MERCEDES-BENZ C CLASS 2021 Workshop Manual

If
th efront passeng erseat isoccupied,
alw aysensur eth at:
R The classificat ion oftheper son inthe
fr ont passeng ersea tis cor rect and the
fr ont passeng erairb agisenabl edordisa ‐
ble din accor dance withth eper son inthe
fr ont passeng ersea t.
R The person issea tedpr oper lywit hacor ‐
re ctly fastened seatbelt.
R The front passeng erseat hasbeen moved
as farbac kas possi ble. Be
sureto also obse rveth efo llo wing further
re lat ed subje cts:
R Child restra int system onthefront passeng er
seat (/page60) PRE-S
AFE®
sy stem PRE-
SAFE®
(ant icipa tory occupa ntprotec‐
tion) PRE-
SAFE®
is ab leto detect cer tain critic aldriv‐
ing situat ionsandimplemen tpr e-em ptive meas‐
ur es toprotect theve hicle occupants.
PRE-S AFE®
can implement thefo llo wing meas‐
ur es indepe ndently of eac hot her :
R Tight ening theseat belts onthedr iver's seat
and front passeng erseat.
R Closing theside windo ws.
R Vehicl eswith sliding sunroof:Clo sethe
sliding sunroof.
R Vehicl eswith memor yfuncti on:movethe
fr ont passeng ersea tto amor efa vo rable
seat position .
R Vehicl eswith multico ntour seat :Incr ease
th eair pressur ein theseat sidebolsters of
th eseat backres t.
R PRE-S AFE®
Sound: prov ided that themulti‐
media system isswitc hedon,gener ates a br
iefnoi sesigna lto stimulat eth einnat epr o‐
te ctiv emec hanism ofaper son's hearing.
* NO
TEDama gecau sed byobject sin the
fo ot we llor behin dth eseat The
automatic adjustmentof theseat posi‐
tion mayre sult indamag eto theseat and/or
th eobjec t. #
Stow object sin asuit able place. Re
versing thePRE- SAFE®
sy stem mea sures If
an acc iden tdid notocc ur,th epr e-em ptive
measur esthat we retak en arere ve rsed.
Yo uwill need toper form certain settings your‐
self . #
Ifth eseat beltpre-t ension ingisno tre duced,
mo vetheseat backres tbac kslightl y.
The locking mechanism releases. Occ
upant safety 49

Fu
nction ofPRE-S AFE®
PL US (anticipat ory
occupant protection plus) PRE-
SAFE®
PL US can detect cer tain im pact s,
par ticular lyan imm inentrear impact ,and take
pr e-em ptive measur estoprotect theve hicle
occupants. Thesemeasur escanno tnecessar ily
pr eve ntan imm inentimpact.
PR E-S AFE ®
PL US can implem entthefo llo wing
measur esindepe ndently of eac hot her :
R Tight ening theseat belts onthedr iver's seat
and front passeng erseat.
R Increasin gbr ak epr essur ewhen theve hicle
is statio nary.This brak eapplication iscan‐
celed automaticall ywhen theve hicle pulls
aw ay.
If an accident didnotoccur ,th epr e-em ptive
measur esthat we retake nar ere ve rsed.
Sy stem limit s
The system will notinitiat ean yaction inthefo l‐
lo wing situat ions:
R When backingup The
system will notinitiat ean ybr aking applica‐
tion inthefo llo wing situat ions:
R Whils tdr ivin g
or
R When entering orexitin gapar kingspace
while using ActivePa rking Assist Saf
elytransp orting childr enintheve hicl e Alw
aysobser vewhen childr enaretrav eling
in theve hicl e %
Also strictly observe thesaf etyno tesfo rth e
specif icsituation. Inthis wa yyo ucan recog‐
nize potentia lri sk sand avoiddang ersif ch il‐
dr en aretrav eling intheve hicle
(/ page51 ).
Be dilig ent
Bear inmind that neg ligenc ewhen securing a
ch ild inthech ild restra int system mayha ve ser i‐
ous conseq uences. Alwaysbe dilig entinsecur‐
ing ach ild car efull ybef oreeve ryjou rney . To
improve protect ion forch ildr enyoung erthan
12 yearsold orunde r5 ft (1.50 m)inheight ,
Mer cedes- Benzre comme ndsyouobse rveth e
fo llo wing informatio n:
R Alw ayssecur eth ech ild inach ild restra int
sy stem suitable forth is Mer cedes -Benz vehi‐
cle.
R The child restra int system mus tbe appr opri‐
at eto theag e, we ight andsize ofthech ild.
R The vehicle seatmustbe suit able forins tal‐
ling ach ild restra int system.
Ac cid ent statis ticssho wthat childr ensecur ed
on there ar seat sar ege ner ally saf erthan chil‐
dr en secur edon thefront seats. Forth is reason ,
Mer cedes-Ben zst ro ng lyadvis esthat youins tall
a ch ild restra int system onare ar seat .
Th ege ner icterm child restra int system
The gener icterm child restra int system isused
in this Opera tor's Manua l.A ch ild restra int sys‐
te m is, forex am ple:
R Abab ycar seat
R Arear wa rd-faci ng child seat 50
Occupant safety

R
Aforw ard-f acin gch ild seat
R Ach ild boos terseat withabac kres tand seat
belt guide
Mer cedes-Benz recomme ndsusing ach ild
boos terseat withabac kres t.
The child restra int system mus tbe appr opriate
to theag e, we ight andsize ofthech ild.
Obser velaws and legalrequ irement s
Alw aysobser vetheleg alrequ iremen tswhen
using ach ild restra int system intheve hicle.
Obser vestandar dsforch ild restra int sys‐
te ms
All child restra int systems mustmee tth efo llo w‐
ing standar ds:
R U.S. Feder alMo torVe hicle SafetySt andar ds
21 3and 225
R Canadi anMo torVe hicle SafetySt andar ds
21 3and 210.2
Conf irmatio nth at thech ild restra int system
com plies withth est andar dscan befound onan
ins truct ion label onthech ild restra int system.
This confirm atio ncan also befound intheins tal‐ lation
instruct ions that areinc luded withth e
ch ild restra int system. De
tectin grisk s,avo iding danger Secur
ingsystems forch ild restra int systems
in theve hicl e
Only usethefo llo wing secur ingsystems forch ild
re stra int systems:
R The LATC H-type (ISOFIX )secu ring rings
R The vehicle's seatbeltsystem
R The TopTe ther anc horages
Ins talling aLA TC H-type (ISOFIX )ch ild restra int
sy stem isprefer red.
Sim plyatt aching tothesecur ingrings onthe
ve hicle canreduce therisk ofins talling thech ild
re stra int system incor rectl y.
When securingach ild withth eint egr ated seat
belt oftheLA TC H-type (ISOFIX )ch ild restra int
sy stem, alwayscom plywithth eper missible
gr oss weight forth ech ild and child restra int sys‐
te m (/ page55). A
boos terseat maybe necessar yto achie ve
pr oper seatbeltposition ingforch ildr enove r
40 lbs (18 kg )in we ight orunt ilth ey reac ha
heigh twher eath re e-point seatbeltcanbe
ins talled proper lywit hout aboos terseat.
Mer cedes-Benz recomme ndsasu itab lech ild
boos terseat withabac kres tand seat beltguide.
Ad vantag eof are ar wa rd-faci ng child
re stra int system
It is prefer able totrans portabab yor asmall
ch ild inasuit able rear wa rd-faci ng child restra int
sy stem. Inthis case, thech ild sits intheoppo‐
sit edir ect ion tothedir ect ion oftra veland faces
ba ckwa rds.
Babies andsmall childr enhave com parativ ely
we ak nec kmusc lesinrelation tothesize and
we ight oftheir head. Therisk ofinjur yto thecer‐
vical spine during anacciden tcan bereduced in
a re ar wa rd-faci ng child restra int system. Occ
upant safety 51

Alw
ayssecur each ild restra int system cor‐
re ctl y &
WARNIN GRisk ofinju ryor deat hdue to
inc orrect ins tallation ofthech ild
re stra int system
The child can then notbe protect edor
re stra ined asintended . #
Besureto com plywith themanuf actur‐
er's installation instruct ions forth e
ch ild restra int system and itscor rect
us e. #
Makesur eth at theent ire base ofthe
ch ild restra int system alwaysre stson
th esitt ing surface oftheseat. #
Neverpla ceobjects (e.g.cushi ons)
under orbehi ndthech ild restra int sys‐
te m. #
Use child restra int systems onlywit h
th eor iginal coverdesi gned forth em. #
Alw aysre place damag edcovers wit h
ge nui ne covers. &
WARNIN GRisk ofinju ryor deat hdue to
uns ecur edchild restra int systems inthe
ve hicle
If th ech ild restra int system isincor rectl y
ins talled ornotsecur ed,itcan com eloose.
The child restra int system could beflung
ar oun dand hitvehicle occupants. #
Alw aysins tallch ild restra int systems
cor rectl y,eve nwh en notin use. #
Alw ayscom plywit hth ech ild restra int
sy stem manuf acturer'sinstallation
ins truct ions . R
Alw aysobser vethech ild restra int system
manuf acturer'sinstallation andopera ting
ins truct ions aswellas theve hicle-specif ic
inf ormation:
- Installing theLA TC H-type (ISOFIX )ch ild
re stra int system onthere ar seat
(/ page55).
- Sec uring thech ild restra int system with
th eseat beltonthere ar seat
(/ page58). -
Sec uring thech ild restra int system with
th eseat beltonthefront passeng erseat
(/ page60). Obser vethespecif ic
ins truction sfo rth ere ar wa rd-faci ng and
fo rw ard-f acin gch ild restra int systems
(/ page60).
If th efront passeng erseat isoccupied,
ensur e,bo th bef oreand during thejour‐
ne y,that thest atus ofthefront
passeng erairbag iscor rect forth ecur‐
re nt situa tion(/ page 46).
R Obse rveth ewa rning labels intheve hicle
int erior and onthech ild restra int system.
R Also secur eTo pTe ther ifpr esent .
Do notmodif yth ech ild restra int system &
WARNIN GRisk ofinju rydue tomodif i‐
cations tothech ild restra int system
The child restra int system can nolong er
func tion proper ly.Thi spos esan incr eased
ri sk ofinjur y. #
Nevermodify ach ild restra int system. 52
Occupant safety

#
Onlyaf fix acce ssories whic hha ve been
speciall yappr oved forth is ch ild
re stra int system bythech ild restra int
sy stem's manuf acturer. Onl
yuse child restra int systems whichar ein
pr oper working condit ion &
WARNIN GRisk ofinju ryor deat hcaused
by theuse ofdamag edchild restra int
sy stems
Child restra int systems ortheir retainin gsy s‐
te ms that have been subjec tedto stre ss in
an accident mayno tbe able toper form their
int ended protect ive func tion.
It ma ybe thecase that thech ild can notbe
pr oper lyrestra ined. #
Alw aysimmediat elyre place child
re stra int systems that have been dam‐
ag ed orinvo lved inan acc ident . #
Have thesecur ingsystems forth ech ild
re stra int systems checkedat aqu alif ied
spec ialistwo rkshop beforeins talling a
ch ild restra int system again. Av
oid direct sunli ght &
WARNIN GRisk ofburnswhen thech ild
seat isex posed todirect sunlight
If th ech ild restra int system isex posed to
dir ect sunlight orheat, partscould heatup.
Childr encould sufferbur nsfrom these parts,
par ticular lyon theme tallic partsof thech ild
re stra int system. #
Alw aysmak esur eth at thech ild
re stra int system isno tex posed to
dir ect sunlight . #
Protect thech ild restra int system, e.g.
wit hablank et. #
Ifth ech ild restra int system has been
ex posed todirect sunlight ,allo witto
cool beforesecu ring ach ild init. #
Neverlea vechildr enunat tende din the
ve hicle. Obser
vewhen stopping orpar king &
WARNIN GRisk ofacci dent andinjury
due tochildr enleftunat tende din the
ve hicle
If ch ildr enarelef tunsuper visedintheve hi‐
cle, they cou ld,in pa rticular :
R open doors,ther eb yendang ering other
per sons orroad user s.
R getou tand bestru ck byoncom ingtraf‐
fi c.
R ope rate vehicle equipment andbecome
tr apped, forex am ple.
In addit ion,th ech ildr encould alsosetth e
ve hicle inmo tion, forex am ple by:
R releasing thepar king brak e.
R chang ingthetra nsmiss ionposition .
R star tin gth eve hicle. #
Neverlea vechildr enunat tende din the
ve hicle. Occupant
safety 53

#
When leaving theve hicle, alwaysta ke
th eSmar tKey wit hyo uand lockth e
ve hicle. #
Keep theve hicle SmartKey out ofreac h
of childr en. &
WARNIN GDang ertolife due toexpo‐
sur eto extreme heat or col din theve hi‐
cle
If people, particular lych ildr en, areex posed
to extreme temp eratur esove ran extende d
pe riod oftime, ther eis arisk ofser ious
injur yor dang ertolife. #
Neverlea veper sons, childr eninpar tic‐
ular ,unat tende din theve hicle. Ov
ervie wof suitable seatsintheve hicl efo r
ins talling ach ild restra int system Lef
t/right rear seat
Pr efer redsecur ingsystem:
® LATC H-type (ISOFIX )ch ild seat anchor ¯
Alsosecur eTo pTe ther ifpr esent
(/ page57 ).
Al te rn ativ esec uring system:
0076 Ve
hicle seatbelt
Fr ont passeng erseat
Sec uring system:
0076 Ve
hicle seatbelt
Be sureto obser ve:
R Ifth efront passeng erseat isoccupied,
ensur e,bo th bef oreand during thejour ney,
th at thest atus ofthefront passeng erairbag
is cor rect forth ecur rent situa tion
(/ page 46).
R Obse rveth eno teson aut omatic front
passeng erairbag shutoff(/ page44 )
Cent errear seat
Secur ingsystem:
0076 Ve
hicle seatbelt
¯ Alsosecur eTo pTe ther ifpr esent
(/ page57 ). Ac
tiv atin gor deac tivatin gthe special seat
be ltre tract or &
WARNIN GRisk ofinju ryor deat hif a
seat beltisunf astened while th eve hicle
is in mo tion
If th eseat beltisreleased whiletheve hicle is
in mo tion, thech ild safetyloc kis deac tiva ted
and thech ild restra int system isno long er
cor rectly secu red. The seat beltisdraw nin
sl ig htly bytheiner tiareel and cann otbe
immediat elyclosed again. #
Stop theve hicle immediat elyinaccor d‐
ance withth etraf fic condi tions. #
Activateth especial sealbeltretract or
ag ain and correctl ysecu rethech ild
re stra int system. 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. 54
Occupant safety

The
seat belts onthefo llo wing seats areeq uip‐
ped withaspec ialseat beltretract or:
R Front passeng erseat
R Rear seat s
Ins tallin gach ild restra int system: #
When installing ach ild restra int system,
alw aysobser vethemanuf acturer'sinstalla‐
tion andopera tingins truct ions aswellas the
inf ormatio nin this Opera tor's Manua l. #
Pullth eseat beltsmoo thly from theseat belt
outle t. #
Engage theseat belttongu ein theseat belt
buc kle.
Ac tiv atin gthe special seat beltre tract or: #
Pullth eseat beltoutfully andletth einer tia
re el retract itag ain.
Wh enthespecial seatbeltretract orisacti va‐
te d, youwill hear ara tche ting sound. #
Push thech ild restra int system down until
th eseat beltsitstight ly. Deactiv
atingthespecial seatbeltretract or: #
Press there lease buttonoftheseat belt
buc kle. #
Hold theseat belttongu eand guide ba ck to
th eseat beltoutle t. Ins
talling aLA TC H-type (ISOFI X)child
re stra int system onthere ar seat Ins
tallingaLA TC H-type (ISOFI X)child
re stra int system onthere ar seat &
WARNIN GRisk ofacci dent ifth ere ar
ben chseat, rear seat andseat backres t
ar eno teng aged
The rear ben chseat, rear seat andseat back‐
re st ma yfo ld forw ards, evenwh en youar e
dr ivin g.
R Asare sult, theve hicle occupant willbe
pushed intoth eseat beltwithincr eased
fo rc e. The seat beltwillnotbe able to
pr otect asintended andcould cause
additional injury. R
Objects orloads inthetrunk orcar go
com partmen twill notbe restra ined by
th eseat backres t. #
Mak esur eth at there ar ben chseat, the
re ar seat andtheseat backres tar e
eng aged bef oreeve rytrip . If
th elef tand right seat backres ts areno t
eng aged and lockedin place, this will besho wn
on themultifunc tiondispla yon theins trument
clus ter.
If th ecent erseat backres tis no teng aged and
loc kedin place, there dloc kve rificati onindi ca‐
to rwil lbe visib le. &
WARNIN GRisk ofinju ryor deat hif th e
per missible gross mass ofthech ild and
ch ild restra int system toget her isexc ee‐
ded.
To omuc hload maybe placed ontheLA TC H-
type (ISOFIX )ch ild restra int system and the
ch ild ma yno tbe restra ined correctly inthe
ev ent ofan acciden t,forex am ple. Oc
cupan tsaf ety 55

#
Ifth ech ild and thech ild restra int sys‐
te m toget her weigh mor eth an theper‐
missible gross mass of73 lb(33 kg),
onl yuse aLA TC H-type (ISOFIX )ch ild
re stra int system withwhic hth ech ild is
secur edwithth eve hicle seatbelt. #
Also secur eth ech ild restra int system
wit hth eTo pTe ther belt, ifav ailable. Alw
ayscom plywit hth einf ormation aboutthe
mass ofthech ild restra int system:
R inthemanuf acturer'sinstallation andoper at‐
ing instruct ions forth ech ild restra int system
used
R onalabel onthech ild restra int system, if
pr esent
Re gular lych eckth at theper missible gross mass
of thech ild and child restra int system isstill
com plied with. When
installing ach ild restra int system, obser ve
th efo llo wing:
0073 Alw
aysobser vethecor rect useof theseats
and consider their suit ability foratt aching a
ch ild restra int system.
0073 Alw
ayscom plywithth emanuf acturer's
ins tallation andoper atingins truct ions for
th ech ild restra int system used.
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.
® When installing aLA TC H-type (ISOFIX )
ch ild restra int system, also obser vethefo llo w‐
ing:
0073 When
usingabab ycar seat inwe ight
gr oup 0/0+ andare ar wa rd-faci ng child
re stra int system inwe ight group Ion a
re ar seat :adju stthefront seat sothat the
seat does notto uc hth ech ild restra int sys‐
te m.
0073 When
usingafo rw ard-f acin gch ild
re stra int system inwe ight group I:
re mo vethehead restra int from there spec‐ tiv
eseat, ifpossible .In addition, thebac k‐
re st of thech ild restra int system mus tlie as
fl at as poss ibleagains tth ebac kres tof the
ve hicle seat.
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 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 epossi ble,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. 56
Occupant safety

1
LATC H-type (ISOFIX )mou nting brac ket
Bef oreev eryjour ney,mak esur eth at theLA TC H-
type (ISOFIX )ch ild restra int system iseng aged
cor rectl yin bo th mounting brac kets intheve hi‐
cle. *
NO
TEDama getotheseat beltforth e
cent ersea tdu ring installation ofthe
ch ild restra int system #
Mak esur eth at theseat beltisno ttra p‐
ped. #
Attach theLA TC H-type (ISOFIX )ch ild
re stra int system toboth mounting brac kets
in theve hicle. Secur
ingTopTe ther &
WARNIN GRisk ofinju ryor deat hif th e
re ar seat backres ts areno tloc kedaf te r
To pTe ther belts areins talled
The rear seat backres ts ma yfo ld forw ards
when youar edr ivin g.
As are sult, child restra int systems willno
long erbe able toper form their intended pro‐
te ctiv efuncti on.Thisma yal so cau seaddi‐
tiona linju ries. #
Alw aysloc kre ar seat backres ts afte r
ins talling TopTe ther belts. #
Obser vetheloc kve rificati onindi cator. If
th elef tand right seat backres ts areno t
eng aged and lockedin place, this will besho wn
on themultifunc tiondispla yon theins trument
clus ter.
If th ecent erseat backres tis no teng aged and
loc kedin place, there dloc kve rificati onindi ca‐
to rwil lbe visib le.
¯ Ifth ech ild restra int system iseq uipped
wit haTo pTe ther belt :
The risk ofinjur yma ybe reduced byTop
Te ther.The TopTe ther belt enables an
additional connect ionbetween thech ild
re stra int system attached withLA TC H-
type (ISOFIX )and theve hicle. Occupant
safety 57

#
Ifnecessar y,slide head restra int 1 upw ards
(/ page95). #
Foldup cover2 ofTopTe ther anc horage
3. #
Installth eLA TC H-type (ISOFIX )ch ild restra int
sy stem withTo pTe ther.In doing so,com ply
wit hth ech ild restra int system manuf actur‐
er's installation instruct ions . #
Guide TopTe ther belt 4under head
re stra int 1 between thetw ohead restra int
bar s. #
Hook TopTe ther hook 5ofTopTe ther belt
4 intoTo pTe ther anc horage3 without
twis ting. #
Tensi on TopTe ther belt 4.Indoing so,com‐
pl ywit hth ech ild restra int system manuf ac‐
tur er's installation instruct ions . #
Folddo wn cover2 ofTopTe ther anc horage
3. #
Ifneces sary,slide head restra int 1 down‐
wa rds(/ page95). Makesur eth at youdo no
tint erfere wit hth ecor rect routin gof Top
Te ther belt 4. Secur
ingthech ild restra int system withth e
seat belt Secur
ingthech ild restra int system withth e
seat beltonthere ar seat &
WARNIN GRisk ofacci dent ifth ere ar
ben chseat, rear seat andseat backres t
ar eno teng aged
The rear ben chseat, rear seat andseat back‐
re st ma yfo ld forw ards, evenwh en youar e
dr ivin g.
R Asare sult, theve hicle occupant willbe
pushed intoth eseat beltwithincr eased
fo rc e. The seat beltwillnotbe able to
pr otect asintended andcould cause
additional injury.
R Objects orloads inthetrunk orcar go
com partmen twill notbe restra ined by
th eseat backres t. 58
Occupant safety