engine MERCEDES-BENZ GLS 2021 Workshop Manual

Multimedia
system:
4 © 5
Set ting s
5 Sch nellzugrif f(Quic kaccess) #
Select LowerWhenGettingIn On .
The vehicle islowe redto low leve l-2 tofacil i‐
ta te ent ering and exitin g.
% The availabilit yof this func tion depen dson
th eve hicle equipment.
% Further information onAIRMA TIC
(/ page229).
Lo we ring and raising there ar oftheve hicl e &
WARNIN GRisk ofentr apment from vehi‐
cle lowe ring
Whe nlowe ring theve hicle, people could
become trapped ifth eir limbs arebe tween
th eve hicle body andthetir es orunder neath
th eve hicle. #
Mak esur eno one isunder neathth e
ve hicle orintheimmediat evicinit yof
th ewheel arch es when theve hicle is
being lowe red. Re
quirement s:
R Allvehicle doorsar eclosed
R Ther eis no trailer coupled
R Ther eis no bicy clerack installed
R The batteryis suf ficie ntly charge d; ifnec es‐
sar y,star tth eengine
Lo we ring there ar oftheve hicl e #
Apply theelectr icpar king brak e. #
Shif tth etra nsmiss iontoposition 005D
(/ page18 6). #
Pullsw itch 1 intheright-h andcargocom‐
par tmen ttr im brief ly.
Indicat orlam p2 flashes untilth eve hicle
has been lowe red.
The vehicle islowe redat there ar axle by
appr ox.1. 5 in (40 mm) .When theve hicle has
been lowe red, indicat orlam p2 remains lit.
When there ar oftheve hicle hasbeen com‐
ple tely lowe red, indicat orlam p2 remains
lit.
Lo we ring isint erru pte din thefo llo wing situa‐
tion s:
R Ave hicle doorisopened
R Switc h1 ispulle dag ain
R The vehicle isbeing driven faster than
1. 2 mp h(2 km/h).
% The vehicle isaut omaticall yse tto theleve l
of themos tre cently select eddrive pr ogr am
if yo udr ive at spee dsgreat erthan 1.2 mp h
(2 km/ h). Dr
iving andparking235

If
indicat orlam p2 flashes twiceand there ar of
th eve hicle does notlo we r: #
Mak esur eth at there qu iremen tsareme t.
% Lowe ring there ar oftheve hicle allowsthe
ve hicle tobe loaded moreeasil y.Obser ve
th eno teson loadi ngtheve hicle when doing
th is (/ page11 9).
Ra ising there ar oftheve hicl e #
Che ckifth ebatt eryis suf ficie ntly charge d. If
nec essar y,star tth eengine. #
Pull switc h1 brief ly.
Indic ator lam p2 goes out.
The vehicle willberaised tothecur rently
sel ect edleve l.
% The vehicle isaut omaticall yse tto theleve l
of themos tre cently select eddrive pr ogr am
if yo udr ive at spee dsgreat erthan 1.2 mp h
(2 km/ h).
If th eve hicle canno tbe raised: #
Ensur eth at thebatt eryis suf ficie ntly
ch arge d; ifnec essar y,star tth eengine.
The raising proces scon tinues. E-
AC TIVE BODY CONT ROL Fu
nction ofE-AC TIVE BODY CONT ROL
E- AC TIVE BODY CONTR OLisan electr ohydr aulic
suspe nsion system withva riable dampingfo r
im prov ed driving comfort.The all-round leve l
contr olsystem ensur esthebes tpossible sus‐
pension andconstant groun dcle aranc e,eve n
wit haladen vehicle. When driving atspeed, the
ve hicle islowe redaut omatic allytoimprove driv‐
ing safetyand toreduce fuelconsum ption. The
suspen sionsetting isadjus teddependin gon the
ro ad sur face, vehicle loadandthedr ive pr ogr am
select ed.
The ROAD SUR FACE SCAN function detects
ar ea sof une venness inthero ad bef oreyo udr ive
ove rth em bymeans ofamultifu nctioncamera.
This reduces chassis movements.
The dam ping isadju sted individually toeac h
wheel anddepends onthefo llo wing fact or s:
R Driving style, e.g. spor ty
R Road con dition ,e.g .bum ps
R Drive pr ogram E-
AC TIVE BODY CONTR OLiscom prised ofthe
fo llo wing functionsand compone nts:
R Vehicl eswith Drivin gAss istanc ePa ck‐
ag e:RO AD SUR FACE SCAN
R Cur veinc linat ionfunc tion CURVE
R Recovery mode
R Individ ualwhee lcontr ol
R Airsusp ension withau tomatic leve lcon trol
R Speed -dependentlo we ring toreduce fuel
con sum ption
R Manual leve ladjus tment
R ADSPL US (Adap tiveDam ping System with
con stant adjus tment ofdam pingch aract eris‐
tic s)
R DYNA MIC SELE CTswitc hand leve lbutt on.
Susp ension settings andvehicl eleve lper
dr ive pr og ram
Dr ive pr og ram C
R The susp ension setting isfirm er.
R The vehicle issetto Spor tle ve l.
R ROAD SUR FACE SCAN isdeac tivated. 236
Drivin gand parking

Pa
rking AssistPA RK TRONI Cdisp lay: vehicles
wit hasur round viewcam era
1 Operation alfron tand rear
2 Operation alfron t,re ar and sides
3 Obstacle sde tected atthefront right (red)
Sa vedobs tacle son thesides aredele tedin the
fo llo wing situat ions,fo rex am ple:
R Youpar kth eve hicle andswitc hof fth eigni‐
tion .
R Youopen thedoor s.
Af terth eengine isrestar ted, obs tacle son the
sides mustbe detected again bef oreane w
wa rning can beissued. Sy
stem limit s
The system limits forPa rking Assist
PA RK TRONI Cappl yto passiv eside impact pro‐
te ction.
The follo wing objectsar eno tde tected, forex am‐
ple:
R Pedes trians who approachth eve hicle from
th eside
R Objec tsplaced next to theve hicle
Ac tiv atin g/deac tivatin gPa rking Assis t
PA RK TRONI C
* NO
TERisk ofan acci dent from objects
at clo serang e Pa
rking AssistPA RK TRONI Cma yno tde tect
cer tain obje ctsat clos era ng e. #
Whe npa rking ormane uvering theve hi‐
cle, paypar ticular attention toany
obj ect swhic har eabo veorbelo wthe
sensor s,e.g. flowe rpo ts or draw bar s.
The vehicle orother object scould oth‐
er wise bedamag ed. Re
quirement s:
R The camera menuis open.
R Or:Ac tivePa rking Assistis act ive.
R Or:th ePA RK TRONI Cpop- upwin dow
appear s.
% Mak esur eth at ther ear eno per sons, ani‐
mals orobjec tsinthemaneuv ering area
while maneuv ering and parking in/exiting
par king spaces. #
Tapé inthemedia display.
% Ifth eé symbol issho wninthemultifunc ‐
tion displa y,Pa rking AssistPA RK TRONI Cis
no tact ive. Pa rking AssistPA RK TRONI Cis
aut omat icallyact ivat ed when theve hicle is
st ar ted.
Alt ernativ ely,Pa rking AssistPA RK TRONI Ccan be
act ivat ed ordeac tiva tedin thequ ick acc ess
men u. 24
8
Driving and parking

R
The attention leve lde term ined byATTENTION
ASS IST:
- thefuller thecir cle, thehigher theatt en‐
tion alleve lde term ined
- asyour att entio nwa nes, thecir cle inthe
cent erofthedispla ybecomes smaller
If AT TENTION ASSISTis unable tocal cul ateth e
att ent ion leve land cannotissue awa rning, the
Sys tem Suspend edmes sage appear s.
If awa rning isgiv en intheIns trument Display,
th emultimedia system offers to sear chfora re st
ar ea. Youcan selectare st area and star tna vig a‐
tio nto this rest area. This function can beact iva‐
te dand deactiv ated inthemultimedia system.
If AT TENTION ASSISTis deactiv ated, theÛ
symbol appearsin theassis tance grap hicin the
Ins trument Displaywhen theengine isrunning .
AT TENTION ASSISTis activ ated aut omaticall y
when theengine isre-sta rted. The lastselect ed
sensit ivityleve lre mains stor ed.
Sy stem limit s
AT TENTION ASSISTis activ ein the37 mph
(60 km/ h)to 124mp h(2 00 km/h) speedra ng e. The
func tional ity ofATTENTION ASSISTis
re strict ed, and warnings maybe dela yedor not
occ uratall inthefo llo wing situat ions:
R Ifyo uha ve been driving forless than appr ox‐
imat ely30 min utes.
R Ifth ero ad con dition ispoor (unevenro ad
sur face orpotholes).
R Ifth er eis ast ro ng side wind.
R Ifyo uadop ta spor tydrivin gst yle (high cor‐
ner ing speeds orhigh ratesof acceler ation).
R Ifth eSt eer ing Assis tfunc tion ofActiveDis ‐
ta nce AssistDIS TRONI Cis acti ve.
R Ifth etime hasbeen setincor rectly .
R Ifyo uch ang elane sand vary your spee dfre‐
qu ent lyIn activ edr iving situation s.
The ATTENTION ASSISTtir edness oraler tnes s
assessment isdele tedand restar tedwhen con‐
tin uing thejour neyin thefo llo wing situat ions:
R Ifyo uswit choffth eengine.
R Ifyo uunf astenyo ur seat beltandopen the
dr iver's door (e.g.chang ingdriver sor taking
a br ea k). Se
ttin gAT TENTI ONASSIST
Multimedia system:
4 © 5
Set ting s5
Assist ance
5 Atten tion Assist
Se tting options #
Select Standard, SensitiveorOff.
Sugg esting are st area #
Select SuggestRes tArea. #
Activateor deacti vate thefunc tion.
If AT TENTION ASSISTde tects fatig ue or
incr easing lack ofatt ention ,it sugg ests a
re st area inthevicinit y. #
Select thesugg estedre st area.
Yo uar eguided totheselect edrest area. Tr
af fic Sign Assis t Fu
nction ofTraf fic Sign Assis t
Tr af fic Sign Assistdetects traf fic sig ns with the
multifu nctioncamera(/ page20 1). Itassi sts
yo uby displa yingdetected spe edlimits and
ove rtakin gre strictions intheins trument cluster 262
Driving andparking

designed
forth ere qu iremen tsof trailer
opera tion. #
Donotch ang eth eball neckor the
tr ai le rhi tc h. The
values approvedby themanuf acturercan be
fo und ontheidentif ication platesand inthe
"T ec hn ical data"sec tionunde r"T ra iler hitch"for
th eto wing vehicle (/page406). &
WARNIN GSw erving oftheve hicle/
tr ailer combination duetoinc reased
spee d
Yo uco uld lose contro lof theve hicle/tr ailer
combination.
The vehicle/tr ailercombination mayeve ntip
ove r. #
Under nocircums tances should yo utry
to stra ight entheve hicle/tr ailercombi‐
nation byinc reasin gth espeed. #
Reduce your spee dand donotco unt er‐
st eer . #
Ifneces sary,appl yth ebr ak es. *
NO
TEDama getotheengine asare sult
of ove rheating #
Ifyo ure trof itatrai le rhi tc h, mod ifica ‐
tio ns totheengine cooling system may
be neces sary,dependin gon theve hicle
model.
When retrof itti ng atrai le rhi tc h, ob serveth e
fa stening pointson thech assis . Re
trof itti ng atrai le rhi tc his pe rm issible onlyif a
trailer loadisspec ified inyour vehicle docu‐
ments. Ifth is is no tth ecase, theve hicle isno t
appr ovedfo rtr ail er oper ation.
Fu rther information canbeobt ained ataqu ali‐
fi ed specialis two rkshop.
If th etrailer coupling isde tach able, itis esse n‐
tial tocom plywith theoper ating instruction sof
th etrailer coupling manufacturer.
Couple anduncouple thetrailer carefull y.Ifyo u
do notcon nectth etra iler totheto wing vehicle
cor rectl y,thetrailer maybecome detach ed. Obser
vethefo llo wing noteson theto ngu e
we ight :
R Donotuse ato ngu ewe ight that exceed sor
fa lls belo wtheper missible tongu ewe ight
R Use ato ngu ewe ight asclos eas possible to
th emaximum tongu ewe ight
Do notex ceed thefo llo wing values:
R Perm issible towing capac ity
R Perm issible rear axle load oftheto wing vehi‐
cle
R Perm issible gross mass oftheto wing vehicle
R Perm issible gross mass ofthetra iler
R Maximum permissible speedofthetra iler
En sur eth efo llo wing beforest ar tin gajo ur ne y:
R The tirepr essur eon there ar axle oftheto w‐
ing vehicle issetfo ra maximu mloa d
R The lighting ofthecon nect edtrailer isoper a‐
tion al
In theeve ntofincr eased rear axle load, theve hi‐
cle/tra ilercombination mayno texc eed amaxi‐
mum speed of62 mph(1 00 km/h) forre ason s 27
0
Driving and parking

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

ASS
YSTPL US service interva ldisp lay Fu
nction oftheASS YSTPL US service interva l
displ ay The
ASSYSTPL US service interva ldispla yon the
Ins trument Displaypr ov ides informatio non the
re maini ngtime ordis tance before thene xt
ser vice duedate.
Yo ucan hide this ser vice displa yusing thebac k
butt ononthelef t-hand sideofthesteer ing
wheel.
Depen dingonhowtheve hicle isused, the
ASS YSTPL US service interva ldispla yma y
shor tenth eser vice interva l,e.g. inthefo llo wing
cases :
R Mainl yshor t-dis tance drivi ng
R Whe nth eengine isoftenleft idling forlong
per iods
R Intheeve ntoffreq uent col dstar tphase s
Mer cedes-Ben zre comme ndsavoiding such
oper ating condit ions.
Yo ucan obtain informat ionconcernin gth eser v‐
icing ofyour vehicle from aqu alif ied spec ialist wo
rkshop, e.g.anaut hor ized Mercedes-Benz
Cent er. Displa
yingtheser vice dueda te On-boar
dcom puter:
4 Service 5
ASS YST PLUS
The next ser vice duedateis displa yed. #
Toexitth edisp lay: press thebac kbutt on
on thelef t-hand sideofthesteer ing wheel.
Bear inmind thefo llo wing relat ed topic:
R Oper ating theon- board computer
(/ page27 6). Inf
ormatio non regular maintenance work *
NO
TEPrema turewe arthro ugh failur eto
obser veser vice duedates Ser
vice workwhic his no tcar ried out atthe
ri ght time orincom pletely can lead to
inc reased wearand damag eto theve hicle. #
Alw aysobser vethepr escr ibed service
int erva ls. #
Alw aysha ve thepr escr ibed service
wo rkcar ried out ataqu alif ied spec ialist
wo rkshop. Special
service requ irement s The
prescr ibed service interva lis based onnor ‐
mal opera tionoftheve hicle. Maintenance work
will needto be per form ed mor eof tenif th eve hi‐
cle isoper ated under arduous conditions or
incr eased loads.
The ASSYSTPL US service interva ldispla yis onl y
an aid. Thedriver oftheve hicle bearsre sponsi‐
bility asrega rdsto whe ther maint enanc ewo rk
nee dstobe per form ed mor eof tenth an spec i‐
fi ed based ontheactual operating conditions
and/or loads.
Ex am ples ofarduous operating conditions :
R regular citydriving withfreq uent intermedi‐
at estops
R mainly short-distance drivi ng Ma
intena nce and care32
1

R
freq uent operation inmount ainouste rrain or
on poor road sur faces
R whe nth eengine isoftenleft idling forlong
per iods
R oper ation inpar ticula rly dus tycond ition s
and /orif air -rec ircula tion mod eis freq uen tly
used
In these orsimilar operating conditions ,ha ve the
int erior airfilt er ,engin eair clean er,engin eoil
and oilfilt er etc. chang edmor efreq uent ly.The
tir es mus tbe checkedmor efreq uentl yif th e
ve hicle isoper ated under increased loads. Fur‐
th er information canbeobt ained ataqu alif ied
spec ialistwo rkshop. Batt
erydisconne ctionperiods The
ASSYSTPL US service interva ldisp lay
can onlycalculat eth eser vice dueda te when
th ebat tery isconnect ed. #
Notedown theser vice duedatedispla yedon
th eins trument displaybef orediscon necting
th ebatt ery(/ page32 1). Engine
compartment Opening/closing
thehood &
WARNIN GRisk ofacci dent dueto driv‐
ing withth ehood unlocked
The hood mayopen andblockyo ur vie w. #
Neverre lease thehood when driving. #
Beforeev erytrip, ensur eth at thehood
is loc ked. &
WARNIN GRisk ofacci dent andinjury
when openingand closingthehood
The hood maysuddenl ydr op intoth eend
position .
Ther eis arisk ofinjur yfo ran yone inthe
hood's rang eof mo vement. #
Open orclose thehood onlywhen ther e
is nobody inthehood's rang eof mo ve‐
ment. &
WARNIN GDang erofburnswhen open‐
ing thehood
If yo uopen thehood when theengine has
ove rheat edordur ing afire intheengine
com partmen t,yo uco uld come intoco ntact
wit hho tga ses orother escaping operating
fl uids. #
Beforeopen ingthehood, allowthe
engine tocool down. #
Intheeve ntofafire intheengine com‐
par tmen t,ke ep thehood closed and
call thefire ser vice. &
WARNIN GRisk ofinju rydue tomo ving
par ts
Com ponents intheengine compartmen tma y
con tinue running orstar tup sudden ly,ev en if
th eignition isswitc hedoff.
Mak esur eof thefo llo wing beforeper form ing
ta sk sin theengine compartmen t: #
Swi tchth eignition off. 322
Maintenanc eand care

#
Neverre ac hint oth edang erzon esur‐
ro und ingmovingco mp onent s,e.g. the
ro tatio nar ea ofthefa n. #
Remo vejewe leryand watche s. #
Keep items ofclo thing and hair away
fr om moving parts. &
WARNIN GRisk ofinju ryfrom touc hin g
co mp onent sunder voltag e
The ignit ionsystem and thefuel injec tion
sy stem workund erhigh voltag e. Youco uld
re cei vean elec tric shoc k. #
Neverto uc hco mp onent sof theignition
sy stem orthefuel injec tionsystem
when theignition isswitc hedon. &
WARNIN GRisk ofburnsfrom hotcom‐
ponent partsintheengine compartmen t
Cer tain com pone ntsin theengine compart‐
ment canbevery hot,e.g. theengine, the
ra diat orand partsof theex haus tsy stem. #
Allo wtheengine tocool down and only
to uc hco mp onent partsdescr ibedin
th efo llo wing. &
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. #
Alw aysswitc hof fth ewindshield wipers
and ignition beforeopening theengine
hood. Opens
thehood #
Torelease thehood, pullonhandle 1. Maint
enanc eand care323

#
Push handle 1ofthehood catchupw ards
and liftth ehood byappr oximat ely15 in
(40 cm).
Closing thehood
* NO
TEDama getothehood If
th ehood isclosed manually ,th er eis arisk
of dents. #
Donotclose thehood manuall y. #
Lowe rth ehood toaheigh tof aroun d8 in
(20 cm)and then allo witto fall, appl ying a
litt leforc eas youletit go. #
Ifth ehood canstill be lifte dslightl y,open
th ehood again and close itwit halittle more
fo rc euntil iteng ages cor rectl y. Engine
oil Chec
kingtheengine oilleve lusing theon-
boar dcom puter
Re quirement s:
R The engin ehas been warmed up.
R The vehicle ispar kedon aleve lsur face.
R The engineisrunning atidle spe ed.
The engineoille ve lis de term ined during drivin g.
De term inin gth eengine oilleve lcan take up to
30 minut eswit hanor mal driving style and even
long erwit han activ edr iving style. On-
boar dcom puter:
4 Service5
Engine OilLevel
Yo uwill see oneof thefo llo wing mess ages on
th emultifunc tiondispla y:
R Measuring Engine OilLevel.. .:measur ement
of theoil leve lis no tye tpo ssi ble. #
Repeat there qu estaf te ra maximu mof
30 minut es'driving.
R Engine OilLevel OKand thebar displa yfo r
indic atingth eoil leve lon themultifunc tion
displa yis green and isbe tween "min" and
"max": theoil leve lis cor rect.
R Engine OilLeve lAdd 1,1qts. andthebar dis‐
pla yfo rindica tingtheoil leve lon themulti‐
func tion displa yis orang eand isbelo w"min": #
Add1.1 US qt(1l)of engine oil.
R Red uce Engine OilLevel andthebar displa y
fo rindica tingtheoil leve lon themultifunc ‐
tion displa yis orang eand isabo ve"max ": 32
4
Main tenance andcare