2019 MERCEDES-BENZ SLC ROADSTER engine

Warning/
indic ator
lamp 00510051
Sign altype
Poss iblecause s/cons equen cesand 0050 0050
Sol utions X
Make surethattheairsup plytothe engine radiator isnot blocked ,e.g. by
snow, slush orice.
X Ifthe coola nttempera turegage isbel ow the Hmarking (Ypag e168) ,drive
on tothe next qualified speci alist worksho p.
X Avoid heavyloa dson the engine asyou doso, e.g. drivinginmountai nouster-
rain andstop-and-go traffic. Drivi
ngsystems Warning/
indic ator
lamp 00510051
Sign altype
Poss iblecause s/cons equen cesand 0050 0050
Sol utions 00BA
0051
The reddista ncewarning lamp lights upwhi lethe vehicl eis in motion. A
war ning tone alsosound s.
You areapproachi ngavehicl e,apede strian orastationa ryobstacl ein you rline
of travel attoo high aspee d.
X Be prepa redtobrake immed iately.
X Pay carefu lattention tothe traffic situation. Youmay have tobrake ortake
evasi veaction.
Further informati onon Active Distance AssistDISTRONIC (Ypag e144).
Further informati onon Active BrakeAssist (Ypag e58). Warning
andindic atorlamps
215On-boardcomput erand displays Z

i
When
driving athigh speeds withtheside
window orroof open:
If you have insert edacar park ticketinto
retainin gstrip 0087,make surethatitis not
blown awaybythe wind. Ashtr
ay X
To open: pushthelower sectionof
cover 0043.
The cover opens.
X To remove theinsert: liftinsert 0087up0044
and out.
X To re-inst allthe insert: pressinsert 0087
into theholder untilitengages. Cigarett
elighter G
WARNIN
G
You canburn yourself ifyou touch thehot
heating element orthe sock etofthe ciga-
rett elighter.
In addition, flammable materialscanignite
if:
R the hot cigarett elighter falls
R achild holds thehot cigarett elighter to
object s,for example
There isarisk offire and injury.
Always holdthecigarett elighter bythe
kn ob. Always makesurethatthecigarett e
lighter isout ofreach ofchildren. Never
leave children unsupervised inthe vehicle. Your
attentionmust alway sbe focused onthe
traff iccondit ions.Onlyusethecigarett e
lighter whenroadandtrafficcondit ionsper-
mit.
X Turn theSmart Keytoposition 0048inthe igni-
tion lock (Ypage 118).
X To open: pushthelower sectionof
cover 0043.
The ashtray opens.
X Press incigarett elighter 0044.
Cigarette lighter0044will pop outautomati-
cally when theheating element isred-hot . 12
Vsockets
General notes X
Turn theSmart Keytoposition 0047inthe igni-
tion lock (Ypage 118).
The sock etscan beused foraccessor ieswith
a maximum drawof180 W(15 A).Acc essories
include suchitems aschargers formobile
phones.
If you usethesock etsforlong periods when
the engine isswitched off,thebatter ymay dis-
charge.
i An
emergen cycut- out ensures thattheon-
board voltage doesnotdrop toolow. Ifthe
on- board voltage istoo low, thepower to
the sock etsisautomatically cut.This
ensures thatthere issufficien tpower to
start theengine. Featur
es
229Stowage andfeatures Z

Engine
compartm ent Hood
Imp ortant safety notes G
WAR
NING
If th ehood isunlat ched, itmay open up
when theveh icle isin mot ionand blockyour
view. Thereis arisk ofan acc iden t.
Nev erunlat chthehood while driving.Bef ore
ever ytrip, ens ure that thehood isloc ked. G
WAR
NING
When openingand closingth ehood ,it may
sudde nlyfall intoth eclo sed posit ion.Ther e
is arisk ofinjury topers onswith inran geof
mov emen tof thehood .
Open andclosethehood onlywhen noone
is with inits ran geofmov emen t. G
WAR
NING
Open ingthehood when theeng ineisove r-
heat edorwhen there isafir ein theeng ine
com partmen tcoul dexp ose you tohot gases
or other servicepro duct s.Ther eis arisk of
inj ury.
Let anove rheatedeng inecoo ldown before
open ingthehood .If th ere isafir ein the
eng inecom partmen t,ke ep thehood closed
and contactth efir edepar tment . G
WAR
NING
The enginecom partmen tcon tain smov ing
com ponents.Cert aincom ponents,suc has
th eradiat orfan ,may continue torun orstart
again sudde nlywhen theign ition isoff .
Ther eis arisk ofinjury.
If you needto do any work inside theeng ine
com partmen t:
R swit choff theign ition
R nev erreac hint oth earea whereth ere isa
risk ofdang erfrom mov ingcom ponents,
suc has thefan 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 theflow offresh airthroug hth eair
ven tsint oth eveh icle interio r,please observe
th efoll owin gno tes: (Y page 115)
Open ingthehood G
WAR
NING
Cert aincom ponentsin theeng inecom part-
men t,suc has theeng ine,radiat orand parts
of theexh aust system, canbecome very
hot .Wor kingin theeng inecom partmen t
pose sa risk ofinjury.
Wher eposs ible, lettheeng inecoo ldown
and touch onlythecom ponentsdesc ribedin
th efoll owin g. G
WAR
NING
When thehood isopen andthewind shield
wiper sare setinmot ion,you can beinjured
by thewiper linkage. Thereis arisk ofinjury.
Always switchoff thewind shieldwiper sand
th eign ition befo reopen ingthehood .
! Mak
esure that thewind shieldwiper sare
no tfold edaway from thewind shield.You
coul dot her wise damag eth ewind shieldwip-
ers orthehood . X
Mak esure that thewind shieldwiper sare
tur ned off.
X Pull release lever0043 onthehood .
The hood isrele ased. 240
Engine
compartm entMa intenance andcare

X
Reac hint oth egap, pullhoodcat chhan -
dle 0044upand lifthoo d0043.
If you liftthehoo dby appr oximat ely15in
(40 cm), thehoo dis open edand held open
auto maticallyby thegas- filled strut .
Closin gth ehood X
Lowe rth ehoo dand letitfall from aheig ht
of appr oximat ely8in (20 cm).
X Chec kth at thehoo dhas engage dpro perly.
If th ehoo dcan berais edslig htly, itis no t
pro perlyen gage d.Open itagain andcloseit
wit halit tle mor efor ce. Engine
oil
Not eson theoil level De
pen dingon your drivingstyle, theveh icle
co nsumes upto0.9US qt(0.8 lite rs)of oilpe r
60 0mi les(1 ,000 km).Th eoilco nsumpt ion
may behigh erthan this when theveh icle is
ne wor ifyou frequen tlydriv eat high engin e
spee ds.
De pen dingon theen gin e,theoil dipst ickmay
be inadiff ere ntloc atio n.
When check ing theoil leve l:
R park theveh icle onaleve lsurf ace
R theen gin esho uld beswit ched off for
appr oximat elyfivemin utesif th een gin eis
at norm aloper atingte mpe rature
R ifth een gin eis no tat norm aloper atingte m-
per atur e,e.g .if th een gin ewas onlystart ed
brie fly,wait about 30min utesbef ore carry-
ing out themeas urement Check
ingtheoil level usingth eoil dip -
st ick G
WAR
NING
Cert aincompo nentsin theen gin eco mpar t-
men t,suc has theen gin e,radiat orand parts
of theex haust system, canbecome very
hot .Wor kingin theen gin eco mpar tment
pose sa ris kof injury.
On lytouch thefoll owin gco mpo nentsdesc ri-
bed.
If work isbein gcar ried outonpublic roads,
pay attentio nto theroad andtraff icco nd ition s
and secure thearea asappr opriate . Ex
ample
X Pull outoildipst ick0043.
X Wipe offoildipst ick0043.
X Slo wly slide oildipst ick0043intoth eguide
tub eto thest op, and takeit out again .
If th eleve lis bet ween MINmark0087 and
MA Xmar k0044, theoil leve lis co rrect .
X Ifth eoil leve lhas dropped toMIN mark0087
or below, add1.1US qt(1l)of engin eoil.
Add ingengine oil G
WAR
NING
Cert aincompo nentsin theen gin eco mpar t-
men t,suc has theen gin e,radiat orand parts
of theex haust system, canbecome very
hot .Wor kingin theen gin eco mpar tment
pose sa ris kof injury.
Wher eposs ible, lettheen gin eco ol down
and touch onlytheco mpo nentsdesc ribedin
th efoll owin g. Engine
compartm ent
241Maintenan ceand care Z

G
WARNING
If engine oilcomes intocontact withhot
components inthe engine compartment, it
may ignite. Thereisarisk offire and injury .
Make surethatengine oilisnot spilled next
to the filler neck. Letthe engine cooldown
and thoroug hlyclea nthe engine oiloff the
components beforestarting theengine. H
Envi
ronmental note
When addingoil,take carenottospil lany. If
oil enters thesoil orwate rways,itis harmfu l
to the environment.
! Use
only engine oilsand oilfilters thatare
app roved forvehicl eswith aservice system.
A list ofthe engine oilsand oilfilters that
have been tested andapproved inaccord-
ance withMercede s-BenzSpecifications for
Service Productsisava ilable atany author-
ized Mercede s-BenzCenter.
The followi ngcaus eengine failure ordam-
age tothe exhau stsystem:
R Use ofengine oilsand oilfilters thathave
not been express lyapp roved forthe ser-
vice system
R Rep lace ment ofengine oiland oilfilter
after thereplacement intervalspecified
by the service system hasexpire d
R Use ofengine oiladd itives
! Do
not add toomuch oil.If the oilleve lis
abo vethe "ma x"mark onthe dipstick, too
much oilhas been added. This canleadto
dama getothe engine orthe catal yticcon-
verter. Haveexcess oilsiph oned off. Example
:engine oilcap X
Turn cap0043counter-clockwi seand remove
it.
X Add engine oil.
If the oilleve lis at or bel ow the MIN mark
on the oildip stick, add1.1USqt(1.0 liter)
of engine oil.
X Rep lace cap0043onthe filler neck andturn
clockwis e.
Ensure thatthecap locks intoplace
secure ly.
X Che ckthe oilleve laga inwith theoildip stick
(Y pag e241) .
Further informati ononengine oil
(Y pag e300) . Che
ckin gand adding otherservice
products
Che ckin gco olan tlev el G
WARNING
Certa incomponents 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 followi ng. G
WARNING
Opening thehood when theengine isover-
hea ted orwhen thereisafire inthe engine
compartment couldexpose youtohot gase s
or other service products.There isarisk of
injury .
Let anoverhe atedengine cooldownbefore
openi ngthe hood. Ifthere isafire inthe
engine compartment, keepthehood closed
and contact thefire depa rtment. G
WARNING
The engine compartment containsmoving
components. Certaincomponents, suchas
the radiator fan,may continue torun orstart
aga insud denly whentheignitio nis off.
There isarisk ofinjury . 242
Eng
inecompar tmentMainten anceandcare

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

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 edataqual ified special-
ist workshop.
Have service workcarried outasdescribed
in the Maintenanc eBooklet. Thismay other-
wise leadtoincreased wearanddamage to
the major assemblies orthe vehicle.
A qual ified 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 sor increased 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 conditions:
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 conditions,the tires
must becheck edmore often. Further informa-
tion canbeobtained ataqual ified 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 Care
245Maintenance andcare Z