2021 MERCEDES-BENZ GLS Owners Manual

concer
ningtheoper ating permit. This also
applies incount ries inwhic hth eper missible
maximum speedforve hicle/tr ailercombinations
is abo ve62 mph(1 00 km/h).
Ve hicl eswith AIRMA TICorE-AC TIVE BODY
CONT ROL:ifth esoc ketof thetra iler hitchis
occupied, e.g.byatrailer orrear bicy clerack ,
th eve hicle issetto thenor mal leve lre ga rdless
of thedr ive pr og ram at speed sgr eat erthan
19 mp h(30 km/h). At
tac hin gth eball neck &
WARNIN GRisk ofacci dent andinjury
due toan incorrectl yins talled ballcou‐
pling
If th eball coupling isno tins talled and
eng aged cor rectly ,it ma ybeco medetach ed
dur ing trav el and endang erother road user s.
Ther eis arisk offata linj ury. #
Installand secur eth eball coupling as
descr ibedintheball coupling manufac‐
tur er's installation instruct ions . #
When theball coupling hasbeen instal‐
led, ensureth at itis cor rectly secu red
bef oreev erytrip. &
WARNIN GRisk ofacci dent dueto an
inc orrectl yins talled and secur edball
couplin g
If th eball coupling hasnotbeen correctly
ins talled and secur ed,thetra iler can become
de tach ed. #
Installand secur eth eball coupling as
descr ibedintheball coupling manufac‐
tur er's installation instruct ions . #
When theball coupling hasbeen instal‐
led, ensureth at itis cor rectly secu red
bef oreev erytrip. Re
quirement s:
R The vehicle issecur edagains tro lling away. At
tac hin gth eball neck #
Remo vecover1 from theball neckmount
in thedir ect ion ofthear row . #
Storeco ver1 sothat itcan notmo ve
ar oun d. #
Obse rveth emanuf acturer'sinstallation
ins truct ions .
Obser vetheno teson loadi ngtheve hicle. Dr
iving andparking 27
1

Coup
lingoruncou plingatrailer &
WARNIN GRisk ofinju ryfrom theve hicle
le ve lbeing chang ed
Ve hicl eswith leve lcontr olsystem: the
ve hicle leve lma ybe chang edunin tentio nally,
e.g. byother persons. Youma ybec ome trap‐
ped ifyo uco uple uporunc ouple atrailer
while theve hicle leve lis ch ang ing.In addi‐
tio n,other people couldbecome trapped if
th eir limbs arebe tween theve hicle body and
th etir es orunder neathth eve hicle.
When coupling uporuncoupling atrailer ,
mak esur eth at: #
The door sor tailg atear eno topen edor
clos ed. #
Youdo notini tiat eth eleve lcon trol sys‐
te m and donotoper ateth eDY NA MIC
SELE CTswitc h. #
Donotloc kor unloc kth eve hicle. Re
quirement s:
R The vehicle issecur edwithth eelectr icpar k‐
ing brak e. R
The transmission isin position 005D.
The trailer willbecor rectly detected bytheve hi‐
cle onlyif th efo llo wing condition sar eme t:
R The trailer isconn ectedcor rectl y.
R The trailer lighting system isin wo rking
or der .
The func tionsof thefo llo wing systems willbe
af fect ed byacor rectl yconnect edtrai le r:
R ActiveLa ne Keeping Assist
R ESP®
tra iler stabiliz ation
R Parking AssistPA RK TRONI C
R ActivePa rking Assist
R Blin dSpo tAss istor ActiveBli nd Spo tAssi st
R Drive Aw ayAssi st
R Cross Traf fic Aler t
R Rear vie wcam era
R Surround viewcam era
R AIR BO DY CONTR OL
R AIRMA TIC
R E-AC TIVE BODY CONTR OL Ve
hicl eswithout leve lcontr ol:theball head
height willchang edepen dingon theve hicle's
load. Inthis case, useatrailer withaheight -
adjus table draw bar .
Coupling upatrailer
* NO
TEDama getothest ar terbatt erydue
to full disc harg e Cha
rging thetra iler batt eryusing thepo we r
supply ofthetra iler can damag eth est ar ter
batt ery. #
Donotus eth eve hicle's powe rsupp ly
to charge thetrailer battery. Inf
ormation abouta suit ablebal lnec kfo r
Mer cedes-Ben zve hicles canbeobt ained from a
qu alif ied spec ialistwo rkshop, e.g.anaut hor ized
Mer cedes-Benz Center. #
Remo vetheco vercap from theball neck
mount andstor eit in asaf eplace
(/ page27 1). #
Position thetra iler onaleve lsur face beh ind
th eve hicle andcouple itup totheve hicle. 27
2
Driving and parking

#
Establish theelectr icalconnect ionbetween
th eve hicle andthetra iler .
% Access oriescan beconnect edtotheper ma‐
nen tpo we rsupp lyup to180W and tothe
po we rsupp lythat isswit ched on via theigni‐
tion lock.
Un coup lingatrailer &
WARNIN GRisk ofbei ng crus hed and
beco ming trap ped whenunco upling a
tr ai le r
Whe nunco upling atrai le rwi th an eng aged
ine rtia-act ivat ed brak e, your han dma y
bec ome trapped between theve hicle andthe
tr ai le rdr aw bar . #
Donotuncouple trailer swit han
eng aged ove rrunbr ak e. *
NO
TEDama gewhen uncouplin gin a
st at eof ove rrun Unc
oupling inast at eof overru ncan dama ge
th eve hicle. #
Donotuncouple trailer swit han
eng aged ove rrunbr ak e. &
WARNIN GRisk ofbeco ming trap ped
whe ndisconnecti ngthetrailer cable
Ve hicl eswith leve lcontr olsystem: The
ve hicle maylo we rwhen thetra iler cable is
discon nected.
This could result inyouor other people
becoming trapped ifyo ur or their limbs are
be tween theve hicle body andthetir es or
under neathth eve hicle. #
Mak esur eth at nobody isunde rneat h
th eve hicle orintheimmediat evicinit y
of thewheel arch es when youdisc on‐
ne ct thetrailer cable. #
Disc onnect theelectr icalconnect ion
be tween theve hicle andthetra iler . #
Uncou ple th etra iler . #
Place theco vercap ontheball neckmount . Ve
hicl eto wing instruct ions
The vehicle isno tsuit able forth euse oftow bar
sy stems that areused forflat towing ording hy
to wing, forex am ple. Attach ing and using tow bar
sy stems canlead todamag eon theve hicle.
When youar eto wing ave hicle withto w bar sys‐
te ms, safedr iving charact eristic scan notbe
guar anteed forth eto wing vehicle ortheto we d
ve hicle. Thevehicle-tr ailercombination may
sw erve from side toside. Complywithth eper‐
mitt edtowing methods (/page349) andthe
ins truct ions forto wing withbo th axle son the
gr ou nd (/ page 350). Dr
iving andparking 27
3

No
teson theIns trum ent Displa yand on-
boar dcom puter &
WARNIN GRisk ofacci dent dueto an
In stru ment Displa ymalfu nction
If th eIns trument Displayhas failed ormal‐
func tioned,thefunc tion restrictions applying
to saf etyre leva nt systems areno tvisible.
The oper ating safetyof your vehicle maybe
im pair ed. #
Drive on car efull y. #
Have theve hicle checkedimmediat ely
at aqu alif ied spec ialistwo rkshop. &
WARNIN GRisk ofdist ra ction from infor‐
mati onsystems andcomm unication s
eq uipment
If yo uoper ateinf ormat ionand comm unic a‐
tio neq uipme ntintegratedin theve hicle
when driving, youwill bedistract ed from the
tr af fic situ ation. Thiscou ldalso cau seyouto
lose control of theve hicle. #
Onlyoper ateth is eq uipmen twhen the
tr af fic situ ation per mits. #
Ifyo ucan notbe sur eof this, stop the
ve hicle whilstpa ying attention toroad
and traffic condi tions andoperate the
eq uipment withth eve hicle statio nary. Yo
umus tobse rveth eleg alrequ iremen tsforth e
cou ntryin whi chyouar ecur rentl ydr ivi ng when
op erati ng theon- boar dcom puter.
The on-boar dcom putersho wsonlydispla ymes‐
sag esand warnings from spec ific systems on
th emultifunc tiondispla y.Yo umus tth er efor e
ensur eth at your vehicle isalw aysre liable.
If th eoper ating safetyof your vehicle is
im pair ed,parkth eve hicle immediat elyand
saf ely. Con tact aqu alif ied spec ialistwo rkshop.
Mer cedes- AMGvehicl es:besur eto obser ve
th eno tesin theSupplement .Yo uco uld other‐
wise failto recogni zedangers. 27
4
Instrument Displayand on-boar dcom puter

Ins
trum ent Disp layove rview 1
Displa ycon tent on left (exa mp le:speedom e‐
te r): spee dome ter/time /date/tripcom‐
put erFrom StartandFrom Reset/rang e/
au dio/a ngleof incline andapproac h/d epar‐
tur e
The segm entson thespeedome terindica te
th est atus ofthefo llo wing systems: cruise con
trol/limit er/Active Dis tance Assist
DIS TRONI C
2 Outside temp eratur e
3 Digit alspeedome ter
4 Time
5 Displa ycont entonright (exa mp le:tac home‐
te r): tach ome ter/a verage fuel
consum ption/ ECOdispla y/navigation /G- me
ter/assi stant displa y/4MATIC/ suspe n‐
sion (equipme nt-de pen dent)
The fuel suppl ywill beinterru pted toprotect
th eengine whenthere dmar kon theta ch ‐
ome ter(o ve rrev ving rang e) isreac hed.
6 Inde xpoin ts
Thes esho wtheselect eddispla yor menu
con tent. Ins
trum ent Disp lay and on-b oard com puter 27
5

7
Coolan tte mp eratur edispla y
The coolant temp eratur edispla yis per mitt ed
to rise to248°F during normal oper ation.
Ve hicles with48 Von-boar delectr icalsys‐
te m: POWER andCHARGE displ ay(elect rical
dr ive su ppo rtand recup erati on powe rof the
electr icmo tor)
8 Select eddrive pr ogr am
9 Select edtransmiss ionposi tion
A Multifunction display (e xa mp le:standar ddis‐
pla yfo rtr ip) :Assis tance/T elep hone /Naviga‐
tion /Trip/Media/R adio/Stylesanddis‐
pla ys/Ser vice
B Fuelleve l,fuel filler flap locatio nind icat or,
ra ng e Ov
erview ofthebut tons on thest eer ing
wheel 1
P Back/Hom ebutt on,on-boar dcom ‐
put er
Pr ess and hold: showsstandar ddispla y
2 Touc hCon trol, on-bo ardco mp uter
3 Con trol pan elforcr uis econtr olor Active
Dis tance AssistDIS TRONI C 4
Contr olpa nel forMBUX multimediasy stem:
£ Voice Cont rolSy stem
ß Displa ysfavo rite s
VO L:contr olknob, adjuststhevo lume or
switc hesthesound off0063 (press)
0061 Makes/acc epts acall
0076 Rejects /end sa cal l
5 00E2 Calls up thehome screen
6 Touc hCon trol mult imed iasystem
7 G Backbutt on
8 Brightn esscontrol to adjus tth elighting in
th eIns trument Displayand inthecon trol
element sof theve hicle interior Oper
ating theon-boa rdcom puter
Obser vetheleg alrequ iremen tsforth ecount ry
in whic hyo uar ecur rently drivi ng when operat‐
ing theon- boar dcom puter. 27
6
Instrument Displayand on-boar dcom puter

The
on-boar dcom puterisoper ated using the
lef t-hand Touc hCon trol and thelef t-hand back/
home button.
When theon- boar dcom puterisbeing operated,
dif fere nt aco ustic signa lswillsou ndasoperati ng
fe edbac k,e.g. when theend ofalis tis reac hed
or when youar esc rolling thro ugh alis t.
The follo wing menusareav ailable:
R Assist anc e
R Phon e
R Navi gation
R Trip
R Radio R
Media
R Design s& Dis p.
R Service
% Youcan find informa tionab ou tth epossible
se ttings andselect ionsonthemenus inthe
Dig ital Op erator' sMa nua l. #
Tocall upthemenu bar:brief lypress the
lef t-hand backbutt onunt ilth emenu baris
displa yed.
% Ve
hicl eswithout Activ eDi stance Assist
DI ST RO NIC :pr ess the00E2 buttontocal l
up themenu baroftheon- boar dcom puter. #
Toscr ollinthemenu bar:swipe leftor
ri ght onthelef t-hand Touc hCon trol. #
Tocall upamen u,sub men uor poss ible
se ttings onthemenu ,or conf irm aselec‐
tion orsetting: press thelef t-hand Touc h
Con trol. #
Toscr ollthrough displa ysorlists on the
menu ,or select displaycont ent,afun c‐
tion, anentr yor adisp lay: swipe upwards or
down wardson thelef t-hand Touc hCon ‐
tr ol. #
Toexitasubm enu:press thelef t-hand back
butt on.
Selecting theHead -upDispla y #
Toswitc hon theHead -upDispla y:switc h
on theHead-up Displayvia themultimedia
sy stem oractiv ateit in themenu barbyswip‐
ing upw ards on thelef t-hand Touc hCon trol.
The Head -upDisplaymen uhas been selec‐
te don theHead-up Display. #
Toswitc hto theHead -upDispla y:press
th elef t-hand Touc hCon trol or swipe
upw ards on thelef t-hand Touc hCon trol. #
Toselect whattheHead -upDispla y
sho ws:sw ipe up wa rdsor down wardson the
lef t-hand Touc hCon trol.
Fu ll-scr eenmenu s
Yo ucan displ aythefo llo wing menusinfull on
th eIns trument Display:
R Assist ance
R Trip Ins
trument Displayand on-boar dcom puter 27
7

R
Naviga tion #
Onthecor responding menu,usethelef t-
hand Touc hCon trol to scr olltotheend ofthe
lis t. #
Press thelef t-hand Touc hCon trol.
The selected men uwill bedispl ayedin full. Ov
ervie wof what issho wnonthemu lti‐
fun ction display
Als osho wnonthemultifunc tiondispla y:
u ActivePa rking Assist(/ page25 7)
é Parking AssistPA RK TRONI Cdeac tiva ‐
te d(/ page24 8)
î DSR(/page 214)
h Cruis econtr ol(/ page 212)
ç ActiveDis tance AssistDIS TRONI C
(/ page 216)
ê ActiveBr ak eAssi st(/ pag e20 7)
à ActiveSt eer ing Assis t(/ page222) Ac
tiveTr af fic Ja m Assi st
( / pag e22 7)
00B0 Ac
tiveLa ne Keeping Assist
(/ page26 7)
± ActiveLa ne Chang eAssi st
( / pag e22 4)
00D6 EC
Ostar t/ stop funct ion
(/ page17 9)
00D9 HO
LD functio n(/ page 228)
00CE Ad
aptiveHig hbeam Assis t
(/ page14 6)
Ve hicl eswith Traf fic Sign Assis t:De tected
ins tructi ons and traf fic sig ns (/ page 262) .
Fo ran overvie wof theindicat orand warning
lam ps,see (/page460 ). Head
-upDispla y Fu
nction oftheHead -upDispla y The
Head- upDis playpr oje ctsth efo llo wing infor‐
matio nabo vethecoc kpit intoth edr iver's field
of vision:
R Driving speed
R Information from thena vig ation system
R Information from thedr iving systems and
dr iving safetysy stems
R Some warning mess ages
Depe ndingon theve hicle's equipment, differe nt
cont entcan besho wnintheth re edispla yar eas
of theHead-up Display(/ page27 9). 27
8
Instrument Displayand on-boar dcom puter