2021 MERCEDES-BENZ GLS SUV ignition

If
yo u ha veacciden tally refuelled wi th the
wrong fuel: #
do not switch on the ignition. #
consult a quali/ed specialist workshop. The
following compatibility indications for fuel
apply toyour vehicle: 1
For petrol with maximum 5% ethanol byvol-
ume
2 For petrol with maximum 10% ethanol byvol-
ume Ac
cording toEuropean standard EN 16942 you
can /nd the compatibility indications at thefo l-
lowing locations:
R onthe inst ruction label on the fuel /ller 0ap
R onthe fuel pump or pump nozzle suitable for
yo ur vehicle throughout Europe
If th eav ailable fuel is not su1ciently low in sul-
phur, this can produce unpleasant odours.
The recommended octane number foryo ur vehi-
cle can also be found on the inst ruction label in
th e fuel /ller 0ap (/ page 216).
As a temp orary measure, if there commended fuel
is not available, you may also use regular unlea-
ded petrol with at least 91 RON.This may reduce
engine output and increase fuel consumption.
Ne verre fuel using petrol wi than even lo werRO N.
Fu rther information on fuel can be obtained at a
/lling station or a quali/ed specialist workshop.
Inf
Inf or ormation on additiv
mation on additiv es in pe
es in petr
trol (v
ol (v ehicles with
ehicles with
pe
pe tr
trol engine)
ol engine)
No tethe inst ructions about operating 0uids
(/ page 425). *
N
NO OTE
TE Damage from use of unsui table
additives Even small amounts of
the wrong additive may
lead tomalfunctions occur ring. #
Only add cleaning additives recommen-
ded byMercedes-Benz tothe fuel. Mercedes-Benz
recommends that you use brand-
name fuels with additives.
In some countries, the fuel available may not ha ve
su1cient additives. Deposits could build up in the
fuel injection system as a result. In this case, in
consultation with a Mercedes-Benz service
centre, mix the fuel with the cleaning additive rec-
ommended byMercedes-Benz. Obser vethe no tes
and mixing ratios indica ted on theta nk.
Inf
Inf or ormation on fuel q
mation on fuel q uality f
uality for v
or vehicles wit
ehicles wit h a die-
h a die-
sel engine
sel engine
Gener Gener al not
al notes
es
No tethe inst ructions about operating 0uids
(/ page 425). Te
ch nical data
427
427

V
V
ehicle
ehicle Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/conseq uences and
uences andM
MSolutions
Solutions
Update successfully com-
pleted *I
nstallation of the soTware update has been successfully comple ted (/ page 324).
Update failed Software
remains unchanged *A
n er ror occur red during ins tallation of the soTware update (/ page 324).
The pr evious soTware release remains in place.
Update failed *An er ror occur red during ins tallation of the soTware update (/ page 324).
Make a Mercedes me call via theove rhead control panel (/ page 340).
d
Vehicle is operational
Switch off ignition before
exiting *Y
ou are leaving theve hicle in a ready-to-drive state. #
Get out of theve hicle, secure it against rolling away and take theke y with you. #
Ifyo u do not lea vetheve hicle, switch o. the electrical consumers, e.g. the seat heating. Otherwise, the 12‑V bat-
te ry may dischar geand starting the engine may be possible only with the help of a second battery (jump start).
ï
Operation only possible in
transmission position P *T
he ball neck will not swivel because transmission position h,kor neutral iis selected. #
Depress the brake pedal. #
Engage park position j.452 452
Display messages and
warning/indicator lamps

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions #
Check the conditions for automatic release of the electric parking brake. #
Release the electric parking brake manuall y.
!
Turn on the ignition to
release the parking brake *T
hered! indicator lamp is lit.
Yo u ha veattem pted torelease the electric parking brake with theve hicle switched o.. #
Switch on theve hicle.
J Check brake fluid level *T
here is insu1cient brake 0uid in the brake 0uid reser voir. &
W WARNING
ARNING Risk of an accident due tolow brake 0uid le vel
If th e brake 0uid le vel is too lo w,the braking e.ect and the braking characteristics may be impaired. #
Stop theve hicle as soon as possible, paying attention toroad and tra1c conditions. Do not continue driving. #
Consult a quali/ed specialist workshop. #
Do not top up the brake 0uid. Check brake pads See
Owner's Manual
*T
he brakepads ha vereached thewe ar limit. #
Consult a quali/ed specialist workshop. 470 470
Displ
aymessages and warning/indicator lamps

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
Ø
XX,X l Top up AdBlue
Switch on ignition, wait 60
sec. or eng. start not poss. *
The AdBlue ®
tank is em pty. Yo u can no longer start theve hicle. #
Add at least the amount of AdBlue ®
displa yed (/ page 220). #
Switch on theve hicle and waitfor appr oximately 60 seconds. #
Start theve hicle.
¯
AdBlue system fault See
Owner's Manual *
The AdBlue ®
system is malfunctioning. #
Consult a quali/ed speciali stwo rkshop immediatel y.
¯
AdBlue system fault Emer-
gency op. in XXX miles See
Owner's Manual *
The AdBlue ®
system is malfunctioning. Performance will be reduced once there maining distance displa yed has been
co vered. #
Consult a quali/ed specialist workshop immediatel y.500 500
Display message
s andwarning/indicator lamps

ç
O................................................ .473
ë O.................................................4 71
ï Operation only possible in
transmission position P .......................... 452
! Parking brake See Owner's
Manual..................................................4 67
Á Please reduce speed .................... .486
Ý Please wait 48 V battery charg-
ing......................................................... 494
h Rectify tyre pressure ..................... 497
Ø Re/ll AdBlue See Owner ’sMan-
ual ......................................................... 499
! Release parking brake ...................469
¸ Replace air cleaner ....................... 463
Á Replace key.................................. 446
8 Reser vefuel le vel.......................... 463
6 Restraint sys. malfunction Con-
sult workshop ....................................... .443
# See Owner's Manual..................... 492
y Siderunning boa rdnot extended ... 455 Ù
Steering malfunction Increased
ph ysical e.ort See Owner's Manual....... 456
Ù Steering malfunction Stop
immediately See Owner's Manual ........... 456
# Stop vehicle Lea veengine run-
ning ....................................................... 494
# Stop vehicle See Owner's Man-
ual......................................................... 493
ç suspended .................................... 473
: Switch o. lights............................ 449
: Switch on headlamps .................... 449
á temp orarily una vailable Camera
view restric ted....................................... 482
¸ temp orarily una vailable Sensors
dirty....................................................... 481
Ø Top up AdBlue Emer gency op. in
XXX miles See Owner's Manual.............. 499
+ Top up coolant See Owner ’s
Manual.................................................. 461
¥ Top up washer 0uid...................... .460 ï
Trailer coupling extending…........... 453
! Turn on the ignition torelease
th e parking brake ................................... 470
d Vehicle is operational Switch o.
ignition before exiting............................. 452
Á Vehicle rising Please wait.............. 485
Á Vehicle rising ................................ 485
h Warning tyre defect....................... 497
h Wheel sensor(s) missing ................ 496
Ø XX,X l Top up AdBlue Swit chon
ignition, wait 60 sec. or eng. start not
poss...................................................... 500
Ac tive Blind Spot Assist cur rently
una vailable See Owner's Manual ............ 479
Ac tive Blind Spot Assist inoperative........ 479
Ac tive Blind Spot Assist not available
when towing a trailer See Owner's
Manual................................................. .480
Ac tive Brake Assist Functions cur-
re ntly limi ted See Owner's Manual .........490 528 528
Index

HANDS-FREE A
HANDS-FREE A
CCESS
CCESS................................... 93
Handset
Handset Stow age compartmen t.......................... .140
Hazar
Hazar d w
d war
arning lights
ning lights................................... 162
Head r
Head r es
estrtraint
aint
At tach ing/removing the supplemen-
ta ry cushion.......................................... .122
EASY ADJUST luxury head restraint
(f ro nt).................................................... 120
Fr ont (adjusting mechanically)................ 118
Fr ont (luxury head restraint)................... 119
Re ar (adjusting)..................................... .120
Re ar (luxury head restraint).................... 121
Re ar (removing//tting)........................... 121
Head-up displ ay
Head-up display
Adjusting brightness (on-board com-
puter).................................................... 313
Ad justing display elements (on-board
co mp uter).............................................. 313
Care...................................................... 378
Fu nction................................................ 312
Menu (on-boa rdcomputer)..................... 313
Operating the memory function.............. 131 Setting
the position (on-board com-
puter).................................................... 313
Switching on/o.....................................3 14
Headlam
Headlam p p0ashing
0ashing ........................................ 162
Headlam
Headlam ps
ps
see Automatic driving lights
Heating
Heating see Climate control
Help call
Help call see Mercedes-Benz emer gency call system
High beam
High beam Activating/deactivating.......................... 162
High beam
High beam see Adaptive Highbeam Assist Plus
HIGH RAN
HIGH RAN GE
GE
ShiTing.................................................. 214
High-pr
High-pr essur
essure cleaner (car
e cleaner (car e)
e)........................ 374
Hill St
Hill Star
art Assist
t Assist............................................ 236
HOLD function
HOLD function Function/no tes...................................... 235
Switching on/o..................................... 235 Home scr
Home scr
een (media displa
een (media displa y)
y)
Overview................................................ 316 I
I
i-Size c
i-Size c hild seat secur
hild seat secur ing syst
ing system
em
Fi tting...................................................... 66
Seats suitable for attaching...................... 66
Identi/cation
Identi/cation plate
plate
Engine................................................... 423
Ve hicle.................................................. 423
Ignition key
Ignition key
see Key
Immobiliser
Immobiliser .................................................. 105
Im
Im plied w
plied w arr
arranty
anty
Ve hicle..................................................... 38
Im
Im port
port er addr
er addr esses
esses
Wi reless components...............................33
In-Car
In-Car O1ce
O1ce
Fe atures................................................ 346
Indicat
Indicat or lamp
or lamp
see Warning/indicator lamp
Individual dr
Individual dr iv
iv e pr
e pr ogr
ogram
am
Con/guring............................................ 207 Index
535
535

T
T
ec
ec hnical data
hnical data
Axle load (trailer operation).................... 441
Component-speci/c information............ 422
Fa stening points (t railer hitch)................ 439
Information............................................4 20
Mounting dimensions (trailer hitch)........4 39
No tes (trailer hitch)................................ 438
Overhang dimension (trailer hitch)......... .439
Re gula tory radio identi/cation (Indo-
nesia).................................................... 422
Re gula tory radio identi/cation of
small component s.................................. 422
To ngue weight........................................ 440
To wing capacity (trailer operation ).......... 439
T
T elephone elephone
Connecting a mobile phone (Passke y).... 340
Connecting a mobile phone (Secure
Si mp lePa iring)....................................... 340
Fu nctions in thete lephone menu............ 340
No tes..................................................... 337
No tes on wireless charging (mobile
phone)................................................... 155
Operating modes................................... 339
Te lephone menu overview......................3 39Wi
reless charging (mobile phone in
th ere ar)................................................ 157
Wi reless charging (mobile phone)........... 157
T
T elephon elephon y oper
y operating modes
ating modes
Blu etoo th®
telephony............................. 339
Car telephon y........................................ 339
T
T em
em per
per ature
ature
Setting theve hicle interior temp era-
ture....................................................... 178
Themes
Themes Fastening.............................................. .323
Thir
Thir dro
d ro w of seats
w of seats
Fo lding back the backrest on theth ird
ro w of seats.......................................... .143
Fo lding the backrest on theth ird row
of seats forw ards................................... 143
Getting in/out........................................ 115
Thr
Thr ough-loading f
ough-loading f eature
eature
see Seat
see Third row of seats
T T ie-do
ie-do wney
wn eyes
es.............................................. 147
TIREFIT kit
TIREFIT kit Declaration of conformity......................... 34 St
orage location.................................... .383
Using..................................................... 384
T
T o switc
o switc h on t
h on t he ignition
he ignition
see Vehicle
T
T oll syst
oll syst em
em
Wi ndsc reen............................................ 176
T
T ongue w
ongue w eight
eight.............................................. 440
T
T ool
ool
see Vehicle tool kit
T
T op Tet
op Tether
her...................................................... 70
T
T opping up
opping up
Topping up AdBlue ®
.............................. .220
T
T ouc
ouc h Contr
h Contr ol
ol
On-board computer................................ 310
Operating.............................................. 317
T
T ouc
ouc hpad
hpad
Operating.............................................. 317
T T ouc ouc hscr
hscr een
een
Operating.............................................. 317
Tow
Tow -awa
-a wa y pr ot
y pr otection
ection
Fu nction................................................ 106
Priming/deactivating............................. 107 Ind
ex
549
549