2019 MERCEDES-BENZ GLS SUV towing

Symbols
........................................................ 5At
agl ance .................................................... 6
Cockpit ........................................................... 6
Wa rning and indicator lamps ........................ 10
Overhead contro l panel ................................ 12
Door control panel and seat adjustment ....... 14
Control settings in there ar compartment .... .16
Emergencies and breakdowns ...................... 18Digital Owner's Manual
.............................20
Calling up the Digital Owner's Manual ..........20 Genera
l notes............................................. 22
Pr otection of the environment ......................22
Ta ke -ba ckof end-of-life vehicles ...................22
Mercedes-Benz Genuine Parts ......................23
Owner's Manual ............................................ 24
Operating saf ety .......................................... .24
Declaration of Conformity ............................ 26
Diagno stics connection ................................ 30
Qualified specialist workshop ....................... 31
Ve hicle registration ....................................... 31Cor
rect use of theve hicle ............................32
Information on the REA CHregulation ........... 32
Implied warranty .......................................... .32
QR code forre scue card ...............................32
Data storage .................................................32
Copyright ...................................................... 35 Occupant saf
ety......................................... 36
Re stra int sy stem ...........................................36
Seat belts ..................................................... 38
Airbags ......................................................... 42
PRE-SAFE ®
sy stem ....................................... 50
Safely transporting children in theve hi‐
cle ................................................................52
No tes on pets in theve hicle .......................... 81 Opening and closing
.................................. 82
Ke y .............................................................. .82
Doo rs............................................................ 86
Load compa rtment ....................................... 92
Ro ller sunblinds ............................................ 97
Side windo ws................................................ 97
Sliding sunroof ............................................ 102
Anti-theft pr otection ................................... 108 Seats and
stowing .................................... 11 2
No tes on the cor rect driver's seat posi‐
tion .............................................................. 11 2
Seats ........................................................... 11 3
St eering wheel ............................................ 12 8
Easy entry and exitfeature ........................ .130
Operating the memory function .................. 131
St ow age areas ............................................ 13 3
Cup holders ................................................ 14 8
Ashtr ayand cigar ette lighter ...................... .150
Soc kets ....................................................... 151
Wi reless charging of the mobile phone
and connection with theex terior aerial ...... 154
Fitting/removing thefloor mats ................. 15 6 Light and sight
......................................... 157
Exterior lighting .......................................... 157
Interior lighting ........................................... 16 4
Wi ndsc reen wipers and windscreen
wa sher sy stem ............................................ 16 5
Mir rors ........................................................ 17 0
Operating the sun visors ............................. 173
Area pe rmeable toradio wav es on the
windscreen ................................................ .174 2
Contents

Infrared-reflective windscreen function .......
174Climate control
......................................... 175
Overview of climate contro l systems ..........1 75
Operating the climate control sy stem ......... 17 7 Driving and pa
rking ................................. 18 9
Driving ........................................................ 189
DY NA MIC SELECT switch ........................... 203
Au tomatic transmission .............................. 205
Tr ans fer case .............................................. 210
Fu nction of the 4MATIC ...............................2 11
Re fuelling .................................................... 212
Pa rking ........................................................ 218
Driving and driving sa fety sy stems .............2 28
Tr ailer hit ch................................................. 311
Bicycle rack ................................................ 316
Ve hicle towing instructions ........................ .318 Instrument Display and on-board
compu ter................................................... 319
Instrument display overview ...................... .319 Overview of
the buttons on thesteering
wheel ..........................................................3 20
Operating the on-board computer .............. 320
Ad justing the design of the instrument
display ........................................................ 322
Showing display conte nt onthe instru‐
ment clus ter ............................................... 322
Overview of displa yson the multifunc‐
tion display .................................................3 24
Ad justing the instrument lighting ................3 24
Menus and submenus ................................ 325
Head-up Display ......................................... 332 LINGU
ATRO NIC ........................................ 333
No tes on operating saf ety .......................... 333
Ope ration ................................................... 333
Using LINGU ATRO NIC ef fectively ............... 336
Essential voice commands ........................ .337 MBUX multimedia sy
stem ...................... 352
Overview and operation .............................. 352
Sy stem settings .......................................... 388
Fit & Healt hy............................................... 399
Na vigation .................................................. 405 Te
lephone .................................................. .450
Online and Internet functions ..................... 487
Media ........................................................ .496
Ra dio .......................................................... 504
TV ............................................................... 507
Sound ......................................................... 51 5
MBUX rear tablet ........................................ 519
Re ar Seat En tertainment Sy stem ................5 21 Maintenance and care
.............................531
ASS YST PLUS service inter val display ........ .531
Engine compartment .................................. 532
Cleaning and care ....................................... 538 Breakdown assistance
............................549
Emergency ................................................. .549
Flat tyre ...................................................... 550
Battery (vehicle) ......................................... 557
To w- starting or towing away ....................... 562
Electrical fuses ........................................... 567 Contents
3

Re
versing the PRE- SAFE®
sy stem measures If an accident did not occur,
the pre-em ptive
measures that we retak en are reve rsed.
Yo u will need toper form certain settings your‐
self. #
Ifth e seat belt pre-tensioning is not reduced,
mo vethe seat backrest back slightl y.
The locking mechanism releases. Fu
nction of PRE-SAFE ®
PLUS (anticipatory
occupant pr otection plus) PRE-
SAFE®
PLUS can de tect cer tain impacts,
particular lyan imminent rear impact, and take
pre-em ptive measures toprotect theve hicle
occupants. These measures cannot necessarily
pr eve nt an imminent impact.
PRE-SAFE ®
PLUS can implement thefo llowing
measures independently of each other:
R Tightening the seat belts on the driver's seat
and front passenger seat.
R Activating there ar hazard warning lights at a
higher flashing frequenc y. R
Increasing brake pressure when theve hicle
is stationar y.This brake application is cancel‐
led automatically when theve hicle pulls
aw ay.
If an accident did not occur, the pre-em ptive
measures that we retake n are reve rsed.
Sy stem limitations
The sy stem will not initiate any action in thefo l‐
lowing situations:
R when reve rsing
or
R when theve hicle is towing a trailer and there
is a risk of a rear impact
The sy stem will not initiate any braking applica‐
tion in thefo llowing situations:
R whilst driving
or
R when entering or exiting a parking space
while using Active Parking Assist Information on PRE-
SAFE®
Impulse Side If an imminent side impact is de
tected, PRE-
SA FE®
Impulse Side can pre-emptively mo vethe
front seat vehicle occupant's upper body
to wa rdsth e cent reoftheve hicle. It does this by
ra pidly inflating an air cushion in the outer seat
side bols ter of the seat backrest on the side on
which the impact is anticipated. This increases
th e dis tance between the door and theve hicle
occupant.
If PRE-SAFE ®
Impulse Side has been deplo yed or
is faulty, thePRE-SAFE impulse side inoperative
See Owner's Manual
(/ page
61 2)
display message appears. Oc
cupant saf ety51

Note
s onthe cor rect driver's seat position &
WARNING Risk of inju rythro ugh adjust‐
ing vehicle settings while theve hicle is in
motion
Yo u could lose cont rol of theve hicle in the
fo llowing situations:
R ifyo u adjust the driver's seat, the head
re stra ints, thesteering wheel or the mir‐
ro r while theve hicle is in motion
R ifyo ufast enyour seat belt while theve hi‐
cle is in motion #
Before starting the engine: adjust the
driver's seat, the head restra ints, the
st eering wheel or the mir ror and fasten
yo ur seat belt. Ensure
thefo llowing when adjusting thesteering
wheel 1, seat belt 2and driver's seat 3:
R you are as faraw ay from the driver's airbag
as possible
R you are sitting in an upright position
R your thighs are slight lysuppor tedby the seat
cushion R
your legs are not fully extended and you can
depress the pedals properly
R the back of your head is suppo rted at eye
le ve lby the cent reofthe head restra int
R you can hold thesteering wheel with your
arms slightly bent
R you can mo veyour legs freely
R you can see all the displa yson the instru‐
ment clus ter clea rly
R you ha vea good overview of the traf fic con‐
ditions
R your seat belt is pulled snug lyagainst your
body and is routed across the cent reofyour
shoulder and across your hips in the pelvic
area 11 2
Seats and stowing

Seats
Ad
justing the front seat &
WARNING Risk of becoming trapped if
th e seats are adjus tedby children
Children could become trapped if they adjust
th e seats, particularly when unattended. #
When leaving theve hicle, alw aysta ke
th eke y with you and lock theve hicle.
This also applies tothe digital vehicle
ke y if the "Digital Vehicle Key" function
is activated via Mercedes me connect. #
Never lea vechildren unat tended in the
ve hicle. The seats can be adjus
ted when the ignition is
switched off. &
WARNING Risk of becoming trapped
when adjusting the seats
When you adjust a seat, you or other vehicle
occupants could become trapped, e.g. on the
seat guide rail. #
When adjusting a seat, make sure that
no one has any body parts in the sweep
of the seat. Obser
vethe saf ety no tes on "Airbags" and "Chil‐
dren in theve hicle". &
WARNING Risk of inju rythro ugh adjust‐
ing vehicle settings while theve hicle is in
motion
Yo u could lose cont rol of theve hicle in the
fo llowing situations:
R ifyo u adjust the driver's seat, the head
re stra ints, thesteering wheel or the mir‐
ro r while theve hicle is in motion
R ifyo ufast enyour seat belt while theve hi‐
cle is in motion #
Before starting the engine: adjust the
driver's seat, the head restra ints, the
st eering wheel or the mir ror and fasten
yo ur seat belt. &
WARNING Risk of becoming trapped if
th e seat height is adjus ted carelessly
If yo u adjust the seat height carelessly, you
or other vehicle occupants could be trapped
and thereby injured.
Children in particular could acciden tally
press the electrical seat adjustment buttons
and become trapped. #
While moving the seats, make sure that
hands or other body parts do not get
under the le ver assembly of the seat
adjustment sy stem. &
WARNING Risk of inju rydue tohead
re stra ints which are not fitted or are
adjus ted inco rrectly
If head restra ints are not fitted or are adjus‐
te d incor rectl y,they cannot pr ovide pr otec‐
tion as intended.
There is an increased risk of injury in the
head and neck area, e.g. in theeve nt of an
accident or when braking. Seats and
stowing 11 3

#
Alw ays drive with the head restra ints
fi tted. #
Before driving off, ma kesure forev ery
ve hicle occupant that the cent reofthe
head restra int supports the back of the
head at about eye le vel. Do not inter
change the head restra ints of the
front and rear seats. Otherwise, you will not be
able toadjust the height and angle of the head
re stra ints cor rectl y.
Ad just the head restra int fore -and-aft position so
th at it is as close as possible tothe back of your
head. &
WARNING Risk of inju ryor death due to
incor rect seat position
The seat belt does not of ferth e intended
le ve l of pr otection if you ha venot mo vedthe
seat backrest toan almost vertical position.
When braking or in theeve nt of an accident,
yo u could slide underneath the seat belt and
sus tain abdominal or neck injuries, forex am‐
ple. #
Adjust the seat proper lybefore begin‐
ning your journe y. #
Alw ays ensure that the seat backrest is
in an almost vertical position and that
th e shoulder section of your seat belt is
ro uted across the cent reofyour shoul‐
der. 1
Head restra int height
2 Seat backrest inclination
3 Seat height
4 Seat cushion length
5 Seat cushion inclination
6 Seat fore -and-aft position #
Saving the settings with the memory function
(/ page 131). 11 4
Seats and stowing

Ad
justing the front passen ger seat electri‐
cally from the driver's seat Re
quirement:
R The po wer supp lyhas been switched on
(/ page 189). Yo
u can call up thefo llowing functions forthe
front passenger sea t:
R seat adjustment R
seat heating
R seat ventilation
R memory function #
Toselect the front passenger seat: press
button 1.
When the indicator lamp lights up, the front
passenger seat is selected. #
Adjust the front passenger seat using the
buttons on the door control panel on the
driver's side. #
Select the driver's seat: Pressthe1 but‐
to n again.
When the indicator lamp goes out, the driv‐
er's seat has been selected. Ad
justing the front passen ger seat electri‐
cally from the rear #
Toselect the front passenger seat: press
button 1.
When the indicator lamp lights up, the front
passenger seat is selected. #
Adjust the front passenger seat using the
buttons on the door control panel in there ar
compartment (/ page116). Seats and
stowing 11 5

Ad
justing the 4-w aylumbar support 1
Raise
2 Soften
3 Lower
4 Harden #
Using buttons 1to4 , adjust the conto ur
of the backrest individually tosuit your bac k. Ad
justing the rear seats electrical ly The middle seat backrest is adjus
tedto ge ther
with the left seat. 1
Head restra int height
2 Seat backrest inclination
3 Seat fore -and-aft position Fo
lding there ar seats forw ards electrical ly &
WARNING Risk of becoming trapped
when adjusting the seats
When you adjust a seat, you may trap your‐
self or a vehicle occupant. #
When adjusting a seat, make sure that
no one has any body parts in the sweep
of the seat. &
WARNING Risk of accident if seat and
seat ba ckrest are not engaged
If th e seat and seat backrest are not engaged
th ey could fold forw ards, e.g. when braking
or in theev ent of an accident.
R The seat or seat backrest which is not
engaged will then push theve hicle occu‐
pant against the seat belt. The seat belt
wo uld not be able toprov ide the intended
pr otection and could cause additional
injur y. 11 6
Seats and stowing