwhich isnot ofan
equival entqual itycould affect yourvehicle's
operating safety.
High-perf ormance brakesystem
(exce ptMercedes-AMG SLC43) AMG
brake systems aredesigned forheavy
loads andhave componen tswith correspond-
ing properties. Thismay lead tonoise when
braking. Thiswilldepend on:
R Speed
R Braking force
R Ambient condition s,e.g. temperature and
humidity
The wear ofindividual componen tsof the
brake system, suchasthe brake pads/linings
or brake discs, depends onthe individual driv-
ing style andoperating conditions.
For this reason, itis impossible tostate amile-
age that willbevalid under allcircumstan ces.
An aggressive drivingstylewilllead tohigh
wear. Youcanobtain moreinformation onthis
from aqualified specialist workshop.
New andreplaced brakepadsanddiscs only
reach theiroptimum brakingeffectaftersev-
eral hundred kilometers ofdriving. Compen-
sate forthis byapply inggreater forcetothe
brake pedal. Keepthisinmind, andadapt your
driving andbraking accordingly duringthis
break-in period.
Exc essive heavybraking resultsincorrespond-
ingly highbrake wear.Observe thebrake sys-
tem warning lampinthe instrumen tcluster
and note anybrake status messages inthe
multifunction display.Especially forhigh per-
formance driving,itis important tomaintain
and have thebrake system checkedregularly . Driving
onwet roads
Hydr oplaning If
water hasaccumulated toac ertain depthon
the road surface, thereisad anger ofhydro-
planing occurring.
For this reason, inthe event ofheavy rainorin
condition sinw hich hydropla ningmayoccur,
you must driveinthe following manner:
R lower yourspeed
R avoid ruts
R avoid sudden steering movement s
R brake carefully
Driving onflooded roads !
Do
not drive through floodedareas.Check
the depth ofany water before driving
through it.Drive slowly through standing
water. Otherwise, watercouldenterthe
vehicle interior orengine compartmen t.It
can then damage theengine's orautomatic
transmission' selectronic componen ts.It
can also besucked inby the engine's air
intake connection andcause engine dam-
age. Winter
driving G
WARNING
If you shift down onaslippery roadsurface
in an attempt toincrease theengine's brak-
ing effect ,the drive wheels couldlosetheir
grip. There isan increased dangerofskid-
ding andaccidents.
Do not shift down foradditional enginebrak-
ing onaslippery roadsurface. G
DANGER
If the exhaust pipeisblocked oradequ ate
ventilation isnot possible, poisonous gases
such ascarbon monoxide (CO)mayenter
the vehicle. Thisisthe case, e.g.ifthe vehi-
cle becomes trappedinsnow. Thereisar isk
of fatal injury.
If you leave theengine orthe auxilia ryheat-
ing running, makesuretheexhaust pipeand
area around thevehicle areclear ofsnow. Driving
tips
141Driving andparking
Z

Disp
laymes sages Poss
iblecauses/co nsequences and 0050 0050
Solu tions 003D
Sto pV ehicl eS ee Sto
pV ehicl eS ee
Ope rator'sM anual Ope
rator'sM anual The
battery isno longer bein gcharged and thec ondition ofcharg e
is tool ow.
Aw arning tone also soun ds.
X Pull overand stop thev ehicles afely and switchoff thee ngine,
payin gatten tion toroa dand traff icco nd ition s.
X Se cur ethe veh iclea gain strol linga way (Ypage 134).
X Obs ervethe instruct ionsint he 003D SeeOperator'sM anual See
Operator'sM anual
disp laymes sage .
X Con sult aqualif iedspecialistwor kshop . 00B2
Che ckEngine Oil Che
ckEngine Oil
At NextR efuel ing At
NextR efuel ing The
engin eo illev elhas dropped tothem inimum level.
Aw arning tone also soun ds.
! Av
oid longer journ eys when there isins ufficien te ngineo il.You
co uld other wise damag ethe engin e.
X Chec kthe oillevelwhen next ref uelin g,at thel atest
(Y page 242).
X Ifne cessar y,add engin eo il(Y page 242).
X Hav ethe engin echecked ataq ualif iedspecialistwor kshop ifyou
ne ed toadd engin eo ilmor eoften than usual.
In for mat iononappr ovedengineo ilscan beobt ained from aquali-
fie ds pecial istwor kshop oron theI nterne ta th ttp: //
bev o.mer cedes -ben z.co m. 00B2
Che ckEngine Oil Che
ckEngine Oil
Lev el(Add1q uart) Lev
el(Add1q uart) Mer
cedes -AMG SLC4 3:
The engin eo illev elistool ow.
! Av
oid longer journ eys when there isins ufficien te ngineo il.You
co uld other wise damag ethe engin e.
X Chec kthe oillevelwhen next ref uelin g,at thel atest
(Y page 242).
X Ifne cessar y,add engin eo il(Y page 242).
X Hav ethe engin echecked ataq ualif iedspecialistwor kshop ifyou
ne ed toadd engin eo ilmor eoften than usual.
In for mat iononappr ovedengineo ilscan beobt ained from aquali-
fie ds pecial istwor kshop oron theI nterne ta th ttp: //
bev o.mer cedes -ben z.co m. 00B2
Eng ine OilLevel Eng
ine OilLevel
Low StopV ehicl e Low
StopV ehicl e
Tur nE ngine Off Tur
nE ngine Off Mer
cedes -AMG SLC4 3:
The engin eo illev elistool ow.
The reisar isko fengined amag e.
X Pull overand stop thev ehicles afely and switchoff thee ngine,
payin gatten tion toroa dand traff icco nd ition s.
X Se cur ethe veh iclea gain strol linga way (Ypage 134).
X Chec kthe engin eo illev el(Y page 242).
X Ifne cessar y,add engin eo il(Y page 242). Disp
laymes sage s
197On -boar dcomp uter andd ispla ys Z

Warning/
indic ator
lamp 00510051
Sign altype
Poss iblec ause s/cons equen cesand 0050 0050
Sol utions 00BB
0051
The yellow ESP®
OFF warning lamp islit whi lethe engine isrunning orthe
ECO start/stop functionisactiva ted.
ESP ®
is dea ctivated.
G WARNING
If ESP ®
is swi tched off,ESP ®
is unab leto stabi lizethevehicl e.
Further drivingsystems ordrivi ngsafety systems arethus restricted.
There isan increas edrisk ofskiddi ngand anaccide nt.
X Rea ctivate ESP®
.
In rare cases (Ypag e61)itmay bebest todea ctivate ESP®
.
Observe theimpor tantsafety notesonESP ®
(Y pag e61).
X Adapt yourdrivi ng style tosui tthe road andweather conditions.
If ESP ®
cannot beactiva ted:
X Drive oncarefu lly.
X Have ESP®
checked ataq ualified speci alist worksho p. 0074
0051
Only Mercede s-AMGSLC43:
The yellow SPORT handlingmode warninglamp islit whi lethe engine isrunning.
SPORT handlingmode isactiva ted.
G WARNING
When SPORT handlingmode isswi tched on,ESP ®
is unab leto stabi lizethevehi-
cle.
There isan increas edrisk ofskiddi ngand anaccide nt.
X Only switch toSPORT handlingmode inaccorda ncewith theconditions
descri bedinthe "Activating/d eactivatingESP®
"s ection (Ypag e61). 00490024
0051
0049 (USAonly),0024 (Canada only):the red indica torlamp forthe electric
parki ngbrake flashes orislit and/or theyellow warni nglamp forthe electric
parki ngbrake islit.
X Observe theadditiona ldisp lay messa gesinthe multi function display. 0075
0051
The redrestrai ntsystem warning lamp islit whi lethe engine isrunning.
The restrai ntsystem ismalfu nctioning.
G WARNING
The airbag sorEmergency TensioningDevices mayeither betriggere duninten-
tional lyor, inthe event ofan accide nt,may notbetriggere d.
There isan increas edrisk ofinjury .
X Observe theadditiona ldisp lay messa gesinthe multi function display.
X Drive oncarefu lly.
X Contact aqualified speci alist worksho pand have therestrai ntsystem
checked.
For further informati onabo utthe restrai ntsystem, see(Ypag e39). Indi
cator andwarnin glamps
213On-boardcomput erand displays Z

Engine
Wa
rning/
ind icat or
lam p 00510051
Signa ltyp e
Possi blecauses/cons equences and0050 0050
Solu tions 00B9
0051
The yellow CheckEnginew arning lamp lightsupw hile thee ngine isrun ning.
Ther emaybe am alfunc tion,for exam ple:
R in thee ngine man agem ent
R in thef uel inject ion syst em
R in thee xhaust system
R in thei gn ition syst em
R in thef uel syst em
The emis sion limit values maybeexc eeded andthee ngine may beinemer -
gen cymod e.
X Visi taq ualifi edspec ialist workshop immediat ely.
In som estate s, you must immediat elyvisitaq ualifi edspec ialist workshop as
soon asthey ellow CheckEnginew arning lamp lightsup.This isdue tothel egal
requi rementsine ffect inthese state s.Ifin doubt ,che ck whet hersuchlegal reg-
ulati onsa pply inthes tate inwhic hyou are curren tlydriv ing. 00B6
0051
The yellow reservefuel warn inglamp lightsupw hile thee ngine isrun ning.
The fuel levelhas dro pped intot he res erverange.
X Refuel atthen ear est gas statio n. 00B6
0051
The yellow reservefuel warn inglamp flashes while thev ehicle isin mot ion.
In addit ion,the 00B9 CheckEnginew arning lamp maylight up.
The fuel fillercap isno tc losed correctlyorthef uel syst emisleak ing.
X Chec kthatthe fuel fillercap iscor rectlyclosed.
X Ifth ef uelfiller capisnot corr ectly closed :clo sethef uel fillercap.
X Ifth ef uelfiller capisclosed :visi taq ualifi edspec ialist workshop. 00AC
0051
The redcoolant warn inglamp lightsupw hile thee ngine isrun ningand the
coo lant temper aturegage isat thes tart of thes cale.
The temper aturesensor forthec oolant temper aturegage ismalf unctionin g.
The coolant temper atureisn olon ger bein gmonito red. Thereisar iskofeng ine
damag eifthe coo lant temper atureist oo high .
X Pull overand stop thev ehicle safe lyand switchoff thee ngine ,payin gatten-
tio nt or oad andtraff iccon dition s.Do notc ontin ue driv ingunde rany circum -
st anc es.
X Sec ure thev ehicle again stroll ing away (Ypage 134).
X Con sult aqualifi edspec ialist workshop. 214
Indica
torand warning lampsOn-boar dcomp uter and displa ys

Warning/
indic ator
lamp 00510051
Sign altype
Poss iblec ause s/cons equen cesand 0050 0050
Sol utions 00AC
0051
The redcoola ntwar ning lamp comes onwhi lethe engine isrunning.
The coola ntleve list oo low .
If the coola ntleve lisc orrect, theairflowtothe engine radiator may beblocked
or the electric engineradiator fanmay bedefective .
The coola ntistoo hotand theengine isno longer being coole dsuffi ciently .
X Observe theadditiona ldisp lay messa gesinthe multi function display.
X Pul lover and stop thevehicl esafel yand swi tch offthe engine, paying atten-
tion toroad andtraffic conditions.
X Secure thevehicl eagainst rolling awa y(Ypag e134).
X Leave thevehicl eand keep asafe dista ncefrom thevehicl euntil the engine
has coole ddown.
X Che ckthe coola ntleve land add coola nt,obser vingthewarni ngnotes
(Y pag e243) .
X Ifyou have toadd coola ntfrequ ently, havetheengine coolingsystem
checked.
X Make surethattheairsup plytothe engine radiator isnot blocked ,e.g. by
snow, slush orice.
X Do not start theengine againuntil thecoola nttempera turegage isbel ow the
H marking (Ypag e169) .Otherwi se,the engine couldbedama ged.
X Drive tothe neares tqualified speci alist worksho p.
X Avoid heavyloa dson the engine asyou doso, e.g. drivinginmountai nouster-
rain andstop-and-go traffic. 00AC
0051
The redcoola ntwar ning lamp comes onwhi lethe engine isrunning.
The coola nttempera turegage hasexceede dthe Hmarking (Ypag e169). The
airfl owtothe engine radiator may beblocked orthe coola ntleve lmaybe too
low .
G WARNING
The engine isnot being coole dsuffi ciently andmay bedama ged.
Do not drive when yourengine isoverhe ated.Thiscancaus esome fluidswhi ch
may have leaked into theengine compartment tocatch fire.
Steam fromtheoverhe atedengine canalsoc aus eserio usburns whichcan
occur justbyopeni ngthe hood.
There isar isk ofinjury .
X Observe theadditiona ldisp lay messa gesinthe multi function display.
X Pul lover and stop thevehicl esafel yand swi tch offthe engine, paying atten-
tion toroad andtraffic conditions.
X Secure thevehicl eagainst rolling awa y(Ypag e134) .
X Leave thevehicl eand keep asafe dista ncefrom thevehicl euntil the engine
has coole ddown.
X Che ckthe coola ntleve land add coola nt,obser vingthewarni ngnotes
(Y pag e243).
X Ifyou have toadd coola ntfrequ ently, havetheengine coolingsystem
checked. Indi
cator andwarnin glamps
215On-boardcomput erand displays Z

X
Reac hintot he gap, pullhoodcatch han -
dle 0044upand lifthoo d0043.
If you lifttheh oodb yappr oximat ely15in
(40 cm), theh oodiso pen edand held open
auto maticallyby theg as-filled strut .
Closin gthe hood X
Lowe rthe hoo dand let itfall from aheight
of appr oximat ely8in( 20 cm).
X Chec kthatthe hoo dhasengage dproper ly.
If th eh oodc an be rais edslig htly, itis no t
pro perlyen gage d.Open itagain andcloseit
wit hal ittl em oref orce . Engine
oil
Not eson theo illevel De
pen dingo nyour drivingstyle, thev ehicle
co nsumes upto0.9U Sqt(0.8 lite rs)o fo ilpe r
60 0m iles (1,000 km).Th eo ilco nsumpt ion
may behigh erthan this when thev ehicle is
ne wo rify ou frequen tlydriv eathigh engin e
spee ds.
De pen dingo nthe engin e,theo ildipst ickmay
be inad iffere ntloc atio n.
When check ing theo illeve l:
R park thev ehicle onaleve lsurf ace
R thee ngines hould beswit ched off for
appr oximat elyfivem inute sifthe engin eis
at norm aloper atingtem perat ure
R ifth ee nginei sn otatnorm aloper atingtem -
per atur e,e.g .ift he engin ew asonlystart ed
brie fly,wait about 30min utesbefore carry-
ing out them easurem ent Check
ingtheo illevel usingthe oildip -
st ick G
WAR
NING
Cert aincompo nentsi nt he engin ecom par t-
men t,suc hasthe engin e,radiat orand parts
of thee xhaust system, canbecome very
hot .Workin gint he engin ecom par tment
pose sarisko finjury.
On lytouch thef ollowin gcom ponentsd esc ri-
bed.
If work isbein gcarried outonpublic roads,
pay attentio nt ot he road andtraff icco nd ition s
and secure thea rea asappr opriate . Ex
ample
X Pull outoildipst ick0043.
X Wipe offoildipst ick0043.
X Slo wly slide oildipst ick0043intot he guide
tub etot he stop, and takeito utagain .
If th el eve lisb etween MINmark0087 and
MA Xm ark0044,t heoilleve lisc orrec t.
X Ifth eo illeve lhas dro pped toMIN mark0087
or below, add1.1U Sqt(1l )o fengineo il.
Add ingengine oil G
WAR
NING
Cert aincompo nentsi nt he engin ecom par t-
men t,suc hasthe engin e,radiat orand parts
of thee xhaust system, canbecome very
hot .Workin gint he engin ecom par tment
pose sarisko finjury.
Wher eposs ible, letthee nginec ooldown
and touch onlythec om ponentsd esc ribe din
th ef ollowin g. 242
Engine
compartm entMa intenan ceand care

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