2021 MERCEDES-BENZ GLS SUV open hood

Ke
eping theair -water duct free #
Keep thear ea between thehood andthe
winds hieldfree ofdepos its,e.g .ice, snow
and leaves. Cleani
ngand care No
teson washing theve hicl ein acar wash &
WARNIN GRisk ofacci dent dueto
re duced braking effect afte rwa shing the
ve hicle
The braking effect isreduced afte rwa shing
th eve hicle. #
Afterth eve hicle hasbeen washed,
br ak ecar efully whilepaying attention to
th etraf fic condi tions untilth ebr aking
ef fect hasbee nful lyrestor ed. *
NO
TEDama gefrom automatic braking If
one ofthefo llo wing functionsis switc hed
on, theve hicle brak es aut omatically incer‐
ta in situat ions:
R ActiveBr ak eAssi st
R ActiveDis tance AssistDIS TRONI C
R HOLD functio n
R ActivePa rking Assist
To avo iddamag eto theve hicle, deactiv ate
th ese systems inthefo llo wing orsimilar sit‐
uation s: #
Dur ing towing #
Inacar wash *
NO
TEDama gedue touns uitable car
wa sh #
Beforedr iving intoacar wash mak e
sur eth at thecar wash issuit able for
th eve hicle dimensions. #
Ensur eth er eis suf ficie ntgrou nd clear‐
ance between theunderbody andthe
guide rails ofthecar wash. #
Ensur eth at theclear ance widthof the
car wash, inpar ticular thewidt hof the
guide rails, issuf ficie nt. To
avo iddamag eto your vehicle when usinga
car wash, ensur eth efo llo wing beforehand:
R ActiveDis tance AssistDIS TRONI Cand the
HOLD functio nar edea ctivated.
R The surround viewcam eraor there ar vie w
cam erais swit ched off.
R The side windo wsand slidin gsun roof are
com pletely clos ed.
R The outsid emir rors arefo lded in.
R The blowerfo rth eve ntil ation/he ating is
sw itched off.
R The windsh ield wipe rsw itchis in po sitio n
005A.
R The Sma rtKe yis at amin imum distance of
10 ft(3 m) away from theve hicle, other wise
th eta ilg atecould openunintentio nally. 32
8
Ma intena nce and care

Obser
vethefo llo wing pointsdur ing star tin g
assis tance and when chargin gth ebatt ery:
R Onlyuse undamag edjum per cables/c harg‐
ing cables withasuf ficie ntcross -secti onand
insu late dte rm inal clam ps.
R Non-insulat edpar tsof thete rm inal clam ps
mus tno tcom eint ocon tactwi th other metal
par tswhile thejum per cables/c harging
cable iscon nect edtothebatt ery/jum p-start
connecti onpoint.
R The jumper cable/c harging cablemus tno t
come intocont actwith anypar tswhic hma y
mo vewhen theengine isrunning .
R Alw aysmak esur eth at nei ther youno rth e
batt eryis elect rostatic allych arge d.
R Keep away from fire and open flames .
R Donotlean overth ebatt ery.
Obser vetheadditional follo wing pointswhen
ch argin gth ebatt ery:
R Onlyuse batterych arge rs tested and
appr ovedfo rMer cedes-Benz.
R Read thebatt erych arge r's oper ating instruc‐
tions beforech argin gth ebatt ery. Obser
vetheadditional follo wing pointsdur ing
st ar tin gassis tance:
R Startin gassis tance mayonly beprov ided
using vehicles, batteries orother jumpstar t
de vic es wit hano min alvoltag eof 12 V.
R The vehicles mustno tto uc h.
R Vehicl eswith aga soline engine: Jump-
st ar tth eve hicle onlywhen theengine and
ex haus tsy stem arecold. St
arting assistance andchargin gth e12 V
batt ery Re
quirement s:
R The vehicle issecur edwithth eelectr icpar k‐
ing brak e.
R Vehicl eswith automatic transmiss ion:
The transmis sionisin posi tion 005D.
R The igniti onand allele ctrical consumer sar e
swi tched off.
R The hood isopen. Ex
am ple:engine compartment #
Slid eco ver1 ofposi tiveclam p2 onthe
jum p-starting con nection point inthedir ec‐
tion ofthear row . #
Con nect posi tiveclam p2 onyour vehicle to
th epositiv epole ofthedonor batteryusing
th ejum per cable/c harging cable. Always Br
ea kdo wnassista nce 34
7

*
NO
TEDama gedue toinc orrect fus es Electr
icalcom pone ntsorsystems maybe
damag edbyinc orrect fus es, ortheir func ‐
tion ality maybe signif icantlyim pair ed. #
Onlyuse fuses that have been approved
by Mer cedes-Ben zand whic hha ve the
cor rect fus era ting . Blo
wn fuse smu stbe replaced withfuses ofthe
same rating ,wh ich yo ucan recogni zeby the
colo rand fusera ting .The fuse rating sand fur‐
th er information tobe obser vedcan befound in
th efuse assignmen tdiagr am.
Fu se assignment diagram: onthefuse boxin
th ecar gocom partmen t(/ page355).
* NO
TEDama geormalfunct ionscaused
by mois ture Mois
turema ycause damagetotheelectr ical
sy stem orcause itto malfu nction. #
When thefuse boxis open, makesur e
th at no mois turecan enterthefuse
bo x. #
When closing thefuse box,mak esur e
th at theseal ofthelid isposition edcor‐
re ctly onthefuse box. If
th ene wlyinser tedfuse alsoblows,ha ve the
cau setrace dand rectif ied at aqu alif ied spec ial‐
is two rkshop.
Ensur eth efo llo wing beforere placing afuse:
R The vehicle issecur edagains tro lling away.
R Allelectr icalconsu mersar esw itched off.
R The igniti onissw itched off.
The electr icalfu ses arelocat ed invarious fuse
bo xes:
R Fuse boxin theengine compartmen ton the
lef t-hand sideoftheve hicle, when viewe din
th edir ect ion oftrave l(/ page35 4)
R Fuse boxon thedr iver's side ofthecoc kpit
(/ page355) R
Fuse boxin thefront passeng erfoot we ll
(/ page355)
R Fuse boxin thecar gocom partmen ton the
ri ght-h andside oftheve hicle, when viewe d
in thedir ect ion oftra vel(/ page355 ) Opening
andclosing thefus ebo xin the
engine compartmen t Re
quirement :
R Youne ed adr yclo thand asc rewdr iver .
Obser vetheno teson electr icalfuses
(/ page353).
Opening &
WARNIN GRisk ofinju ryfrom using the
winds hieldwiper swhile theengine hood
is open
When theengine hoodisopen andthewind‐
shield wipersar ese tin mo tion ,yo ucan be
tr apped bythewiper linkage. 35
4
Breakdo wnassis tance

#
Alw aysswitc hof fth ewindshield wipers
and ignition beforeopening theengine
hood. #
Remo veanyex istin gmois turefrom thefuse
bo xusing adr yclo th. #
Loosen screws2 and remo vefuse boxlid
1 from theto p. Closing #
Chec kwhe ther theseal isposition edcor‐
re ctly inthelid. #
Inser tth elid intoth ebr ac ketat there ar of
th efuse box. #
Folddo wn thelid ofthefuse boxand tight en
scr ews2. #
Close thehood. Opening
andclosing thefus ebo xin the
coc kpit The
fuse boxis on theside ofthedashboar d
under aco ver. #
Con tact an author ized Mercedes-B enzCen‐
te rfo rfur ther information . Opening
andclosing thefus ebo xin thefront
pa sseng erfoot we ll #
Cont actanaut hor ized Mercedes- BenzCen‐
te rfo rfur ther information . Opening
andclosing thefus ebo xin the
car gocom partmen t Ob
serveth eno teson electr icalfuses
(/ page353). #
Open theside cover. #
Remo vecover1.
The fuse allocation chartis on theside ofthe
fuse box. Br
eakdo wnassi stanc e355

Disp
laymes sages
Possible causes/conseq uencesand0050 0050
Solutions #
Pull overand stop theve hicle safely assoon aspossible, paying attention toroad and traf fic condi tions.
Do notcontinu edr ivi ng und eranycir cums tances. #
Consu ltaqu alif ied spec ialistwo rkshop. 0051
*A
tle as tone door isop en. #
Close alldo ors.
0066 *T
hehood isopen. &
WARNIN GRisk ofacci dent dueto driving withth ehood unlocked
The hood mayopen andblockyo ur vie w. #
Neverre lease thehood when driving. #
Beforeev erytrip, ensur eth at thehood isloc ked. #
Stop theve hicle immediat ely,pa ying attention toroad and traf fic condi tions. #
Close thehood.
0065 *T
hetailg ateis open . Disp
lay mess ages and warning/ indic ator lam ps 41
9

Engine
Displa
ymes sages
Possible causes/conseq uencesand0050 0050
Solutions
To switch engine off,press
and hold Start/S topbut-
ton foratleast 3secon ds
or press 3times. *Y
ouhave pressed thest ar t/ stop butt onwhile theve hicle isin mo tion. #
Information aboutswitchingoffth eengine whiledriving (/page16 9).
00BD
Che ckCoo lant Level See
Opera tor'sManu al *T
hecoolant leve lis toolow.
* NO
TEEngi nedama gedue toinsuf ficie ntcool ant #
Avoid long journeys wit hins ufficie ntcool ant. #
Addcoolant (/page326 ). #
Have theengine cooling system checkedat aqu alif ied spec ialistwo rkshop.
ÿ
Coola ntToo HotStop Vehi-
cle Turn Engine Off *T
hecoolant istooho t. #
Pull overand stop theve hicle safely and switc hof fth eengine, paying attent ion toroad and traffic condi tions. &
WARNIN GDang erofburnswhen opening thehood
If yo uopen thehood when theengine hasoverheat edordur ing afire intheengine compartmen t,yo uco uld
co me intoco ntact withho tga ses orother escaping operating fluids. #
Beforeopen ingthehood, allowtheengine tocool down. Disp
lay mess ages and warning/ indic ator lam ps 423

Engine
Wa
rning/indicat orlam p
Possible causes/conseq uencesand0050 0050
Solutions
ÿ Coolant warning lam p The
redcoolant warning lam pis lit while theengine isrunning .
*P oss ible cau ses:
R The temp eratur esensor ismalfunct ioning
R The coolant leve lis toolow
R The airsupply tothera diat orisobs truct ed
R The radiat orfanis faulty
If th er eis an additional warning tone, thecoolant temp eratur ehas exceeded themaximum permissible temp eratur e. &
WARNIN GDang erofburnswhen opening thehood
If yo uopen thehood when theengine hasoverheat edordur ing afire intheengine compartmen t,yo uco uld
co me intoco ntact withho tga ses orother escaping operating fluids. #
Beforeopen ingthehood, allowtheengine tocool down. #
Intheeve ntofafire intheengine compartmen t,ke ep thehood closed andcallthefire ser vice. #
Pull overand stop theve hicle safely and switc hof fth eengine, paying attent ion toroad and traffic condi tions.Do
no tcontinu edr ivi ng. #
Notethemessag eson themultifunc tiondispla y.
If th ecoolant temp eratur edispla yis at thelowe rend ofthete mp eratur escale: 46
4
Displa ymessag esand warning/ indic ator lam ps

Hill
star tassi st<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011001100110011> 227
HOL Dfunc tion<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011001100110011> 228
Fu nctio n/no tes ...... ............................. 228
Switc hingon/of f................................. 228
Home screen (media display)
Ov ervie w .................. ........................ ... 282
Hood Opening/closing ................................. 322 I
Identif ication plate
Engine .................................................3 92
Re frig er ant .................. ........................ 400
Ve hicle ............................................. ... 392
Ignition Switc hingon(Start/S topbutt on) ........ 168
Ignit ionkey
see Smar tKey
Imm obiliz er................................................ 90
Indi catorlam ps
see Warning/ indic ator lam ps
Individ ualdrive pr og ram
Con figur ing ......... ................................. 184 Sel
ecting <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011> 184
Insid ere ar vie wmir ror
see Exterior mir rors
Insp ectio n
see ASSYST PLUS
Ins trument cluster
Fu nctio n/no tes ............................2 74,27 5
Ins trum ent Disp lay
Fu nctio n/no tes ................................... 275
Ins trument cluster ..... ............................ 10
Wa rning/ indic ator lam ps................ .... 460
Ins trum ent Displa yand on-boa rd
com puter
Fu nctio n/no tes .................................... 274
Int ellig entLight System
Ad aptiveHig hbeam Assis t.............. .....1 46
Cor nering light ....... ............................ ..146
Int erior ligh ting.......................................1 48
Ambient lighting .................................. 149
Re adin glight .................................. ...... 148
Se tting <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011> 148
Swi tch-of fdel aytim e........... ................149 Int
erior motion sensor
Ac tivati ng/d eactiv ating ........... ..............92
Fu nctio n<0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011001100110011> <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011> 92
In te rn et radio
see TuneIn
Io nizatio n
Ac tivati ng/d eactiv ating (MBUX mul‐
tim ediasystem) ................................... 163
iPhone ®
see Smar tphoneintegratio n® J
Jac k
St or ag elocation ..................................3 78
Jum p-startconne ction ............................3 47
Gene ralno tes ...................................... 345 K
KEY LESS-GO
Loc king theve hicle ................................ 71
Pr oblem .................................................7 2
Un loc kin gse tting .................................. 68
Un loc kin gth eve hicle ............................7 1 490
Index