2021 MERCEDES-BENZ GLS SUV warning

Low
Low
er
ering t
ing t he v
he vehicle
ehicle aTer
aTera wheel c
a wheel c hange
hange R R
eq eq uir
uir ements:
ements:
R The new wheel has been /t ted (/page 413).
Obser vethe information on tyre pressure
(/ page 401). #
Place thera tchet ring spanner onto the he xa-
gon nut of the jack so that the lettering "AB" is
visible. #
T
To low
o low er t
er the v
he v ehicle:
ehicle: turnthera tchet ring
spanner of the jack anti-clockwise. #
Tighten the wheel bolts evenly in a diagonal
pattern in the order indicated 1to5 with a
maximum of 80 Nm. #
Then tighten the wheel bolts evenly in a diago-
nal pattern in the order indicated 1to5 to
th e speci/ed tightening torque of 150 Nm. &
W
WARNING
ARNING Risk of inju rythro ugh incor rect
tightening torque
The wheels could come loose if the wheel
bolts or wheel nuts are not tightened tothe
prescribed tightening torque. #
Makesure the wheel bolts or wheel nuts
are tightened tothe prescribed tighten-
ing torque. #
Ifyo u are not sure, do not mo vetheve hi-
cle. Consult a quali/ed specialist work-
shop and ha vethe tightening torque
ch ecked immediatel y. #
Check the tyre pressure of the ne wlymounted
wheel and adjust according ly.%
The following does not apply if the new wheel
is an emer gency spa rewheel. #
V
Vehicles wit
ehicles wit h a tyr
h a tyre pr
e pr essur
essur e monit
e monit or
oring sy
ing sy s-
s-
t
t em:
em: restart the tyre pressure monitoring sys-
te m (/ page 404). Emerg
Emerg
ency spar
ency spar e wheel
e wheel N
No
ot
tes on t
es on t he emerg
he emerg ency spar
ency spar e wheel
e wheel &
W
WARNING
ARNING Risk of accident caused by
incor rect wheel and tyre dimensions
The wheel or tyre size and the tyre type of the
emer gency spa rewheel or spare wheel and
th e wheel tobe replaced may di.er. The emer-
ge ncy spa rewheel or spare wheel can signi/-
cantly impair driving characteristics of the
ve hicle.
To prev ent hazardous situations: #
Drive carefull y. #
Never /t more than one emer gency
spa rewheel or spare wheel that di.ers
in size. 414
414
Wheels and tyres

#
Pull /ller hose 1and plug 3out of the tyre
in0ation compressor housing. #
Insert plug 7of /ller hose 1inthe soc ket
on the tyre in0ation compressor and then turn
it until plug 7engages. #
Unscr ewthe cap from theva lve on the emer-
ge ncy spa rewheel. #
Screw union nut 2of /ller hose 1onto the
va lve. #
Make sure on and o. switch 4ofthe tyre
in0ation compressor is set to 00. #
Insert plug 3in a soc ket in your vehicle.
R Cigar ette lighter soc ket R
12 V soc ket: ( / page 152)
R Obser vethe no tes on the cigar ette lighter in
th e Digital Owner's Manual
R Obser vethe no tes on soc kets: (/ page 152) #
Press the start/s top button once toswitch on
th e po wer supply (/ page 190). #
Press on and o. switch 4onthe tyre in0a-
tion compressor to II.
The tyre in0a tion compressor is switched on.
The tyre is in0ated. The tyre pressure appears
on manom eter 5. #
Pump the tyre tothe speci/ed tyre pressure.
% The speci/ed tyre pressure is stated on the
label of the emer gency spa rewheel. #
When the speci/ed tyre pressure has been
re ached, press on and o. switch 4onthe
tyre in0ation compressor to 00.
The tyre in0a tion compressor is switched o.. #
Press the start/s top button toswitch o. the
po we r suppl y. #
Ifth e tyre pressure is higher than the speci/ed
pressure, press pressure release valve button 6
until the cor rect tyre pressure has been
re ached. #
Unscr ewunion nut 2of /ller hose 1from
th eva lve. #
Screw theva lve cap of the emer gency spa re
wheel onto theva lve again. #
Stow /ller hose 1and plug 3inthe lo wer
section of the tyre in0ation compressor hous-
ing. #
Stow the tyre in0ation compressor in theve hi-
cle. Collapsible spar
Collapsible spar
e wheel
e wheel N
No
ot
tes on t
es on t he collapsible spar
he collapsible spar e wheel
e wheel &
W
WARNING
ARNING Risk of accident caused by
incor rect wheel and tyre dimensions
The wheel or tyre size and the tyre type of the
emer gency spa rewheel or spare wheel and
th e wheel tobe replaced may di.er. The emer-
ge ncy spa rewheel or spare wheel can signi/-
cantly impair driving characteristics of the
ve hicle. 416
416
Wheels and tyres

To
prev ent hazardous situations: #
Drive carefull y. #
Never /t more than one emer gency
spa rewheel or spare wheel that di.ers
in size. #
Only use an emer gency spa rewheel or
spare wheel brie0y. #
Do not deacti vate ESP ®
. #
Have the emer gency spa rewheel or
spare wheel of a di.erent size replaced
at the nearest quali/ed specialist work-
shop. The new wheel must ha vethe cor-
re ct dimensions. The collapsible spare wheel is an emer
gency
spa rewheel which is only suitable for use for a
limited period of time and in a restric ted manner
in theev ent of a 0at tyre (e.g. until the nearest
wo rkshop).
The tyre side walls are folded when in transport
mode. Before use, the collapsible spare wheel has
to be in0a tedwith the accompanying compressor. Check
the tyre pressure of the collapsible spare
wheel once /t ted. Cor rect the pressure as neces-
sar y.
The maximum permissible speed with a collapsi-
ble spa rewheel /tted is 80 km/h.
Do not /t the collapsible spare wheel with snow
ch ains.
Re place the collapsible spare wheel aTer six years
at the latest, rega rdless of wear.
% V
V ehicles wit ehicles wit h a tyr
h a tyre pr
e pressur
essur e monit
e monit or
oring sy
ing sy s-
s-
t
t em:
em: if a collapsible spare wheel is /tted the
tyre pressure monitoring system cannot func-
tion reliabl y.Fo r a few minutes aTer an emer-
ge ncy spa rewheel is /tted, the system may
still display the tyre pressure of there mo ved
wheel. Only restart the system again when the
collapsible spare wheel has been replaced
with a new wheel.
Be sure toalso obser vethefo llowing fur ther rela-
te d subjects:
R Notes on tyre pressure (/ page 401)
R Tyre pressure table (/ page 402) N
No ot tes on v
es on v ehicles wit
ehicles wit h a Bur
h a Burmest
mester sound syst
er sound syst em
em &
W
WARNING
ARNING Risk of inju ryor death due to
an unsecured collapsible spare wheel
If th e collapsible spare wheel is not secured
cor rectl y,it can slip, tip over or be thro wn
around.
This can seriously injure vehicle occupants. #
Always store the collapsible spare wheel
in the emer gency spa rewheel bag and
attach it tothe brac ket in the load com-
partment. #
Always ensu rethat the lashing straps on
th e emer gency spa rewheel bag are
safely secured on there ar tie-down eyes
on the load compartment 0oor. Depending on
theve hicle's equipment, the col-
lapsible spare wheel is located in an emer gency
spa rewheel bag on a brac ket in the load compart-
ment. The collapsible spare wheel in the emer-
ge ncy spa rewheel bag and the brac ket are lashed
with straps and secured using there ar tie-down
ey es on the load compartment 0oor. Wheels and tyres
417 417

N
N
o
ot
tes on t
es on t ec
echnical data
hnical data
* NO
NOTE
TEMercedes-AMG vehicles #
Obser vethe no tes in the Supplement.
Yo u could otherwise failto recognise
dangers. The
tech nical data was de term ined in accordance
with EU Directives. The data stated only applies to
ve hicles with standard equipment. You can obtain
fur ther information from a Mercedes-Benz Service
Centre.
Onl Onl y f
y for cert
or cert ain countr
ain countr ies:
ies:you can /n dvehicle-
speci/c vehicle data in theCO C documents (CER-
TIFIC ATE OF CONFORMITY). These documents
are deli vered with your vehicle. On-boar
On-boar
d electr
d electronics
onics N
No
ot
tes on t
es on t am
amper
per ing wit
ing wit h t
h the engine electr
he engine electr onics
onics *
N
NOOTE
TE Prematu rewe arthro ugh improper
maintenance Improper maintenance may cause
vehicle
components towe ar more quickly and the
ve hicle's operating permit may be in validated. #
Always ha veworkon the engine elec-
tronics and related components car ried
out at a quali/ed specialist workshop. T
T
w
w o-wa
o-wa y r
y radios
adios N
No
ot
tes on
es on /tting
/tting tw
two-wa
o-wa y r
y radios
adios &
W
WARNING
ARNING Risk of accident due to
improper workon two-w ayradios
If two-w ayradios are manipulated or retro/t-
ted incor rectl y,the electromagnetic radiation
from the two-w ayradios can inter fere with the
ve hicle elect ronics and jeopardise the operat-
ing saf ety of theve hicle. #
You should ha veall workon electrical
and electronic components car ried out
at a quali/ed specialist workshop. &
W
WARNING
ARNING Risk of accident due to
improper operation of two-w ayradios
If yo u use two-w ayradios in theve hicle
improper ly,th eir electromagnetic radiation
can disrupt theve hicle's elect ronics. This is
th e case in thefo llowing situations, in particu-
lar:
R The two-w ayradio is not connected toan
ex terior aerial.
R The exterior aerial is /tted incor rectly or is
not a lo w-re0ection aerial.
This could jeopardise the operating saf ety of
th eve hicle. #
Have the lo w-re0ection exterior aerial /t-
ted at a quali/ed specialist workshop. #
When operating two-w ayradios in the
ve hicle, alw ays connect them tothe lo w-
re 0ection exterior aerial. 420
420
Te
ch nical data

Oper
Oper
ating
ating 0uids
0uids N
No
ot
tes on oper
es on oper ating
ating0uids
0uids *
N
NOOTE
TE Mercedes-AMG vehicles #
Obser vethe no tes in the Supplement.
Yo u could otherwise failto recognise
dangers. &
W
W ARNING
ARNING Risk of injury from operating
0uids harmful toyour health
Operating 0uids may be poisonous and harm-
ful toyour health. #
Obser vethete xt on the original contain-
ers when using, storing or disposing of
operating 0uids. #
Always store operating 0uids sealed in
th eir original containers. #
Alwayske ep children away from operat-
ing 0uids. +
ENVIR
ENVIR
ONMENT
ONMENT AL NO
AL NOTE
TEPollution of the
environment due toirre sponsible disposal
of operating 0uids Incor
rect disposal of operating 0uids can
cause considerable damage tothe environ-
ment. #
Dispose of operating 0uids in an environ-
mentally responsible manner. Operating 0uids include
thefo llowing:
R fuels
R DeNOx agent AdBlue ®
forex haust gas aTer-
treatment
R lubricants
R coolant
R brake 0uid
R windscreen washer 0uid
R climate cont rol system refrigerant
Only use products appro vedby Mercedes-Benz.
Damage caused bythe use of products that ha ve
not been app rove d is not co veredby the
Mercedes-Benz warranty or goodwill gestu res. The operating 0uids appr
ovedby Mercedes-Benz
can be identi/ed bythefo llowing inscriptions on
th e container:
R MB-F reigabe (e.g. MB-F reigabe 229.51)
R MB-Appr oval (e.g. MB -Appr oval 229.51)
Fu rther information on appr oved operating 0uids:
R inthe Mercedes-Benz Speci/cations for Oper-
ating Fluids byentering the designation
- at https://be vo.mercedes-benz.com
- inthe Mercedes-Benz BeVo App
R Ataqu ali/ed specialist workshop &
W WARNING
ARNING Risk of /re or explosion from
fuel
Fu els are highly 0ammable. #
Fire , naked 0ames, smoking and creating
spar ksmust be avoided. #
Before and during refuelling, switch o.
th eve hicle and, if /tted, the stationary
heater. Te
ch nical data
425
425

Engine oil
Engine oil
/lling
/llingcapacity
capacity Model
Model
Capacity
Capacity
GLS 580 4MATIC 9.5 litres
All other model s8 .5 litresEngine oil capacity (Mer
Engine oil capacity (Mercedes-Ma
cedes-Maybac
ybach)
h) Model
Model
Capacity
Capacity
Mercedes-Maybach
GLS 480
Mercedes-M aybach
GLS 600 4MATIC 9.5 litresN No
ot
t es on br
es on br ak
ake
e0uid
0uid No
tethe inst ructions about operating 0uids
(/ page 425). &
W
WARNING
ARNING Risk of an accident due to
va pour poc kets form ing in the brake sys-
tem
The brake 0uid constantly absorbs moisture
from the air. This lo wersthe boiling point of
th e brake 0uid. If the boiling point is too lo w,
va pour poc kets may form inthe brake system
when the brakes are applied hard.
This impairs the braking e.ect. #
Have the brake 0uid rene we d at the
speci/ed inter vals. Ha
ve the brake 0uid regula rly re placed at a quali-
/ed specialist workshop.
Only use a brake 0uid appr ovedby Mercedes-
Benz according toMB-F reigabe or MB-Appr oval
331.0. Coolant Coolant
N
No
ot
tes on coolant
es on coolant
Obser vethe no tes on operating 0uids
(/ page 425). &
W
WARNING
ARNING Risk of /re‑ and injury from
antif reeze
If antifreeze comes into contact with hot com-
ponent parts in the engine compartment, it
may ignite. #
Allow the engine tocool down before
yo uto p up the antifreeze. #
Make sure that no antif reeze spills out
next tothe /ller opening. #
Thoroughly clean the antifreeze from
component parts before starting the
ve hicle. *
N
NOOTE
TE Damage caused byincor rect cool-
ant #
Only use coolant that has been premixed
with there qu ired antifreeze pr otection.
Information on coolant is available at thefo l-
lowing locations:
R Inthe Mercedes-Benz Speci/cation for
Operating Fluids 320.1 432 432
Te
ch nical data

Displa
Displa
y messag
y messag es
es Intr
Intr
oduction
oduction Inf
Inf
or
ormation about displa
mation about displa y messag
y messages
es
Display messages appear on the inst rument dis-
pla y.
Display messages with graphic symbols are sim-
pli/ed in the Owner's Manual and may di.er from
th e symbols on the inst rument displa y.The instru-
ment display sh ows high-priority display messages
in red. Cer tain display message s are accompa-
nied byawa rning tone.
Please act in accordance with the display mes-
sages and follow the additional no tes in the Own-
er's Manual.
Fo r some display messages, symbols will also be
shown:
R Õ Further information
R ¨ Hide displ aymessage
Wi th th e leT-hand Touch Control, you can select
th ere specti vesymbol byswiping tothe leT or
ri ght. Pressing Õdispla ysfur ther information on th
e media displa y.Press the¨ symbol tohide
th e display message.
Yo u can hide lo w-priority display messages by
pressing the back button Porthe leT-hand
To uch Control. The display message s willthen be
stored in the message memor y.
Re ctify the cause of a display message as quickly
as possible.
High-priority display message s cannotbe hidden.
The instrument display will show these display
messages permanently until the cause of the dis-
play message has been recti/ed.
Calling up sav
Calling up sav ed displa ed display messag
y messag es
es
On-board computer:
4 Service 5
1 message
If th ere are no display messages, No messages
will appear on the inst rument displa y. #
Scroll thro ugh the display messages byswip-
ing upwards or down wards on the leT-hand
To uch Control. #
T
T o e
o e xit t
xit t he messag
he messag e memory
e memory:
:press the back
button P. 442
442
Display messages and
warning/indicator lamps

Occupant safe
Occupant safe
ty
ty Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/conseq uences and
uences andM
MSolutions
Solutions
6
Restraint sys. malfunction
Consult workshop *T
herestraint system is malfunctioning (/ page 43). &
W WARNING
ARNING Risk of injury due tomalfunctions in there straint system
Co mp onents in there straint system ma y be activated unintentionally or not deploy as intended in an accident. #
Have there straint system checked and repaired immediately at a quali/ed specialist workshop. 6
Front left malfunction Con-
sult workshop (examp le) *T
he cor responding restraint system is malfunctioning (/ page 43). &
W WARNING
ARNING Risk of injury due tomalfunctions in there straint system
Co mp onents in there straint system ma y be activated unintentionally or not deploy as intended in an accident. #
Have there straint system checked and repaired immediately at a quali/ed specialist workshop. 6
Left windowbag malfunc-
tion Consult work-
shop (examp le) *T
he cor responding restraint system is malfunctioning (/ page 43). &
W WARNING
ARNING Risk of injury or fata l injury due toa malfunction in the windowbag
The windowbag might be triggered unintentionally or might not be triggered at all in theev ent of an accident. #
Have the windowbag checked and repaired immediately at a quali/ed specialist workshop. Displ
aymessages and warning/indicator lamps
443
443