ECU MERCEDES-BENZ C-CLASS CABRIOLET 2021 Owner's Guide

Af
terth ech ild restra int system has been
re mo ved, replace thehead restra int sag ain
immed iatelyand adjus tth em correctly .
0073 The
backrest of thefo rw ard-f acin gch ild
re stra int system mus t,as faras possi ble,be
re sting ontheseat backres tof there ar
seat .
0073 If
th ehead restra int ofthech ild seat cannot
be fullyex tende dwh en itis ins talled inthe
ve hicle, this will result inrestrictions onthe
maximu msize setting forch ild restra int sys‐
te ms inwe ight categor yII or III.
Cont actwithth ero of when thehead
re stra int isfull yex tende dand lock ed in
place willnotre sult inanyre strictions on
us e.
0073 The
child restra int system mus tno tbe put
under stra in be tween thero of and theseat
cushion and/orbeinstalled facing the
wr ong direct ion. Wher eposs ible, adjus tth e
seat cushion inclination accordingly.
0073 The
child restra int system mus tno tbe put
under stra in by thehead restra int .Ad jus t
th ehead restra int sas appr opriate. 0073
Mak
esur eth at thech ild's feet do notto uc h
th efront seat. Ifneces sary,mo vethefront
seat slightl yfo rw ards.
% Beforeopen ingorclo singth esof tto p, child
re stra int systems inwe ight categor yII or III
mus tbe remo vedor thehead restra int sof
th ech ild restra int systems mustbe mo ved
to thelowe stposition .In this case, letth e
ch ild getou tbe fore opening orclosing the
sof tto p.
The seat belts onthefo llo wing seats areeq uip‐
ped withaspec ialseat beltretract or:
R Front passeng erseat
R Rear seat s
When enabled,thespecial seatbeltretract or
ens ures that theseat belts ofthefront
passeng erseat andrear seat sdo notslac ken
once thech ild restra int system issecur ed
(/ page55). #
Installth ech ild restra int system.
The entire base ofthech ild restra int system
mus talw aysre st on thesitt ing surface ofthe
re ar seat . #
Alw aysmak esur eth at theshoulder belt
st ra pis cor rectly routed from theseat belt
outle tof theve hicle totheshoulder belt
guide onthech ild restra int system.
The shoulder beltstra pmus tbe routed for‐
wa rdsand down wardsfrom theseat beltout‐
le t.
No teson rear wa rd-faci ng and forw ard-f acin g
ch ild restra int systems onthefront
pa sseng erseat &
WARNIN GRisk ofinju ryor deat hwhen
using are ar wa rd-faci ng child restra int
sy stem while thefront passeng erairbag
is enabled
If yo usec ureach ild inare ar wa rd-faci ng
ch ild restra int system onthefront passeng er
seat andthePA SSENGER AIRBAGOF Find i‐
cat orlam pis off,th efront passeng erairbag
can deplo yin theev ent ofan acciden t.
The child could bestru ck bytheairbag. 60
Occupant safety

Alw
aysensur eth at thefront passeng erair‐
bag isdisabled. ThePASSENGER AIRBAG
OFF indicat orlam pmus tbe lit.
NEVER useare ar wa rd-faci ng child restra int
sy stem onaseat withan ENABL EDFRONT
AIRB AG.Thi scan result intheDE ATHof or
SERIOU SINJU RYtotheCH ILD. Obser
vethespecif icins truction sfo rth ere ar‐
wa rd-faci ng and forw ard-f acin gch ild restra int
sy stems (/page61 ).
Alw aysobser vethest atus ofthefront passeng er
airbag onthePA SSENGER AIRBAGOF Find ica‐
to rlam p:
R When using are ar wa rd-faci ng child restra int
sy stem onthefront passeng erseat, thefront
passeng erairbag mustalw aysbe disabl ed.
This isonl yth ecase ifth ePA SSENGER AIR
BA GOF Find icat orlam pis lit con tinuousl y
(/ page47 ).
R Ifth ePA SSENGER AIRBAGOF Find icat or
lam pis off,th efront passeng erairbag isena‐
bled. Thefront passeng erairbag maydeplo y
dur ing anacciden t. Secur
ingthech ild restra int system withth e
seat beltonthefront passeng erseat
When installing abelt- secur edchild restra int
sy stem onthefront passeng erseat, always
obser vethefo llo wing:
0073 Obser
vetheno teson rear wa rd-faci ng and
fo rw ard-f acin gch ild restra int systems on
th efront passeng erseat (/page60).
0073 Obser
vethech ild restra int system manuf ac‐
tur er's installation andoper atingins truc‐
tion s.
0073 When
usingafo rw ard-f acin gch ild restra int
sy stem inwe ight categor yI: re mo vethe
head restra int from there spectiv eseat, if
possible .
Af terth ech ild restra int system has been
re mo ved, replace thehead restra int sag ain
immed iatelyand adjus tth em correctl y.
0073 The
backres tof thefo rw ard-f acin gch ild
re stra int system mus t,as faras possi ble,be
re sting ontheseat backres tof thefront
passeng erseat.
0073 If
th ehead restra int ofthech ild seat cannot
be fullyex tende dwh en itis ins talled inthe ve
hicle, this will result inrestrictions onthe
maximu msize setting forch ild restra int sys‐
te ms inwe ight categor yII or III.
Cont actwithth ero of when thehead
re stra int isfull yex tende dand lock ed in
place willnotre sult inanyre strictions on
us e.
0073 The
child restra int system mus tno tbe put
under stra in be tween thero of and theseat
cushion and/orbeinstalled facing the
wr ong direct ion.
0073 The
child restra int system mus tno tbe put
under stra in by thehead restra int .Ad jus t
th ehead restra int sas appr opriate.
0073 Ne
verpla ceobjects (e.g.cushi ons)under or
behi ndthech ild restra int system.
The seat beltonthefront passeng erside is
eq uipped withaspecial seatbeltretract or.
Wh enena bled ,th especial seatbeltretract or
ens ures that theseat beltdoes notslac kenonce
th ech ild seat issecur ed(/ page55). Occ
upant safety 61

#
Setth efront passeng erseat asfarbac kas
possi bleand movetheseat intoth ehighes t
position ifpossible. #
Fully re tract theseat cushion lengthadjus t‐
ment . #
Adjus tth eseat cushion inclination sothat
th efront edgeof theseat cushion isin the
highes tposition andthebac kedg eof the
seat cushion isin thelowe stposition . #
Setth eseat backres tto themos tve rtical
posit ionpossible . #
Installth ech ild restra int system.
The entire base ofthech ild restra int system
mus talw aysre st on thesitt ing surface ofthe
fr ont passeng ersea t. #
Alw aysmak esur eth at theshoulder belt
st ra pis cor rectly routed from theseat belt
outle tof theve hicle totheshoulder belt
guide onthech ild restra int system.
The shoulder beltstra pmus tbe routed for‐
wa rdsand down wardsfrom theseat beltout‐
le t. #
Ifneces sary,adjus tth eseat beltoutle tand
th efront passeng erseat accor dingly. No
teson pets intheve hicl e &
WARNIN GRisk ofacci dent andinjury
due toanim alsleftuns ecur edorunat ‐
te nde din theve hicle
If yo ulea veanim alsintheve hicle unatten‐
ded orunsecur ed,they cou ldpos siblypress
butt ons orswitc hes.
An animal may:
R Activateve hicle equipment andbecome
tr apped, forex am ple
R Swit chsystems onoroffand endang er
ot her road user s
Un secur edanimals maybe throw nar ou nd in
th eve hicle intheeve ntofan acci dent or
su dd en steer ing and braking maneuv ersand
injur eve hicle occupants inthepr ocess. #
Neverlea veanim alsintheve hicle unat‐
te nde d. #
Alw ayscor rectly secu reanim alswhile
dr ivin g,e.g .usin gasuit able anim alcar ‐
ri er . 62
Occupant safety

Closing
thetrunk lid &
WARNIN GRisk ofinju ryfrom unsecu red
it ems intheve hicle
If object s,lugg ageor loads areno tsecur ed
or notsecur edsuf ficie ntly,they cou ldslip,
tip ove ror be throw nar ou nd and ther eb yhit
ve hicle occupants.
Ther eis arisk ofinjur y,par ticular lyin the
ev ent ofsudden braking orasudden chang e
in dir ect ion. #
Alw aysst ow object sin suc hawa yth at
th ey canno tbe thro wn around . #
Beforeth ejour ney,secur eobjects, lug‐
ga ge orloads agains tslipping ortipping
ove r. Obser
vetheno teson loadi ngtheve hicle. #
Pull thetrunk liddown wardsusing thehan‐
dle recess andpush itclos ed. Sw
itchin gse par atetrunk lock ing onoroff If
yo ucen trally unlocktheve hicle while separate
loc king isactiv ated, thetrunk willremain locked. #
Toswitc hon: slide theswitc hto position
0047. #
Toswitc hof f:slide theswitc hto position
0048. %
Ifan acciden thas been detected, thetrunk
will unloc keve nif sep aratelock ing is
switc hedon. Un
loc king andopening thetrunk from insid e
wit hth eemer gency release Re
quirement s:
R The 12Vve hicle batteryis conn ectedand
ch arge d. Openin
gand closin g71

The
ATAsy stem isarmed automaticall yaf te r
appr oximat elyte nseco ndsinthefo llo wing situa‐
tion s:
R Afterloc king theve hicle withth eSmar tKey
R Afterloc king theve hicle using KEYLES S-GO Indicat
orlam p1 flashes whentheAT Asy stem
is armed. The
ATAsy stem isdeactiv ated aut omaticall yin
th efo llo wing situat ions:
R Afterunloc kingtheve hicle withth eSmar t‐
Ke y
R Afterunloc kingtheve hicle using KEYLES S-
GO
R Afterpr essing thest ar t/ stop butt onwithth e
Smar tKey inthestor ag ecom partmen t
(/ page12 6)
% When theMer cedes‑ Benzemergency call
sy stem isactiv eand thealar mstay son for
mor eth an 30 sec onds, ames sageis aut o‐
mat icall ysen tto theCus tomer Assis tance
Ce nter (/ page 289) .
% Inthecase ofsevere batt erydisc harging,
th eanti- theftalar msystem isaut omaticall y
deactiv ated tofacil itat eth ene xt engine
st ar t.
Deact ivat ing theATA #
Press theÜ, ßor008B buttononthe
Smar tKey .
or #
Press thest ar t/ stop butt onwithth eSmar t‐
Ke yin thestow agecom partment
(/ page12 6)
De activ ating theala rm using KEYLESS-GO #
Grasp theoutside doorhandle withth e
Smar tKey outside theve hicle. Opening
andclosing 83

&
WARNIN GRisk ofinju ryfrom unsecu red
it ems intheve hicle
If object s,lugg ageor loads areno tsecur ed
or notsecur edsuf ficie ntly,they cou ldslip,
tip ove ror be throw nar ou nd and ther eb yhit
ve hicle occupants.
Ther eis arisk ofinjur y,par ticular lyin the
ev ent ofsudden braking orasudden chang e
in dir ect ion. #
Alw aysst ow object sin suc hawa yth at
th ey canno tbe thro wn around . #
Beforeth ejour ney,secur eobjects, lug‐
ga ge orloads agains tslipping ortipping
ove r. &
WARNIN GRisk ofinju rydue toobject s
being stowe dincor rectl y
If obje ctsintheve hicle interior arestowe d
inc orrectly ,th ey can slide orbe throw n
ar oun dand hitvehicle occupants. Inaddi‐
tion, cupholder s,open stor ag espaces and
mobile phonebrac kets cann otalw aysre tain
all obje ctsth ey cont ain. The
reisarisk ofinjur y,par ticular lyin the
ev ent ofsudden braking orasudden chang e
in dir ect ion. #
Alw aysst ow object sin suc hawa yth at
th ey canno tbe thro wn around insuc h
sit uation s. #
Alw aysmak esur eth at obj ect sdo not
pr otru de from stor ag espaces, parcel
ne ts or stor ag ene ts. #
Close theloc kable stor ag espaces
bef orest ar tin gajo ur ne y. #
Alw aysst ow and securehea vy,har d,
poin ted, shar p-edg ed,fragile orbulky
objec tsinthetrunk . Ve
hicl eswith automatic front passen gerair‐
bag shutoff:Ob jects trap pe dund erthefront
passeng erseat mayint erfere wit hth efunc tion
of theaut omatic front passeng erairbag shutoff
or damag eth esy stem. Please observetheno tes
on thefunc tion oftheaut omatic front passeng er
airbag shutoff(/ page45). &
WARNIN G‑Ri sk ofacci dent orinju ry
when usingthecup holder whilethe
ve hicle ismo ving
The cup holder cannotsecur econt ainer s
while theve hicle ismo ving.
If yo uuse acup hold erwhile theve hicle is
mo ving, thecon tainer maybe flung aroun d
and liquids maybe spille d.The vehicle occu‐
pants maycome intocont actwithth eliq uid
and ifit is ho t,th ey cou ldbe scal ded.Yo u
cou ldbe dist ra cted from traf fic condi tions
and youma ylose contro lof theve hicle. #
Onlyuse thecup holder whentheve hi‐
cle isstatio nary. #
Onlyuse thecup holder forcont ainer s
of theright size. #
Close thecon tainer ,par ticular lyifth e
liq uid isho t. Seat
sand stow ing 99

*
NO
TEDama getothehandle inthetrunk
fl oor If
th ehandle inthetrunk islef tpr otru ding,
th ehandle maybe damag ed. #
Beforeclosing thetrunk lid,detach the
handle andpress itdo wn closed again. *
NO
TEDama getothestow agecom part‐
men tunde rth eashtr aydue tointens e
heat The
stow agecom partment unde rth eashtra y
is no theat resis tant and couldbe damag edif
yo ure st alit cig arette on it. #
Mak esur eth at theashtr ayisfull y
eng aged. &
WARNIN G‑Ri sk offire and injuryfrom
ho tcig arette light er
Yo ucan burnyo urself ifyo uto uc hth eho t
heating element orthesoc ketof thecig a‐
re tte light er. In
additio n,flammab lemat erials mayign ite
if:
R youdr op theho tcig arette light er
R ach ild holds theho tcig arette light erto
object s,forex am ple #
Alw ayshold thecig arette light erby the
knob . #
Alw aysmak esur eth at thecig arette
light erisout ofreac hof childr en. #
Neverlea vechildr enunat tende din the
ve hicle. &
WARNIN GRisk ofburnsfrom theta il‐
pipe andtailpipe trims
The exhaus tta ilpipe andtailpipe trims can
becom eve ry hot.Ifyo uco me intoco ntact
wit hth ese partsof theve hicle, youco uld
bur nyo urself . #
Alw aysbe par ticular lycareful arou nd
th eta ilpipe andtheta ilpipe trims and
super visechildr enespec iallycloselyin
th is area. #
Allo wvehicle partsto cool down before
to uc hin gth em. The
driving charact eristic sof your vehicle are
dependent onthedis tribution oftheload within
th eve hicle. Yousho uld bear thefo llo wing in
min dwhen loading theve hicle:
R Neverex ceed theper missible gross mass or
th egr oss axle weight rating forth eve hicle
(including occupants). Thevalues arespec i‐
fi ed on theve hicle identif ication plateon the
ve hicle's B-pillar.
R The load mustno tpr otru de abo vetheupper
edg eof theseat backres ts.
R Alw aysplace theload behind unoccupied
seats ifpossible.
R Secur eth eload using thetie-do wneyes and
dis tribut eth eload evenly. 10
0
Sea tsand stow ing

#
Foldthecor responding seatbackres t1
bac kuntil iteng ages.
Lef tand right seat backres ts: ifth eseat
bac kres tis no teng aged and lockedin place,
th is will besho wnonthemultifunc tiondis‐
pla yon theins trument cluster.
A wa rning tone willal so sou nd. Ov
erview ofthetie- down eyes Obser
vetheno teson loadi ngtheve hicle
(/ page98). 1
Tie-do wneyes At
tac hin gth epa rcel ne t &
WARNIN GRisk ofinju rydue toobject s
being stowe dincor rectl y
If obje ctsintheve hicle interior arestowe d
inc orrectly ,th ey can slide orbe throw n ar
oun dand hitvehicle occupants. Inaddi‐
tion, cupholder s,open stor ag espaces and
mobile phonebrac kets cann otalw aysre tain
all obje ctsth ey cont ain.
The reisarisk ofinjur y,par ticular lyin the
ev ent ofsudden braking orasudden chang e
in dir ect ion. #
Alw aysst ow object sin suc hawa yth at
th ey canno tbe thro wn around insuc h
sit uation s. #
Alw aysmak esur eth at obj ect sdo not
pr otru de from stor ag espaces, parcel
ne ts or stor ag ene ts. #
Close theloc kable stor ag espaces
bef orest ar tin gajo ur ne y. #
Alw aysst ow and securehea vy,har d,
poin ted, shar p-edg ed,fragile orbulky
objec tsinthetrunk . Obser
vetheno teson loadi ngtheve hicle. Seats
andstow ing 10
3

#
Alw aysmak esur eth at obj ect sdo not
pr otru de from stow agespac es,parcel
ne ts or stow agene ts. #
Close theloc kable stow agespac es
bef orest ar tin gajo ur ne y. #
Alw aysst ow and securehea vy,har d,
poin ted, shar p-edg ed,fragile orbulky
objec tsinthetrunk/ cargocom part‐
ment . Obser
vetheno teson loadi ngtheve hicle. &
WARNIN GRisk offire from placing
objects inthemobile phonestor ag e
com partmen t
Placing other object sin themobile phone
st or ag ecom partmen tcould constituteafire
hazar d. #
Apar tfr om amobile phone, donot
place anyot her object sin themobile
phone stor ag ecom partmen t,especiall y
th ose made ofme tal. *
NO
TEDama getoobject scaused by
placing them inthemobile phonestor‐
ag ecom partmen t If
object sar eplaced inthemobile phone
st or ag ecom partmen t,th ey ma ybe dama ged
by electr omagne ticfields. #
Donotplace credit cards, datast or ag e
de vices, skipasses orother object s
sensitiv eto electr omagne ticfields in
th emobile phonestor ag ecom part‐
ment . *
NO
TEDama getothemobile phone
st ow agecom partment caus edbyliquids If
liq uids enterthemobile phonestow age
com partment ,th ecom partmen tma ybe
damag ed. #
Ensur eth at no liquids enterthemobile
phone stow agecom partment . The
follo wing noteson wirelessl ych argin gth e
mobil ephone mustbe obser ved:
R Depen dingontheve hicle equipment, the
mobil ephone isconnect edtotheve hicle's
ex terior ant enna viathech argin gmodul e.
R The chargin gfun ction and wireless connec‐
tio nof themobile phonetotheve hicle's
ex terior ant enna areonl yav ailable ifth eigni‐
tion isswitc hedon.
R Small mobile phones mayno tbe able tobe
ch arge din eve ryposition ofthemobile
phone stor ag ecom partmen t.
R Largemobil ephones whichdo notre st flat in
th emobile phonestor ag ecom partmen tma y
no tbe able tobe charge dor con nectedwit h
th eve hicle's exterior ant enna.
R The mobile phonemayheat updur ing the
ch argin gpr oce ss.This maypar ticular ly
de pend ontheapplications (apps)currentl y
op en inthebac kground .
R Toensur emor eef ficie ntchargin gand con‐
nec tionwit hth eve hicle's exterior ant enna,
re mo vethepr otect ive co verfr om themobile Seats
andstow ing 10
5

phone.
Protect ive co vers whic har enec es‐
sar yfo rwir eles sch argin gar eexc luded. Wi
relessl ych argin gamobi lephone Re
quirement s:
R The mobile phoneis suit able forwir eles s
ch argin g.
A lis tof com patible mobi lephon escan be
fo und at:ht tp s:// www .merced es-ben z-
mob ile.com #
Plac eth emobile phoneasclose tothecen‐
te rof mat 1aspossi blewithth edispla y
fa cing upwa rds.
When thech argin gsymbo lis sho wninthe
multime diasystem, themobile phoneis
being charge d.
Malfunct ionsduring thech argin gpr oce ssare
sho wninthemedia display.
% The mat canberemo vedby theta bfo r
cle ani ng, e.g. using clean, luke wa rm water. Ins
tallin g/remo ving thefloor mats &
WARNIN GRisk ofacci dent dueto
object sin thedr iver's foot we ll
Obj ectsin thedr iver's foot we llma yim pede
pedal trav el or bloc kadepr essed pedal.
This jeopar dizestheoper ating androad
saf etyof theve hicle. #
Stow allobj ect sin theve hicle secur ely
so that they canno tget intoth edr iver's
fo ot we ll. #
Alw aysins tallth efloor mats securely
and asprescr ibed inorder toensur e
th at ther eis alw ayssuf ficie ntroom for
th epedals. #
Donotuse loose floor mats anddonot
place floor mats ontopof one another. 10
6
Sea tsand stow ing