2019 MERCEDES-BENZ SL ROADSTER engine coolant

Problem
Possible
causes/co nsequences and0050 0050
Solutions The
engine isnot run-
ning smoothly andis
misfiring. There
isamalfunction inthe engine electron icsorinamechanical
componen tof the engine management system.
X Only depress theaccelerator pedalslightly.
Otherwise, non-combusted fuelmay getinto thecatalytic con-
verter anddamage it.
X Have thecause rectified immediately ataqual ified specialist
workshop. 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 267). 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 289)andthenotes ontowing with
both axles onthe ground (Ypage 289). DYNAMIC
SELECTbutt on(all vehi-
cles except Mercedes-AMG vehicles)
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
R the steering
R the curve tilting function(vehicles with
Act ive Body Control)
R the cont rolthresholds ofESP ®
Each timeyoustart theengine withtheSmart-
Key orthe Start /Stopbutton, driveprogram C
is activated. Furtherinformation aboutstartin g
the engine (Ypage 127).
Each timeyoustart theengine withtheSmart-
Key, drive program Cis activated. Further
information aboutstartin gthe engine
(Y page 127). 132
DY
NAMIC SELECTbutt on(all vehicl esexce ptMercedes-AMG vehicles)Driving andparking

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 Using 0064or0063, select theEasy Easy
Entry/Exit Entry/Exit
function.
If the Easy Entry/Exit Easy
Entry/Exit functionisactiva-
ted, themultifunc tiondisplay showsthe
steerin gwheel inorange.
X Press the0076 button tosave thesetting.
Further informationonthe EASY-E NTRY/EXIT
feature (Ypage 103).
Switching theseat beltadjustm ent
on/off
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
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 44).
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 105), theywillnotfold 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 vehicles)
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. 202
Menus
andsubmenusOn-board computerand display 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 146).
X Con sult aqualifi edspec ialist workshop. Wa
rning and indicat orlam ps
239On-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 126).
On vehicle swith KEYLESS- GO,press the
Start/St opbutton twice(Ypage 126).
X Check thecoolant temperature gageinthe
multifu nctiondisplay.
The coolant temperature mustbebelow
158 ‡(70 †).
X Turn theSmartKey topositio n0092
(Y page 126)inthe ignition lock. X
Slowl yturn cap0044half aturn counter-clock-
wise toallow excess pressureto escape .
X Turn cap0044further <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 0043.
If the coolant levelisappro ximately 0.6in
(1.5 cm)above marker bar0087inthe filler
neck when warm, thereisenough coolant in
expansion tank0043.
X Ifnecessary ,add coolant thathasbeen tes-
ted and appro vedbyMercedes-Benz.
X Repl acecap 0044and turn itclockwise asfar
as itwil lgo.
Further information oncoolant (Ypage 324).
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. 268
Eng
inecompar tmentMaintenanc eand care

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 231).
Further information onwindshield washer
fluid/antifreeze (Ypage 325). Overview
ofthe engine compart -
ment Example
engine
0043 Oildipstick
0044 Brake fluidreservoir
0087 Engin eoil cap
0085 Coolant expansion tank
0083 Washer fluidreservoir 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 266).
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. ASSY
STPLUS
269Maintenance andcare Z

data
isdifferen tfor every vehicle andcan
deviate fromthedata shown here.Youcan
find thedata applicable toyour vehicle on
the vehicle identification plate. Vehicle
identification number(VIN) X
Move thefron t-passenger seatasfar back
as possible.
X Fold upfloor cover ing0043infron tof the
fron t-passenger seat.
You willsee VIN 0044.
The VINcanalso befound inthe following
location s:
R on the lower edgeofthe windshield
(Y page 321)
R on the vehicle identification plate
(Y page 320) Engine
number 0043
Emiss ioncontrol infor mation plate,includ-
ing the cert ification ofboth federal and
Californian emissionsstan dards
0044 Engine number (stamped intothe cran k-
case)
0087 VIN (onthe lower edgeofthe windshield) Service
product sand filling capaci-
ties Impor
tantsafet ynotes G
WARN
ING
Serv iceproduct smay bepoisonous andhaz-
ardous tohealth. Thereisarisk ofinjury.
Comply withinstruct ions onthe use, storage
and disposal ofservic eproduct son the
labels ofthe respect iveoriginal container s.
Always storeservic eproduct ssealed intheir
original container s.Always keepservic e
product sout ofthe reach ofchildren . H
Environm
entalnote
Dispose ofservic eproduct sin an envir on-
ment allyrespon siblemann er.
Serv iceproduct sinclude thefollowing:
R Fuels
R Lubrican ts(e.g. engin eoil, tran smission oil)
R Coolant
R Brak efluid
R Windshield washerfluid
R Climate control system refrigerant
Comply withallvalid regulation swith respect
to handling, storing, and disposing ofservic e
fluids.
Componen tsand servic eproduct smust
matc h.You should therefore onlyuseproduct s
that have been testedand approved by
Mercedes -Benz.
Inf ormat ionabout testedand approved prod-
ucts canbeobtained fromanauthoriz ed
Mercedes -BenzCenter oron the Internet at
htt p:// bevo.m ercedes- benz.com.
You canident ifyserv iceproduc tsapprove dby
Merc edes- Benzby the followin ginsc riptions
on the contain er:
R MB- Freigabe (e.g.MB-Freigabe 229.51)
R MB- Appr oval(e.g. MB-Appr oval229.51)
Oth erdesign ationsor rec omme ndations indi-
cat ealevel ofquality oraspecif ication in
acco rdanc ewith anMB Shee tNumber (e.g.
MB 229 .51). They have notnecessarily been
approve dby Merc edes- Benz. Serv
iceproduct sand filling capacities
321Technical data Z

The
coolant isamixt ureofwater andanti-
freeze/ corrosion inhibitor.Itis responsible for
the following:
R anti- corrosion protection
R antifr eezeprotec tion
R raising theboiling point
If the coolant hasantifr eezeprotec tiondown
to -35 ‡(-37 †),theboiling pointofthe cool-
ant during operation isapproximately 266‡
(130 †).
The antifr eeze/c orrosion inhibitorconcentra-
tion inthe engine cooling systemshould:
R be atleast 50%.Thiswillprotec tthe engine
cooling systemagainst freezingdown to
approximately -35‡(-37 †).
R not exceed 55%(antifreez eprotec tiondown
to -49 ‡[-45 †]). Otherwise, heatwillnot
be dissipated aseffect ively.
If the vehicle haslost coolant, addequal
amounts ofwater andantifr eeze/c orrosion
inhibitor.
Mercedes- Benzrecomm endsanantifr eeze/
corrosion inhibitorconcentrateinaccordanc e
with MBSpecific ationsforServic eProducts
310. 1.
i When
thevehicle isfirst delivered, itis fil-
led with acoolant mixturethat ensures ade-
quate antifreezeandanti- corrosion protec-
tion.
i The
coolant ischeck edwith every mainte-
nanc einter valataqualified specialist work-
shop.
Fillin gcapacities Missing
valueswerenotavailabl eat time of
going toprint. Model Capacity
SL
450 Approx
.10.8 USqt
(10.2 l) SL
550 Approx.
12.5USqt
(11.8 l) Merce
des‑AMG
SL 63 Merce
des‑AMG
SL 65 Approx.
10.5USqt
(10 l) Windshi
eldwashe rsyste m
Important safetynotes G
WARNING
Winds hieldwa sher concentrate ishigh ly
flam mabl e.Ifwind shieldwa sher concentrate
gets onto hotcomponents ofthe engine or
the exhau stsyste m,itcan ignite. Thereisa
risk offire and injury .
Make surethatwind shieldwa sher concen-
trate isnot spilled inthe vicinity ofthe filler
neck.
! Only
usewasher fluidwhi chissui tabl efor
lam plense s,e.g. MBSummerFi tor MB Win-
terFit. Unsuitablewa sher fluidmay dama ge
the lamplense sof the headlamps.
! Only
MBSummerFi tand MBWinterFit
wa sher fluidshou ldbe mixed together. The
spra ynozzles mayotherw isebecome
blo cked.
Do not use disti lledor de-io nized water. Other-
wis e,the leve lsensor maygiveafals eread ing.
When handlingwasher fluid,obse rvethe
impo rtant safetynotes onservice products
(Y pag e321) .
At tempera turesabovefreezing:
X Fill the washer fluidreservo irwith amixture
of wa ter and wind shieldwa sher fluid,e.g.
MB SummerFi t.
X Add 1part MBSummerFi tto 100 parts
wa ter.
At tempera turesbelow freezing:
X Fill the washer fluidreservo irwith amixture
of wa ter and washer fluid,e.g. MBWinterFit.
For thecorrect mixingratiorefer tothe
informa tiononthe antifree zereservo ir.
i Add
wind shieldwa sher fluid,e.g. MBSum-
merFit orMB WinterFit, tothe washer fluid
all yea rround. Servi
ceproducts andfilling capaci ties
325Techn ical data Z