2019 MERCEDES-BENZ C-CLASS CABRIOLET engine

The
segment son speedome ter1 indica tethe
sy stem status forth efo llo wing:
R Cruise control (0013 page16 7)
R ActiveDis tance AssistDIS TRONI C
(0013 page 169)
000E NO
TEEngi nedama gedue toexc essiv ely
high engine speeds The
engine willbedamag edifyo udr ive wit h
th eengine intheov errevving rang e. 0007
Donotdr ive wi th theengine intheove r‐
re vving rang e. The
fuelsu pp lyis int erru pted toprotect the
engine whenthere dmar kon tach ome ter3
(o ve rrev ving rang e) isreac hed.
Dur ing norm aloper atingcon dition s,coo lant
te mp eratur edispla y4 mayrise tothere d
mar k. 000A
WARNIN GDang erofburnswhen open‐
ing thehood
If yo uopen thehood when theengine has
ove rheat edordur ing afire intheengine
com partmen t,yo uco uld come intoco ntact
wit hho tga ses orother escaping operating
fl uids. 0007
Beforeopen ingthehood, allowthe
engine tocool down. 0007
Intheeve ntofafire intheengine com‐
par tmen t,ke ep thehood closed and
call thefire ser vice. Ve
hicl eswith a48 Von-b oardele ctrical sys‐
te m (EQ Boo sttech nology) R
POWER 1showstheelectr icaldrive sup‐
por tas aper cent age.
R CHARGE 2 showstheelectr icmo tor's recu‐
per ation powe rper form anc eas aper cen t‐
ag e.
00D0 showsthedr ive sy stem's operational read‐
ine ss. In
stru ment Displa yand on-boar dcom puter 21
3

ASS
YSTPL US service interva ldisp lay Fu
nction oftheASS YSTPL US service interva l
displ ay The
ASSYSTPL US service interva ldispla yon the
Ins trument Displaypr ov ides informatio non the
re maini ngtime ordis tance before thene xt
ser vice duedate.
Yo ucan hide this ser vice mess ageusing the
bac kbutt onon thelef t-hand sideofthesteer ing
wheel.
Depen dingonhowtheve hicle isused, the
ASS YSTPL US service interva ldispla yma y
shor tenth eser vice interva l,e.g. inthefo llo wing
cases :
R Mainl yshor t-dis tance drivi ng
R Whe nth eengine isoftenleft idling forlong
per iods
R Intheeve ntoffreq uent col dstar tphase s
Mer cedes-Ben zre comme ndsavoiding such
oper ating condit ions.
Yo ucan obtain further information concerning
th eser vicing ofyour vehicle from aqu alif ied spec
ialistwo rkshop, e.g.anaut hor ized
Mer cedes-Benz Center. Displa
yingtheser vice dueda te On-boar
dcom puter:
0018 Service 0019
ASS YST PLUS
The next ser vice duedateis displa yed. 0007
Toexitth edisp lay: press thebac kbutt on
on thelef t-hand sideofthesteer ing wheel.
Mak esur eto obser vethefo llo wing further rela‐
te dsubjec t:
R Oper ating theon- boar dcom puter
(0013 page21 4). Inf
ormation onregular maintenance work 000E
NO
TEPrema turewe arthro ugh failur eto
obser veser vice duedates Ser
vice workwhic his no tcar ried out atthe
ri ght time orincom pletely can lead to
inc reased wearand damag eto theve hicle. 0007
Alw aysobser vethepr escr ibed service
int erva ls. 0007
Alw aysha ve thepr escr ibed service
wo rkcar ried out ataqu alif ied spec ialist
wo rkshop. Special
service requ irement s The
prescr ibed service interva lis based onnor ‐
mal opera tionoftheve hicle. Maintenance work
will needto be per form ed mor eof tenif th eve hi‐
cle isoper ated under arduous conditions or
incr eased loads.
The ASSYSTPL US service interva ldispla yis onl y
an aid. Thedriver oftheve hicle bearsre sponsi‐
bility asrega rdsto whe ther maint enanc ewo rk
nee dstobe per form ed mor eof tenth an spec i‐
fi ed based ontheactual operating conditions
and/or loads.
Ex am ples ofarduous operating conditions :
R regular citydriving withfreq uent intermedi‐
at estops
R mainly short-distance drivi ng Ma
intena nce and care33
7

R
freq uent operation inmount ainouste rrain or
on poor road sur faces
R whe nth eengine isoftenleft idling forlong
per iods
R oper ation inpar ticula rly dus tycond ition s
and /orif air -rec ircula tion mod eis freq uen tly
used
In these orsimilar operating conditions ,ha ve the
int erior airfilt er ,engin eair clean er,engin eoil
and oilfilt er etc. chang edmor efreq uent ly.The
tir es mus tbe checkedmor efreq uentl yif th e
ve hicle isoper ated under increased loads. Fur‐
th er information canbeobt ained ataqu alif ied
spec ialistwo rkshop. Batt
erydisconne ctionperiods The
ASSYSTPL US service interva ldisp lay
can onlycalculat eth eser vice dueda te when
th ebat tery isconnect ed. 0007
Notedown theser vice duedatedispla yedon
th eins trument displaybef orediscon necting
th ebatt ery(0013 page33 7). Engine
compartment Opening/closing
thehood 000A
WARNIN GRisk ofacci dent ifth eengine
hood isunlatc hedwhile driving
An unloc kedengin ehood mayopen upwhen
th eve hicle isin mo tion andblockyo ur vie w. 0007
Neverunla tchth eengine hoodwhile
dr iving. 0007
Beforeev erytrip, ensur eth at the
engine hoodislatc hed. 000A
WARNIN GRisk ofacci dent andinjury
when openingand closingtheengine
hood
When opening orclosing theengine hood,it
ma ysuddenl ydr op intoth eend position .
Ther eis arisk ofinjur yfo ran yone inthe
engine hood's rang eof mo vement. 0007
Onlyopen orclose theengine hood
when ther ear eno per sons inthe
engine hood's rang eof mo vement. 000A
WARNIN GDang erofburnswhen open‐
ing thehood
If yo uopen thehood when theengine has
ove rheat edordur ing afire intheengine
com partmen t,yo uco uld come intoco ntact
wit hho tga ses orother escaping operating
fl uids. 0007
Beforeopen ingthehood, allowthe
engine tocool down. 0007
Intheeve ntofafire intheengine com‐
par tmen t,ke ep thehood closed and
call thefire ser vice. 000A
WARNIN GRisk ofinju rydue tomo ving
par ts
Cer tain com pone ntsin theengine compart‐
ment maycon tinue tomo veorsuddenly
mo veagain evenaf te rth eignition hasbeen
switc hedoff,e.g. thecooler fan.
Ma kesur eof thefo llo wing beforeper form ing
ta sk sin theengine compartmen t: 0007
Swi tchth eignition off. 338
Maintenanc eand care

0007
Neverto uc hth edang erzon esur round ‐
ing movingco mp onent parts,e.g. the
ro tatio nar ea ofthefa n. 0007
Remo vejewe lry and watche s. 0007
Keep items ofclo thing and hair away
fr om moving parts. 000A
WARNIN GRisk ofinju ryfrom touc hin g
co mp onent partsunder voltag e
The ignit ionsystem and thefuel injec tion
sy stem workund erhigh voltag e. Ifyo uto uc h
co mp onent partswhic har eunder voltag e,
yo uco uld recei vean elec tric shoc k. 0007
Neverto uc hco mp onent partsof the
ignit ionsystem orthefuel injec tionsys‐
te m when theignition isswitc hedon. 000A
WARNIN GRisk ofburnsfrom hotcom‐
ponent partsintheengine compartmen t
Cer tain com pone ntsin theengine compart‐
ment canbevery hot,e.g. theengine, the
ra diat orand partsof theex haus tsy stem. 0007
Allo wtheengine tocool down and only
to uc hco mp onent partsdescr ibedinthe
fo llo wing. 000A
WARNIN GRisk ofinju ryfrom using the
winds hieldwiper swhile theengine hood
is open
When theengine hoodisopen andthewind‐
shield wipersar ese tin mo tion ,yo ucan be
tr apped bythewiper linkage. 0007
Alw aysswitc hof fth ewindshield wipers
and ignition beforeopening theengine
hood. 0007
Toopen: pullleve r1 torelease thehood. Maint
enanc eand care339

0007
Push handle 1ofthehood catchupw ards
and liftth ehood byappr oximat ely15 in
(40 cm). 0007
Toclose: lowe rth ehood andletit fallfrom a
height ofappr oximat ely8 in (20 cm). 0007
Ifth ehood canstill be lifte dslightl y,open
th ehood again and close itwit halittle more
fo rc euntil iteng ages cor rectl y. Engine
oil Chec
kingtheengine oilleve lusing theoil
dip stick 000A
WARNIN GRisk ofburnsfrom hotcom‐
ponent partsintheengine compartmen t
Cer tain com pone ntsin theengine compart‐
ment canbevery hot,e.g. theengine, the
ra diat orand partsof theex haus tsy stem. 0007
Allo wtheengine tocool down and only
to uc hco mp onent partsdescr ibedinthe
fo llo wing. Re
quirement s:
R The engin emus tha ve an oildips tick.Ifno t,
th eengine oilleve lcan becheckedonl ywit h
th eon- boar dcom puter(0013 page34 1).
Depen dingontheengine, theoil dips tickma ybe
ins talled intheengine compartmen tin dif fere nt
lo cati ons.
The waitin gtim ebef orech ecking theoil leve l
when theengine isat nor mal oper ating temp era‐
tur eis five minut es. 0007
Park theve hicle onaleve lsur face. 0007
Pulloil dips tic k1 outand wipe off. 0007
Slowly slide oildips tic k1 intoth eguide
tube tothestop, and take itout again afte r
appr oximat elyth re esecon ds.
R Oilleve lis cor rect:oil leve lis be tween 2
and 3.
R Oilleve lto olow: oil leve lis at 3 or
belo w. 34
0
Maint enance andcare

R
Oilleve lto ohigh: oilleve lis abo ve2 . 0007
Ifth eoil leve lis toolow, add 1.1 US qt
(1 liter) ofengine oil. 0007
Ifth eoil leve lis toohigh, drain offexc ess
engine oil.Consult aqu alif ied spec ialist
wo rkshop.
Chec kingtheengine oilleve lusing theon-
boar dcom puter
Re quirement s
The engin emus tha ve an oilleve lsen sor.If no t,
th eengine oilleve lcan becheckedonl ywit hth e
oil dips tick(0013 page340).
The engine oilleve lis de term ined during drivin g.
De term inin gth eengine oilleve lcan take up to
30 minut eswit hanor mal driving style and even
long erwit han act ive dr ivin gst yle.
In order torecei veare sult asquickl yas possi‐
ble:
R Warm uptheengine
R Park theve hicle onaleve lsur face
R Lea vetheengine running atidling spe ed On-bo
ardcom puter:
0018 Service0019
Engine OilLeve l
Yo uwill see oneof thefo llo wing mess ages on
th emultifunc tiondispla y:
R Measuring Engine OilLevel.. .:measur ement
of theoil leve lis no tye tpo ssi ble. 0007
Repeat there qu estaf te ra maximu mof
30 minut esdriving.
R Engine OilLevel OKand thebar displa yfo r
indic atingth eoil leve lon themultifunc tion
displa yis green and isbe tween "min" and
"max": theoil leve lis cor rect.
R Engine OilLeve lAdd 1.0land thebar displa y
fo rindica tingtheoil leve lon themultifunc ‐
tion displa yis orang eand isbelo w"min": 0007
Add1.1 US qt(1l)engine oil.
R Red uce Engine OilLevel andthebar displa y
fo rindica tingtheoil leve lon themultifunc ‐
tion displa yis orang eand isabo ve"max ": 0007
Drain offexc ess engine oilthat has been
added. Consult aqu alif ied spec ialistwo rk‐
shop.
R For Engine OilLevel Switch Ignition On: 0007
Switc hon theignition tocheckth eengine oil
le ve l.
R Engine OilLeve lSyst emInoperat ive:sensor
fa ulty ornotins erted. 0007
Consult aqu alif ied spec ialistwo rkshop.
R Engine OilLevel System Currently Unavail.: 0007
Close thehood.
Ad ding engine oil 000A
WARNIN GRisk ofburnsfrom hotcom‐
ponent partsintheengine compartmen t
Cer tain com pone ntsin theengine compart‐
ment canbevery hot,e.g. theengine ,th e
ra diat orand partsof theex haus tsy stem. 0007
Allo wtheengine tocool down and only
to uc hco mp onent partsdescr ibedinthe
fo llo wing. Maint
enanceand care34
1

000A
WARNIN GRisk offire and injuryfrom
eng ineoil
If eng ineoilcom esintocon tact with hot
com ponent partsintheengine compart‐
ment ,it ma yignit e. 0007
Mak esur eth at no eng ineoilisspille d
ne xt to thefiller open ing. 0007
Allo wtheengine tocool offand thor‐
oughl yclean theengine oilfrom com po‐
nen tpar tsbef orest ar tin gth eve hicle. 000E
NO
TEEngi nedama gecau sed byan
inc orrect oil filt er ,inc orrect oil oraddi‐
tiv es 0007
Donotus eengi neoilsor oil filt er s
whic hdo notcor respond tothespecif i‐
cation sex plicitl ypr escr ibed forth e
ser vice interva ls. 0007
Donotalt er theengine oiloroil filt er in
or der toachie velong erchang eint erva ls
th an presc ribed. 0007
Donotuse additiv es. 0007
Followtheins truction sin theser vice
int erva ldispla yre ga rding theoil
ch ang e. 000E
NO
TEDama gecau sed byaddin gto o
muc hengine oil To
omuc hengine oilcan damag eth eengine
or thecat alytic converter . 0007
Have excess engineoilremo vedat a
qu alif ied spec ialistwo rkshop. 0007
Turn cap 1cou nter-cloc kwiseand remo ve
it. 0007
Addengin eoil. 0007
Replace cap1and turnit cloc kwise asfar
as itwill go. 0007
Chec kth eoil leve lag ain (0013 page340 ). 34
2
Maint enance andcare

Chec
kingcoolant leve l 000A
WARNIN GRisk ofburnsfrom hotcom‐
ponent partsintheengine compartmen t
Cer tain com pone ntsin theengine compart‐
ment canbevery hot,e.g. theengine, the
ra diat orand partsof theex haus tsy stem. 0007
Allo wtheengine tocool down and only
to uc hco mp onent partsdescr ibedinthe
fo llo wing. 000A
WARNIN GDang erofburnswhen open‐
ing thehood
If yo uopen thehood when theengine has
ove rheat edordur ing afire intheengine
com partmen t,yo uco uld come intoco ntact
wit hho tga ses orother escaping operating
fl uids. 0007
Beforeopen ingthehood, allowthe
engine tocool down. 0007
Intheeve ntofafire intheengine com‐
par tmen t,ke ep thehood closed and
call thefire ser vice. 000A
WARNIN GRisk ofscal ding from hot
cool ant
The enginecool ingsystem ispressur ized,
par ticular lywhen theengine iswa rm.If yo u
open thecap, youco uld bescalded byhot
coolant spraying out. 0007
Letth eengine cooldown beforeopen‐
ing thecap. 0007
When opening thecap, wearprotect ive
gl ove sand safetygl asses . 0007
Open thecap slowlyto release pres‐
sur e. 0007
Park theve hicle onaleve lsur face. 0007
Checkth ecoolant temp eratur edispla yin the
ins trumen tclus ter.
The coolant temp eratur emus tbe belo w
15 8°F (70 °C). 0007
Slowly turncap 1count er-cloc kwise to
re lie ve ove rpressur e. Maint
enance andcare34
3