2020 MERCEDES-BENZ SLC maintenance

Engine
compartm ent Hood
Imp ortant safety notes G
WAR
NING
If th eh ood isunlat ched, itmay open up
when thev ehicle isin mot ionand blockyour
view. Thereisar iskofan acc iden t.
Nev erunlat chtheh ood while driving.Before
ever ytrip, ens ure that theh ood isloc ked. G
WAR
NING
When openingand closingthe hood ,itm ay
sudde nlyfall intot he closed posit ion.Ther e
is ar isk ofinjury topers onsw ithinran geof
mov emen tofthe hood .
Open andclosetheh ood onlywhen noone
is with inits ran geofmov emen t. G
WAR
NING
Open ingtheh ood when thee ngine isove r-
heat edorwhen there isaf irei nt he eng ine
com partmen tcoul de xpose you tohot gases
or other servicep roduct s.Ther eisar iskof
inj ury.
Let anove rheatedengine coo ldown before
open ingtheh ood .Ift he re isaf irei nt he
eng inecom partmen t,ke ep theh ood closed
and contactthe fired epar tment . G
WAR
NING
The enginecom partmen tcontain smoving
com ponents.Cert aincom ponents,suc has
th er adiat orfan ,maycon tinue torun orstart
again sudde nlywhen thei gn ition isoff .
Ther eisar iskofinjury.
If you needtod oanywork inside thee ngine
com partmen t:
R swit choff thei gn ition
R nev erreac hintot he area wherethere isa
risk ofdang erfrom mov ingcom ponents,
suc hasthe fan rotatio narea R
rem ove jewelry andwatc hes
R ke ep items ofclo thing and hair, forexam -
ple, away from mov ingpart s
To ens ure thef low offresh airthroug hthe air
ven tsint ot he veh icle interio r,please observe
th ef ollowin gnotes :(Ypage 115)
Open ingtheh ood G
WAR
NING
Cert aincom ponentsint he eng inecom part-
men t,suc hasthe eng ine,radiat orand parts
of thee xhaust system, canbecome very
hot .Workin gint he eng inecom partmen t
pose sariskofinjury.
Wher eposs ible, letthee ngine coo ldown
and touch onlythec om pon entsdesc ribe din
th ef ollowin g. G
WAR
NING
When theh ood isopen andthew indshie ld
wiper sareset inmot ion,you can beinjured
by thew iper linkage. Thereisar iskofinjury.
Always switchoff thew indshie ldwiper sand
th ei gn ition befo reopen ingtheh ood .
! Mak
esure that thew indshie ldwiper sare
no tfold ed away from thew indshie ld.You
coul dotherwise damag ethe wind shieldwip-
ers ortheh ood . X
Mak esure that thew indshie ldwiper sare
tur ned off.
X Pull release lever0043 ontheh ood .
The hood isrele ased. Engine
compartm ent
241Maintenance andcare 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 of1U Sqt
(1 liter), amessage appears inthe multifunc-
tion display prompting youtoadd washer fluid
(Y page 207).
Further information onwindshield washer
fluid/antifreeze (Ypage 304). Overview
ofthe engine compart -
ment Example
engine
0043 Engin eoilcap
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 242).
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 conditionsofthe
vehicle, theremaining timeordistance until
the next service duedate isdisplay ed.
The letter A A
or B B,p
ossibly inconn ection witha
number oranother letter,shows thetype of
service. A A
stands foram inor service andB B
for
am ajor 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. ASSY
STPLUS
245Maintenance andcare Z

Maintaining
thetime-dependent servicesched-
ule:
X Note down theservice duedate display edin
the multifunction displaybeforedisconnec t-
ing the battery.
or X Aft erreconn ectingthebattery, subtract the
battery disconnec tionperiods fromtheser-
vice date shown onthe display . Hiding
service displays
X Press the0076 or0038 button onthe steer-
ing wheel. Showing
servicedisplays
X Switch onthe ignition.
X Press 0059or0065 onthe steering wheel
to select theServ. Serv.
menu.
X Press 0063or0064 toselect theASSYST ASSYST
PLUS PLUS
submenu andconfirm bypressing the
0076 button.
The service duedate appears inthe multi-
funct iondisplay . Informat
ionabout Service
Resetting theASSYST PLUSservice
interval display !
If
the ASS YST PLUS service interval dis-
play hasbeen inadvertent lyreset, thisset-
ting canbecorrect edataq ualified special-
ist workshop.
Have service workcarried outasdescribed
in the Maintenanc eBooklet. Thismay other-
wise leadtoincreased wearanddamage to
the major assemblies orthe vehicle.
Aq ualified specialist workshop, e.g.anauthor-
ized Mercedes-Ben zCenter, willreset the
ASS YST PLUS service interval displayafterthe
service workhasbeen carried out.Youcan
also obtain further information onmainte-
nance work,forexample. Special
servicerequirements The
specified maintenanc einterval takesonly
the normal operation ofthe vehicle into
account. Serviceworkwillneed tobe per-
formed moreoften ifthe vehicle isoperated
under arduou scondition sorincreased loads.
The ASSYST PLUS service interval displayis
only anaid. Thedriver ofthe vehicle isrespon-
sible forwhether serviceworkwillneed tobe
performed morefrequently thanrequired asa
result ofthe actual operating conditions
and/or loads.
Examples ofarduou soperating condition s:
R regular citydriving withfrequent intermedi-
ate stops
R the vehicle isprimarily usedtotravel short
distances
R frequent useinmountainous terrainoron
poor roadsurfaces
R the engine isoften leftidling forlong peri-
ods
R particularly dustycondition s,or ifair-recir-
culation modeisfrequently used
In these orsimilar operating conditions,have
the interior filter,airfilter, engine oiland oilfil-
ter, forexample, changedmorefrequently.
Under arduou soperating condition s,the tires
must becheck edmore often. Further informa-
tion canbeobtained ataq ualified specialist
workshop.
Driving abroad An
exten siveMercedes-Ben zService network
is also availa bleinother countr ies.You can
obtain further information fromanyauthorized
Mercedes-Ben zService Center. Care
Notes
oncare H
Environmental
note
Dispose ofempty packaging andcleaning
cloths inan environm entallyresponsible
manner.
! When
cleaning yourcar,donot use:
R dry, coarse orhard cloths
R abrasive cleaningagents 246
CareMaintenance
andcare

R
solvents
R cleaning agentscontaining solvents
Do not scrub.
Do not touch thesurfaces andfilms with
hard objects, e.g.rings orice scrapers. Oth-
erwise, youmay scratch ordamage thesur-
faces andfilms.
! Do
not park yourvehicle foralong period
of time directly aftercleaning, particularly
after cleaning thewheel rimwith wheel
cleaner. Wheelcleaner canlead tothe
increased corrosionofthe brake discsand
pads. Therefore, driveforafew minutes
after cleaning. Byheating upthe brakes, the
brake discsandpads dry.Thevehicle can
then beparked foralong period oftime.
Regu larcare ofyour vehicle isac ondition for
retaining thequal ityinthe long term.
Use care products andcleaning agentsrecom-
mended andapproved byMercedes-Benz . Washing
thevehicl eand cleani ng
the paintwork
Automatic carwash G
WARNING
Braking efficiency isreduced afterwashing
the vehicle. Thereisar isk ofan accident.
Aft erthe vehicle hasbeen washed, brake
carefully whilepayingattent iontothe traffic
conditions untilfullbraking poweris
restored.
! When
DISTRONIC PLUSorthe HOLD func-
tion isactivated, thevehicle brakesauto-
matically incertain situations.
To avoid damage tothe vehicle, deactivate
DISTRONIC PLUSandtheHOLD function in
the followi ngorsimilar situations:
R when towing thevehicle
R in the carwash
! It
is preferable touse carwashes with
adjustable high-pressure pre-cleaningthat
corresponds tothe specification forthe
Cabri oletprogram. Incar washes thatuse
high water pressures, thereisar isk that a
small amount ofwater mayleakintothe
vehicle. !
Lock
thecarifyou wash itin an automatic
car wash. Otherwise, thevehicle mightbe
damaged .
! Never
cleanyourvehicle inaT ouchless
Automatic CarWash asthese usespecial
cleaning agents.Thesecleaning agentscan
damage thepaintwork orplastic parts.
If you have yourvehicle cleaned inah igh-
pressure automatic carwash, small
amounts ofwater mayenter thevehicle.
! Make
surethattheautomatic transmission
is in position Nwhen washing yourvehicle
in at ow-through carwash. Thevehicle could
be damaged ifthe transmission isin another
position.
! Make
surethat:
R the side windows androof arecompletely
closed
R the climate controlblower isswitched off
R the windshiel dwiper switch isin position
0
The vehicle mayotherwise bedamaged .
You canclean thevehicle atan automatic car
wash fromthevery start.
Preferably cleanthevehicle atautomatic car
washes thatusetextilewashing elements
without brushes. Thisprevents finescratches
from forming onthe paintwork andfilm.
If the vehicle isvery dirty, pre-wash itbefore
cleaning itin an automatic carwash.
Aft erusing anautomatic carwash, wipeoff
wax from thewindshiel dand the wiper blades.
This willprevent smearsandreduce wiping
noises caused byresidue onthe windshiel d.
i Vehicles
withdecorative film:select a
wash program withouthotwax atthe auto-
matic carwash.
Washing byhand In
some countries, washingbyhand isonly
allow edatspeciall yequip ped washing bays.
Observe thelegal requirements ineach coun-
try.
X Do not use hotwater anddonot wash the
vehicle indirect sunlight.
X Use asoft sponge toclean.
X Use amildcleaning agent,suchasac ar
shampoo approved byMercedes-Benz . Care
247Maintenance andcare Z

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 jetnozzle (dirt
blasters) cancause invisible exteriordam-
age tothe tires orchassis compon ents.
Component sdamaged inthis way may fail
unexpect edly.There isar isk 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 sbec ompletely
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. 248
CareMaintenance
andcare

Clean
ingthev ehi cle parts
Clean ingthew heels G
WAR
NING
The wate rjet from acircular jetn ozzle (dirt
blast ers)can caus einvisible exterior dam-
age tothet ires orchassis components.
Comp onents damag edinthis way may fail
une xpectedly. Thereisar isko fana cciden t.
Do notu se power washerswit hc ircular jet
no zzles tocle an thev ehicle .Haved amag ed
tir es orchassis components repl aced imme-
diat ely.
! Do
notu se acid icwheel cleanin gproduct s
to rem ove brak edust .This coul ddamag e
wheel boltsand brak ecom pon ents.
! Do
notp ark your vehicle foralon gp eriod
of tim edirectly aft ercle anin g,part icular ly
aft ercle anin gthe wheel rimwithw heel
cle ane r.Whee lcleane rcan lead tothe
inc reas edcor rosion oftheb rak ediscsa nd
pads. Therefore, driv efor afew min utes
aft ercle anin g.By heat inguptheb rak es, the
brak ediscsa nd pads dry.Thevehicle can
th en be park edfor alon gp eriod oftim e.
Clean ingthew indows G
WAR
NING
You couldbecome trapped bythew ind-
shie ldwiper sifthe ys tart mov ingwhile
cle anin gthe wind shieldor wiper blades .
Ther eisar isko finjury.
Always switchoff thew indshie ldwiper sand
th ei gn ition bef ore cleanin gthe wind shield
or wiper blades .
! Do
notu se dry cloths, abras iveproduct s,
solv ents or cle anin gagen tscon tain ingsol-
ven tsto cle an thei nside ofthew indows. Do
no ttou ch thei nsides ofthew indows with
hard object s,e.g .anice scrape rorring.
Ther eiso therwise arisko fdamag ingthe
wind ows.
! Clean
thew aterdrain age chann elsofthe
wind shieldand ther ear wind owatreg ular
int erv als. Deposi tssuc hasleave s,pet als
and polle nmayunde rcertain circum stanc es prev
entw ate rfromd rain ingaway. Thiscan
lead tocor rosion damag eand damag eto
elec tron iccom ponents.
X Clean thei nside and outside ofthew indows
wit had amp clothand acleanin gproduct
th at isrec omm ended andappro vedby
Mer cedes-Ben z.
Clean ingwiper blades G
WAR
NING
If th ew indshie ldwiper sareset inmot ion
while youarecleanin gthe wind shield,you
can betrapped bythew iper arm.Ther eisa
ris ko finjury.
Always switchoff thew indshie ldwiper sand
th ei gn ition bef ore cleanin gthe wind shield.
! Do
notp ull thew iper blade. Other wise, the
wiper bladecouldbedamag ed.
! Do
notc lean wiper blades tooo ften and
do notrub them tooh ard .Otherwise, the
grap hitec oatin gc oul db edamag ed.This
coul dcaus ewiper noise.
! Hol
dthe wiper armsecurely when folding
back .The wind shieldcoul dbedamag edif
th ew iper arm smac ksagain stitsudde nly.
X Fol dthe wind shieldwiper armsaway from
th ew indshie ld.
X Caref ullyclean thew iper blades witha
damp cloth.
X Fol dthe wind shieldwiper armsback again
bef ore swit ching onthei gn ition .
Clean ingthee xteri or ligh ting !
On
lyuse cleanin gagen tsor cle anin g
clo thst hata re suit able forplast iclen ses .
Caust ic,irritan toro therwise unsuitab le
cle anin gagen tsor cle anin gcloth sc oul d
sc rat ch ordamag ethe exterior light ingplas-
tic lenses .
X Clean thep last iclen ses ofthee xteri or light s
wit haw etspon geand amildcleanin g
agen t,e.g .M erced es-Ben zcarsham pooor
cle anin gcloth s. 250
Car
eMaintenance andcare

Clean
ingthem irror turn signa ls !
On
lyuse cleanin gagen tsor cle anin g
clo thst hata re suit able forplast iclen ses .
Un suit able cleanin gagen tsor cle anin g
clo thsc oul dscratch ordamag ethe plast ic
len ses ofthem irror turns ign als.
X Clean thep last iclen ses ofthem irror turn
sign alsinthee xteri or mir ror hous ingusin ga
wet spon geand mild cleanin gagen t,e.g .
Mer cedes-Ben zcarsham pooorwit hc lean-
ing cloths.
Clean ingthes ensor s !
If
you clean thes ensor sw ithap ower
washe r,mak esure that you keep adistanc e
of at least 11.8in(30 cm)betwe en the vehi-
cl ea nd thep ower washer nozzle. Infor ma-
tio na bout thec orrec tdistanc eisa vailabl e
fr om thee quipm entman ufacturer. X
Clean sensors0043 ofthed riving syst ems
with water,car sham pooandasoftc loth .
Cleani ngther earv iew cam era !
Do
notc lean thec am era lensand thea rea
aroun dthe rear view camerawith apower
washer . X
Open thec am era flap (Ypage 160).
X Use clean wate rand asoftc loth to cle an
cam eralens0043.
The cam eraflap closes:
R ifth ei gn ition isswit ched off
R ifth ec am era syst emisdeac tivate d
R start ing atveh icle spee dsabov e6.2mph
(10 km/h)
Cleani ngthee xha ust pipe G
WAR
NING
The exhaust tailpipe andtailpipe trim can
bec ome veryhot.Ify ou com eintoc ontac t
with these partsofthe veh icle,you coul d
burn yours elf.Ther eisar iskofburn s.
Always bepart icular lycar eful andsuper vise
ch ildre nclosely aroun dthe exh aust pipeand
th ee xhaust pipetrims. Allowthese com po-
nen tsto coo ldown beforetouchi ngthem.
! Do
notc lean thee xhaust pipewithacid-
based cleanin gagen ts,s uc ha sbathro om
cle aner orwheel cleaner .
X Clean thee xhaust pipewithachrom ecare
prod ucttested and appro vedbyMer cedes-
Ben z.
Imp urities com bined with thee ffect sofroad
grit and corrosive env iron men talfactors may
caus eflash rusttofor mo nthe surf ace. You
can restore theo riginal shineofthe exh aust
pipe bycleanin gitreg ularly, especially inwin-
te ra nd afterwashin g. Car
e
251Maintenance andcare Z

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