MERCEDES-BENZ S-CLASS 2020 Repair Manual

no
tint er fere wit hthe cor rect routin gofTop
Te ther belt 4. Secur
ingthec hild restra int system withthe
seat belt Secu
ring thec hild restra int system withthe
seat beltonther ear seat
Wh eninst alling abelt- secur edchild restra int
sy stem, obser vethef ollo wing:
0073 Alw
aysc om plyw itht he manuf acturer's
ins tallation andoper atinginstruct ions for
th ec hild restra int system used.
0073 When
usingacategor y0/0+ babycar
seat andacategor yIrearward-faci ng
ch ild restra int system onarear seat:
ad jus tthe front seat sothat thes eat does
no ttouc hthe child restra int system.
0073 When
usingacategor yIforwa rd-facin g
ch ild restra int system: remo vetheh ead
re stra int from ther espectiv eseat, ifpossi‐
ble. Af
tert he child restra int system has been
re mo ved, replace theh ead restra int simme‐
diat elya nd adjus tthem correctly .
0073 The
backrest of thef orwa rd-facin gchild
re stra int system mus t,as fara sp ossi ble, be
re sting onthes eat backres to fthe rear
seat .
0073 Fo
rc ertain child restra int systems inwe ight
cat egor yIIo rIII,t her em aybe restrictions
on them aximum sizesetting, e.g. due to
possible contact with ther oof.
0073 The
child restra int system mus tnotbe put
under stra in be tween ther oof and thes eat
cushion and/orbeinstalled facing the
wr ong direct ion. Wher eposs ible, adjus tthe
seat cushion inclination accordingly.
0073 The
child restra int system mus tnotbe put
under stra in by theh ead restra int .A dju st
th eh ead restra int sa ccording ly.
0073 Mak
esuret hat thec hild's feet do nottouc h
th ef ront seat. Ifneces sary,mo vethef ront
seat slightl yforwa rds. The
seat beltsonthe follo wing seats aree quip‐
ped withac hildseat safetyf eatur e:
R Front passeng erseat
R Rear seat s
Ve hicl eswith seatbeltbuckle extender s:
when securingachild inac hild restra int system
on arear seat, obser vethef ollo wing notes:
R Mak esuret hat thes eat belt isfastened on
th ec hild restra int system accor dingtothe
manuf acturer'sinstallation instruct ions for
th ec hild restra int system.
R Forc hild restra int systems withab eltclam p:
eng aget he seat belttongu eintot he seat belt
buc klebeforey ou tight enthes eat belt using
th eb elt clam p.
When enabled, thec hild seat safetyf eatur e
ensur esthat thes eat belts ofthef ront
passeng erseat andrear seat sdon otslac ken
once thec hild restra int system issecur ed
(/ page55). Occ
upant safety 59

#
Installth ec hild restra int system.
The entireb ase ofthec hild restra int system
mus talway sr esto nthe sitting surface ofthe
re ar seat . #
Alw aysm akes uret hat thes houlder belt
st ra pi sc orrectly routed from thes eat belt
outle tofthe vehicle tothes houlder belt
guide onthec hild restra int system.
The shoulder beltstra pm ustb erout edfor‐
wa rdsa nd down wardsf romt heseat beltout‐
le t.
No teso nrear ward-faci ng and forw ard-f acin g
ch ild restra int systems onthef ront
pa sseng erseat &
WARNIN GRisk ofinju ryor deat hfrom
using arear ward-faci ng child restra int
sy stem when thef ront passeng erfront
airbag isenabled
If yo us ecureac hildinar ear ward-faci ng
ch ild restra int system onthef ront passeng er
seat andtheP ASSENGER AIRBAGO FFind i‐
cat orlam piso ff,t he front passeng erairbag
can deplo yint he event ofan acciden t. The
child could bestru ck bythea irbag.
Alw ayse nsur ethat thef ront passeng erair‐
bag isdeactiv ated. The PASSENGER AIRBAG
OFF indicat orlam pm ustb elit.
NEVER usearear ward-faci ng child restra int
sy stem onaseat protect edbyan ENABLED
FR ONT AIRB AG infront ofit,DE ATHo rSERI‐
OUS INJURYtotheC HILD canoccur . Obser
vethes pecif icins truction sfor ther ear‐
wa rd-faci ng and forw ard-f acin gchild restra int
sy stems (/page60).
Alw ayso bser vethes tatus ofthef ront passeng er
airbag ontheP ASSENGER AIRBAGO FFind ica‐
to rlam p:
R When using arear ward-faci ng child restra int
sy stem onthef ront passeng erseat, thef ront
passeng erairbag mustalway sb ed isabl ed.
This isonl ythe case ifth eP ASSENGER AIR
BA GO FFind icat orlam pislitcon tinuousl y
(/ page45).
R Ifth eP ASSENGER AIRBAGO FFind icat or
lam piso ff,t he front passeng erairbag isena‐ bled.
Thefront passeng erairbag maydeplo y
dur ing anacciden t.
Secur ingthec hild restra int system withthe
seat beltonthef ront passeng erseat
When installing abelt- secur edchild restra int
sy stem onthef ront passeng erseat, always
obser vethef ollo wing:
0073 Obser
vethec hild restra int system manuf ac‐
tur er's installation andoper atinginstruc‐
tion s.
0073 When
usingaforwa rd-facin gchild restra int
sy stem incat egor yI:remo vetheh ead
re stra int from ther espectiv eseat, ifpossi‐
ble.
Af tert he child restra int system has been
re mo ved, replace theh ead restra int simme‐
diat elya nd adjus tthem correctl y.
0073 The
backres to fthe forw ard-f acin gchild
re stra int system mus t,as fara sp ossi ble, be
re sting onthes eat backres to fthe front
passeng erseat.
0073 Fo
rc ertain child restra int systems inwe ight
cat egor yIIo rIII,t her em aybe restrictions 60
Occup antsafety

on
them aximum sizesetting, e.g. due to
possible contact with ther oof.
0073 The
child restra int system mus tnotbe ten‐
si oned betwee nt he roof and thes eat cush‐
ion and/or beinstalled facing thew rong
dir ect ion.
0073 The
child restra int system mus tnotbe put
under stra in by theh ead restra int s.Ad jus t
th eh ead restra int sa ccording ly.
0073 Ne
verp lace objects underorbehi ndthe
ch ild restra int system, e.g.cushions .
The seat beltonthef ront passeng erside is
eq uipped withas pecial seatbeltretract or.
Wh enena bled ,the special seatbeltretract or
fu nctio nensures that thes eat belt does not
slac keno nce thec hild restra int system is
secur ed(/ page55). #
Setthe front passeng erseat asfarb acka s
possi bleand movethes eat intot he highes t
position ifpossible. #
Fullyr etra ct thes eat cushion lengthadjus t‐
ment . #
Adjus tthe seat cushion inclination sothat
th ef ront edg eofthe seat cushion isin the
highes tposition andther ear edgeofthe
seat cushion isin thel owe stposition . #
Setthe seat backres ttot he mos tvertical
position possible. #
Installth ec hild restra int system.
The entireb ase ofthec hild restra int system
mus talway sr esto nthe sitting surface ofthe
fr ont passeng ersea t. #
Alw aysm akes uret hat thes houlder belt
st ra pi sc orrectly routed from thes eat belt
outle tofthe vehicle tothes houlder belt
guide onthec hild restra int system.
The shoulder beltstra pm ustb erout edfor‐
wa rdsa nd down wardsf romt heseat beltout‐
le t. #
Ifnecessar y,adjus tthe seat beltoutle tand
th ef ront passeng erseat accor dingly. Child
safetyl oc ks Ac
tiv atin g/deac tivatin gthe child safetyl oc k
fo rt he rear door s &
WARNIN GRisk ofacci dent andinjury
due tochildr enleftu nat tende dint he
ve hicle
If ch ildr enarel eftu nat tende dint he vehicle,
th ey cou ld:
R Ope ndoors,t her ebye ndang ering other
per sons orroad user s.
R Getoutand bestru ck byoncom ingtraf‐
fi c.
R Ope rate vehicle equipment andbecome
tr apped, fore xamp le.
In addit ion,the childr encould alsosetthe
ve hicle inmo tion, fore xamp leby:
R Releasing thep arking brak e.
R Changing thet ransmiss ionposition .
R Startin gt he vehicle. Occupant
safety 61

#
Neverlea ve childr enunat tende dint he
ve hicle. #
When leaving thev ehicle, alwayst ake
th ek eywit hyou and lockthe vehicle. #
Keep thev ehicle keyo utofreac ho f
ch ildr en. &
WARNIN GRisk offata linj ur yd ue to
ex posur etoe xtreme heat orcol dint he
ve hicle
If people –particular lych ildr en–are
ex posed toextreme temp eratur esover an
ex tende dperiodo ftime, ther ei sar iskof
ser ious oreve nfatal inj ury. #
Neverlea ve anyone –p artic ular ly ch il‐
dr en –u nat tende dint he vehicle. #
Neverlea ve anim alsinthev ehicle unat‐
te nde d. &
WARNIN GRisk ofacci dent andinjury
due tochildr enleftu nat tende dint he
ve hicle
If ch ildr enaret rave ling inthev ehicle, they
cou ld,inp artic ular :
R Open doors, ther eb ye ndang ering other
per sons orroad user s
R Getoutand bestru ck byoncom ingtraf fic
R Oper atev ehicle equipment andbecome
trapped, fore xamp le #
Alw aysa ctiv atet he child safetyl oc ks
ins talled ifch ildr enaret rave ling inthe
ve hicle. #
Neverlea ve childr enunat tende dint he
ve hicle. #
When leaving thev ehicle, alwayst ake
th eS mar tKey wit hyou and lockthe
ve hicle. Ther
earechild safetyl oc ks fort he rear door s
and ther ear side windo ws. The
child safetyl oc ko nthe rear door ssecures
eac hdoor separat ely. The door scan no long er
be opened from thei nside. #
Press thel eve rind irection 1(activ ate) or
2 (dea ctivate). #
Mak esuret hat thec hild safetyl oc ks are
wo rking proper ly. 62
Occupant safety

Ac
tiv atin g/deac tivatin gthe child safetyl oc k
fo rt he rear side windo ws #
Toactiv ate/ deacti vate:pr ess button 2.
Op eni ng/cl osing thes ide windo winthe rear
passe nger com partment isposs ible:
R With indic ator lam p1 lit:v ia thes witc h
on thed rive r's door . R
With indic ator lam p1 off:via thes witc h
on thec orresponding rear door ordriv‐
er' sd oor .
When thec hild safetyl oc kisa ctivat ed, thec on‐
tr ols inther ear com partment ared isable dfor:
R The rear side windows
R The adjus tmentofthe front passeng erseat
fr om ther ear com partment
R The roller sunblin ds:
- ofther ear side windo ws
- ofther ear windo w
- inther oof No
teso np etsi nt he vehicl e &
WARNIN GRisk ofacci dent andinjury
due toanim alsleftu nsecur edorunat ‐
te nde dint he vehicle
If yo ul eave anim alsinthev ehicle unatten‐
ded orunsecur ed,they cou ldpos siblypress
do wn buttons orswi tches . The
reby an anim alma y:
R activat ev ehicle equipment andbecome
trapped, fore xamp le
R swit chsystems onoroffa nd endang er
ot her road user s
Uns ecur edanimals maybethrow na roun din
th ev ehicle inthee vent ofan acciden tor
sudden steer ing and braking maneuv erand
injur evehicle occupants inthep rocess. #
Neverlea ve anim alsinthev ehicle unat‐
te nde d. #
Alw aysc orrectly secu reanim alswhile
dr ivin g,fore xamp leusin gas uitable
anim alcar rier . Occ
upant safety 63

Smar
tKey Ov
ervie wo fSmar tKey functio ns &
WARNIN GRisk ofacci dent andinjury
due tochildr enleftu nat tende dint he
ve hicle
If ch ildr enarel eftu nat tende dint he vehicle,
th ey cou ld:
R Ope ndoors,t her ebye ndang ering other
per sons orroad user s.
R Getoutand bestru ck byoncom ingtraf‐
fi c.
R Ope rate vehicle equipment andbecome
tr apped, fore xamp le.
In addit ion,the childr encould alsosetthe
ve hicle inmo tion, fore xamp leby:
R Releasing thep arking brak e.
R Changing thet ransmiss ionposition .
R Startin gt he vehicle. #
Neverlea ve childr enunat tende dint he
ve hicle. #
When leaving thev ehicle, alwayst ake
th ek eywit hyou and lockthe vehicle. #
Keep thev ehicle keyo utofreac ho f
ch ildr en. *
NO
TEDama getothek eycaus edby
magne ticfields #
Keep thek eyaway from stro ng ma g‐
ne tic fields. %
The Smar tKey ma yvaryf romt heone shown
in thed iagr am, depending onthev ehicle
eq uipment. 1
Locks
2 Indicat orlam p
3 Unloc ks
4 Opens/closes thet runk lid
5 Panic alar m
% Ifch eckl am p2 does notlight upafte r
pr essing theÜ orß button,theb at‐
te ry iswe ak orposs iblyd ischar ged. Re place
th eb atterya ssoon aspossible.
Re place theS mar tKey batt ery( /pag e66).
The Smar tKey loc ksand unlockst he follo wing
com pone nts:
R Doo rs 64
Opening andclosing

R
Fuelfiller flap
R Trunk lid
If th ev ehicle isno to pened within appr oximat ely
40 seco ndsafte ru nloc king, itloc ksagain. Anti-
th eftp rotection isactiv ated again.
Do notk eep theS mar tKey toget her withe lec‐
tr onic devices orme talo bje cts. This canaffect
th eS mar tKey 's functionality .
Do notk eep theS mar tKey inthet em per atur e-
con trolled cupholder .Other wise, theS mar tKey
will notb ereliably detected. Ac
tiv atin g/deac tivatin gthe aco ustic lock ing
ve rificat ion signa l Mult
imed iasystem:
4 Vehicle 5
î Vehicle Setting s
5 Aco ustic Lock #
Activate0073 ordeacti vate 0053 thef unc tion . Ac
tiv atin g/deac tivatin gthe pani calarm Re
quirement s: R
The ignit ionisswitc hedoff.
% The panic alarmfunc tion isonl yavailable in
cer tain coun tries. #
Toactiv ate: press butt on1 fora pprox‐
ima tely one second.
Av isual andaudibl ealarmi strigg ered. #
Todeac tivate: brieflyp ress but ton1 again.
or #
Press thes tart/s topb utton onthec ockpit
(t he Smar tKey isinside thev ehicle). Changing
theu nloc king settings Po
ssible unlockingfunctions oftheS mar tKey :
R Cen tralunlo cking
R Unloc kin gthe driver's door andfuel filler flap #
Toswitc hbetwe en settings: press the
Ü andß buttonss imul taneousl yfor
appr oximat elys ixseco ndsuntilth ei ndicat or
lam pflashes twice.
Op tions ifth eu nloc king function fort he driver's
door andfuel filler flap has been selected:
R Tounlo ckthev ehic lecentr ally:press the
Ü buttontwice.
R Vehicl eswith KEYLESS-GO :if yo ut ouc h
th ei nner surface ofthed oor handle onthe
dr iver's door ,onlyt he driver's door andfuel
fi ller flap areu nlocked. Deactiv
atingtheS ma rtKe yfunctio ns If
yo ud on otuse thev ehicle oraS mar tKey for
an extende dperiodo ftime, youc an reduce the
ener gycon sum ption ofther espectiv eSmar tKey .
To do so, deactiv atet he Smar tKey functions. Openi
ngand closi ng 65

#
Todeac tivate: press theß buttononthe
Smar tKey twi ce inqu icks ucc ession .
The Smar tKey indic ator lam pflashes twice
br ief lyand light supo nce. #
Toactiv ate: press anyb utton ontheS mar t‐
Ke y.
% When thev ehicle isstar tedw itht he Smar t‐
Ke yint he mar keds pace ofthec ent ercon ‐
sole, theS mar tKey functions area utom ati‐
cally activated (/ page173). Re
mo ving /ins ertin gthe eme rgency key #
Toremo ve:pr ess release knob 1.
Em erge ncy key2 ispush edout slightly. #
Pull outemer gency key2 untilit en gage sin
th ei nter mediat eposition . #
Press release knob 1 again and fully
re mo veemer gency key2 . #
Toinser t:press release knob 1. #
Inserte mer gency key2 tothei nter mediat e
position orfull yuntil iteng ages.
% Youc an use thei nter mediat eposition of
emer gency key2 toatt acht he Smar tKey to
ak eyring. Re
plac ingthe Smar tKey batt ery &
DANG ER Serious damag etoh ealt h
caused byswallo wing batteries
Batt eries cont aintoxic and corrosiv es ub‐
st anc es.Swallo wing batteries ma ycause
ser ious damag etoh ealt h.
Ther eisar iskoffata linj ur y. #
Keep batt eries out ofther eac hofchil‐
dr en. #
Ifbatt eries ares wallowe d,seek medical
att ent ion immediat ely. +
ENVIR
ONMEN TALN OTEEn vironme ntal
da ma gecau sed byimproper disposal of
batt eries Bat
teries con tain polluta nts. Itis
illeg alto dispose ofthem withthe household
ru bbish. #
Dispose
ofbatt eries inan
en vironmen tallyr esponsibl emanner .
Ta ke disc hargedb atteries toaq ualif ied
spec ialistworks hop ortoac ollec tion
poin tfor used batteries. Re
quirement s: 66
Openin gand closin g

R
Your equir eaC R20323Vc ellbatt ery.
Mer cedes-Ben zrecom mends that youh ave the
batt eryr eplaced ataq ualif iedspec ialistwork‐
shop. #
Remo vethee mer gency key( /pag e66). #
Press release knob 2 down fullyand slide
co ver1 inthed irect ion ofthea rrow . #
Foldout cover1 inthed irect ion ofthe
ar row and remo ve. #
Remo vebatt eryc om par tmen t3 and take
out thed ischar gedb attery. #
Inser tthe newb atteryi ntob atteryc om par t‐
ment 3.O bservethep ositiv epole mar king
in theb atteryc om par tmen tand ontheb at‐
te ry when doingthis. #
Push inbatt eryc om par tment 3. #
Re-att achc ove r1 and push ituntil it
eng ages. Opening
andclosi ng 67

Pr
oblems withtheS ma rtKe y Pr
oblem
Possible causes/conseq uencesand0050 0050
Solutions
Yo uc an no longerloc ko runloc kthe
ve hicle. Po
ssible causes:
R The Smar tKey batt eryi sw eak ordisc harged.
R Ther eisinter fere nce from apowe rful radio signal source.
R The Smar tKey isfaulty . #
Chec kthe batt eryu sing thei ndicat orlam pand replace ifnec essar y(/pag e66). #
Use thee mer gency keyt olocko runloc k(/pag e66). #
Have theS mar tKey checkeda taq ualifiedspec ialistworks hop.
Yo uh ave lostaS martKey . #
Have theS mar tKey deactiv ated ataq ualif iedspec ialistworks hop. #
Ifnecessar y,ha ve them echanical lockreplaced aswell. 68
Openingand closing