2017 MERCEDES-BENZ S-CLASS CABRIOLET engine overheat

&
WARNING Danger of bu rnsw hen open‐
ing theb onnet
If yo uo pen thee ngine bonn etwhen the
engine has overheated or during afireint he
engine compartment, youc ould come into
contact wit hhotgases or other escaping
operating fluids. #
Befor eopening theb onnet ,allowt he
engine tocool down. #
Inthee vent of afireint he engine com‐
partment, keep thee ngine bonn et
closed and cal lthe fire service. Overvie
wofthe buttons on thes teering
wheel 1
¤ Backbutton, on-boar dcomputer
2 Touc hC ontrol, on-boar dcompu ter
3 Control panel forc ruisec ontrol/limiter or
Ac tiveD ista nce Assi stDISTRONIC
4 Control panel form ultimedia sy stem:
£ LINGU ATRO NIC or voice control sys‐
tem
ß Displaysf avo urites
VO L: control knob, adjusts thev olume or
switches thes ound off 8
6 Makes/accepts acall ~
Rejects/end sacall
5 ò Callsupt he home screen
6 Touc hC ontrol
7 % Backbutton Overvie
wofdisplaysinthem ultifunction
display 1
Outside temp erature
2 Driv eprogram
3 Transmission position
4 Time
5 Displa ysection Instrument Displa
yand on-boar dcomputer 219

Opening/closing
theb onnet &
WARNING Risk of accident du etodriv‐
ing wit hthe engine bonne tunlo cked
An unloc kede ngin ebonn etma yopen up
when thev ehicle is in motion and bloc kyour
vie w. #
Neveru nloc kthe engine bonne twhen
driving. #
Befor eevery trip, ensur ethat the
engine bonn etis loc ked. &
WARNING Risk of accident and inju ry
when opening and closing thee ngine
bonn et
When opening or closing thee ngine bonn et,
it ma ysuddenly drop int othe end position.
Ther eisar isk of inju ryfora nyo ne in the
engine bonn et's rang eofm ovement. #
Onlyopen or close thee ngine bonn et
when ther ea reno persons in the
engine bonn et's rang eofm ovement. &
WARNING Danger of bu rnsw hen open‐
ing theb onnet
If yo uo pen thee ngine bonn etwhen the
engine has overheated or during afireint he
engine compartment, youc ould come into
contact wit hhotgases or other escaping
operating fluids. #
Befor eopening theb onnet ,allowt he
engine tocool down. #
Inthee vent of afireint he engine com‐
partment, keep thee ngine bonn et
closed and cal lthe fire service. &
WARNING Risk of inju rydue tomoving
parts
Cer tain component sinthe engine compart‐
ment ma ycontinue tomo veor suddenly
mo veagain evenafter thei gnition has been
switched off, e.g. thec ooler fan.
Ma kesur eoft hefollowing befor eperform ing
ta sk sint he engine compartment: #
Switc hthe ignition off. #
Nevertouc hthe danger zone sur round‐
ing movin gcomponent pa rts, e.g. the
ro tatio na reaoft hefan. #
Remo vejewe ller yand watches. #
Keep items of clo thing and hair away
from moving parts. &
WARNING Risk of inju ryfrom touching
co mp onent parts under voltage
The ignition sy stem and thef uel injection
sy stem workunder high voltage. If yout ouch
component parts whic hareunder voltage,
yo uc ouldrecei vean electric shoc k. #
Nevertouc hcomponents of thei gnition
sy stem or thef uel injection sy stem
when thei gnition is switched on. &
WARNING Danger of bu rnsf romh ot
component parts in thee ngine compart‐
ment
Cer tain component parts in thee ngine com‐
partmen tmaybe very hot, e.g. thee ngine, Maintenanc
eand care 347

#
Slowly tur nthe cap half aturntoa llow
pressur etoescape. #
Park thev ehicle on alevel sur face. #
Chec kthe coolant temp eratur edispla yint he
instrument clus ter.
The coolant temp eratur emustbeb elow
70 °C. #
Slowl yturnc ap 1 anti-clockwise torelie ve
exc ess pressure. #
Continue turning cap 1anti-clockwise and
re mo veit.
The coolan tleve lisc orrect:
R ifth ee ngine is cold up tomar kerb ar2
R ifth ee ngine is warm upto1.5c mo ver
mar kerb ar2 #
If necessar y,topupw ithc oolant that has
been appr ovedbyM ercedes-Benz.
R Further information on coolant (→ page415 ) To
pping up the windsc reen washer sy stem &
WARNING Danger of bu rnsf romh ot
component parts in thee ngine compart‐
ment
Cer tain component parts in thee ngine com‐
partmen tmaybe very hot, e.g. thee ngine,
th er adiator and parts of thee xhau stsystem. #
Letthe engine cool down and only
to uc ht he component parts described
below: &
WARNING Danger of bu rnsw hen open‐
ing theb onnet
If yo uo pen thee ngine bonn etwhen the
engine has overheated or during afireint he
engine compartment, youc ould come into
contact wit hhotgases or other escaping
operating fluids. #
Befor eopening theb onnet ,allowt he
engine tocool down. #
Inthee vent of afireint he engine com‐
partment, keep thee ngine bonn et
closed and cal lthe fire service. &
WARNING ‑Riskoff irea nd injur ydue to
windscreen washer concentrate
Wi ndsc reen washer concentrat eishighly
fl ammable. It coul dignit eifitc omes into
con tact wi thhote ngine component parts or
th ee xhau stsystem. Maintenanc
eand care 351

Note
sonb rake fluid Obser
vethen otes on operating fluids
(→ pag e409). &
WARNING Risk of an accident du eto
va pour poc kets form ing in theb rake sys‐
tem
The brak efluid cons tantl ya bsorbs moi sture
from thea ir.T his lo werstheb oiling point of
th eb rake fluid. If theb oiling point is tool ow,
va pour poc kets ma yformint he brak esys‐
te mw hen theb rake sa reapplied hard.
This impair sthe braking ef fect. #
Have theb rake fluid rene we datt he
specified inter vals. Ha
ve theb rake fluid regularly changed at aquali‐
fi ed specialis tworks hop.
Onl yuse brak efluid appr ovedbyM ercedes-Benz
according toMB-F reigabe or MB-Appr oval 33 1.0. Fu
rther information on brak efluid:
R intheM ercedes-Benz Specification sfor
Operating Fluids at http://be vo.mercedes-
benz.com
R ataq ualified specialis tworks hop Coolant
Note
sonc oolant
Obser vethen otes on service products
(→ pag e409). &
WARNING Risk offire ‑a nd inju ryfrom
antifreeze
If antifreeze comes int ocontact wit hhot
component parts in thee ngine compart‐
ment ,itmayignite. #
Allo wthe engine tocool down before
yo ut op up thea ntifre eze. #
Mak esuret hat no antifreeze spills out
next tothef iller opening. #
Thoroughl yclean thea ntifre eze from
componen tparts befor estartin gt he
ve hicle. *
NO
TEDama gecaused byincor rect cool‐
ant #
Onlyadd coolant that has been pre‐
mixed wit hthe requ ired antifreeze pro‐
te ction.
Fu rther information on coolant:
R IntheM ercedes-Benz Specification sfor
Operating Fluids 310.1, e.g. online at
http://be vo.mercedes-benz.com.
R Ataq ualified specialis tworks hop. *
NO
TEOverheating at high outsid etem‐
peratures If an inappropriat
ecoolant is used, the
engine cooling sy stem is no tsufficientl ypro‐
te cted agains toverheating and cor rosion at
high outside temp eratures. Te
ch nica ldata 413

Engine
Displa
ymessages
Possible causes/consequences and M
MSolutions
Top up coolant See Own-
er’s Manual *T
he coolant le velist oo lo w.
* NO
TEEngine dama gedue toinsuf ficient coolant #
Avoid long journe yswit hinsuf ficient coolant. #
Addc oolant .
?
Coolant Stop vehicle
Switc hengin eoff *T
he coolant is tooh ot. #
Stop thev ehicle immediately ,paying attention toroad and traf ficc onditions ,and switc hoffthee ngine. &
WARNING Danger of bu rnsw hen opening theb onnet
If yo uo pen thee ngine bonn etwhen thee ngine has overheated or during afireint he engine compartment, you
could come int ocontact wi thhotg ases or other escaping operating fluids. #
Befor eopening theb onnet ,allowt he engine tocool down. #
Inthee vent of afireint he engine compartment, keep thee ngine bonn etclosed and cal lthe fire service. #
Wait until thee ngine has cooled down. #
Mak esuret hat thea ir supply tother adiator is no tobstructed. #
Avoiding high loads on thee ngine, driv eontothe neares tqualified specialis tworks hop. In doing so, ensur ethat
th ec oolant temp eratur edispla yremain sbelo w1 20 °C. Displ
aymessa gesa nd warning/indicator lamps 441

Displa
ymessages
Possible causes/consequences and M
MSolutions
Stop vehicle Leave engine
runnin gWait Transmission
cooling *T
he transmission has overheated. Pulling away can be temp orarily impaired or no tpossible. #
Pull overand stop thev ehicle safely as soon as possible, paying attention toroad and traf ficc onditions .Donot
continu edriving under an ycircums tances. #
Lea veengine running. #
Wait until thed ispla ymessag edisappear sbefor epulling away.
Auxiliar ybattery malfunc-
tion *T
he auxiliary batteryfor thet ransmission is no longer being charge d. #
Consult aqualified specialis tworks hop. #
Untilthen, alw aysm anually se tthe transmission toposition jbefor eyou switc hoffthee ngine. #
Befor eleaving thev ehicle, apply thee lectric parking brake.
Air conditionin gMalfunc-
tion See Owner's Manual *O
peration of thec limat econtrol sy stem is temp orarily restricted. Air flow and fresh air suppl yaresettoa utomatic
mode. #
Have thec limat econtrol sy stem checkedataq ualified specialis tworks hop. 452
Displa ymessages and warning/indicator lamps

Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
? Coolant warning lamp The
redc oolant warning lam pislit while thee ngine is running.
Po ssible causes:
R The temp eratur esensor is malfunctioning
R Coolant le veltoo low
R The air suppl ytotheradiator is obstructed
R The radiator fani sfaulty
If th er eisana dditional warning tone, thec oolant temp eratur ehasexceeded 120° C. &
WARNING Danger of bu rnsw hen opening theb onnet
If yo uo pen thee ngine bonn etwhen thee ngine has overheated or during afireint he engine compartment, you
could come int ocontact wi thhotg ases or other escaping operating fluids. #
Befor eopening theb onnet ,allowt he engine tocool down. #
Inthee vent of afireint he engine compartment, keep thee ngine bonn etclosed and cal lthe fire service. #
Stop thev ehicle immediately ,paying attention toroad and traf ficc onditions ,and switc hoffthee ngine. Do no tcon‐
tinue driving under an ycircums tances. #
Obser vethem essages in them ultifunction displa y.
If th ec oolant temp eratur edispla yisatt he lowerend of thet emperatur escale: #
Consult aqualified specialis tworks hop. Displa
ymessages and warning/indicator lamps 473