light MERCEDES-BENZ GLS 2021 Repair Manual

#
Inser tth efuel filler cap from aboveinto
br ac ket2. #
Comp lete ly inse rtthepum pnoz zleintoth e
ta nk filler neck,hook inplace andrefuel . #
Onlyfill th efuel tank unti lth epum pnoz zle
switc hesoff. #
Replace thecap onthefiller neckand turn
cloc kwise untilit eng ages audibl y. #
Close fuelfiller flap 1.
% Close thefuel filler flap bef oreloc kin gth e
ve hicle. Pa
rking Pa
rking theve hicl e &
WARNIN GRisk ofacci dent andinjury
cau sed byan insufficie ntlysecu redve hi‐
cle rolling away
If th eve hicle isno tsecur elyparkedsuf fi‐
cie ntly ,it can rollaw ay inan unc ontrolled
wa yev en ataslight downhill gradient. #
Onuphill ordownhill gradients, turnth e
fr ont whee lsso that theve hicle rolls
to wa rdsth ecurb ifit star ts mo ving. #
App lythepar king brak e. #
Switc hth etra nsmiss iontoposition 005D. &
WARNIN GRisk offire cau sed byhot
ex haus tsy stem parts
Flammable materials suchas lea ves, grass or
twigs mayignit e. #
Park theve hicle sothat no flammab le
mat erial can com eint ocon tact with hot
ve hicle component s. #
Inpar ticular ,do notpar kon drygr ass‐
land orhar vested grain fields. &
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. 19
4
Driving and parking

#
Alw aysmak esur eth at nobody iswit hin
th era ng eof mo vement ofthedoor . Onl
yoper ateth efo llo wing doorsusing the
ga rage door opener :
R Door swit hasaf etyst op and reve rsing fea‐
tur e
R Doorswhic hcon form tothecur rent U.S.
sa fety standar ds
Re quirement s:
R The vehicle hasbeen parkedoutside the
ga rage oroutside thera ng eof mo vement of
th edoor .
R The engine isswitc hedoff.
R The ignition isswitc hedon.
% The garage door opener function isalw ays
av ailable whentheignition isswitc hedon. #
Chec kif th etra nsmit terfr eq uency ofthe
re mo tecontr olha sth efreq uency rang eof
280 to868 MHz.
Ra dio equipment approval num ber:
R NZLM UAHL5 (USA)
R 4112 A-MU AHL5 (Canada ) #
Press and hold button1, 2or3 that you
wish toprog ram.
Indicat orlam p4 flashes yello w.
% Itcan take up to20 seconds beforeth eindi‐
cat orlam pflashes yello w. #
Release thepr ev iousl ypr essed button.
Ind icat orlam p4 con tinues toflash yello w. #
Point remo tecontr ol5 from adi st anc eof
0. 4in (1 cm )to 3in (8 cm) towa rdsbutt on
1, 2or3. #
Press and hold button6 ofremo tecontr ol
5 unti lone ofthefo llo wing signalsappear s:
R Indicat orlam p4 light sup green contin‐
uousl y.Progr amming iscom plete.
R Indicat orlam p4 flashes green .Pr o‐
gr ammi ngwassuccessful. Addition ally,
sync hronization ofthero lling code with
th edoor system mus talso becar ried out. #
Ifindicat orlam p4 does notlight uporflash
gr ee n: repeat thepr ocedur e. #
Release allofthebutt ons. 19
6
Driving and parking

%
The remo tecontr olforth edoor drive is no t
included inthescope ofdeliv eryof the
ga rage door opener .
Sync hronizing thero lling code
Re quirement s:
R The door system uses aro lling code.
R The vehicle mustbe within rang eof the
ga rage door ordoor drive.
R The vehicle aswellas per son sand obje cts
ar elocat edouts idethera ng eof mo vement
of thedoor . #
Press thepr ogr amming buttononthedoor
dr ive unit.
Init iateth ene xt step within appr oximat ely
30 seco nds. #
Press prev iousl ypr og rammed button1, 2
or 3 repeat edlyuntil thedoor closes.
When thedoor closes, progr amming iscom‐
ple ted.
% Please alsoread theoper ating instruction s
fo rth edoor drive. Tr
oublesh ooting when prog rammin gthe
re mo tecont rol #
Chec kif th etra nsmit terfr eq uency ofremo te
contr ol5 issu ppo rted. #
Replace thebatt eries inremo tecontr ol5. #
Holdre mo tecontr ol5 atvarious angles
fr om adis tance of0.4 in(1 cm) to3in
(8 cm) front oftheinside rear vie wmir ror.
Yo usho uld test eve ryposition forat lea st
25 seconds beforetrying ano ther position . #
Hold remo tecontr ol5 atthesame angles
at various distances infront oftheinside
re ar vie wmir ror.Yo usho uld test eve ryposi‐
tion forat lea st25 seconds beforetrying
ano ther position . #
Notethat som ere mo tecontr olstransm it
only fora limi tedper iod, press butt on6 on
re mo tecontr ol5 again bef oretransm ission
ends . #
Align theant enn aline ofthedoor opener unit
wit hth ere mo tecontr ol. %
Supportand additiona linf ormati ononpro‐
gr amm ing:
R Ontheto llfree Hom eLink®
Ho tlin eon
1- 800 -355- 3515
R OntheInt erne tat htt ps:/ /
www .homelin k.com/me rcedes
Opening orclosing thega rage doo r
Re quirement s:
R The corresponding buttonisprogr ammed to
oper ateth edoor . #
Press and hold buttons 1,2or3 until
th edoor opens orcloses. #
Ifindicat orlam p4 flashes yello wafte r
appr oximat ely20 seco nds:pr ess and hold
th epr ev iousl ypr essed buttonagain untilth e
door opens orcloses.
Clear ingthega rage doo rope nermemo ry #
Press and hold buttons 1and 3.
Indicat orlam p4 lights upyello w. #
Ifindicat orlam p4 flashes gree n: release
butt ons 1and 3.
The entire memo ryhas been deleted. Dr
iving andparking 19
7

Mer
cede s-AMG vehicl es:obse rveth eno tesin
th eSupplement .Yo uco uld other wise failto rec‐
ogni zedangers.
The Electr onicStabilit yPr ogram (ESP®
)can
mon itor and improve driving stabilit yand trac‐
tio nin thefo llo wing situat ionswithin physical
limit s:
R When pulling away on awe tor slip pe ry road.
R When brakin g.
If th eve hicle deviat esfrom thedir ect ion desir ed
by thedr iver ,ES P®
can stabiliz eth eve hicle by
int erve ning inthefo llo wing ways:
R One ormor ewheels arebr ak ed.
R The engine outputisadap tedaccor dingto
th esituation .
ES P®
is deactiv ated ifth e00BB ESP®
OFF warn‐
ing lam plight sup con tinuousl yin theins trument
clus ter:
R Driving stabilit ywill nolongerbe improve d.
R The drive wheels couldspin.
R ETS/4 ETStra ction control isstill act ive. %
When ESP®
is deact ivat ed, youar est ill assis‐
te dby ESP ®
wh en braki ng.
If th e00E5 ESP®
wa rning lam pflashes inthe
ins trumen tclus ter,one orseveralve hicle wheels
has reac hed itsgrip limit :
R Adaptyo ur drivin gst yle to suit thecur rent
ro ad and weather condition s.
R Donotdeac tivateES P®
.
R Onlydepr esstheaccelera torpeda las faras
is necessar ywhen pulling away.
It can beadv antageous todeactiv ateES P®
in the
fo llo wing situat ionstoimprove tracti on:
R Whenusing snowch ains .
R Indeep snow .
R Onsand orgrave l.
% Spin ningth ewheels results inacutting
action, whichenhances traction.
If th e00E5 ESP®
wa rning lam plight sup con tinu‐
ousl y,ESP ®
is no tav ailable duetoamalf unction.
Obse rveth efo llo wing informatio n:
R Indicat orand warning lam ps(/ page460 ) R
Disp lay mess ages (/ page408 )
ET S/4ET S(Electr onicTractio nSy stem)
ET S/ 4ETS tracti oncontr olispa rtof ESP ®
and
mak esitpossible topull away and accelerat eon
a slippe ryroad.
If yo usele cttheF orG drive pr og ram, a
specia lET Ssy stem specif icallysuit edtooff-r oad
te rrain isaut omat icallyact ivat ed.
ET S/ 4ETS can improve theve hicle's traction by
int erve ning inthefo llo wing ways:
R The drive wheels arebr ak ed individually if
th ey spin.
R Mor edr ive to rq ue istrans ferred tothewheel
or wheels withtra ction.
ESP ®
modes
Depen dingontheselect eddrive pr ogr am, the
appr opriateES P®
mode willbeact ivat ed aut o‐
mat icall y.ESP ®
ad apts to differe nt we ather and
ro ad con dition sas wellas thedr iver's prefer red
dr iving style. Youcan selectthedr ive pr og rams
usi ng theDY NA MIC SELE CTswitc h
(/ page18 4). 20
4
Driving and parking

ESP
®
Comf ort
R active in drive pr ograms A,;and
N
R balanc ebe tween tractio nand stabilit y
R recomme ndedforall road sur face condi tions
R suitab leforbo th dryand difficul tro ad con di‐
tio ns,suc has snow orice, orwhen thero ad
is we tfr om rain
ESP ®
Spor t
R active in drive pr og ram C
R continues toofferst abilit ybut withaspor ty
se tup
R allowsthespor tydriver amor eactiv edr iving
st yle
R onlysuit able forgood road con dition s,adr y
ro ad sur face and acle arstre tchof road
ESP ®
Spo rt+
R active in drive pr ogram B
R emphasi zesth eve hicle's ownove rste er ing
and under steer ing charact eristic sfo ra mor e
activ edr iving style R
onlysuit able forgood road con dition s,adr y
ro ad sur face and acle arstre tchof road
ESP ®
of f-ro ad and ESP®
of f-r oad +
R activ ein drive pr ogr ams F andG
R interve nes late rif th er eis ove rste er ing or
under steer ing, thus improv ing tract ion
R ESP®
of f-ro ad (F): suitable foreasi ly
nego tiable of f-r oa dte rrain suchas dirt
tr ac ks,gr ave lor sandy surfaces
R ESP ®
of f-r oa d+ (G): suitab leforro ugh
te rrain suchas steep and/or unevente rrain
or fordr iving onrock yte rrain Ac
tiv atin g/deac tivatin gES P®
(E lectr onicSta‐
bil ity Prog ram) (veh icle swi thout Off-road
pac kage) Multimedia
system:
4 © 5
Set ting s5
Quick Access
% ESP®
can onlybe activ ated/deact ivat ed
using quick acc ess when atleas tone other
funct ionisavailable inqu ick acc ess. ESP® can
other wise befound intheAssist ance
menu.
Mer cedes‑AMG vehicl es:obse rveth eno tesin
th eSupplement .Yo uco uld other wise failto rec‐
ogni zedangers. #
Sele ctESP . #
Sele ctOn or00BB Off.
ESP ®
is dea ctivated ifth e00BB ESP®
OFF warn‐
ing lam plight sup con tinuousl yin theins trument
clus ter.
Obser vetheinf ormation onwarning lam psand
displa ymess ages whic hma ybe sho wninthe
ins trumen tclus ter. Ac
tiv atin g/deac tivatin gES P®
(E lectr onicSta‐
bil ity Prog ram) (veh icle swi th Off-road pack‐
ag eor E-Ac tiv eBody Contr ol) Mer
cedes -AMG vehicl es:obse rveth eno tesin
th eSupplement .Yo uco uld other wise failto rec‐
ogni zedangers. Dr
iving and parking 205

#
Pull rock er switc h1.
ES P®
is deactiv ated ifth e00BB ESP®
OFF warn‐
ing lam plight sup con tinuousl yin theins trument
clus ter.
Obser vetheinf ormation onwarning lam psand
displa ymess ages whic hma ybe sho wninthe
ins trumen tclus ter. Fu
nction ofESP ®
Cr osswind Assist ES
P®
Cr osswind Assistde tects sudde ngu stsof
side wind andhelps thedr iver tokeep theve hi‐
cle inthelane:
R ESP®
Cr osswind Assistis activ eat vehicle
speeds between appr ox.47 mp h(7 5 km/h)
and 125mp h(200 km/h) whendriving
st ra ight ahead orcor ner ing slight ly.
R The vehicle isstabiliz edbymeans ofindivi d‐
ua lbr ak eapp lication onone side. Fu
nction ofESP ®
trailer stabil izatio n &
WARNIN GRisk ofacci dent inpoo rro ad
and weather condition s
In poor road and weather condition s,the
tr ai le rst abiliz ationcan notpr ev ent lurching of
th eve hicle/tr ailercombination. Trailer swit h
a high centerof grav ity ma ytip ove rbef ore
ESP ®
de tects this. #
Alw aysadap tyo ur drivin gst yle to suit
th ecur rent road and weather condi‐
tio ns. When
drivin gwit hatrailer ,ES P®
can stabiliz e
yo ur vehicle ifth etrailer begins tosw erve from
side toside:
R ESP ®
traile rst abiliz ationis act ive abo ve
speeds of40 mph(65 km/h).
R Slight swerving isreduced bymeans ofata r‐
ge ted, individual brak eapplication onone
side.
R Intheeve ntofsevere sw erving, theengine
output isalso reduced andallwheels are
br ak ed.
ES P®
tra iler stabiliz ationma ybe impair edor
ma yno tfun ction if:
R The trailer isno tcon nectedcor rectl yor is
no tde tected prope rly by theve hicle. 206
Driving andparking

Fu
nction ofEBD Elect
ronic Brea kfor ce Dis trib uti on (EBD) isch ar‐
act erize dby thefo llo wing:
R Mon itor ing and regulating thebr ak epr essur e
on there ar wheels .
R Improv ed driving stabilit ywhen brakin g,
espe ciallyon ben ds. Fu
nction ofSTEER CONT ROL ST
EER CONTR OLhelpsyo uby trans mitting a
no tice ablesteer ing forc eto thesteer ing wheel in
th edir ect ion requ ired forve hicle stabiliz ation.
This steer ing recomme ndation isgiv en particu‐
lar lyin thefo llo wing situat ions:
R Both right wheels orboth leftwheels areon
a we tor slip pe ry road sur face whe nyo u
br ak e.
R The vehicle star ts to skid. Sy
stem limit s
ST EER CONTR OLmaybe impa ired orma yno t
fu nctio nin thefo llo wing situat ions:
R ESP®
is deact ivat ed.
R ESP®
is malfun ctionin g.
R The steer ing ismalfunct ioning.
If ES P®
is malfunct ioning,youwill beassis ted
fur ther by theelectr icpo we rst eer ing. Fu
nction ofActiv eBr ak eAs sist Ac
tiveBr ak eAssi stconsi stsof thefo llo wing
func tions:
R Distance warning func tion
R Autonomo usbraki ng func tion
R Situ ation-d epend ent braki ng assist anc e
R Vehicl eswith Drivin gAss istanc ePa ck‐
ag e:Evasi ve Steer ing Assis tand corner ing
func tion
Ac tiveBr ak eAssi stcan helpyo uto minimize the
ri sk ofacollision withve hicles, cyclis tsor pedes
trians, orreduce theef fects ofsuch acol li‐
sion .
If Ac tiveBr ak eAssi sthas detected arisk ofcolli‐
sion, awa rning tone sou nds and theL dis‐
ta nce warning lam plight sup intheins trument
clus ter.
Ve hicl eswith PRE-S AFE®
:depe nding onthe
cou ntry,an addit ionalhap ticwarning occursin
th efo rm ofslight, repeat edtensi oni ng ofthe
seat belt.
If yo udo notre act tothewa rning, autono mous
br akin gcan beinit iated incritic alsituat ions.
In espec iallycritic alsituat ions,Ac tiveBr ak e
Assi stcan initia te aut onomo usbrakin gdir ect ly.
In this case, thewa rning lam pand warning tone
occu rsi mu ltane ously with thebr aking applica‐
tion .
If yo uappl yth ebr ak eyo urself inacr itical situa‐
tio nor appl yth ebr ak edur ing autonomous brak‐
ing, situation -dependen tbr aking assistance
occu rs.The brak epr ess ureincr eases uptomax‐
imum full-sto pbr aking ifnec essar y. Dr
iving and parking 20
7

Obser
vetheno teson driving systems andyour
re sponsibili ty;yo uma yot her wise failto recog‐
nize dangers(/ page 201). If
au tonomo usbraki ng orsitua tion-de pende nt
br aki ng assist anc ehas occurred, displa y1
appear sin themultifunc tiondispla yand then
aut omaticall ygoes outafte ra shor ttime.
If th eaut onomous braking function orthesitua‐
tion -dependen tbr aking assistance istrig ge red,
additional preve ntiv emea suresfo roccupa nt
pr otect ion (PRE-S AFE®
)ma yalso beinitiat ed. &
WARNIN GRisk ofan acci dent caused by
limit eddetection perform anc eof Active
Br ak eAssi st
Ac tiveBr ak eAssi stcanno tal wa ys cle arly
ident ifyobje ctsand complextraf fic situ a‐
tions . #
Alw ayspa ycar eful attention tothetra f‐
fi c situ ation; donotre ly on ActiveBr ak e
Assi stalon e.Ac tiveBr ak eAssi stisonl y
an aid. Thedriver isresponsible for
maint ainingasuf ficie ntly safedist anc e
to theve hicle infront, vehicle speed
and forbr aking ingood time. #
Beprepa redto brak eor sw erve ifnec ‐
essar y. Als
oob ser vethesy stem limits ofActiveBr ak e
Assi st. The
indiv idua lsub func tions areav ailab lein
va rious speed rang es:
The distance warning func tion canissue awa rn‐
ing inthefo llo wing situat ions:
R From appr oximat ely4 mp h(7 km/h), ifyo ur
ve hicle iscritically closetoave hicle, cyclis t
or pedes trian, youwill hear anintermit tent
wa rning tone and theL distance warning
lam plight sup intheins trument cluster.
Ve hicl eswith PRE-S AFE®
:depe nding on
th ecount ry,an addition alhap ticwarning
occ ursin thefo rm ofslight, repeat edten‐
si oni ng oftheseat belt.
Br ak eimmediat elyortake evasiv eact ion,pr ov i‐
ded itis saf eto do soand thetraf fic situ ation
al lo ws this. 208
Drivin gand parking

Yo
ucan preve nttheassis tance atanytime by
act ivel yst eer ing.
Cor nering function (onlyve hicl eswith Driv‐
ing Assistanc ePa ckag e)
If adang erofcoll ision from anoncoming vehicle
is de tected whe ntur ning across anoncomi ng
la ne, autonomo usbraki ng can beinitia tedat
speeds below9mp h(1 5 km/h) beforeyo uha ve
lef tth elane inwhic hyo uar edr ivin g. &
WARNIN GRisk ofacci dent despite Eva‐
si ve Steer ing Assis t
Ev asiv eSt eer ing Assis tcann otalw aysre cog‐
nize objectsorcom plex traf fic situ ations
cle arly.
Mor eover,th esteer ing suppor tpr ov ided by
Ev asive St eer ing Assis tis no tsuf ficie ntto
avo idacollis ion. #
Alw ayspa ycar eful attention tothetra f‐
fi c situ ation; donotre ly on Evasiv e
St eer ing Assis talone. #
Beprepar edtobrak eor sw erve ifnec ‐
essar y. #
End thesuppor tby act ivel yst eer ing in
non -critical situation s. #
Drive at an appr opriatespeed ifth er e
ar epedes trians close tothepat hof
yo ur vehicle. Sy
stem limit s
Fu llsy stem perform anc eis no tav ailable fora
fe w sec ond saf te rswitc hingontheignition or
af te rdr iving off.
The system maybe impair edorma yno tfunc tion
in thefo llo wing situat ions:
R Insno w,rain, fog, hea vyspr ay,if th er eis
gl ar e, indir ect sunlight oringrea tly varying
ambien tlight .
R Ifth esensor sar edir ty,fo gg ed up, damag ed
or covered.
R Ifth esensor sar eim pair eddue tointerfer‐
ence from other radar sour ces, e.g.stro ng
ra dar reflect ions inpar king garage s.
R Ifaloss oftirepr essur eor afa ulty tirehas
been detected and displ aye d.
R IfDS Ris activ e. R
Incom plextra ffic situat ionswher eobje cts
can notalw aysbe clear lyident ified.
R Ifpedes trians orvehicles movequickl yint o
th esensor detection rang e.
R Ifpe destrians arehidde nby other object s.
R Ifth etypical outline ofapedes trian cann ot
be distinguished from thebac kground .
R Ifapedes trian isno tde tected assuch ,e.g.
due tospecial clothing orother object s.
R Onbends withatight radius.
% The ActiveBr ak eAssi stsensor sadjus taut o‐
matically whileacer tain dis tance isbe ing
dr iven afte rth eve hicle hasbeen delivered.
Ac tiveBr ak eAssi stisuna vailable oronl y
par tiall yav ailable during this teac h-in per iod. Se
tting Activ eBr ak eAs sist Re
quirement s:
R The ignit ionisswitc hedon. Dr
iving andparking 21
1

Multimedia
system:
4 © 5
Set ting s5
Assist ance
5 Act ive Brak eAssist #
Select thedesir edsetting.
The setting isretained when theengine is
ne xt star ted.
Deactiv atingActiv eBr ak eAs sist
% Itis recomme ndedthat youalw ayslea ve
Ac tiveBr ak eAssi stact ivat ed. #
Select Off.
The distance warning func tion,th eaut ono‐
mous braking function andtheEv asiv eSt eer‐
ing Assis tar edeactiv ated.
When theve hicle isne xt star ted, themiddle
se tting isaut omaticall yselect ed.
% IfAc tiveBr ak eAssi stisdeact ivat ed, the
00D4 symbol appearsinthest atus barofthe
multifu nctiondisplay. Speed
controlcruise contr ol Fu
nction ofcruise contr ol
Cr uise controlre gulat esthespeed totheva lue
selec tedby thedr iver .
If yo uacc elerat eto ove rtak e, forex am ple, the
st or ed speed isno tdele ted. Ifyo ure mo veyour
fo ot from theacceler ator pedal afte rove rtakin g,
cr uise control will resume speed regulation back
to thestor ed speed.
Cr uise controlis oper ated using thecor respond‐
ing steer ing wheel buttons. Youcan stor ean y
speed above15 mp h(2 0km/h) uptothemaxi‐
mum design speed.
Obser vetheno teson driving systems andyour
re sponsibili ty;yo uma yot her wise failto recog‐
nize dangers(/ page 201).
Mer cedes‑A MGvehicl es:Cruis econtr olis
av ailable uptoamax imum speedof 155mp h
(250 km/h).
Displa yson themu ltifunct iondisp lay
R h (gra y): cruise contro lis selec tedbut
no tye tacti vated.
R h (green): cruise control isactiv e. A
stor ed speed appear salong withth eh dis‐
pla y.
% The segment sbe tween thestor ed speed and
th eend ofthesegment displaylight upin
th espeedome ter.
Sy stem limit s
Cr uise control ma ybe unable tomaint ainthe
st or ed speed onuphill gradients. Thestor ed
speed isresumed whenthegr adient evensout.
Ch ang eint oalowe rge ar ingood timeon long
and steep downhill gradients. Take par ticular
no te ofthis when drivin galaden vehicle. By
doing so,youwill mak euse ofthebr aking effect
of theengine. Thisrelie vesth eload onthebr ak e
sy stem and preve nts thebr ak es from overheat‐
ing and wearing tooqu ickl y.
Do notus ecr uise contr olinthefo llo wing situa‐
tion s:
R Intraf fic situ ations whichrequ ire freq uent
ch ang esofspee d,e.g .in hea vytraf fic, on
wi nding roads.
R Onslippe ryroads. Accel erati ng can cause
th edr ive wheels tolose tract ion and the
ve hicle could then skid. 21
2
Driving and parking