2020 MERCEDES-BENZ SLC ROADSTER battery

Disp
laymes sages Poss
iblecauses/co nsequences and 0050 0050
Solu tions 00AF
Rep laceK eyBat ter y Rep
laceK eyBat ter y The
SmartKey battery isdisc harged.
X Chan getheb atte ry (Y page 69). 00AF
Don 'tForget Your Don
'tForget Your
Key Key The
SmartKey isno tint he ignition lock.You haveopen edthed riv-
er' sd oor withthe engin eswit ched off.
The mult ifunction disp laysho wsthed isplay mes sage amaximum of
60 sec onds and issim plyarem inder.
X Tak ethe Sm artKey withyou when youleavethe veh icle. 00AF
Key NotDetected Key
NotDetected
(re dd isplay mes sage ) The
SmartKey isno tint he veh icle.
Aw arning tone also soun ds.
If th ee nginei ss wit ched off,you can nolonger lockthe veh iclec en-
tr ally orstart thee ngine.
X Pull overand stop thev ehicles afely assoo naspossibl e,payin g
att ention toroa dand traff icco nd ition s.
X Se cur ethe veh iclea gain strol linga way (Ypage 134).
X Loc ate theS martKey.
X Pre ss0076 onthes teer ing whee ltoc onfirmt hedisp laymes -
sage . Be
caus ethere isint erf ere ncef romas tron gs our ceofradi owaves,
th eS martKey isno td etec tedw hilstthe engin eisr unnin g.
Aw arning tone also soun ds.
X Pull overand stop thev ehicles afely assoo naspossibl e,payin g
att ention toroa dand traff icco nd ition s.
X Se cur ethe veh iclea gain strol linga way (Ypage 134).
X Inser tthe Sm artKey intot he ignition locka nd bring intok ey
mod e. 00AF
Key NotDetected Key
NotDetected
(whit edisplay mes sage ) The
SmartKey iscur ren tlyu ndetec ted.
X Chan gethel oc ati on oftheS martKey inthev ehicle.
If th eS martKey still can notb ed etec ted:
X Inser tthe Sm artKey intot he ignition locka nd turnittot he
des iredp osition . 00AF
Rem ove 'Start'B ut‐ Rem
ove 'Start'B ut‐
ton andInsert Key ton
andInsert Key The
SmartKey isco ntinu ally undetec ted.
KE YLE SS-GO istempo rarily malf unction ing orisdef ective. Aw arn-
ing tone also soun ds.
X Inser tthe Sm artKey intot he ignition locka nd turnittot he
des iredp osition .
X Vis itaq ualif iedspecialistwor kshop . 208
Disp
laymes sage sOn -boar dcomp uter andd ispla ys

Socket
inthe front center console X
To open: pushthelower section of
cover 0043.
The stowage compartmen topens.
X Lift upthe cover ofsocket 0044. Mercedes
meconne ct
General notes Al
icense agreement mustbeinplace inorder
to activate theMercedes meconn ectservice.
Make surethatyour system isactivated and
operational. Toregister, pressthe00D9 MB
Info callbutton. Ifany ofthe steps mentioned
are not carried out,thesystem maynotbe
activated.
If you have questions abouttheactivation,
cont actone ofthe following telephone hot-
lines:
R USA: Mercedes-B enzCustomer Assistance
Center at1-80 0-FOR-MERCedes
(1-80 0-367-6372)or1-86 6-990-9007
R Canada: Customer Serviceat
1-88 8-92 3-8367
Short lyafter successfully registeringwiththe
service, auser IDand password willbesent to
you bypost.
USA only: youcan usethis password tolog
onto theMercedes meconn ectarea under
"Owners Online"athtt <0053001D00120012005A005A005A001100500045005800560044001100460052
0050>.
The system isavaila bleif:
R ithas been activated andisoperational
R the correspondin gmobile phone network is
availa blefortransm ittingdatatothe Cus-
tomer Center
R as ervice subscription isavaila ble
R the starter battery issufficiently charged i
Determ iningthelocation ofthe vehicle on
am apisonly possible if:
R GPS reception isavaila ble
R the vehicle position canbeforwarded to
the Customer AssistanceCenter
The Mercedes meconne ctsystem To
adjust thevolume duringacall, proceed as
follows:
X Press the0081 or0082 button onthe multi-
funct ionsteering wheel.
or X Use thevolume controller ofthe audio sys-
tem/COMA ND.
The system offersvarious services, e.g.:
R Automatic andmanual emergency call
R Roadsid eAssistanc ecall
R MB Info call
USA only: youcan find information anda
description ofall availa blefeatures under
"Owners Online"athttp: //www.mbusa.com.
System self-test Aft
eryou have switched onthe ignition, the
system carriesoutaself-diagnosis.
Am alfunction inthe system hasbeen detec-
ted ifone ofthe following occurs:
R The indicator lampinthe SOS button does
not come onduring thesystem self-test .
R The indicator lampinthe 0052 Roadsid e
Assistanc ebutton doesnotlight upduring
self-diagnosis ofthe system.
R The indicator lampinthe 00D9 MBInfo call
button doesnotlight upduring self-diagno-
sis ofthe system.
R The indicator lampinone ormore ofthe fol-
lowing buttons continues tolight upred
after thesystem self-diagnosis:
- SOS button
- 0052 Roadsid eAssistanc ecallbutton
- 00D9 MBInfo callbutton
R Aft erthe system self-diagnosis, theInoper‐ Inoper‐
ative ative
orService NotActivated Service
NotActivated mes-
sage appears inthe multifunct iondisplay .
If am alfunction isindicated asoutlined above,
the system maynotoperate asexpected. In
the event ofan emergency, helpwillhave to
be summoned byother means. Features
231Stowageandfeatu res 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

X
To reduc ethe tire pres sure :de pre sspre s-
su re release button 0043next topre ssu re
ga ge 0044.
X Whe nthe tire pressu reiscorr ect, unscrew
the fillerh osef rom thevalve ofthe sealed
tire .
X Screw thevalve cap onto thetire valve of
the sealedt ire. X
To rem ove thetire sealant bottle from the
tire inflation comp ressor ,press toge ther the
lo cking tabsonthe yellow cap .
X Pu llthe tire sealant bottle outo fthe tire
infl ation comp ressor .
The fillerh oser em ains atta chedtothe tire
sea lant bottle .
X Driv etot he nea restqualifi ed spe cialist
wo rksh opand have the tire changed there.
X Hav ethe tire sealant bottle and thefiller
hos ereplaced assoo naspossibl ea ta
qu alifi ed spe cialist wo rksh op.
X Hav ethe tire sealant bottle replaced every
fou ryears at aq ualifi ed spe cialist wo rksh op. Battery
(vehi cle) Impo
rtant safetynotes
Spe cialtool sand exp ertknow ledge are
req uired when working onthe battery ,e.g.
rem ovaland installatio n.Yo us houldt her efore
ha ve allw orki nvo lving the battery carriedo ut
at aq ualifi ed spe cialist wo rksh op. G
WAR
NING
Wor kcarrie do utinco rrectly onthe battery
can lead ,for exa mpl e,to as hortcirc uita nd
thu sdam aget he veh iclee lectro nics .This
can lead tofunc tionr estricti onsapplying to
sa fety -releva ntsystem s,e.g .the lighti ng
sy stem ,the ABS (anti-l ock braking system )
or the ESP ®
(El ectro nicStab ility Pro gram).
The opera ting safety ofyour veh iclem aybe
res tricte d.
Yo uc ouldlose contro lofthe veh icle, for
exa mpl e:
R wh en bra king
R in the eventofabrupt stee ring maneu vers
and /or when the vehicle's spe edisnot
ad apted tothe roadcond itions
The reisar isko fana ccident.
In the eventofas hortcirc uito ra simil ar
inci dent, conta ctaq ualifi ed spe cialist wo rk-
sho pimm ediatel y.Do not drive any further .
Yo us houldh avea llwo rkinvo lving the bat-
tery carriedo utataq ualifi ed spe cialist
wo rksh op.
For further informa tiona bout ABS andESP®
,
see (Ypage 57)and (Ypage 60). G
WAR
NING
Ele ctros taticbuild -u pc an lead tothe crea -
tio no fspa rks, which cou ldignite thehighl y
exp losive gases ofab attery .The re isar isk
of an exp losion.
Befo rehandl ing the battery ,tou ch the vehi-
cle body torem ove anyexisting electro static
bu ild-u p.
The highl yflamma bleg asmixtu reform swhen
cha rging the battery aswellas when jump -
sta rting . 25
8 Battery
(vehi cle)Breakdo wnassis tan ce

Alw
aysm akes uret hatn either youn orthe bat-
tery iselectro statica llyc harge d.Ab uild -u po f
el ectro static cha rge can becau sed,for exa m-
pl e:
R by wearing clothing ma de from syntheti c
fib ers
R du et ofrictio nbetwe en clothing and seats
R ifyo up usho rpullt he battery across the
car peto ro the rsyntheti cmateri als
R ifyo uw ipet he battery with ac loth G
WA
RNING
Dur ing the charging pro ces s,ab attery pro-
du ces hydro gen gas.Ifas hortcirc uito ccu rs
or spa rks arec rea ted ,the hydro gen gasc an
ig nite .The re isar isko fane xplosion.
R Ma kesure tha tthe positive term inalofa
conne ctedbattery does not come into
conta ctwith veh iclep arts.
R Nev erplace meta lobjects ortool sona
ba ttery .
R Itis imp orta nttha tyou obser vethe
de scri bedo rder ofthe battery terminals
wh en conne ctinganddisconne ctingabat-
tery .
R Whe njum p-sta rting,makes uret hatthe
ba ttery polesw ithi de nti cal polarity are
conne cted.
R Itis pa rticu larly imp orta ntto obser vethe
de scri bedo rder wh en conne ctinganddis-
conne ctingthejumperc ables.
R Nev erconne ctor disconne ctthe battery
term inalswh ilet he eng ineisrunning . G
WA
RNING
Batte ryaci disc austic.The reisar isko f
inju ry.
Avoi dconta ctwith ski n,eyes orclo thing. Do
not inhalea nybattery gases .Don otlean
ove rthe battery .Keepc hild ren away from
ba tteri es.Washaway battery acidimm edi-
ate lywith plenty ofcle an water and seek
med icalatte ntio n. H
En
viron men talnote Batte
riesc onta inpo lluta nts.
It is ille ga ltod ispo se of
them with the household
ru bb ish. The ym ustb ec ol-
le cted separate lyand dis-
po sed ofinan envi ronm en-
tal lyres ponsi bler ecy cling
sy stem . Dis
pose ofbatteri esinan
envi ronm entallyr espo nsi ble
ma nner. Take discha rged
ba tteri estoaq ualifi ed spe -
cia list wo rksh oportoac ol-
le ctio npoint for used bat-
teri es.
! Hav
ethe battery regular ly che cked ata
qu alifi ed spe cialist wo rksh op.
Co mpl ywitht he ser vice intervalsin the
Ma inte nance Booklet,or conta ctaq ualifi ed
spe cialist wo rksh opfor more informa tion.
! Alw
aysh avew orko nb atteri escar riedo ut
at aq ualifi ed spe cialist wo rksh op.
Shou ldit, inexce ptiona lcirc um stances ,be
ab sol ute lynece ssaryto disconne ctthe 12-
vol tbattery yoursel f,plea se obser vethe fol-
lo wi ng:
R Secu rethe vehiclet op revent itfrom roll-
ing away.
R Swi tch offthe igniti on.
R Dis conne ctthe negative term inalfirst and
then thepositive term inal.
The trans mission islocked inpo sitio n005D
afte rdisconne ctingthebattery .
After theworkhasb eend one,ins tallthe
ba ttery andreplace the cove rofthe positive
term inalclamp firmly .
Co mpl ywiths afety precau tions and take pro-
tecti vemea sures when handl ing batteri es. Ri
sk ofexp losion. Fir
e,op en flames andsmoking are
pro hibi ted when handl ing the bat-
tery .Avoi dc rea ting sparks. Battery
(vehi cle)
259Breakdo wnassis tan ce Z

Battery
acidisc austic. Avoid con-
tact with skin, eyes orcloth ing.
Wea rsuitabl eprote ctive clothing,
esp ecia llyg loves, apron and face-
gu ard .
Ri nse anyacids pillsi mme diatel y
wi th clea rwater. Contact aphysi-
cia nifn eces sary. Wea
reye prote ction. Kee
pchildre naway. Obs
erve thisOperator'sManu al.
For safety reasons, Merce des-Benz recom -
mends thatyouo nly use batterie swhich hav e
bee ntested andapprov edfor your vehi cleby
Merce des-Benz. Thesebatterie sprov ide
incre asedimp act prote ction topre vent vehicle
occu pants from sufferi ngacidb urns shou ld
the battery bedamag edinthe eventofan
acci dent.
In orde rfor the battery toachi evethemaxi -
mum possibleserv icelife, itmus talway sb e
suf ficiently charged.
Like other batterie s,the vehi clebattery may
di scha rgeover time ifyo ud on otuse thevehi -
cle. Inthis case ,havet he battery disconnec-
ted ataq ualifi ed spe cialist wor kshop .You can
al so char gethe battery with ac har ger recom -
mende dbyM erce des-Benz. Contact aquali-
fie ds pecia list wor kshop forfurth erinfor ma-
tion.
Have thebattery condi tionofchar gechecke d
more frequently ifyo uu sethe vehi clemai nly
for shor ttrip so rify ou leaveitstand ingidle
for aleng thy period.Consul taq ualifi ed spe -
cia list wor kshop ifyo uw isht oleave your vehi -
cle parked foralong period oftime .
Re move theSmartKe yify ou park the vehi cle
and donot require any electrica lconsu mers .
The vehiclewillthen usevery little energ y,
thus conser vingbattery power. If
the pow ersup plyh asbee ninterr upted, e.g.
if yo ur econne ctthe battery ,you willhav eto:
R rese tthe functi onfor automa ticallyf oldi ng
the exteri ormirr orsin/ou tbyfoldi ng the
mirr orsouto nce (Ypage 93)
R set the clock
On vehi cles with am ultimed iasystem, the
time isset automa tically. Charg
ingthe battery G
WARNI
NG
Duri ngchar ging andjump -starti ng,expl osive
ga ses can esca pefrom thebattery .The re is
ar isk ofan expl osion.
Pa rticu larly avo idfire ,ope nf lames, creating
spa rks and smoki ng.Ensure thereissuf fi-
cient ventilation whi lechar ging andjump -
starti ng.Donot leano ver abattery . G
WARNI
NG
Battery acidisc austic. Thereisar isk of
inju ry.
Avoid contact with skin, eyes orcloth ing.Do
not inha leany battery gases .Don otlea n
over thebattery .Keepc hildre nawayfrom
ba tterie s.Wa shaway battery acidimme di-
atel ywithp lenty ofclea nwater and seek
med icalattenti on. G
WARNI
NG
Ad ischa rged battery canfreezeattempe ra-
ture sbelow free zing point. Whe njump -start-
ing the vehi cleorchar ging thebattery ,
ga ses can esca pefrom thebattery .The re is
ar isk ofan expl osion.
All ow the frozen battery tothaw outb efore
char ging itor jump -starti ng.
! Only
usebattery chargers with am aximum
char ging voltage of14.8 V.
! On
lycha rge the battery using the jump -
star ting connecti onpoint.
The jump -starti ngconnecti onpointisin the
engi necomp artme nt. 260
Battery
(vehi cle)Breakdo wnassi stanc e

If
the indicator/wa rninglampsdon otlight up
at low temperature s,itis very likely thatthe
discha rgedbattery hasfrozen. Inthis case,
you may neither chargethebattery norjump-
start thevehicle .The service lifeofat hawed -
out battery maybeshorter. Thestarting char-
acteristics canbeimpa ired, particul arlyatlow
temperature s.Have thethawed -outbattery
checked ataq ualifie dspecia listworkshop.
Rea dthe battery charger's operatinginstruc-
tions before charging thebattery.
X Open thehood.
X Connect thebattery charger tothe positive
terminal andground pointinthe same order
as when connecting thedonor battery inthe
jump-starting procedure(Y page 261). Replaci
ngthe 12Vb attery
Observe thenotes onthe 12Vb attery
(Y page 258).
Mercedes-Benz recommendsthatyouhave
the 12Vb attery replacedataq ualifie dspe-
ciali stworkshop, e.g.atan authori zed
Mercedes-Benz Center. If
you want torepla cethe battery yourself,
observe thefollow ingnotes:
R Alway srepla cead efective batterywitha
battery whichmeets thespecific require-
ments ofthe vehicle .
The vehicle isequi pped withanAGM
(Absorbent GlassMat) technology battery.
Full vehicle functionality isonly guaranteed
with anAGM battery. Forsafety reasons,
Mercedes-Benz recommendsthatyouonly
use batteries whichhavebeen tested and
appro vedforyou rvehicle byMercedes-
Benz.
R Use detachab leparts suchasbreather
hoses, angled connecting piecesorterminal
covers fromthebattery whichisto be
repla ced.
R Make surethatthevent hose isalw ays con-
nected tothe origina lopening onthe bat-
tery side.
R Install existing orsupp liedcellcaps topre-
vent gases orbattery acidfrom escapi ng.
R Make surethatthedetachab leparts are
connected againinthe same way. Jump-star
ting
For thejump-starting procedure,use only thejump-starting connectionpointinthe engine com-
partment, consisting ofap ositive terminal andaground point. G
WARNING
Battery acidiscaustic. Thereisar isk ofinjury.
Avoid contact withskin, eyesorclothing. Donot inhal eanybattery gases.Don otlea no ver the
battery. Keepchildre nawayfrom batteries. Washawaybattery acidimmedi atelywithplenty of
clean water andseek medica lattention. G
WARNING
During charging andjump-starting, explosivegases canescape fromthebattery. Thereisa
risk ofan explosi on.
Particul arlyavoid fire,open flames ,creating sparksandsmoking. Ensurethereissufficie nt
ventilation whilecharging andjump-starting. Donot leano ver abattery. G
WARNING
During thecharging process,abattery produceshydro gengas. Ifas hort circuit occurs or
sparks arecreated, thehydro gengascan ignite. Thereisar isk ofan explosi on. Jump-st
arting
261Breakd owna ssis tance
Z