2020 MERCEDES-BENZ SL CLASS cooling

Overview
ofclimat econtrol systems General
notes
Observe thesettings recom mended onthe fol-
lowing pages. Thewindows couldotherwise
fog up.
To preven tthe windows fromfogging up:
R switch offclimate control only briefly
R switch onair-rec irculation modeonlybriefly
R switch onthe cooling withairdehumidifica-
tion function
R switch onthe defrost windshield function
briefly, ifrequired
Climate control regulates thetemper atureand
the humidity inthe vehicle interiorand filters
undesirable substancesout ofthe air. Climate
control can only beoperated whenthe
engin eis runn ing.Optimum operation isonly
achieved withtheside windows androof
closed.
i When
theweather iswarm, ventilate the
vehicle forabrief period. Thiswillspeed up
the cooling process andthedesired vehicle
inter iortemper aturewillbereached more
quickly.
i It
is possible thatthedehumidification
func tion ofthe climate control system may
be activat edautomatic allyanhour after the
Smart Keyhasbeen removed. Thevehicle is
then ventilated for30minut estodry the air-
con ditionin gsystem. Control
panelfordua l-zone automat icclimat econtrol Canada
only
0043 Setsthe temper ature,left(Ypage 119)
0044 Setsclimate control toautomatic (Ypage 119)
0087 Defr osts thewindshield (Ypage 120)
0085 Switc hestheresidual heatonoroff (Ypage 122)
0083 Switc hescooling withairdehumidification on/off(Ypage 118)
0084 Switc hestherear window defrosteron/ off(Ypage 121)
006B Switc hestheZONE function on/off(Ypage 120)
006C Setsthe temper ature,right(Ypage 119)
006D Activates/ deactivat esclimate control (Ypage 118)
006E Setsthe airdistribut ion(Ypage 120)
006F Setsthe airflow (Ypage 120) 116
Overview
ofclimat econtrol systemsClimatecontrol

R
Use theresidua lheat function ifyou want to
heat orventilate thevehicle interior when
the ignition isswitched off.The residua l
heat function canonly beactivated ordeac-
tivated withtheignition switched off.
R Vehicles withCOMAND: ifyou change the
settings ofthe climate controlsystem, the
climate statusdisplayappea rsfor three sec-
onds atthe bottom ofthe screen inthe
COMAND display.You willsee thecurrent
settings ofthe various climate controlfunc-
tions.
ECO start /stop function During
automatic engineswitch-off, thecli-
mate controlsystem onlyoperates ata
reduced capacity. Ifyou require fullclimate
cont rolcapacity, theECO start/st opfunction
can bedeactivated bypressing theECO but-
ton (Ypage 130). Operating
theclimate controlsys-
tems Activating/
deactivating climatecon-
trol
General notes When
theclimate controlisswitched off,the
air suppl yand aircirculation arealso switched
off. The windows couldfogup.Therefore,
switch offclimate controlonly briefly
i Act
ivate climate controlprimarily usingthe
0058 button (Ypage 119). Activating/
deactivating X
Turn theSmartKey toposition 0048inthe igni-
tion lock (Ypage 126).
X To activate: pressthe0058 button.
The indicator lampinthe 0058 button lights
up. Airflow andairdistribution aresetto
automatic mode.
or
X Press the0078 button.
The indicator lampinthe 0078 button goes
out. Thepreviousl yselected settingsare
restored.
X To deactivate: pressthe0078 button.
The indicator lampinthe 0078 button lights
up. Switchin
gcoo ling with airdehumidi-
fication on/off
General notes If
you deactivate the"Cool ingwith air-dehu-
midification" function,theairinside thevehicle
will notbecooled. Theairinside thevehicle
will also notbedehumid ified.Thewindows can
fog upmore quickly. Therefore, deactivate the
cooling withair-dehumi dificationfunctiononly
briefly .
The "Cool ingwith airdehumid ification" func-
tion isonly available when theengine isrun-
ning. Theairinside thevehicle iscooled and
dehumid ifiedaccording tothe temperature
selected.
Condensation maydripfrom theunderside of
the vehicle whenitis in cooling mode.Thisis
normal andnotasign thatthere isamalfunc-
tion.
Activating/ deactivating X
To activate: pressthe005A button.
The indicator lampinthe 005A button lights
up.
X To deactivate: pressthe005A button.
The indicator lampinthe 005A or0056 but-
ton goes out.The"Cool ingwith airdehumid -
ification" functionhasadelay edswitch-off
feature.
The indicator lampinthe 005A button goes
out. The"Cool ingwith airdehumid ification"
function hasadelay edswitch-off feature. 118
Operat
ingthe climat econ trol systemsCli mat eco ntrol

Problems
withthe"Cool ingwith airdehum idification" function Problem
Possible
causes/co nsequences and0050 0050
Solutions The
indicator lampin
the 005A button flashes
three times orremains
off. The "Cooli ngwith
air <00470048004B00580050004C0047004C0049004C004600440057004C00520051
0005[
funct ioncannot be
switched on. Cooling
withairdehumidification hasbeen deactivated duetoa
malfunction .
X Visit aquali fiedspecialist workshop. Setting
climate controltoautom atic
General notes In
automatic mode,thesettemperature is
maintained automatically ataconst antlevel.
The system automatically regulatesthetem-
perature ofthe dispensed air,the airflow and
the airdistribution.
The automatic modefunctionsoptimally when
the "Cooli ngwith air<00470048004B00580050004C0047004C0049004C004600440057004C00520051
0005[ func-
tion isactivated. Ifnecessary, coolingwithair
dehumidification canbedeactivated.
If you deactivate the"Cooli ngwith air-dehu-
midification" function,theairinside thevehicle
will notbecooled. Theairinside thevehicle
will also notbedehumidified .The windows can
fog upmore quickly. Therefore, deactivate the
cooling with<0044004C0055001000470048004B00580050004C0047004C0049004C00460044
0057004C00520051[ functiononly
briefly.
Automat iccontrol X
Turn theSmartK eytoposition 0048inthe igni-
tion lock (Ypage 126).
X Set thedesired temperature.
X To activate: pressthe0058 button.
The indicator lampinthe 0058 button lights
up. Automatic airdistribution andairflow are
activated.
i When
automatic modeisenabled, thecli-
mate mode canbeselected (Ypage 119).
X To switch tomanua lmode: pressthe
008F button.
or X Press the0095 or0097 button.
The indicator lampinthe 0058 button goes
out. Adjust
ingthe climate modesettings
You canselect thefollowing climatemodeset-
tings inautomatic mode:
FOCUS highairflow, slightlycoolersetting
MEDI UMmedium airflow,standard setting
DIFF USE lowairflow, slightlywarmer and
draft-f reesettin g
X Turn theSmartK eytoposition 0048inthe igni-
tion lock (Ypage 126).
X Press the0058 button.
X Press the00F0 button repeatedly untilthe
desired climatemodeappears inthe dis-
play . Setting
thetemp eratu re
Setting thetemp eratu re Differen
ttemperatures canbeset forthe driv-
er's andfront -passenger sides.
X Turn theSmartK eytoposition 0048inthe igni-
tion lock (Ypage 126).
X Turn control0043 or0044 counter -clockwiseor
clockwise.
Only change thetemperature settingin
small incremen ts.Start at72 ‡(22 †).
i If
you turn controls0043and 0044counter -
clockwise tothe lowest temperature setting,
<0044004C00550010005500480046004C005500460058004F00440057004C0052
0051[ modemayswitch onauto-
matically, depending onthe outside temper-
ature. Operat
ingthe climate controlsystems
119Climat econ trol

MAX
COOLmaximum cooli ng
The MAX COOL function isonly available in
vehicl esfor the USA.
MAX COOL isonly opera tional whenthe
engine isrunning.
X To activate :press the00C9 button.
The indica torlamp inthe button lights up.
X To deactiv ate:press the00C9 button.
The indica torlamp inthe button goesout.
The previ ouslysele cted settings are
restored .
When youactiva teMAX COOL, climatecontrol
swi tches tothe followi ngfunctions:
R maximu mcooli ng
R maximu mairfl ow
R air-re circul ation mode on Removi
ngcondens ationfromthe
wi ndow s
Windo wsfogg edup onthe inside X
Activate the005A coolingwith airdehu midi-
ficatio nfunction.
X Activate the0058 mode button.
X Ifthe windo wscontinue tofog up,activa te
the 0064 "Windshie lddefros ting"function.
i You
shou ldonly selectthis setting untilthe
winds hieldis clea raga in. Windo
wsfogg edup onthe outside X
Activate thewinds hieldwip ers.
X Press the008F button repeatedlyuntilthe
009C or009B symbolapp ears inthe disp lay.
i You
shou ldonly selectthis setting untilthe
winds hieldis clea raga in. Rear
window defroste r
Gene ralnote s The
rear windo wdefros terhas ahigh current
draw .You shou ldtherefore switch itoff as
soon asthe rear windo wisclea r.Otherwi se,
the rear windo wdefros terswitches offauto-
matica llyafter severa lminutes.
If the battery voltageis too low,the rear win-
dow defros termay switch off.
Ac tivating /deactivating X
Turn theSmartKey toposi tion 0048inthe igni-
tion lock (Ypag e126).
X Press the006C button.
The indica torlamp inthe 006C button lights
up orgoes out.
Probl emswith the rear window defroste r Probl
em Poss
iblecause s/cons equen cesand 0050 0050
Sol utions The
rear windo w
defros terhas deactiva-
ted prema turelyor can-
not beactiva ted. The
on-board voltageis too low becau setoo many electrical con-
sume rsare switched on.
X Switch offany consumers thatarenot requ ired,e.g. read ing
lamp s,interior lighting orthe seat heating.
When thebattery issuffi ciently charged,the rear windo w
defros tercan beactiva tedagain. Operating
theclimate control systems
121Climate control

Switching
air-recirculation mode
on/off
General notes If
you switch on<0044004C00550010005500480046004C005500460058004F00440057004C0052
0051[ mode,the
windows canfogupmore quickly, inparticular
at low temperatures. Onlyuse<0044004C00550010005500480046004C005500460058004F00440057004C0052
0051[
mode briefly toprevent thewindows fromfog-
ging up.
<002400460057004C005900440057004C0051004A001200470048004400460057
004C005900440057004C0051004A> X
Turn theSmartK eytoposition 0048inthe igni-
tion lock (Ypage 126).
X To activate: pressthe0072 button.
The indicator lampinthe 0072 button lights
up.
i Air-r
ecirculation modeisautomatically
activated athigh levels ofpollution orat
high outside temperatures. Whenair-recir-
culation modeisactivated automatically,
the indicator lampinthe 0072 button isnot
lit. Outside airisadded afterabout
30 minutes.
X To deactivat e:press the0072 button.
The indicator lampinthe 0072 button goes
out.
i Air-r ecirculation modedeactivates auto-
matically:
R after approximately fiveminutes atout-
side temperatures belowapproximately
41 ‡(5 †)
R after approximately fiveminutes ifcooling
with airdehumidification isdeactivated
R after approximately 30minutes atoutside
temperatures aboveapproximately 41‡
(5 †) ifthe "Cooli ngwith airdehumidifi-
cation" functionisactivated Switching
theresidual heatonoroff
General notes The
residual heatfunct ionisonly availa bleon
vehicles forCanada.
It is possible tomake useofthe residual heat
of the engine tocont inue heating thestation-
ary vehicle forupto30 minutes afterthe
engine hasbeen switched off.The heating
time depends onthe setinterior temperature. <002400460057004C005900440057004C0051004A001200470048004400460057
004C005900440057004C0051004A> X
Turn theSmartK eytoposition 0092inthe igni-
tion lock orremove it(Y page 126).
X To activate: pressthe004B button.
The indicator lampinthe 004B button lights
up.
i The
blower willrun atalow speed regard-
less ofthe airflow setting.
i If
you activate theresidual heatfunct ionat
high temperatures, onlythevent ilation will
be activated. Theblower runsatmedium
speed.
X To deactivat e:press the004B button.
The indicator lampinthe 004B button goes
out.
Residu alheat isdeactivated automatically:
R after approximately 30minutes
R when theignition isswitched on
R ifthe battery voltage drops Setting
theairvents Import
antsafety notes G
WARNING
Very hotorvery cold aircan flow from the
air vent s.This could result inburns orfrost-
bite inthe immediate vicinityofthe air
vent s.There isarisk ofinjury.
Make surethatallvehicle occupants always
maintain asufficient distancetothe airout-
lets. Ifnecessary, redirecttheairflow to
another areaofthe vehicle interior. G
WARNING
When AIRSCARF isswitched on,very hotair
can flow from thevent sin the head
restraint s.This could result inburns inthe
immediate vicinityofthe airvent s.There isa
risk ofinjury.
Reduce theheater output beforeitbecomes
too hot. 122
Setting
theairventsClimat econ trol

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

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

repla
cement confirmed inthe Maintenance
Booklet. Co
olan t
Important safetynotes G
WARNING
If antifreeze comesintocontact withhot
components inthe engine compartment, it
may ignite. Thereisarisk offire and injury.
Let the engine cooldown before youadd
antifreeze. Makesurethatantifreeze isnot
spil led next tothe filler neck. Thorou ghly
clea nthe antifreeze fromcomponents
before starting theengine.
! Only
addcoola ntthat hasbeen premixe d
with thedesi redantifreeze protection. You
could otherwi sedama gethe engine.
You canfind additional notesonthe coola nt
in the follo wing places:
R in the Mercede s-BenzSpecifica tionsfor
Service Products,MBBeVo 310.1
- on the Internet at
<004B005700570053001D00120012004500480059005200110050004800550046
0048004700480056[ -benz.com
- on the Mercede s-BenzBeVoapp
R aqua lified specia lizedworkshop
! Alwa
ysuse asui table coolantmixture,
even incountries wherehightempera tures
preva il.
Otherwi se,the engine coolingsystem isnot
suffi ciently protected fromcorrosio nand
overhea ting.
i Have
thecoola ntregu larlyrepla cedata
qua lified specia listworkshop andthe
repla cement confirmed inthe Maintenance
Booklet.
Comp lywith theimporta ntsafety notesfor
service productswhen handlingcoola nt
(Y pag e324) .
The coola ntisamixture ofwater andanti-
freeze/corrosi oninhib itor.Itis responsi blefor
the follo wing:
R anti-corrosio nprotection
R antifreeze protection
R rais ingthe boiling point If
the coola nthas antifreeze protection down
to -35 ‡(-37 †),theboiling point ofthe cool-
ant duri ngopera tionisapp roximatel y266 ‡
(130 †).
The antifreeze/corro sioninhib itorconcentra-
tion inthe engine coolingsystem should:
R be atlea st50% .This willprotect theengine
cooli ngsystem against freezing downto
app roximatel y-35 ‡(-37 †).
R not exceed 55%(antifree zeprotection down
to -49 ‡[-45 †]). Otherwi se,heat willnot
be dissi pated aseffectivel y.
If the vehicl ehas lost coola nt,add equal
amou ntsofwater andantifreeze/corro sion
inhib itor.
Mercede s-Benzrecommends anantifreeze/
corrosio ninhib itorconcentrate inaccorda nce
with MBSpecifica tionsforService Products
310.1.
i When
thevehicl eis first delivered, itis fil-
led with acoola ntmixture thatensures ade-
qua teantifreeze andanti-corrosio nprotec-
tion.
i The
coola ntischecked withevery mainte-
nance interval ataqua lified specia listwork-
shop.
Fil lin gcapaci ties Missi
ngvalu eswere notavailable attime of
going toprint. Model Capaci
ty SL
450 Approx.
10.8USqt
(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) 32
8 Service
products andfilling capacitiesTechnical data