MERCEDES-BENZ C-CLASS SEDAN 2019 Repair Manual

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
(0013 page54 ). 0007
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 . 0007
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 000A
WARNIN GRisk ofinju ryor deat hfrom
using are ar wa rd-faci ng child restra int
sy stem when thefront passeng erfront
airbag isenabled
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.
Alw aysensur eth at thefront passeng erair‐
bag isdeactiv ated. The PASSENGER AIRBAG
OFF indicat orlam pmus tbe lit.
NEVER useare ar wa rd-faci ng child restra int
sy stem onaseat protect edbyan ENABLED
FR ONT AIRB AG infront ofit,DE ATHor SERI‐
OUS INJURYtotheCH ILD can occur . Obser
vethespecif icins truction sfo rth ere ar‐
wa rd-faci ng and forw ard-f acin gch ild restra int
sy stems (0013 page60).
Wa rning notic eon thefront passeng ersun visor
Alw aysobser vethest atus ofthefront passeng er
fr ont airbag onthePA SSENGER AIRBAGOF F
ind icat orlam p:
R When usingare ar wa rd-faci ng child restra int
sy stem onthefront passeng erseat, thefront
passeng erfront airbag mustalw aysbe disa‐
bled. Thisisonl yth ecase ifth ePA SSENGER
AIR BAGOF Find icat orlam pis lit con tinu‐
ousl y(0013 page44 ).
R Ifth ePA SSENGER AIRBAGOF Find icat or
lam pis off,th efront passeng erfront airbag
is enabled. Thefront passeng erfront airbag
ma ydeplo ydur ing anacciden t. Occ
upant safety 59

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
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 inGroup I:re mo vethehead
re stra int from there spectiv eseat, ifpossi‐
ble.
When youre mo vethech ild restra int sys‐
te m, installth ehead restra int again immed i‐
at elyand adjus tall thehead restra int scor ‐
re ctly .
0073 The
backrest of thefo rw ard-f acin gch ild
re stra int system mus tlie asflat as poss ible
ag ains tth ebac kres tof thefront passeng er
seat.
0073 Fo
rcer tain child restra int systems inwe ight
gr oup IIor III,th er ema ybe restrictions in
th emaximum sizesetting, e.g. due topossi‐
ble con tact with thero of. 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. Adjus tth eseat backres t
inclin ation accordingly.
0073 The
child restra int system mus tno tbe put
under stra in by thehead restra int s.Ad jus t
th ehead restra int sacc ording ly.
0073 Ne
verpla ceobjects underorbehi ndthe
ch ild restra int system, e.g.cushions .
The seat beltonthefront passeng erside is
eq uipped withaspecial seatbelt retract or.
Wh enacti vated, thespecial seatbelt retract or
ens ures that theseat beltdoes notslac kenonce
th ech ild restra int system issecur ed
(0013 page54 ). 0007
Setth efront passeng erseat asfarbac kas
possi bleand movetheseat intoth ehighes t
position . 0007
Fully re tract theseat cushion lengthadjus t‐
ment . 0007
Adjus tth eseat cushion inclination sothat
th efront edgeof theseat cushion isin the highes
tposition andthere ar edg eof the
seat cushion isin thelowe stposition . 0007
Setth eseat backres tto an almos tve rtical
posit ion. 0007
Installth ech ild restra int system.
The entire base ofthech ild restra int system
mus talw aysre st on theseat cushion ofthe
fr ont passeng ersea t. 0007
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. 0007
Ifneces sary,adjus tth eseat beltoutle tand
th efront passeng erseat accor dingly. 60
Occupant safety

Child
safetyloc ks Ac
tiv atin g/deac tivatin gthe child safetyloc k
fo rthe rear door s 000A
WARNIN GRisk ofacci dent andinjury
due tochildr enand animals leftunat ten‐
de din theve hicle
If yo ulea vechildr enand animals unattende d
in theve hicle, they ma ybe ableto setth e
ve hicle inmo tion, forex am ple by:
R Releasing thepar king brak e.
R Shif ting theaut omatic transmission out
of par kposition 005D.
R Startin gth eengine.
In addition, they ma yoper ateve hicle equip‐
ment andbecome trapped. 0007
Neverlea vechildr enand animals unat‐
te nde din theve hicle. 0007
When leaving theve hicle, alwaysta ke
th eSmar tKey wit hyo uand lockth e
ve hicle. 000A
WARNIN GRisk offata linj urydue to
ex posur eto extreme heat or col din the
ve hicle
If people –par ticular lych ildr en–ar e
ex posed toextreme temp eratur esover an
ex tende dpe riod oftime, ther eis arisk of
ser ious oreve nfa ta linj ury. 0007
Neverlea veanyone –pa rticular lych il‐
dr en –unat tende din theve hicle. 0007
Neverlea veanim alsintheve hicle unat‐
te nde d. 000A
WARNIN GRisk ofacci dent andinjury
due tochildr enleftunat tende din the
ve hicle
When childr enaretra veling intheve hicle,
th ey cou ld:
R ope ndoo rs,th er eb yendang ering other
people orroad user s
R get out oftheve hicle andbehit bytraf fic
R oper ateve hicle equipment andbecome
tr apped, forex am ple 0007
When childr enaretra veling intheve hi‐
cle, alwaysactiv ateth eav ailable child
saf etyloc ks. 0007
Neverlea vechildr enunat tende din the
ve hicle. 0007
When leaving theve hicle, alwaysta ke
th eke ywit hyo uand lockth eve hicle. Child
safetyloc ksforth ere ar door sand there ar
side windowsareav ailable.
The child safetyloc kon there ar door ssec ures
eac hdoor separat ely. The door scan nolong er
be opened from theinside. Occ
upant safety 61

0007
Press theleve rin dir ection 1(activ ate) or
2 (dea ctivate). 0007
Mak esur eth at thech ild safetyloc ksare
wo rking proper ly. Ac
tiv atin g/deac tivatin gthe child safetyloc k
fo rthe rear side windo ws 0007
Toactiv ate/ deacti vate:pr ess button 2.
The rear side windowcan beope ned or
clos edinthefo llo wing cases :
R withindic ator lam p1 lit:via theswitc h
on thedr iver's door R
withindicat orlam p1 off:via theswitc h
on thecor responding rear door ordriv‐
er' sdoor No
teson pets intheve hicl e 000A
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
do wn butt ons orswitc hes.
Ther ebyan animal may:
R activ ateve hicle equipment andbecome
tr apped, forex am ple
R swit chsystems onoroffand endang er
ot her road user s
Uns ecur edanimals maybe throw nar ou nd in
th eve hicle intheeve ntofan acci dent or
su dd en steer ing and braking maneuv erand
injur eve hicle occupants inthepr ocess. 62
Occupant safety

0007
Neverlea veanim alsintheve hicle unat‐
te nde d. 0007
Alw ayscor rectly secu reanim alswhile
dr ivin g,forex am ple usin gasuit able
anim alcar rier . Occ
upant safety 63

Smar
tKey Ov
ervie wof Smar tKey functio ns 000A
WARNIN GRisk ofacci dent andinjury
due tochildr enleftunat tende din the
ve hicle
If ch ildr enarelef tunat tende din theve hicle,
th ey cou ld:
R Ope ndoo rs,th er eb yendang ering other
per sons orroad user s.
R Getout oftheve hicle andbehit by
oncom ingtraf fic.
R Ope rate vehicle equipment andbecome
tr apped, forex am ple.
In addit ion,ch ildr encould alsosetth eve hi‐
cle inmo tion, forex am ple, by:
R Releasing thepar king brak e.
R Shif ting theaut omatic transmiss ionout
of par kposition 005Dorshif ting manual
tra nsmiss ionintoneutral .
R Startin gth eengine 0007
When leaving theve hicle, alwaysta ke
th eSmar tKey wit hyo uand lockth e
ve hicle. 0007
Neverlea vechildr enand animals unat‐
te nde din theve hicle. 0007
Keep theSmar tKey out ofreac hof chil‐
dr en. 000E
NO
TEDama getotheke ycaus edby
magne ticfields 0007
Keep theke yaw ay from stro ng ma g‐
ne tic fields. 1
Locks
2 Batt erych ecklam p
3 Unlocks
4 Opens/closes thetrunk lid
5 Panic alar m
0009 The Sma rtKe yma yva ry from theone shown
in thediagr am,depending ontheve hicle
eq uipment.
The Smar tKey loc ksand unlocksth efo llo wing
com pone nts:
R thedoor s
R thetrunk lid
R thefuel filler flap 64
Opening andclosing

If
th eve hicle isno topened within appr oximat ely
40 seco ndsafte runloc king,itloc ksagain. Anti-
th eftpr otect ion isactiv ated again.
Do notke ep theSmar tKey toge ther wit helec‐
tr onic devices orme talobje cts. This canaffect
th eSmar tKey 's functionality .
0009 Ifbatt erych ecklam p2 does notlight up
af te rpr essing the0036 or0037 button,the
batt eryis disc harged.
Re placing theSmar tKey batt ery
(0013 page66). Ac
tiv atin g/deac tivatin gthe acoustic lock ing
ve rificat ion signa l Mult
imed iasystem:
0018 Vehicle 0019
î Vehicle Setting s
0019 Aco ustic Lock 0007
Activate0073 ordeacti vate 0053 thefunc tion. Ac
tiv atin g/deac tivatin gthe pani calar m Re
quirement s:
R The ignit ionisswitc hedoff 0009
The panic alarmfunc tion isonl yav ailable in
cer tain coun tries. 0007
Toactiv ate: press butt on1 forapp rox‐
ima tely one second.
A visual andaudibl ealar mistrigg ered. 0007
Todeac tivate: briefly pr ess button1 again.
or 0007
Press thest ar t/ stop butt ononthecoc kpit
(t he Smar tKey isinsid eth eve hicle). Changing
theunloc kingsettings Po
ssible unlockingfunctions oftheSmar tKey :
R Cen tralunlo cking R
Unloc kin gth edr iver's door andfuel filler flap 0007
Toswitc hbe tw een settings: press the
0036 and0037 buttonssimul taneousl yfo r
appr oximat elysix seco ndsuntilth ebatt ery
ch ecklam pflashes twice.
If th eunloc kingfunction forth edr iver's door
and fuel filler flap has been selected:
R Pressing the0036 buttonasecon dtime cen‐
tra lly unloc kstheve hicle
R Vehicl eswith KEYLESS-GO :If yo uto uc h
th einner surface ofthedoor handle onthe
dr iver's door ,onl yth edr iver's door andfuel
fi ller flap areunlo cked. Deactiv
atingtheSm artK ey functio ns If
yo udo notuse theve hicle oraSmar tKey for
an extende dpe riod oftime, youcan reduce the
ener gycon sum ption ofthere spectiv eSmar t‐
Ke y.To do so, deactiv ateth eSmar tKey func‐
tions. Openi
ngand closi ng 65

0007
Todeac tivate: press the0037 buttononthe
Smar tKey twi ce inqu ick succ ession .
The batterych ecklam pof theSmar tKey
fl ashes twicebr ief lyand light sup once. 0007
Toactiv ate: press anybutt onontheSmar t‐
Ke y.
0009 When theve hicle isstar tedwit hth eSmar t‐
Ke yin thestow agecom partment ofthecen‐
te rconsole, theSmar tKey functions are
au tomatical lyact ivat ed (0013 page14 5). Re
mo ving /ins ertin gthe eme rgency key 0007
Toremo ve:pr ess release button1.
Em erge ncy key2 ispush edout slightly. 0007
Pull outemer gency key2 untilit en gage sin
th eint ermediat eposition .
0009 Youcan usetheint ermediat eposition of
emer gency key2 toatt achth eSmar tKey to
a ke yring. 0007
Press release button1 again and fully
re mo veemer gency key2. 0007
Toinser t:press release button1. 0007
Insertemer gency key2 totheint ermediat e
position orfull yuntil iteng ages. Re
plac ingthe Smar tKey batt ery 000A
DANG ER Serious damag eto healt h
caused byswallo wing batteries
Batt eries cont aintoxic and corrosiv esub‐
st anc es.Swallo wing batteries ma ycause
ser ious damag eto healt h.
Ther eis arisk offata linj ury. 0007
Keep batt eries out ofthere ac hof chil‐
dr en. 0007
Ifbatt eries aresw allo wed,seek medical
att ent ion immediat ely. 000F
ENVIR
ONMEN TALNO TEEnvironme ntal
da ma gecau sed byimproper disposal of
batt eries Bat
teries con tain polluta nts. Itis
illeg alto dispose ofthem withth ehousehold
ru bbish. 0007
Dispose
ofbatt eries inan
en vironmen tally re sponsible manner.
Ta ke disc hargedbatt eries toaqu alif ied
spec ialistwo rkshop ortoacol lection
poin tfo rused batteries. 66
Opening andclosing

Re
quirement s:
R Youre qu ire aCR 203 23V cell battery.
Mer cedes-Ben zre comme ndsthat youha ve the
batt eryre placed ataqu alif ied spec ialistwo rk‐
shop. 0007
Remo vetheemer gency key(0013 page66 ). 0007
Press release button2 down fullyand slide
co ver1 inthedir ect ion ofthear row . 0007
Foldout cover1 inthedir ect ion ofthe
ar row and remo ve. 0007
Remo vebatt erycom partmen t3 and take
out thedisc hargedbatt ery. 0007
Inser tth ene wbatt eryint obatt erycom part‐
ment 3.Obser vethepositiv epole marking
in thebatt erycom partmen tand onthebat‐
te ry when doingth is. 0007
Push inbatt erycom partment 3. 0007
Re-att achco ver1 and push ituntil it
eng ages. Pr
obl ems with theSm artK ey Pr
oblem
Possible causes/conseq uencesand0050 0050
Solutions
Yo ucan nolongerloc kor unloc kth e
ve hicle. Po
ssible causes are:
R The Smar tKey batt eryis disc hargedor near lydisc harged.
R Ther eis int erfere nce from apo we rful radio signal source. Openin
gand closin g67

Pr
oblem
Possible causes/conseq uencesand0050 0050
Solutions
R The Smar tKey isdef ective. 0007
Chec kth ebatt eryusing thebatt erych ecklam pand replace ifnec essar y(0013 page66). 0007
Use theemer gency keyto loc kor unloc k(0013 page66). 0007
Have theSmar tKey checkedat aqu alif ied spec ialistwo rkshop.
Yo uha ve los ta Smar tKey . 0007
Have theSmar tKey deactiv ated ataqu alif ied spec ialistwo rkshop. 0007
Ifnecessar y,ha ve themec hanical lockch ang edaswell. 68
Openingand closing