2020 MERCEDES-BENZ SL CLASS radiator

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 270). 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 292)andthenotes ontowing with
both axles onthe ground (Ypage 292). DYNAMIC
SELECTcontroller General
informat ion
Select thedrive program usingtheDYNAMIC
SELE CTcont roller. Available
driveprogra ms: I
Individual Individual
settings C
Comfort Comfort-
oriented, opti-
mum-econ omyengine and
transmission settings S
Sport Sporty
engine andtrans-
mission settings S+
Sport Plus Particularly
sportytrans-
mission settings Race
Maximum
sportiness and
engine andtransmission
settin gssuitable forthe
racetrack Depending
onthe drive program selected the
following vehiclecharacterist icswill change:
R the drive (engine management)
R the transmission management
R ESP ®
R the suspension
R the steering 132
DY
NAMIC SELECTcontrolle rDrivingandparking

Warning/
indic ator
lamp 00510051
Sign altype
Poss iblecause s/cons equen cesand 0050 0050
Sol utions 00AC
0051
The redcoola ntwar ning lamp comes onwhi lethe engine isrunning.
The coola ntleve lis too low.
If the coola ntleve lis correct, 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 laymessa gesinthe multi function display.
X Pul lover andstop thevehicl esafel yand switch offthe engine, paying atten-
tion toroad andtraffic conditions.
X Secure thevehicl eaga inst rolling awa y(Y pag e147).
X Leave thevehicl eand keep asafe dista ncefrom thevehicl euntil theengine
has coole ddow n.
X Che ckthe coola ntleve land add coola nt,obser vingthewarni ngnotes
(Y pag e270) .
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 e193) .Otherwi se,the engine couldbe dama ged.
X Drive tothe neares tqua lified 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 e193). The
airfl owtothe engine radiator may beblocked orthe coola ntleve lmay betoo
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 canalsocaus eserio usburns whichcan
occur justbyopeni ngthe hood.
There isarisk ofinjury .
X Observe theadditiona ldisp laymessa gesinthe multi function display.
X Pul lover andstop thevehicl esafel yand switch offthe engine, paying atten-
tion toroad andtraffic conditions.
X Secure thevehicl eaga inst rolling awa y(Y pag e147) .
X Leave thevehicl eand keep asafe dista ncefrom thevehicl euntil theengine
has coole ddow n.
X Che ckthe coola ntleve land add coola nt,obser vingthewarni ngnotes
(Y pag e270).
X Ifyou have toadd coola ntfrequ ently, havetheengine coolingsystem
checked. Indi
cator andwarnin glamps
243On-boardcomput erand displays Z

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 e193) ,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 e157).
Further informati onon Active BrakeAssist (Ypag e63).
Further informati onon Active BrakeAssist withcross-traffic function
(Y pag e70) . 244
Indi
cator andwarni nglampsOn-bo ardcomput erand displays

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 e269) .
Further informati ononengine oil
(Y pag e327) . 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 . 270
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 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 328).
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
271Maintenanc eand care
Z

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 e324) .
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. Cli
mate control syste mrefrige rant
Important safetynotes The
clima tecontrol systemof you rvehicl eis
fill ed with refrig erant R‑134a .
The instructio nlab elrega rding therefrig erant
type usedcan befound onthe radiator cross
membe r.
! Only
therefrig erant R‑134a andthePAG
oil app roved byMerced es-Benz maybe
use d.The approved PAGoilmay notbe
mixed withanyother PAGoilthat isnot
app roved forR-134a refrigerant. Otherwi se,
the clima tecontrol systemmay bedam-
age d.
Service work,suchasrefil ling with refrig erant
or repl acing component parts,mayonlybe
carrie dout byaqua lified speci alist worksho p.
All app licable regu lations, aswel las SAE
standa rdJ639, mustbeadh ered to.
Alwa yshave work onthe clima tecontrol sys-
tem carrie dout ataqua lified speci alist work-
shop.
Refrige rantinstruction label Example
:refrig erant instructio nlab el
0043 Symbo l
0044 Refri gerantfilling capa city
0087 Appli cablestanda rds
0085 PAG oilpart numbe r
0083 Typeof refrig erant
Symbo ls0043 advi seyou about:
R Possi bledange rs
R Having service workcarrie dout ataqua li-
fied speci alist worksho p Servi
ceproducts andfilling capaci ties
329Techn ical data Z