2021 MERCEDES-BENZ GLS SUV tow

W
W
ar
ar ning/indicat
ning/indicat or lampP
or lam pP ossible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
ï
Tr ailer tow hitch warning
lamp *T
hered trailer hitch warning lamp is lit.
The trailer hitch is not operational or is swivelling. &
W
WARNING
ARNING Risk of an accident if the ball neck is not loc ked
The trailer may become de tach ed. #
Stop theve hicle immediately in accordance with the tra1c conditions. Do not continue driving. #
Uncouple the trailer and secure it against rolling away. #
Initiate a new swivelling procedu reand do not re-couple the trailer until the display message disappears. #
Notethe messages on the instrument displa y.
If th e trailer hitch is swivelling: #
Wait until the ball neck has reached the operational position. Display messages and
warning/indicator lamps
507
507

Fr
ont airbag (driver, front passenger)........ 48
Installation locations................................ 48
Knee airbag............................................. 48
Overview.................................................. 48
PA SSENGER AIR BAG indicator la mps...... 53
Pr otection................................................ 49
Re duced pr otection.................................. 50
Side airbag.............................................. 48
Wi ndow airbag......................................... 48
Air0 ow
Air0ow
Setting................................................... 178
AIRMA AIRMA TIC
TIC
Setting................................................... 269
Suspension............................................ 267
Alar
Alar m syst m syst em
em
see ATA (anti-theT alarm system)
All-wheel dr
All-wheel dr ive
ive
see 4M ATIC
Ambient lighting
Ambient lighting Setting (MBUX multimedia system)........ .167
Andr
Andr oid A
oid A uto
uto
see Smartphone integ ration
Animals
Animals Pets in theve hicle.................................... 80 Anti-loc
Anti-loc k br
k braking syst
aking syst em
em
see ABS (Anti-lock Braking System)
Anti-skid c
Anti-skid c hains
hains
see Sn owchains
Anti-t
Anti-theT heTprot
pr otection
ection
Ad ditional door loc k................................. 84
Immobiliser............................................ 105
Anti-t
Anti-theT heTprot
pr otection
ection
see ATA (anti-theT alarm system)
Anticipat
Anticipat or
ory occupant pr ot
y occupant pr otection
ection
see PRE-SAFE ®
(anticipatory occu-
pant pr otection)
see PRE-SAFE ®
PLUS (anticipatory
occupant pr otection plus)
Apple CarPlay
Apple CarPlay ®
®
see Smartphone integ ration
Assist
Assist ance syst
ance syst ems
ems
see Driving saf ety sy stem
ASS YS
ASS YST PL
T PL US
US
Battery disconnection period s................ 365
Displaying the service due dat e.............. 364
Fu nction/no tes...................................... 364
Re gular maintenance work..................... 364 Special service
requ irements................. 364
A
A T
TA
A (anti-t
(anti-theT heTalar
alarm syst
m syst em)
em)
Deactivating the alarm........................... 106
Fu nction................................................ 105
Interior pr otection function.....................1 07
Priming/deactivating interior pr otec-
tion........................................................ 107
Priming/deactivating tow- awa y pro-
te ction................................................... 107
To w- awa y protection function................. 106
A
A TTENTION ASSIST TTENTION ASSIST
Function................................................ 237
Setting.................................................. .238
System limitations.................................. 237
A
A tt
tt ention assist
ention assist ant
ant
see ATTENTION ASSIST
A
A ut
ut hor
hor ised w
ised w ork
orkshop
shop
see Quali/ed specialist workshop
A
A ut
ut omatic car w
omatic car w ash mode
ash mode
Ac tivating............................................... 373
A
A ut
ut omatic co-dr
omatic co-dr iv
iver airbag
er airbag shut
shuto.
o.
Fu nction of co-driver airbag shuto........... 51
A
A ut
ut omatic dist
omatic dist ance contr
ance control
ol
see Active Distance Assist DISTRONIC Index
521
521

Dat
Dat
a st
a st or
or age
age
Data pr otection rights.............................. 41
Electronic control units............................ 38
Online services........................................ 41
Ve hicle..................................................... 38
Deactiv Deactiv ating t
ating the alar
he alar m (AT
m (ATA)
A)........................ .106
Dealer Dealer ship ship
see Quali/ed specialist workshop
Declar
Declar ation of conf
ation of conf or
ormity
mity
Elect romagnetic compatibilit y.................. 26
Impor ter addresses.................................. 33
Jack......................................................... 34
Speci/c absor ption rate........................... 27
TIREFIT kit................................................ 34
Wi reless vehicle component s................... 27
Decor
Decor ativ
ativ e f e foil (cleaning ins
oil (cleaning instr tructions)
uctions)........... 375
DeN
DeNOx ag Ox ag ent
ent
see AdBlue ®
Des
Destination entry tination entry
Entering a POI or addres s....................... 331
Det
Det ecting inatt
ecting inatt entiv
entiveness
eness
see ATTENTION ASSIST
Diagnos
Diagnostics connection tics connection.................................. 35 Diesel
Diesel
Low outside tempe ratures...................... 427
No tes..................................................... 427
Digit
Digit al Owner's Manual
al Owner's Manual.................................. 20
Dingh
Dingh yto
y to wing
wing
see Tow- bar system
DIRECT SELECT lev
DIRECT SELECT lev er
er
Engageing reve rsege ar.......................... 210
Engaging drive position.......................... 211
Engaging neutral................................... .210
Engaging park position automaticall y...... 210
Fu nction................................................ 209
Selecting park position........................... 210
Displa
Displa y (car
y (care)
e)............................................... 378
Displa
Displa y (MBUX multimedia syst
y (MBUX multimedia syst em)
em)
Home sc reen.........................................3 16
Operating.............................................. 317
Displa
Displa y (on-boar
y (on-boar d com
d comput
puter)
er)
Displa yson the inst rument displa y......... 312
Displa
Displa y in t
y in the windscr
he windscr een
een
see Head-up display
Displa
Displa y message
y message
Calling up (on-board computer).............. 442 No
tes..................................................... 442
Displa
Displa y messag
y messag es
es
ç - - - km/h .................................... .473
È - - - km/h..................................... 472
h - - - km/h..................................... 472
# 12 V battery See Owner's Man-
ual......................................................... 492
Û 48 V battery See Owner's Man-
ual......................................................... 494
: Active Light System inoperative..... 449
¯ AdBlue system fault Emer. op.:
max. XXX km/h Start not poss. in
XXX km.................................................. 501
¯ AdBlue system fault Emer gency
op. in XXX miles See Owner's Manual.... 500
¯ AdBlue system fault Engine
start not possible................................... 501
¯ AdBlue system fault See Own-
er's Manual............................................ 500 526 526
Ind
ex

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

Update
failed......................................... 452
Update failed SoTware remains
unchanged............................................. 452
Update successfully comple ted.............. 452
Wi per malfunctioning .............................460
Wi thout changing gear, consult work-
shop ...................................................... 465
Dist
Dist ance contr
ance contr ol
ol
see Active Distance Assist DISTRONIC
DIS
DIS TR
TRONIC
ONIC
see Active Distance Assist DISTRONIC
Door
Door
Additional door loc k................................. 84
Child saf ety lock (rear door )..................... 78
Locking/unlocking (emer gency key)........ .88
Opening (from inside).............................. .85
Po we r closing function............................. 87
Unlocking (from inside)............................ 85
Door contr
Door contr ol panel
ol panel......................................... 14
Door contr
Door contr ol panel (r
ol panel (rear)
ear) ................................ 16
Do
Do wnhill dr
wnhill dr iving assist
iving assist ance
ance
see DSR Dra
Dra
wbar
wbar
see Tow- bar system
Dr
Dr iv
ive Awa
e Away Assi st
y Assi st........................................ .295
Dr
Dr iv
ive position
e position
Engaging................................................ 211
Dr
Dr iv
ive pr
e pr ogr
ogram display
am display .................................. 207
Dr
Dr iv
ive pr
e pr ogr
ograms
ams
see DYNAMIC SELECT
Dr
Dr iv
iver's seat
er's seat
see Seat
Dr
Dr iving abr
iving abr oad
oad
Light adjustment (l owbeam).................. 160
Dr
Dr iving safe
iving safe ty syst
ty system
em
ABS (Anti-lock Braking System)............. .231
Ac tive Brake Assist................................. 253
Ad aptive brake lights.............................. 236
BAS (Brake Assist System).................... .231
Cameras................................................2 29
EBD (Electronic Brake forc e Distribu-
tion).......................................................2 35
ESP ®
Crosswind Assist.......................... 233
ESP ®
trailer stabilisation........................ 233
O.- road ABS.......................................... 231 Overview...............................................
.230
Ra dar and ultrasonic sensor s................. 229
Re sponsibility......................................... 229
ST EER CONTROL................................... 235
Dr
Dr iving syst
iving syst em
em
see 360° Camera
see Active Blind Spot Assist
see Active Distance Assist DISTRONIC
see Active Emer gency Stop Assist
see Active Lane Keeping Assist
see Active Parking Assist
see Active Speed Limit Assist
see Active Steering Assist
see AIRMATIC
see ATTENTION ASSIST
see Blind Spot Assist
see Cruise cont rol
see Driving saf ety sy stem
see DSR
see E- ACTIVE BODY CONTROL
see HOLD function
see Limiter
see Parking Assist PARKTRONIC
see Reversing camera
see Speed Limit Assist Index
531 531

Emerg
Emerg
ency call
ency call
see Mercedes-Benz emer gency call system
Eme rg
Emerg encykey
ency key
Inserting/ removing.................................. 83
Locking/unlocking the door s................... 88
Unlocking theta ilgate.............................. 95
Emerg
Emerg ency oper
ency oper ation mode
ation mode
St arting theve hicle............................... .192
Emerg
Emerg ency r
ency release
elease
Ta ilgate.................................................... 95
Emerg
Emerg ency spar
ency spar e wheel
e wheel
In0ating.................................................4 15
No tes..................................................... 414
Engine
Engine Engine number....................................... 423
Starting (emer gency ope ration mode ).... 192
St arting (Remo teOnline)........................ 193
Engine data
Engine data
Displaying............................................. .207
Engine electr
Engine electr onics
onics
No tes..................................................... 420
Engine number Engine number............................................. 423 Engine oil
Engine oil
Additives................................................ 430
Capacity................................................ 431
Checking the oil le vel using the on-
board computer.....................................3 67
MB-F reigabe or MB-Appr oval................. .431
Quality................................................... 431
To pping up............................................ .368
Ent Ent er
ering/e
ing/e xiting lev
xiting lev el
el
Setting................................................... 272
ERA
ERA -GL
-GLON
ONASS tASS t es
est modet mode
St arting/ending.................................... .354
Err
Err or message
or message
see Display message
ESC (Electr
ESC (Electr onicSt
onic Stability Contr
ability Contr ol)
ol)
see ESP ®
(Elect ronic Stability Prog ram)
ESP
ESP ®
®
Crosswind Assis t.................................... 233
Tr ailer stabilisatio n................................. 233
ESP
ESP ®
®
(Electr
(Electronic St
onic Stability Pr
ability Pr ogr
ogram)
am)
Ac tivating/deactivating.......................... 234
Fu nction/no tes...................................... 232
EU type approv
EU type appr oval number
al number ............................. 423 Ext
Ext
endable r
endable r unning boar
unning boar ds
ds ............................. 89
Ext
Ext endable st
endable st ep
ep
see Running boa rds
Ext
Ext er
erior lighting
ior lighting
Car e...................................................... 376
Ext
Ext er
erior lighting
ior lighting
see Lights F
F
F
F atigue det
atigue det ection
ection
see ATTENTION ASSIST
F
F ir
ir e e
e e xtinguisher
xtinguisher.......................................... 381
F
F irs
irst-aid kit t-aid kit (soT
(soTsided)
sided)................................. 381
Flacon
Flacon Inserting/removing................................ 182
Flat to
Flat towing
wing
see Tow- bar system
Flat tyre
Flat tyre MOExtended tyres................................. 382
Notes..................................................... 382
TIREFIT kit.............................................. 384
Wheel chang e........................................ 409
Floor mats
Floor mats................................................... 158 Index
533 533

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

P
P
er
er missible axle load
missible axle load ....................................4 23
P
P er
er missible to
missible towing met
wing met hods
hods........................ .393
Pe
Pe tr
trol
ol........................................................... 426
Pe
Pe ts in t
ts in t he v
he vehicle
ehicle.......................................... 80
Plas
Plastic tr tic tr im (Car
im (Car e)
e)........................................ 378
P
P os
ost-collision br t-collision br ake
ake........................................ 57
Pow
Pow er closing function
er closing function
Door........................................................ 87
Pow
Pow er supply
er supply
Switching on (start/s top button)............ 190
PRE-S
PRE-S AFE
AFE®
®
(anticipat
(anticipat or
ory occupant pr ot
y occupant pr otection)
ection)
Fu nction.................................................. 55
PRE-SAFE ®
Sound................................... 55
Re versing measures................................. 56
PRE-S
PRE-S AFE
AFE®
®
Im
Im pulse Side
pulse Side
Ac tivation................................................ 43
Fu nction.................................................. 56
PRE-S
PRE-S AFE
AFE®
®
PL
PL US (anticipat
US (anticipat or
ory occupant
y occupant
pr ot
pr otection plus)
ection plus)
Fu nction.................................................. 56
Re versing measures................................. 56 Pr
ev
Pr ev ent
ent ativ
ativ e occupant pr ot
e occupant pr otection syst
ection syst em
em
see PRE-SAFE ®
(anticipatory occu-
pant pr otection)
see PRE-SAFE ®
PLUS (anticipatory
occupant pr otection plus)
Pr
Pr o/le
o/le
Creating a new pro/le............................ 323
No tes..................................................... 322
Selecting pro/le options......................... 323
Pr
Progr ogr amme
amme
see DYNAMIC SELECT
Pr ot
Pr otection of t
ection of t he en
he envir
vironment
onment
No tes...................................................... .22
Ta ke -back of end-of-life vehicles............... 22 Q
Q
QR code
QR code Rescue car d............................................ .38
Quali/ed
Quali/ed specialist w
specialist w ork
orkshop
shop .........................36 R
R
R
R adar and ultr
adar and ultr asonic senso rs
asonic senso rs
Damage................................................. 229 R
R
adio
adio
Overview of the functions and symbols.. .360
R
R ain closing function
ain closing function
Side windo ws........................................... 97
R
R ain-closing f
ain-closing f eature
eature
Sliding sunroof....................................... 102
R
R aising t
aising t he v
he vehicle
ehicle
Re ar of theve hicle................................. 272
REAC
REACH r H regulation
egulation........................................... 37
R
R eading lamp
eading lamp
see Interior lighting
R
R eading light
eading light
Switching on/o. (contactless)............... 321
R
R eal w
eal w ood (Car
ood (Car e)
e).......................................... 378
R
R ear climat
ear climat e contr
e control
ol
Setting (MBUX multimedia system)......... 180
R
R ear door (c
ear door (c hild safe
hild safety loc
ty lock)
k)........................... 78
R
R ear f
ear f og light
og light
Switching on/o..................................... 161
R
R ear of t
ear of t he v
he v ehicle
ehicle
Lo we ring................................................ 272
Ra ising................................................... 272 Index
543
543