2021 MERCEDES-BENZ GLS ECO mode

yo
ur vehicle atthetime ofthis Opera tor's Man‐
ua lgoing topress. Countr y-specif icdif fere nces
ar epo ssi ble. No tethat your vehicle mayno tbe
eq uipped withall featur esdesc ribed. Thisisalso
th ecase forsy stems andfunc tionsre leva nt to
saf ety. Ther efor e, theeq uipment onyour vehicle
ma ydif ferfr om that inthedescr iption sand illus‐
tra tion s.
The original purchase agreeme ntforyo ur vehicle
cont ains alis tof all ofthesy stems inyour vehi‐
cle.
Should youha ve anyqu estion scon cerning
eq uipment andoper ation, please consult an
aut hor ized Mercedes- BenzCenter.
The Oper ator's Manual andMaint enanc eBook let
ar eim por tant docum ents andshould be kept in
th eve hicle. Ser
vice andvehicl eoper ation Ve
hicl eoper ation outside theUS Aor Cana da When
youar eabr oad withyo ur vehicle, observe
th efo llo wing points:
R Service point sor replacemen tpar tsma yno t
be available immediat ely.
R Unleaded fuelmayno tbe available forve hi‐
cles withacat alytic converter .Leaded fuel
ma ycause damag eto thecat alytic converter .
R The fuel mayha ve an extreme lylow oct ane
numb er.Un suit able fuelcancause engine
damag e.
Some Mercedes-Benz modelsareav ailable in
Eur ope thro ugh ourEuropean DeliveryPr og ram.
Fo rmor einf ormation, pleaseconsult anauthor‐
ized Mercedes‑B enzservice center,or write to
one ofthefo llo wing address:
In theUS A:
Mer cede s-Benz USA,LLC
Eur opea nDeliv eryDepar tment
One Mercedes-Benz Drive
Sandy Springs, GA30328 In
Canada:
Mer cedes-Benz Canada,Inc.
Eur opea nDeliv eryDepar tment
98 Vande rhoof Avenue
To ronto, Ont ario M4G 4C9 Mai
nten anc e Yo
ur cus tomer advisorconf irms theser vice in
th eser vice repor t. Ro
adside Assistan ce The
Mercedes -Benz Roadside Assis tance Pro‐
gr am offers tech nica lhel pin thecase ofa
br eakdo wn.Your calls totheto ll-f reeRo adside
As sis tance Hotline areans weredby our agents
24 hour sa da y,365 days aye ar.
1- 80 0-FO R-MER Cedes (1-800-367-63 72)(US A)
1-8 00-387-0 100(Canada)
Yo ucan find further information inthe
Mer cedes-Ben zRo adside Assis tance Progr am
br oc hu re (US A)orthe"R oadside Assistance" 24
Generalno tes

#
Neverto uc hdamag edcomp onent parts
of high-v oltagecom ponent s. #
Neverto uc hco mp onent partsof high-
vo ltag ecom pone ntsaf te ran accide nt. Ve
hicles witha48 Von-boar delectr icalsystem
con tain high voltag ecom pone nts. These compo‐
nen tsaremar kedwit hahigh voltag elabel: All
workon high voltag ecom pone ntsmus tbe
car ried out ataqu alif ied spec ialistwo rkshop. Dec
laration ofconf ormity forwi reless vehi‐
cle comp onent s
US A:"Radio based devic es ofthis vehicle com‐
ply withPa rt15 oftheFCC Rules. Opera tionis
subje ctto thefo llo wing twocon dition s:1) These
de vice sma yno tcause harmful interfere nce, and
2) The sedevice smu stacc eptan yint erfere nce
re cei ved, includin gint erfere nce that ma ycaus e
unde sired oper ation.Chan gesor modif ications
no tex pressl yappr ovedby thepar tyresponsible
fo rcom pliance could void theuser's author ityto
oper ateth eeq uipment. "
Canada :"This vehicle contains license-e xemp t
tr ans mitter( s)/r ece iver( s)that com plywit hInno ‐
va tio n,Scie nceand Econo micDe velopmen tCan‐
ada ’sRSS (s).Operatio nis subj ectto thefo llo w‐
ing twocon dition s:(1) These device sma yno t
cause interfere nce, and(2)The sedevice smu st
acc eptan yint erfere nce, including interfere nce
th at ma ycaus eunde sired oper ationof the
de vice. "
US A:"W ireless chargin gsy stem formobil ede vi‐
ces (mode l:WMI2 Wireless Mobile Interface): Thi
sde vice complieswi th Part18 oftheFCC
Ru les."
The name andaddr essofthere sponsible party
is:
peik eracus ticGmbH
Max-Planc k-St r.28-32
61 38 1Fr iedr ichsdor f
Ger man y Diagnos
ticsconnection
The diagno stics con nection isonl yint ended for
th econ nect ionofdiagnos ticdevices ataqu ali‐
fi ed specialis two rkshop. &
WARNIN GRisk ofacci dent dueto con‐
necting device sto thediagnos ticscon‐
nect ion
If yo uco nn ect devic es tothediagnos tics
con nect ionoftheve hicle, thefunc tion of
ve hicle systems andoper ating safetyma ybe
im pair ed. Gen
eral no tes 27

#
Tounlo ck:tur nth eemer gency keyco unt er-
clo ckwise toposition 0047. #
Toloc k:tur nth eemer gency keyclo ckwise to
position 0047. #
Carefully press theco veront oth eloc kcyli n‐
der until iteng ages and isseat edfirm ly. Ru
nning boards Oper
ation oftheru nning boards Mer
cedes-Ma ybachve hicl es:theve hicle is
eq uipped withelectr icallyex tenda ble ru nning
bo ards. Ifyo uha ve select edtheaut omatic mode
in themultimedia system, (/page75 )th e
ru nning board willex tend automatical lyon the
re spectiv eside when adoor isopened. Youcan
use man ualmod eto cle an theru nning boards
(/ page 332) .
% The running boards willex tend and retract
only ifth eve hicle isstatio nary.
In thefo llo wing cases ,th eru nning boards will
re tract automatical ly:
R Ifyo usele ctan off-ro ad drive pr ogram
(/ page18 2).
R Ifyo uact ivat ecar wash mode (/page330).
R Ifth eoutside mirrors fold inaut omat ically
(/ page15 7).
R Ifyo uar edr ivin gat aspee dgr ea terth an
2. 5mp h(4 km/h). If
yo uha ve select edtheaut omatic modeinthe
multime diasystem and youman uallyex tend the
ru nning boards when thedoor sar eclosed, the
ru nning boards willre main extende d,eve nif yo u
open adoor andthen close itag ain. Automatic
mode willbe react ivat ed onlywhen youar edr iv‐
ing ataspee dgr ea terth an 2.5mp h(4 km/h) .
* NO
TEDama getotheru nning boards
du ring extensi on orretracti on The
running boards extend attheside during
ex tensi on. During retracti on, theru nning
bo ards areint egr ated intheside skirt. #
Mak esur eth at ther eis suf ficie ntspa ce
du ring extensi on and retracti on. Re
ad thedispla ymessag eth at ma ybe displa yed
in theins trument cluster(/ page408). 74
Opening andclosing

%
Mer cedes-Ma ybachve hicles: whentheout‐
side mirrors fold in, theex tenda ble ru nning
bo ards willre tract ifth ese wereprev iousl y
ex tende d.
Ad jus tingthe outsi de mir rors #
Press butt on1 or3 toselect theoutside
mir rorto be adjus ted. #
Press butt on4 toadjus tth eposition ofthe
mir rorgl ass.
Eng agin gth eout side mirrors
If an outsid emir rorhas been forc ibl ydisen ‐
ga ge d, proceed asfollo ws . #
Vehicles without electr icallyfo lding outside
mir rors:manu ally mo vetheoutside mirror
int oth ecor rect pos ition. #
Vehicles withelectr icallyfo lding outsidemir‐
ro rs:pr ess and holdbu tton 2.
Yo uwill hear aclic kand themir rorwil lau di‐
bl yclic kint opla ce. The outsi demir rorwil l
no wbe setto thecor rect pos ition. Au
tomatic anti-glar emir rors functio n &
WARNIN GRisk ofaci dbu rnsand poi‐
soning duetotheanti- glar emir rorelec‐
tr olyt e
Electr olytema yescap eif th eglass inan
aut omat icant i-glar emir rorbr eak s.
The electr olyteis hazardous tohealt hand
causes irrita tio n.Itmu stnotcome intocon‐
ta ct with your skin, eye s,respir ator yor ga ns
or clo thing orbe swallo wed. #
Ifyo uco me intoco ntact withelec tro‐
ly te ,obser vethefo llo wing:
R Imm ediat elyrinse theelectr olyte
fr om your skin wit hwa terand seek
medica latt ention.
R Ifelectr olyt ecomes intocont act
wit hyo ur eyes, immediat elyrinse
th em thor oughly withclean water
and seek medicalattent ion.
R Ifth eelectr olyt eis sw allo wed,
immediat elyrinse your mout hout
th or oughl y.Do notind uce vomiting.
Seek medica latt ention immedi ately . R
Immedia tely ch ang eout ofclo thing
whic hhas been contaminat edwith
electr olyt e.
R Ifan allergic react ion occurs, seek
medi calattent ion imm ediat ely. The
inside rear vie wmir rorand theoutside mir‐
ro ron thedr iver's side willautomatic allygo into
anti- glar emode iflight from aheadlam phit sth e
sensor ontheinside rear vie wmir ror.
Sy stem limit s
The system will notgo intoanti- glar emode if:
R The engineisswit ched off.
R Reversege ar iseng aged.
R The interior light ingisswit ched on. Fr
ont- passeng erout side mirrorpar kingpos i‐
tio nfun ction %
The parking posit ionisavailable onlyin vehi‐
cles withamemor yfunct ion.
The parking position makespar king easier . 15
6
Light andvisib ility

Ov
ervie wof climat econtr olsystems No
teson climat econtr ol An
interior airfilt er incom binat ionwithth epr e‐
fi lt er intheengine compartmen tmus talw aysbe
used sothat theair con ditionin gsy stem, pollu‐
tion leve lmon itor ing and theair filtration work
cor rectl y.Mak esur eth at thefilt er isins talled
cor rectl yand thefilt er housin gin theengine
com partmen tis closed correctl yus ing thecap
and alwaystightl ysealed wheninoper ation. Use
fi lt er sre comme ndedandapprove dby
Mer cedes-Ben z.Alw aysha ve ser vice workcar‐
ri ed out ataqu alif ied spec ialistwo rkshop. Ov
ervie wof theair condit ioning control
pa nel The
indic ator lam pson thebutt ons indicat eth at
th ecor responding functionisactiv ated. Ex
am ple: cont rolpanel fordua l-zone automatic cli‐
mat econtr olwit hstatio naryheat er
1 0082 Setsthedr iver's side temp eratur e
2 A Callsup/exitstheair con ditionin g
menu
Pr essing andholding (approx.fo ur sec onds):
re se ts climat econt rolto thebasic settings
3 H Setstheair flow orswitc hesoffclimat e
cont rol
4 0058 Setsclimat econtr olto aut omat ic
mode (/page16 1)
5 0064 Defrosts thewindshield
6 006C Switchesthere ar wind owheat er
on/of f 7
0072 Switchesair-recir culation modeon/off
(/ page16 2)
8 0056 SwitchestheA/C function on/off
(/ page16 0)
Switc hesresidua lheat on/of f(/ page16 2)
9 Vehicles withcont rolpanel fordua l-zone
au tomatic climatecontr olor 3-zone auto‐
matic climatecontr olwithout statio nary
heat er:0 switches sync hroniz ation
on/ off(/ page16 2)
Ve hicles withcont rolpanel fordua l-zone
au tomatic climatecontr olor 3-zone auto‐
matic climatecontr olwith statio naryheat er:
003B switches statio naryheat eron/of f
A 0082 Setsthete mp eratur eon thefront
passeng erside Climat
econ trol 15
9

Ov
ervie wof there ar oper ating unit Ex
am ple:US A
1 Setsthete mp eratur e,lef t
2 Setstheair distribution, left
3 Setsclimat econ trol to aut omat icmode
(/ page16 1)
4 Setstheair flow
5 Switches climat econtr olon/of f
(/ page 160)
Switc hesthere sidua lheat on/of f
(/ page16 3)
6 Setstheair distribution, right
7 Setsthete mp eratur e,right The
settings forth esecon dand third row of
seats (equipment- dependent )can bemade via
th ere ar oper atingunit ,th emultimedia system
(/ page16 1) or theMBUX rear table tdepend‐
ing ontheve hicle's equipment. Oper
ating theclima tecont rolsy stem Switc
hingclima tecont rolon/of f #
Toswitc hon: setth eair flow toleve l1 or
higher usingtheH button. #
Toswitc hof f:se tth eair flow toleve l0 using
th eH button.
% Ifclimat econ trol isswitc hedoff,th ewin‐
do ws mayfo gup mor equ ickl y. Swi tchof f
cli mat econtr olonly briefly. Switc
hingtheclima tecont rolin there ar
passe nger comp artment on/off #
Press butt on5.
% When climatecontr olinthesecon dseat row
is switc hedoff,th eindicat orlam pis activ a‐
te dand OFF issho wnonthere ar displa y. Switc
hingtheA/C function onoroffvia the
cont rolpan el The
A/Cfunc tion heats ,cools anddehumidif ies
th eve hicle's interior air. #
Press the0056 button.
Switc hof fth eA/C function onlybr ief ly;ot her‐
wise, thewindo wsmayfo gup mor equ ickl y.
Con densation maydr ip from theunder sideof
th eve hicle when cooling modeisactiv e.This is
no ta sign that ther eis amalfunct ion. Calling
uptheair condit ioning menu Calling
uptheair condit ioning menuusing
th emu ltim edia system #
Sele ctone ofthete mp eratur edispla ysatthe
lo we redg eof themedia display. Ac
tiv atin g/deac tivatin gthe A/Cfunc tionvia
the multi mediasy stem The
A/Cfun ction heat s,coo lsand dehumi difies
th eve hicle's interior air. 16
0
Climat eco ntro l

#
Call uptheair -co ndition ingmenu
(/ page16 0). #
Select FirstRowofSeats . #
Select A/C. Se
tting climat eco ntr olto aut omatic mode In
automatic mode, these tte mp eratur eis con ‐
tr olled andmaint ained atacon stant leve lby the
air suppl y. #
Press the0058 button. #
Toswitc hto manu almode :pr es sth e 0058
butt on.
In aut omatic mode,youcan choose between five
dif fere nt airqu ant ities usin gth eH button.
Au tomatic mode isretained. Au
tomatic allyco ntr olling the climat eco ntr ol
in the rear passe nger comp artment In
automatic mode, these tte mp eratur eis regu‐
lat ed bythete mp eratur eof thedispensed air
and theair flow . #
Press the0058 button(/ page16 0). Se
ttin gthe airdistrib utio n #
Callup theair con ditionin gmenu
(/ page16 0). #
Select arow ofseats. #
Tosetth eair distribut ion: selec t0061,
009C or009B. #
Setth eair flow .
% Severalair distribution option scan beselec ‐
te dat thesame time,forex am ple tosetth e
cli mat econtr olforth ewindshield andthe
fo ot we llssimult aneousl y.
The 0061 climat econt rolfo rth ewindshield
can onlybe select edforth efirs tse at row . Se
tting climat econtr olforthe rear
passe nger comp artment (multime diasys‐
te m) Se
ttin gthe temp eratur e #
Call uptheair con ditionin gmenu
(/ page16 0). #
Select Second RowofSeats orThir dRow of
Seats. #
ForMa yba chvehicles: selectSecond Rowof
Seats.
% Maybac hve hicles areeq uipped withone and
tw orow sof seats. #
Setth ete mp eratur e.
Se tting theair flow #
Call uptheair con ditionin gmenu
(/ page16 0). #
Select Second RowofSeats orThir dRow of
Seats. #
ForMa yba chvehicles: selectSecond Rowof
Seats.
% Maybac hve hicles areeq uipped withone and
tw orow sof seats. #
Setth eair flow . Climat
eco ntro l 16
1

Contr
olling there ar climat eco ntr olaut omat‐
ical ly #
Select REAR AUTO.
Re ar clim atecon trol iscon trolled automat i‐
call y.
Deact ivat ing rear climat eco ntr ol #
Select REAROFF.
Re ar clim atecon trol isdeac tivated. Ac
tiv atin g/deac tivatin gthe climat eco ntr ol
syn chronizat ionfunction viathecontr ol
pa nel Climat
econ trol can besetcen trall yusing the
sync hronization function.Thetemp eratur eand
air distribution setting forth edr iver's side willbe
adop tedaut omatic allyfo rall clima tecontr ol
zones. #
Press the 0 button.
The sync hroniz ation function willbedeactiv ated
if th ese ttings forone oftheot her climat ezones
ar ech ang ed. Ac
tiv atin g/deac tivatin gthe climat eco ntr ol
syn chronizat ionfunction viathemu ltim edia
sy stem Climat
econ trol can besetcen trall yusing the
sync hronization function.Thedriver's settin gs
fo rte mp eratur e,air quant ityand airdistribut ion
ar eadop tedaut omatic allyfo rall clima tezone s. #
Callup theair con ditionin gmenu
(/ page16 0). #
Select FirstRowofSeats . #
Select SYNC. Re
mo ving conde nsatio nfrom the windo ws Wi
ndo wsfogg ed up ontheinsid e #
Press the0058 button. #
Ifth ewindo wscontinu eto fogup: press the
0064 button.
Wi ndo wsfogg ed up ontheout side #
Swit chon thewindshield wipers. #
Press the 0058 button. Switc
hingair-recir culation modeon/off #
Press the0072 button.
The interior airwill berecir cul ated.
Air -reci rculati onmod eaut omat icallyswit ches to
fr esh airmode afte rsome time.
% Ifair -recir cula tion mode isswi tched on,the
windo wsmayfo gup mor equ ickl y. Swi tchon
ai r-re cir cul ation mod eonly briefly. Switc
hingthere sidual heatonoroff Re
quirement s:
R The vehicle ispar ked.
It is possible tomak euse ofthere sidua lheat
fr om theengine tocontinu ehea ting orventil at‐
ing thefront com partmen tof theve hicle for
appr oximat ely30 min utes, depen dingonthe
te mp eratur ese t. #
Toactiv ate: press 0056 button.
Re sidua lheat willbeswitc hedoffaut omaticall y. 16
2
Climat eco ntro l