MERCEDES-BENZ GLS 2021 Repair Manual

#
Remo veand stor eaw ay covers 1 ofthe
mounting brac kets intheve hicle. #
Attach theLA TC H-type (ISOFIX )ch ild
re stra int system toboth mounting brac kets
in theve hicle. #
Afterre mo ving thech ild restra int system,
re att achco vers 1 .
Ve hicl eswith are ar ben chseat : #
Mer cedes-Ma ybachve hicl eswith reclin‐
ing rear seats: BeforeaLA TC H-type (ISO‐
FIX) ori-Size child restra int system isins tal‐
led, tiltthere cli ning rear seat backres tbac k
sligh tly. #
Remo veuphol ster ed lining 1. #
Vehicl eswithout reclining rear seats: Fold
uphols tere dlining 1upw ards. #
Turn thesuppor ton thebac kof uphols tere d
linin g1 by90°.
Up hols tere dlining 1will remain folded
upw ards. #
Attach theLA TC H-type (ISOFIX )ch ild
re stra int system toboth mounting brac kets
2 intheve hicle. #
Mer cedes-Ma ybachve hicl eswith reclin‐
ing rear seats: Retur nth ere cli ning rear seat
bac kres tto an upr ight posit ion.
The recli ning rear seat backres tmus tbe in
con tact with thech ild restra int system. Ve
hicl eswith ath ird ro w of sea ts: #
Attach theLA TC H-type (ISOFIX )ch ild
re stra int system toboth LATC H-type (ISOFIX )
mou nting brac kets 1. Occu
pant safety 59

Secur
ingaTo pTe ther &
WARNIN GRisk ofinju ryor deat hif th e
re ar seat backres ts areno tloc kedaf te r
ins talling TopTe ther belts
The rear seat backres ts ma yfo ld forw ards
when drivin g.
In this case, child restra int systems mayno
long erper form their intended protect ive
func tion.Ad dition alinj uries mayalso be
caused. #
Alw aysloc kre ar seat backres ts afte r
ins talling TopTe ther belts. #
Payatt ention totheloc kve rificati on
indi cator. If
th eseat backres tis no teng aged and lockedin
place, this will besho wnonthemultifunc tion
displa yon theins trument cluster(fold rear seat
bac kelec tricall y)or there dloc kve rificati onindi ‐
cat orwillbe visible (fold rear seat backmec hani‐
call y).
¯ Ifth ech ild restra int system iseq uipped
wit haTo pTe ther belt : The
risk ofinjur ycan bereduced byaTo p
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.
The TopTe ther anc horages forth esecon drow of
seats arelocat edon thebac kof theseat back‐
re st.Fo rth eth ird row ofseats, usetheTo p
Te ther anc horageon thebac kof theseat back‐
re st. Second
rowofseats 60
Occupant safety

#
Ifnecessar y,slide head restra int 1 upw ards
(/ page10 5). #
Installth eLA TC H-type (ISOFIX )ch ild restra int
sy stem withTo pTe ther.Com plywit hth e
ch ild restra int system manuf acturer'sinstal‐
lation instruct ions . #
Guide TopTe ther belt 5under head
re stra int 1 between thetw ohead restra int
bar s. #
Ifcar gocom partment cover3 isins talled,
guide TopTe ther belt 5down wards
be tween cargocom partmen tco ver3 and
seat backres t2. #
Hook TopTe ther hook 6ofTopTe ther belt
5 intoTo pTe ther anc horage4 without
twis ting. #
Tensi on TopTe ther belt 5.Com plywit hth e
ch ild restra int system manuf acturer'sinstal‐
lation instruct ions . #
Ifnec essar y,slide head restra int 1 down‐
wa rds(/ page10 5). Makesur eth at youdo
no tint erfere wit hth ecor rect routin gof Top
Te ther belt 5. 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. #
Mak esur eth at there ar ben chseat, the
re ar seat andtheseat backres tar e
eng aged bef oreeve rytrip . If
th eseat backres tis no teng aged and lockedin
place, this will besho wnonthemultifunc tion
displa yon theins trument cluster(fold rear seat
bac kelec tricall y)or there dloc kve rificati onindi ‐
cat orwillbe visible (fold rear seat backmec hani‐
call y).
Wh eninstallin gabelt -secu redch ild
re stra int system, obser vethefo llo wing:
0073 Alw
ayscom plywit hth emanuf acturer's
ins tallation andoper atingins truct ions for
th ech ild restra int system used. Occ
upant safety 61

0073
When
usingacat ego ry0/0+ babycar
seat andacat egor yIre ar wa rd-faci ng
ch ild restra int system onare ar seat :
adju stthefront seat sothat theseat does
no tto uc hth ech ild restra int system.
0073 When
usingacat egor yIfo rw ard-f acin g
ch ild restra int system: remo vethehead
re stra int from there spectiv eseat, ifpossi‐
ble.
Af terth ech ild restra int system has been
re mo ved, replace thehead restra int immed i‐
at elyand adjus tall head restra int scor ‐
re ctly .
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 Fo
rcer tain child restra int systems inwe ight
cat egor yII or III,th er ema ybe restrictions
on themaximum sizesetting, e.g. due to
possible contact 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. 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 sacc ording ly.
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.
The seat beltson thefo 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
(/ page56). #
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.
Alw aysensur eth at thefront passeng erair‐
bag isdisabled. ThePASSENGER AIRBAG
OFF indicat orlam pmus tbe lit. 62
Occupant safety

NEVER
useare ar wa rd-faci ng child restra int
sy stem onaseat withan ENABL EDFRONT
AIRB AG;DE ATHor SERIOU SINJU RYtothe
CH ILD can occur . Obser
vethespecif icins truction sfo rre ar wa rd-
fa cing andforw ard-f acin gch ild restra int systems
(/ page63).
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
vethech ild restra int system manuf ac‐
tur er's installation andopera tingins truc‐
tion s.
0073 When
usingafo rw ard-f acin gch ild restra int
sy stem incat egor yI: re mo vethehead
re stra int from there spectiv eseat, ifpossi‐
ble.
Af terth ech ild restra int system has been
re mo ved, replace thehead restra int immed i‐
at elyand adjus tall head restra int scor ‐
re ctl 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 Fo
rcer tain child restra int systems inwe ight
cat egor yII or III,th er ema ybe restrictions
on themaximum sizesetting, e.g. due to
possible contact 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.
0073 The
child restra int system mus tno tbe put
under stra in by thehead restra int .Ad jus t
th ehead restra int sacc ording ly.
0073 Ne
verpla ceobjects (e.g.cushi ons)under or
behi ndthech ild restra int system.
The seat beltonthefront passeng erside is
eq uipped withach ild seat safetyfe atur e.
When enabled,thech ild seat safetyfe atur e
ens ures that theseat beltdoes notslac kenonce
th ech ild seat issecur ed(/ page56). #
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 andthere ar edg eof the
seat cushion isin thelowe stposition . Occ
upant safety 63

#
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. Child
safetyloc ks Ac
tiv atin gor deac tivatin gthe child safety
loc kfo rthe rear door s &
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 Getout and 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 eth etransmission position.
R Startth eve hicle. #
Neverlea vechildr enunat tende din the
ve hicle. #
When leaving theve hicle, alwaysta ke
th eSmar tKey wit hyo uand lockth e
ve hicle. #
Keep theSmar tKey out ofreac hof chil‐
dr en. &
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. #
Neverlea veanyone –pa rticular lych il‐
dr en –unat tende din theve hicle. #
Neverlea veanim alsintheve hicle unat‐
te nde d. 64
Occupant safety

&
WARNIN GRisk ofacci dent andinjury
due tochildr enleftunat tende din the
ve hicle
If ch ildr enaretra veling intheve hicle, they
cou ld,in pa rticular :
R Open doors,ther eb yendang ering other
per sons orroad user s
R Getout and bestru ck byoncom ingtraf fic
R Oper ateve hicle equipment andbecome
tr apped, forex am ple #
Alw aysactiv ateth ech ild safetyloc ks
ins talled ifch ildr enaretra veling inthe
ve hicle. #
Neverlea vechildr enunat tende din the
ve hicle. #
When leaving theve hicle, alwaysta ke
th eSmar tKey wit hyo uand lockth e
ve hicle. Ther
ear ech ild safetyloc ksforth ere ar door s
and there ar side windows. The
child safetyloc kon there ar door ssec ures
eac hdoor separat ely. The door scan nolong er
be opened from theinside. #
Press theleve rin dir ection 1(activ ate) or
2 (dea ctivate). #
Mak esur eth at thech ild safetyloc ksare
wo rking proper ly. Ac
tiv atin gor deac tivatin gthe child safety
loc kfo rthe rear side windo ws #
Toactiv ate/ deacti vate:pr ess button 2.
The rear side windowcan beope ned or
clos edinthefo llo wing cases :
R indic ator lam p1 islit:via theswitc hon
th edr iver's door Occ
upant safety 65

R
Indicat orlam p1 isoff:via theswitc hon
th ecor responding rear door ordriver' s
door . 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
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. #
Neverlea veanim alsintheve hicle unat‐
te nde d. #
Alw ayscor rectly secu reanim alswhile
dr ivin g,forex am ple usin gasuit able
anim alcar rier . 66
Occupant safety

Smar
tKey Ov
ervie wof Smar tKey functio ns &
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 Getout and 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 eth etransmission position.
R Startth eve hicle. #
Neverlea vechildr enunat tende din the
ve hicle. #
When leaving theve hicle, alwaysta ke
th eSmar tKey wit hyo uand lockth e
ve hicle. #
Keep theSmar tKey out ofreac hof chil‐
dr en. *
NO
TEDama getotheSmar tKey cau sed
by magne ticfields #
Keep theSmar tKey away from stro ng
ma gne ticfields. 1
Locks
2 Indicat orlam p 3
Unloc ks
4 Opens/closes theta ilg ate
5 Panic alar m
% Ifind icatorlam p2 does notlig ht up afte r
pr essing theÜ orß button,thebat‐
te ry isdisc harged.
Re placing theSmar tKey batt ery(/ page69).
The Smar tKey loc ksand unlocksth efo llo wing
com pone nts:
R thedoor s
R thefuel filler flap
R theta ilg ate
If th eve hicle isno topened within appr oximat ely
40 seco ndsafte runloc king,itloc ksagain. Anti-
th eftpr otect ion isarmed again.
Do notke ep theSmar tKey toge ther wit helec‐
tr onic devices orme talobje cts. This canaffect
th eSmar tKey 's functionality .
Do notke ep theSmar tKey inthete mp eratur e-
con trolled cupholder .Ot her wise, theSmar tKey
will notbe reliably detected. Ope
ning andclosing 67

Ac
tiv atin g/deac tivatin gthe acoustic lock ing
ve rificat ion signa l Mult
imed iasystem:
4 © 5
Set ting s5
Vehicle #
Activateor deacti vate Acou sticLock . Ac
tiv atin g/deac tivatin gthe pani calar m Re
quirement s:
R The ignit ionisswitc hedoff. #
Toactiv ate: press butt on1 forapp rox‐
ima tely one second.
A visual andaudibl ealar mistrigg ered. #
Todeac tivate: briefly pr ess button1 again.
or #
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 #
Toswitc hbe tw een settings: press the
Ü andß buttonssimul taneousl yfo r
appr oximat elysix seco ndsuntilth eindicat or
lam pflashes twice.
Op tions ifth eunloc kingfunction forth edr iver's
door andfuel filler flap has been selected:
R Tounlo cktheve hicl ece ntr ally:press the
Ü buttontwice.
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
atingtheSmar tKey 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 tKey .
To do so, deactiv ateth eSmar tKey functions. #
Todeac tivate: press theß buttononthe
Smar tKey twi ce inqu ick succ ession .
The Smar tKey indic ator lam pflashes twice
br ief lyand light sup once. #
Toactiv ate: press anybutt onontheSmar t‐
Ke y.
% When theve hicle isstar tedwit hth eSmar t‐
Ke yin themar kedspace ofthecent ercon ‐
sole, theSmar tKey functions areau tomati‐
cally activated (/ page16 9). 68
Opening an dclos ing