2021 MERCEDES-BENZ GLS SUV Owners Manual

&
W
WARNI NG
ARNI NGRisk of accident due tomis-
judgement of distance when using the
outside mir ror
The outside mir rors re0ect objects on a
smaller scale. The objects in vi eware in fact
closer than they appear. #
Therefore, alw ays look overyo ur shoul-
der in order toensure that you are aware
of the actual distance between you and
th ero ad users driving behind you. F
F
olding t
olding t he outside mirr
he outside mirr or
ors in/out
s in/out #
Brie0y press button 2.
% Ifth e battery has been disconnected or has
dischar ged, the outside mir rors must be
mo ved brie0y using button 2. Onlythen will
th e automatic mir rorfo lding function work
proper ly. %
Mercedes-Maybach vehicles: when the out-
side mir rors fold in, theex tendable running
boa rds will retract if they wereprev iously
ex tended.
A
A djus
djusting t ting t he outside mirr
he outside mirr ors
ors #
Press button 1or3 toselect the outside
mir rorto be adjus ted. #
Use button 4toadjust the position of the
mir ror glass.
Eng Eng aging t aging t he outside mirr
he outside mirr ors
ors
If an outside mir ror has been forc ibly disengaged,
proceed as follo ws. #
Vehicles without elect rically folding outside
mir rors: manually mo vethe outside mir ror into
th e cor rect position. #
Vehicles with elect rically folding outside mir-
ro rs: press and hold button 2.
Yo u will hear a click and the mir ror will audibly
click into place. The outside mir ror will now be
set tothe cor rect position. 174
174
Light and sight

A
A
ut
ut omatic anti-dazzle mirr
omatic anti-dazzle mirr or
ors function
s function &
W
WARNING
ARNING Risk of acid burns and poison-
ing due tothe anti-dazzle mir ror electro-
ly te
Electrolyte may escape if the glass in an auto-
matic anti-dazzle mir ror breaks.
The electrolyte is hazardous tohealth and cau-
ses ir rita tion. It must not come into contact
with your skin, eyes, respiratory or gans or
clo thing or be swallo wed. #
Ifyo u come into contact with electrolyte,
obser vethefo llowing:
R Immediate lyrinse the electrolyte
from your skin with water and seek
medical attention.
R If electrolyte comes into contact with
your eyes, immediately rinse them
th oroughly with clean water and seek
medical attention.
R Ifth e electrolyte is swallo wed, imme-
diately rinse your mouth out thor-
oughl y.Do not induce vomiting. Seek
medical attention immediatel y. R
Immediately change out of clo thing
which has been contaminated with
electrolyte.
R If an allergic reaction occurs, seek
medical attention immediatel y. The inside
rear-view mir ror and the outside mir ror
on the driver's side will automatically go into anti-
dazzle mode if light from a headlamp hits the sen-
sor on the inside rear-view mir ror.
Syst Syst em limits
em limits
The system will not go into anti-dazzle mode if: R theve hicle is switched o..
R Reversege ar is engaged.
R The interior lighting is switched on. F
F
r
ront-passeng
ont-passeng er outside mirr
er outside mirr or par
or parking position
king position
function
function %
The parking position is available only in vehi-
cles with a memory function.
The parking position makes parking easier. In
thefo llowing situations, the front-passenger
outside mir ror will swivel down wards in the direc-
tion of there ar wheel on the front passenger's
side:
R the parking position is stored (/ page 176)
R The front-passenger mir ror is selected
R Reversege ar is engaged.
The front-passenger outside mir ror will mo veback
to its original position in thefo llowing situations:
R You shiT the transmission toano ther transmis-
sion position
R You are tr avelling at speeds greater than
15 km/h
R You press the button forth e outside mir ror on
th e driver's side Light and sight
175
175

S
S
t
tor
or ing and calling up t
ing and calling up t he par
he parking position of t
king position of t he
he
fr
fr ont-passeng
ont-passeng er outside mirr
er outside mirr or
orS S
t tor
or ing
ing #
Select the front-passenger outside mir ror
using button 1. #
Engage reve rsege ar. #
Movethe front-passenger outside mir ror into
th e desired parking position using button 2.Calling up
Calling up #
Select the front-passenger outside mir ror
using button 1. #
Engage reve rsege ar.
The front-passenger outside mir ror will mo ve
to the stored parking position. A
A
ctiv
ctiv ating/deactiv
ating/deactiv ating t
ating the aut
he automatic mirr
omatic mirr or f
or fold-
old-
ing function
ing function Multimedia system:
4 © 5
Settings 5
Vehicle #
Switch Automatic fold-in on or o.. Ar
Ar
ea per
ea per meable t
meable t o r
o radio wav
adio waves on t
es on t he wind-
he wind-
scr
scr een
een Ra
dio-controlled equipment, such as toll systems,
can be mounted only on areas 1ofthe wind-
screen that are permeable toradio waves.
Areas permeable toradio waves1 are best visi-
ble from outside theve hicle when the windscreen
is illuminated with an extern al light source.
No tethis position forve hicles with:
R Windsc reen heating
R Infrared re0ective windscreen 176
176
Light and sight

Infr
Infr
ar
ared-r
ed-r e0ective
e0ective windscr
windscreen function
een function
The infrared-re0ective windscreen is coated and
re duces the build-up of heat in theve hicle interior.
The coating shields theve hicle interior from radio
wa ves. Light and sight
177 177

Ov
Ov
er
ervie
vie w of climat
w of climat e contr
e control syst
ol systems
ems N
No
ot
tes on climat
es on climat e contr
e control
ol An interior air /lter in combination with
the pre/l-
ter inthe engine compartment must alw ays be
used so that the air conditioning system, pollution
le ve l monitoring and the air /lt ration workcor-
re ctl y.Use /lters recommended and appr oved by
Mercedes-Benz. Alw ays ha vemaintenance work
car ried out at a quali/ed specialist workshop. Ov
Ov
er
ervie
vie w of t
w of t he air conditioning contr
he air conditioning contr ol panel
ol panelThe indicator lamps on
the buttons indicate that
th e cor responding function is activated. THERM
OTRO NIC air conditioning cont rol panel with
stationary heater (e xample)
1 w Setsthete mp erature on the driver's
side
2 A Calls up the air conditioning menu
3 H Setsthe air0ow or switches o. climate
control
4 Ã Sets climate control toautomatic mode
(/ page 180)
5 ¬ Demisting the windscreen
6 ¤ Switches there ar wind owheater on/o.
7 g Switches air-recirculation mode on/o.
(/ page 181) 8
Á Switches the A/C function on/o.
(/ page 179)
Switches residual heat on/o.
(/ page 181)
9 Vehicles with THERM ATIC or THERM OTRO NIC
control panel with stationary heater: &
swit ches stationary heater on/o.
(/ page 183)
Ve hicles with THERM ATIC or THERM OTRO NIC
control panel without stationary heater: 0
swit ches synchronisation on/o.
(/ page 181)
A w Setsthete mp erature on the front
passenger side
% THERMAT IC equipment is available for all vehi-
cles except Mercedes-M aybach vehicles. 178
178
Climate cont
rol

Ov
Ov
er
ervie
vie w of t
w of t he r
he rear oper
ear oper ating unit
ating unit 1
Sets thete mp erature, leT
2 Sets the air distribution, leT
3 Sets climate control toautomatic mode
(/ page 180)
4 Sets the air0ow
5 Switches climate control on/o.
(/ page 179)
Switches residual heat on/o. (/ page 181)
6 Sets the air distribution, right
7 Sets thete mp erature, right
The settings forth e second and third row of seats
(equipment-dependent) can be made via there ar operating unit,
the multimedia system
(/ page 180) or the MBUX rear tablet depending
on theve hicle's equipment. Oper Oper
ating t
ating t he climat
he climat e contr
e control syst
ol system
em Switc
Switc
hing climat
hing climat e contr
e control
olon/o.
on/o. #
T
To switc
o switc h on:
h on:setthe air0ow toleve l 1 or
higher using theH button. #
T
To switc
o switc h
ho.:
o.: setthe air0ow toleve l 0 using
th eH button.
If climate control is switched o., the windo ws
may mist up more quickl y.Switch climate control
o. only brie0 y. Switc
Switc
hing t
hing t he climat
he climat e contr
e control in t ol in the r
he rear
earon/o.
on/o. #
Press button 5.
% When climate control in the second seat row
is switched o., the indicator lamp is activated
and OFF OFF is shown on there ar displ ay. Switc
Switc
hing t
hing t he A/C function
he A/C function on/o.
on/o. using t
using the air
he air
conditioning contr
conditioning contr ol panel
ol panel The A/C
function heats, cools and dehumidi/es
th eve hicle's interior air. #
Press theÁ button.
Switch o. the A/C function only brie0y; other-
wise, the windo wsmay mist up more quickl y.
Condensation may drip from the underside of the
ve hicle when cooling mode is active. This is not
indicati veof a fault. Calling up t
Calling up t
he air conditioning menu
he air conditioning menu Calling up t
Calling up t
he air conditioning menu using t
he air conditioning menu using t he
he
multimedia syst
multimedia syst em
em #
Select one of thete mp erature displa ysatthe
lo we r edge of the media displa y.
Calling up t
Calling up t he air
he air-conditioning menu using t
-conditioning menu using t he
he
butt
butt on on t
on on t he climat
he climat e contr
e control panel
ol panel #
Press the! button on the climate control
panel. Climate control
179
179

A
A
ctiv
ctiv ating/deactiv
ating/deactiv ating t
ating the A/C function via t
he A/C function via t he
he
multimedia syst
multimedia syst em
emMultimedia system:
4 Climate menu 5
First row of seats
The A/C function heats, cools and dehumidi/es
th eve hicle's interior air. #
Select A/C. Se Se
tting climat
tting climat e contr
e control t
ol to aut
o aut omatic mode
omatic mode In automatic mode,
the set temp erature is con-
trolled and maintained at a constant le velby the
air suppl y. #
Press theà button. #
T To switc o switc h t
h to manual mode:
o manual mode: pressthe Ã
button.
In automatic mode, you can choose between /ve
di.erent air quantities using theH button.
Au tomatic mode is retained. A
A
ut
ut omaticall
omaticall y contr
y controlling t
olling the climat
he climat e contr
e control in
ol in
t
t he r
he r ear
ear In automatic mode,
the set temp erature is regula-
te dby thete mp erature of the dispensed air and
th e air0o w. #
Press theà button (/ page 179). Se
Se
tting t
tting t he air dis
he air distr tribution
ibution Multimedia system:
4 Climate menu #
Call up the air conditioning menu
(/ page 179). #
Select a row of seats. #
T
T o se
o se t t
t the air dis
he air dis tr
tr ibution:
ibution: select¯,P
or O. #
Set the air0o w.
% Several air distribution options can be selec-
te d at the same time, forex ample toset the
climate cont rolfo rth e windscreen and the
fo ot we lls simultaneousl y.
The ¯ climatecont rolfo rth e windscreen
can only be selected forth e /rst seat row. Se
Se
tting climat
tting climat e contr
e control fol for t
or t he r
he r ear passeng
ear passeng er
er
com
com par
partment (multimedia syst
tment (multimedia syst em)
em) Multimedia system:
4 Climate menu 5
Second row of seats
Se
Se tting t
tting t he t
he tem
emper
per ature
ature #
Select Second row of seats orThird row of
seats.
% Maybach vehicles are only /tted with one and
two rows of seats. #
Set thete mp erature.
Se
Se tting t
tting t he
heair0ow
air0ow #
Select Second row of seats orThird row of
seats.
% Maybach vehicles are only /tted with one and
two rows of seats. #
Set the air0o w.
Contr
Contr olling t
olling t he r
he rear climat
ear climat e contr
e control aut
ol automatically
omatically #
Select REAR AUTO.
Re ar climate cont rol is controlled automati-
call y. 180
180
Climate control

Deactiv
Deactiv
ating r
ating rear climat
ear climat e contr
e control
ol #
Select REAR OFF.
Re ar climate cont rol is deactivated. Switc
Switc
hing t
hing t he sync
he sync hr
hronisation function
onisation function on/o.
on/o.via
via
t
t he air conditioning contr
he air conditioning contr ol panel
ol panelClimate control can be set centrally using
the syn-
ch ronisation function. The temp erature and air
distribution setting forth e driver's side will be
adop ted automatically for all climate control
zones. #
Press the0 button.
The synchronisation function will be deactivated if
th e settings for one of theot her climate zones are
ch anged. Switc Switc
hing t
hing t he sync
he sync hr
hronisation function
onisation function on/o.
on/o.via
via
t
t he multimedia syst
he multimedia syst em
em Multimedia system:
4 Climate menu 5
First row of seats
Climate cont rol can be set centrally using the syn-
ch ronisation function. The driver's settings forte
mp erature, air quantity and air distribution are
adop ted automatically for all climate zones. #
Select SYNCand switch on or o.. Demis Demisting t
ting the windo ws
he wind ows W
W
indow
indow s mist
s mist ed up on t
ed up on t he inside
he inside #
Press theà button. #
Ifth e windo wscontinue tomist up: press the
¬ button.
W
W indow
indow s mist
s mist ed up on t
ed up on t he outside
he outside #
Switch on the windscreen wipers. #
Press theà button. Switc
Switc
hing air
hing air -r
-recir
ecir culation mode
culation mode on/o.
on/o. #
Press theg button.
The interior air will be recirculated.
Air-recirculation mode automatical lyswitches to
fresh air mode aTer a while. %
If air-re circulation mode is switched on, the
wind ows may mist up more quickl y.Switch on
ai r-re circulation mode only brie0y. Switc
Switc
hes t
hes the r
he residual heat
esidual heat on/o.
on/o. R
R
eq
eq uir
uir ements:
ements:
R theve hicle is par ked.
It is possible tomake use of there sidual heat
from the engine tocontinue heating or ventilating
th e front compartment of theve hicle for appr ox-
imately 30 minutes, depending on thete mp era-
ture set. #
T
To activ
o activ at
ate:
e: press button Á.
Re sidual heat will be switched o. automaticall y. Switc
Switc
hing t
hing t he r
he residual heat in t
esidual heat in t he r
he rear
earon/o.
on/o. R
R
eq
equir uir ements:
ements:
R The vehicle is par ked.
When there sidual heat of the engine is activated
in there ar compartment, you can heat or ventila te Climate control
181
181