2021 MERCEDES-BENZ GLS SUV ECU

#
Remo vewarning triangle 1.
Se
Se tting up t
tting up t he w
he war
arning tr
ning tr iangle
iangle #
Fold side re0ectors 1upwards toform a tri-
angle and attach at theto p using upper press-
stud 2. #
Fold legs 3down and out tothe side. F
F
irs
irst-aid kit t-aid kit (soT-sided)
(soT-sided) ov
over
erview
view In
the as-delivered state, the /r st-aid kit (soT
sided) is in the load compartment on theright-
hand side behind service 0ap 1. R
R
emo
emo ving t
ving t he
he /re
/re e
extinguisher
xtinguisher &
W
WARNI NG
ARNI NGRisk of accident due toan
inco rrectly secured /re extinguisher in the
driver's foot we ll
A /re extinguisher may impede pedal tr avel or
block a depressed pedal. This jeopardises
the operating and road saf ety
of theve hicle.
The /re extinguisher can be 0ung around and
injure the driver or other vehicle occupants. #
Always store and secure the /re extin-
guisher in the brac ket. #
Do not remo vethe /re extinguisher while
driving. #
LeT-hand
LeT-hand dr
driv
ive v
e v ehicle:
ehicle: pulltab1 upwards. #
Right-hand dr
Right-hand dr iv
ive v
e v ehicle:
ehicle: pulltab1 down-
wa rds. #
Remo ve/re extinguisher 2. Breakdown assistance
381
381

At
a dis tance of app roximately 1 m tothe tyre
in0ation compressor and appr oximately 1.6 m
abo vethegr ound, thefo llowing sound pres-
sure le vels appl y:
R Emission sound pressure le vel L
PA
84 dB(A)
R Sound po wer le vel L
WA 92 dB (A)
The tyre in0ation compressor is maintenance-
free. If there is a malfunction, please contact
a qu ali/ed specialist workshop. Using t
Using t
he TIREFIT kit
he TIREFIT kit R
R
eq
eq uir
uir ements:
ements:
R Tyre sealant bottle and tyre in0ation compres-
sor (/ page 383)
R TIREFIT stic ker
R Gloves
Yo u can use TIREFIT tyre sealant toseal per fora-
tion damage of up to4 mm, particular lythose in
th e tyre contact sur face. You can use TIREFIT in
outside temp eratures down to-20 °C. &
W
WARNING
ARNING Risk of accident when using
tyre sealant
The tyre sealant may be unable toseal the
tyre proper ly, especially in thefo llowing cases:
R there are lar gecuts or punctures in the
tyre (la rger than damage pr eviously men-
tioned)
R the wheel rims ha vebeen damaged
R aTer journe yswith very low tyre pressure
or with 0at tyres #
Do not continue driving. #
Consult a quali/ed specialist workshop. &
W
WARNING
ARNING Risk of injury and poisoning
from tyre sealant
Ty re sealant is hazardous tohealth and causes
ir rita tion. Do not allow it tocome into contact
with your skin, eyes or clo thing, and do not
swallow it. Do not inhale any vapours. Keep
th e tyre sealant away from children. Obser
vethefo llowing if you come into contact
with the tyre sealant: #
Rinse o. the tyre sealant from your skin
using water immediatel y. #
If tyre sealant gets into your eyes, thor-
oughly rinse them using clean water
immediatel y. #
If tyre sealant has been swallo wed,thor-
oughly rinse out your mouth immediately
and drink plenty of water. Do not induce
vo miting and seek medical attention
immediatel y. #
Change out of clo thing which has come
into contact with tyre sealant immedi-
atel y. #
If an alle rgic reaction occurs, seek medi-
cal attention immediatel y. *
N NO
OTE
TE Overheating due tothe tyre in0ation
compressor running too long #
Do not runth e tyre in0ation compressor
fo r longer than ten minutes without inter-
ru ption. 384 384
Breakdown assistance

R
Always make sure that nei ther you nor the bat-
te ry is electrostatically charge d.
R Keep awa y from /re and naked 0ames.
R Do not lean overth e batter y.
Obser vethe additional following points when
ch arging the batter y:
R Only use battery charge rs tested and
appro vedfo r Mercedes-Benz.
R Read the battery charge r's operating inst ruc-
tions before charging the batter y.
Obser vethe additional following points during
starting assistance:
R Starting assis tance may only be pr ovided
using vehicles, batteries or other jump start
devices with a nominal voltage of 12 V.
R The vehicles must not touch.
R V
Vehicles wit
ehicles wit h a pe
h a pe tr
trol engine:
ol engine: jump-start the
ve hicle only when the engine and exhaust sys-
te m are cold. S
S
t
tar
ar ting assist
ting assist ance and c
ance and c har
harging t
ging t he 12 V batt
he 12 V batt ery
ery R R
eq eq uir
uir ements:
ements:
R The vehicle is secured with the electric par k-
ing brake.
R V
Vehicles wit
ehicles wit h aut
h automatic tr
omatic tr ansmission:
ansmission: the
transmission is in position j.
R The vehicle and all elect rical consume rsare
switched o..
R The bonnet is open. Example: engine compartment
#
Slide co ver1 of POSITIVE contact 2onthe
jump-starting connection point in the direction
of the ar row. #
Connect POSITIVE contact 2onyour vehicle
to the positive term inal of the donor battery
using the jump lead/charging cable. Alw ays Breakd
own assistance
391
391

#
Deactivate tow- awa y protection
(/ page 107). #
Deactivate Active Brake Assist (/ page 258).#
ShiT the transmission toposition i
(/ page 210). #
Release the electric parking brake. &
W
WARNING
ARNING Risk of accident due tolimited
saf ety-re lated functions during theto wing
process
Saf ety-re lated functions are limited or no lon-
ge rav ailable in thefo llowing situations:
R theve hicle is switched o..
R the brake system or po wer steering system
is malfunctioning.
R the energy supply or the on-board electri-
cal system is malfunctioning.
When your vehicle is towe daw ay, signi/cantly
more e.ort may be requ ired tosteer and
brake than is normally requ ired. #
Use a tow bar. #
Make sure that the steering wheel can
mo vefreely be fore towing theve hicle
awa y. *
N
NO
OTE
TE Damage due toexcessive tractive
po wer If
yo u pull away sharpl y,the tractive po wer
may be too high and theve hicles could be
damaged. #
Pull away slo wlyand smoo thly. Loading t
Loading t
he v
he vehicle f
ehicle f or tr
or transport
anspo rt #
Obser vethe no tes on towing away
( / page 394). #
Connect theto wing device totheto wing eye
in order toload theve hicle.
% You can also attach theto w bar tothe trailer
hitch. #
ShiT the automatic transmission toposition
i. %
The automatic transmission may be loc ked in
position jintheev ent of damage tothe
electrics. ToshiT toi , pr ovide the on-board
electrical system with po wer (/ page 391). #
Load theve hicle onto the transpor ter. #
ShiT the automatic transmission toposition
j. #
Use the electric parking brake tosecure the
ve hicle against rolling away. #
Only secure theve hicle bythe wheels.
V
V ehicles wit
ehicles wit h ADS PL
h ADS PLUS (A
US (Adap
daptiv
tive Dam
e Dam ping Sy
ping Sy s-
s-
t
t em PL
em PL US)
US) &
W
WARNING
ARNING Risk of an accident when trans-
porting vehicles with Adaptive Damping
System PLUS
When transpo rting vehicles with Adaptive
Damping System PLUS, theve hicle/trailer
combination may begin torock and start to
skid. #
Load theve hicle cor rectly onto the
transpor ter. Breakd
own assistance
395
395

#
Secure theve hicle on all four wheels
with suitable tensioning straps. #
Do not exceed the maximum permissible
speed of 60 km/h when transporting. *
N
NOOTE
TE Damage totheve hicle from secur-
ing it inco rrectly #
ATer loading, theve hicle must be
secured on all four wheels. Otherwise,
th eve hicle could be damaged. #
A minimum dis tance of 20 cm upwards
and 10 cm down wards must be kept to
th e transport platform. #
Secure theve hicle on all four wheels aTer
loading. 4MA
4MA
TIC v
TIC v ehicles/v
ehicles/v ehicles wit
ehicles wit h aut
h automatic tr
omatic tr ans-
ans-
mission
mission #
Make sure that the front and rear axles come
to rest on the same transpor tation vehicle.
* N
NOOTE
TE Damage tothe drive train due to
incor rect positioning of theve hicle #
Do not position theve hicle abo vethe
connection point of the transport vehi-
cle. T
T
o
o wing ey
wing eye st
e st or
orag
ag e location
e location Example:
towing eye
To wing eye1 is located under the load compart-
ment 0oor. 396
396
Breakdown assistance

*
N
NO
OTE
TE Damage due toincor rect fuses Electrical components or systems may be
damaged byincor rect fuses, or their function-
ality may be signi/cantly impaired. #
Only use fuses that ha vebeen appr oved
by Mercedes-Benz and which ha vethe
cor rect fuse rating. Blown fuses must be
replaced with fuses of the
same rating, whi chyou can recognise bythe col-
our and the label. The fuse ratings and fur ther
information tobe obser ved can be found in the
fuse assignment dia gram.
F
F use assignment diagr
use assignment diagr am:
am:onthe fuse box in the
load compartment (/ page 399).
* NO
NOTE
TEDamage or malfunctions caused by
moisture Moisture may cause damage
tothe electrical
system or cause it tomalfunction. #
When the fuse box is open, make sure
th at no moisture can enter the fuse box. #
When closing the fuse box, make sure
th at the seal of the lid is positioned cor-
re ctly on the fuse box. If
th e ne wlyinser ted fuse also blo ws, ha vethe
cause traced and recti/ed at a quali/ed specialist
wo rkshop.
Ensure thefo llowing before replacing a fuse:
R The vehicle is secured against rolling away.
R All electrical consume rsare switched o..
R The vehicle is switched o..
The elect rical fuses are located in various fuse
bo xes:
R Fuse box in the engine compartment on the
leT-hand side of theve hicle, when vie wed in
th e direction of tr avel (/ page 398)
R Fuse box on the driver's side of the cockpit
(/ page 399)
R Fuse box in the front passenger foot we ll
(/ page 399) R
Fuse box in the load compartment on the
ri ght-hand side of theve hicle, when vie wed in
th e direction of tr avel (/ page 399) Opening and closing t
Opening and closing t
he fuse bo
he fuse box in t
x in t he engine
he engine
com
com par
par tment
tment R
R
eq
eq uir
uir ement
ement: :
R You need a dry clo thand a scr ewdriver.
Obser vethe no tes on elect rical fuses
(/ page 397).
Opening
Opening &
W
WARNING
ARNING Risk of injury from using the
windscreen wipers when the bonnet is
open
If th e windscreen wipers start moving when
th e bonnet is open, you could be trapped by
th e wiper linkage. #
Always switch o. the windscreen wipers
and vehicle before opening the engine
bonnet. 398
398
Breakdown assistance

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

R
R
emo
emo ving t
ving t he collapsible spar
he collapsible spar e wheel
e wheelV V
ehicles wit ehicles wit hout a Bur
hout a Burmest
mester sound syst
er sound syst em
em
The collapsible spare wheel is located under the
load compartment 0oor. #
Obser vethe information on mounting tyres
(/ page 404). #
Open theta ilgate. #
Open the load compartment 0oor. #
Remo vethe collapsible spare wheel.
V
V ehicles wit
ehicles wit h a Bur
h a Burmest
mester sound syst
er sound syst em
em
The collapsible spare wheel is secured in the col-
lapsible spare wheel bag in the load compart-
ment. #
Obser vethe information on mounting tyres
(/ page 404). #
Open the load compartment. #
Loosen the lashing straps. #
Unhook thereta ining spring hooks of the lash-
ing straps from the brac kets. #
Remo vethe collapsible spare wheel bag
to get her with the collapsible spare wheel. #
Open the collapsible spare wheel bag and
re mo vethe collapsible spare wheel.
Mer
Mer cedes‑Ma
cedes‑Ma ybac
ybach v
h vehicles
ehicles
W
W it
ithout r
hout r efr
efrig
iger
er at
ator bo
or bo x:
x:the collapsible spare
wheel is located in the collapsible spare wheel
bag on the load compartment 0oor. #
Obser vethe information on mounting tyres
(/ page 404). #
Open the load compartment. #
Loosen the lashing straps. #
Unhook thereta ining spring hooks of the lash-
ing straps from the brac kets. #
Remo vethe collapsible spare wheel bag
to get her with the collapsible spare wheel. #
Open the collapsible spare wheel bag and
re mo vethe collapsible spare wheel.
W
W it
ith r
h r efr
efr ig
iger
er at
ator bo
or bo x:
x:the collapsible spare wheel
is located in the collapsible spare wheel bag
inside the open load compartment 0oor. #
Obser vethe information on mounting tyres
(/ page 404). #
Open the load compartment. #
Loosen the lashing straps. #
Unhook thereta ining spring hooks of the lash-
ing straps from the brac kets. #
Remo vethe collapsible spare wheel bag
to get her with the collapsible spare wheel. #
Open the collapsible spare wheel bag and
re mo vethe collapsible spare wheel. In0ating In0ating
t the collapsible spar
he collapsible spar e wheel
e wheel R
R
eq
eq uir
uir ements:
ements:
R Mount the collapsible spare wheel as descri-
bed (/ page 413).
R Remo vethe tyre in0ation compressor from the
st ow age space under the luggage compart-
ment 0oor (/ page 383).
* NO
NO TE
TEDamage tothe collapsible spare
wheel when lo wering theve hicle Lo
we ring theve hicle without pr eviously in0at-
ing the collapsible spare wheel can damage its
ri m. 418
418
Wheels and tyres