warning MERCEDES-BENZ GLS 2021 Owner's Guide

The
system maybe impair edorma yno tfunc tion
in thefo llo wing situat ions:
R Ifth er eis poor visibility ,e.g. due toinsuf fi‐
cie ntillu mina tionofthero ad, ifth er ear e
highl yva riable shade condition sor inrain,
sno w,fogor hea vyspr ay.
R Ifth er eis glar e, e.g .fr om oncom ingtraf fic,
th esun orreflect ions.
R Ifth ewindshield inthear ea ofthemultifunc ‐
tion camer ais dir ty,or ifth ecamer ais fog‐
ge dup, damag edorcovered.
R Ifth er ear eno lane marking s,or several
unc lear lane markingsarepr esen tfo rone
lane, e.g.around roadw orks .
R Ifth elane marking sar ewo rn,dar kor cov‐
er ed.
R Ifth edis tance from theve hicle infront istoo
shor tand thus thelane marking scann otbe
de tected.
R Ifth elane marking sch ang equ ickl y, e.g.
lanes branc hof f,cr oss one another or
mer ge.
R Ifth ero ad isvery nar row and wind ing. R
Vehicl eswith Drivin gAss istanc ePa ck‐
ag e:ifth era dar sensor sin there ar bum per
ar edir tyor coveredin sno wand anobs tacle
is de tected inyour lane ,no lane -cor recting
br ak eap plica tion take splace.
Ac tiv atin g/deac tivatin gAc tiv eLan eKe eping
Assis t
Multi media system:
4 © 5
Set ting s5
Quick Access
5 Act ive Lane Keeping Assist #
Activateor deacti vate thefunc tion.
Se tting Activ eLan eKe eping Assist
Multi media system:
4 © 5
Set ting s5
Assist ance
5 Act ive Lane Keeping Assist
Se tting thesensit ivity
% The availabilit yof this func tion isdepen dent
on thecount ry. #
Select Stand ard,Sensi tiveorOff. Ac
tiv atin gor deac tivatin gthe hapticwarning #
Selec tWarnin g.
Ac tivateor deacti vate thefunc tion. Tr
aile rhitc h No
teson trailer operation Mer
cedes‑AMG vehicl es:obse rveth eno tesin
th eSupplement .Yo uco uld other wise failto rec‐
ogni zedangers. &
WARNIN GRisk ofacci dent dueto
uns uitable ballneck
If yo uins tallan unsuit ableballneck,this ma y
re sult inthetrailer hitchand rear axle being
ove rloaded.
As aconseq uence, thehandling charact eris‐
tic sma ybe hea vilyim pair edand thetrailer
could become detach ed. Ther eis arisk of
fa ta linj ury. #
Onlyins talla ball neckth at con form sto
th eper mitt eddimension sand hasbeen Dr
iving andparking 269

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

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

Selec
tingwhat theHead -upDispla ysho ws (Ex
am ple)
1 Switc hestheHead-up Displayon/ off
2 Leftdispla yar ea
Na vig ation system
Inc lination ,gr adient andcompass
Av erag econ sum ption
G-me ter
3 Centraldispl ayarea
Se tspee din thedr iver assis tance system,
e.g. cruise control
Wa rnings from driver assis tance systems,
e.g. distance warning 4
Right displa yar ea
Tr af fic Sign Assist
ve hicle leve l
Dif fere ntia l
Assi stant displa y
5 Toadjus tth eposition ,br ightn essand lowe r
displa yar ea
6 Inde xpoint s
7 Lowe rdisp lay ar ea
Displa yar eas 2to4 that areno tre qu ired can
be hidden .
% Inaudio mode, thest atio nnam eor trac kwill
be sho wntemp orarily when theaudio source
is being activelyoper ated. Inaddition, the
lat estcalls willbedispla yedwhen thete le‐
phon elis ton theIns trument Displayis
activ elyoper ated. #
Toselect adispla y:swipe upwards on the
lef t-hand Touc hCon trol. #
Press thelef t-hand Touc hCon trol. Swit
ching theHead -upDispla yon/of fvia the
mu ltim edia system Multi
media system:
4 © 5
Set ting s5
Quick Access #
Select HUD.
The Head-up Displayis activ ated. 280
Instrument Displayand on-boar dcom puter

-
Author izing andde-aut horizing devices
R Time &dat e
R Langu age
R Units fordis tance
R Softwareup dates
R Dat aim po rt/e xpor t
R PIN protect ion
R System Reset Inf
ormat iononimpor tant system updates Im
por tant system updat esma ybe neces saryfo r
th esecur ityofyour mult imed iasystem's data.
Ins tallth ese updat es,orelse thesecur ityofyour
mult imed iasystem cann otbe ensur ed.
A sy stem updat econ sistsof thre esteps:
R Downloading orcop ying ofthedat are qu ired
fo rins tallation
R Installation ofthedo wnloaded system updat e
R Activati on ofthedo wnloaded system updat e
by restar tin gth esy stem %
Ifaut omatic softwareupdat esareactiv ated,
th esy stem updat eswill bedownloaded auto‐
maticall y.
The multimedia system prov ides amess age
when asy stem updat eis available.
Yo uha ve thefo llo wing selectionoption s:
R Accept andInstall
The system updat ewill bedownloaded inthe
bac kground .
R Infor mat ion
In fo rm atio nabout thepending system
updat eis displa yed.
R Later
The system updat ecan bedownloaded man‐
uall yat alat er time.
Deep system updates
Dee psy stem updat esaccess vehicle orsystem
se ttings andcanther efor eonl ybe car ried out
when theve hicle isstatio naryand theignition is
switc hedoff.
If th edo wnload ofadeep system updat eis com‐
ple tedand thedo wnloaded system updat eis re
ady forins tallation ,yo uwill beinformed ofthis
af te rth ene xt ignition cycle, forex am ple.
% Park theve hicle safely inasuit able location
bef orest ar tin gth eins tallation .
Re quiremen tsforth eins tallation :
R The ignit ionisswitc hedoff.
R Notesand warnings have been read and
acc epted.
R The elect ric pa rking brak eis applied.
If all requ iremen tshave been fulfilled, thedo wn‐
loaded system updat eis ins talled. Themultim e‐
dia system cann otbe oper ated while thedo wn‐
loaded system updat eis being installed and
ve hicle functionsarere strict ed.
If er ro rs should occurduring theins tallation ,th e
multime diasystem automatic allyatt em ptsto
re stor eth epr ev ious version. Ifre stor ation ofthe
pr ev ious version isno tpossible ,a symbol
appear son themedia display.Con sult aqu ali‐
fi ed specialis two rkshop toresolv eth epr oblem. 290
MBUX multimedia system

Connect
ingprev iousl yaut hor ized Bluetooth®
audio equipment #
Select aBlue tooth®
audio devic efrom the
lis t.
The connection isbeing established. Ov
ervie wof thesym bols andfunctions inthera dio menu Symbo
lD esignation Function
© HomeSelecttoretur nto thehome screen.
j MessagingSelecttocal lup mess aging.
00F500F6 Skip
forw ards/ backS electtoskip tothene xt or tothepr ev ious statio n.
Z Options Select tohave further option ssho wn. Settings canbemade tothefo llo wing addi‐
tion alfunc tions,forex am ple:
R Navig ation andtraf fic annou ncements
R Freq uency Fixfunc tion
R Radio additional text
R Emerg encywarnings
The setting option sar ecoun try- dependen t. MBUX
multimedia system 31
5

Emer
gency Re
mo ving the safetyve st The
safetyve stsar elocat edinthesaf etyve st
com partments inthedr iver's andfront
passeng erdoor stow agecom partment s. #
Toremo ve:pu llou tsa fety vest bag 1by
loop 2. #
Open safetyve st bag 1and remo vethe
saf etyve st.
% Addition alsaf etyve stscan bestor ed inthe
st ow agespac eof there ar passe nger com ‐
par tment and inthecar gocom partmen t. 1
Maximum numberofwa shes
2 Maximum wash temp eratur e
3 Donotbleac h
4 Donotiron
5 Donottumble dry
6 Donotdr yclean
7 This isaclass 2ve st The
requ iremen tsdef ined bytheleg alstandar d
ar eon lyfulfille d ifth esaf etyve st isthecor rect
size andisful lyclos ed.
Re place thesaf etyve st inthefo llo wing cases :
R Itis damag edordir ton there flect ive st rips
can nolong erbe remo ved.
R The maximum numberofwa shes isexc ee‐
ded.
R The fluor esc ence ofthesaf etyve st has
fa ded. Wa
rning triang le Re
mo ving the warning triang le 336
Breakdo wnassis tance

#
Remo vewarning triang le1.
Se tting upthewa rning triang le #
Foldside reflect ors1 upw ards toform atri‐
ang leand attachat theto pusing upper
pr ess-s tud2. #
Foldlegs 3down and outtotheside. Fi
rs t-aid kit(sof t-si ded) overview Mer
cedes‑M aybac hve hicl es In
theas-deliv ered stat e, thefirs t-ai dkit (sof t
si de d) isin thecar gocom partmen ton theright-
hand sidebehind service flap 1. All
other vehicl es Ex
am ple:fi rs t-ai dkit (sof tsi de d)
In theas-deliv ered stat e, firs t-ai dkit (sof tsi de d)
1 isin thecar gocom partmen tin thelef t-hand
or right-h andstow agecom partment ,depen ding
on themodel. Br
eakdo wnassis tance 33
7

Flat
tire No
tesin theeve ntofaflat tire &
WARNIN GRisk ofacci dent dueto aflat
tir e
A flat tirese verely affects thedr iving charac‐
te rist ics aswellas thesteer ing and braking
of theve hicle.
Ti re swith outrun-flat charact eristics : #
Donotdr ive wit haflat tire. #
Chan getheflat tireimm ediat elywit han
emer gency sparewheel orspar ewheel.
Alt ernat ivel y, consu ltaqu alif ied spe‐
cialis two rkshop.
Ti re swith run-flat charact eristics : #
Obse rveth einf ormation andwarning
no teson MOExt ended tires (run-f lat
tir e). In
theeve ntofaflat tire, thefo llo wing option s
ar eav ailable dependingon your vehicle's equip‐
ment :
R Vehicl eswith MOExt endedtir es: itis pos‐
sibl eto continu eth ejour neyfo ra shor t
per iod oftime. Makesur eyo uobse rveth e
no teson MOExt ended tires (run-f lattires)
(/ page338).
R Vehicl eswith aTIREF ITkit :yo ucan repair
th etir eso that itis poss ibletocontinu eth e
jou rney fora shor tper iod oftime. Todo this,
use theTIREFI Tkit (/ page339).
R Vehicl eswith Mercedes meconne ct:you
can makeacal lfo rbr eakdo wnassi stanc evia
th eov erhead control panel inthecase ofa
br eakdo wn(/ page304).
R Allvehicl es:chang eth ewheel
(/ page37 9).
% Theem erge ncy sparewheel isonl yav ailable
in cer tain coun tries. No
teson MOExt ended tires (run-fl attires) &
WARNIN GRisk ofacci dent whendr ivi ng
in limp -hom emod e
Whe ndr ivi ng ineme rgency modeth ehan‐
dling charact eristic sar eim pair ed. #
Donotexc eed thespecif iedmaximum
speed oftheMOEx tende dtir es. #
Avoid anyabr uptst eer ing and driving
maneuv ersas wellas drivin gove r
obs tacle s(cu rbs, pothol es, off-r oa d).
Thi sap plies, in pa rticular ,to aloaded
ve hicle. #
Stop driving intheemer gency mod eif
yo uno tic e:
R Ban gingno ise
R Vehicle vibration
R Smok ewhic hsmells likeru bber
R Contin uousESP®
int erve ntio n
R Crac ks inthetir eside walls #
Afterdr iving inemerg encymode, have
th erims checkedby aqu alif ied spec ial‐ 338
Break down assis tance

is
two rkshop withre ga rd totheir further
use. #
The defective tir emus tbe replaced in
eve rycase . Wi
th MOExt ended tires (run-f lattires), youcan
co ntinue todrive yo ur vehicle evenif th er eis a
tot alloss ofpressur ein on eor mor etir es. How‐
eve r,th etir eaf fect ed mus tno tsho wan ycle arly
vis ible da mag e.
Yo ucan recogni zeMOExt endedtir es by the
MOExt ended marking whichappear son theside
wa llof thetir e.
Ve hicl eswith tirepr ess uremonit oring sys‐
te m: MOExt endedtires ma yonly beused incon‐
junc tionwi th an act ivat ed tirepr essur emon itor‐
ing system.
If apr essur eloss warning mess ageappear sin
th emultifunc tiondispla y,proceed asfollo ws :
R Chec kth etir es fordama ge.
R Ifdr iving on,obser vethefo llo wing notes. Dr
iving distance possible inemer gency
mode afte rthe pres sur elo ss wa rning: Load
condit ion Driving distance pos‐
sible inemer gency
mode
Pa rtiall yladen 50miles (80km)
Fu lly laden 19mile s(30 km) The
driving distance possi ble in eme rgency
mod ema yva ry dependin gon thedr iving style.
Obser vethemaximum permissible speedof
50 mph(80 km/h).
If atir ehas gone flat and cannotbe replaced
wit han MOEx tende dtir e, youcan useast and‐
ar dtir eas ate mp orarymeasur e. TIREFIT
kitstorage location The
TIREF ITkit islocat edunder thecar gocom‐
par tmen tfloor . Ex
am ple: TIREFIT kit
1 Tire seala ntbottle
2 Tire inflation compressor Using
theTIR EFIT kit Re
quirement s:
R Tire seala ntbottle and tireinf lation compres‐
sor (/ page339).
R TIREFIT sticke r
R Gloves(depending ontheve hicle equipment)
Yo ucan useTIRE FITtir esealan tto seal perfora ‐
tio nda ma geofup to0.16 in(4 mm), particular ly Br
eakdo wnassis tance 33
9