2020 MERCEDES-BENZ GLS SUV cooling

#
Depending on theve hicle equipment,
ensure that the sliding sunroof can be
fully raised when thero of luggage rack
is fitted. #
Depending on theve hicle equipment,
ensure that theta ilgate can be fully
opened when thero of luggage rack is
fi tted. #
Position the load on thero of luggage
ra ck in such a wayth at theve hicle will
not sus tain damage even when it is in
motion. *
NO
TEDama getothe panorama sliding
sunroof due tonon-app rove dro of lug‐
ga ge racks The panorama sliding sunroof may be dam‐
aged bythero of luggage rack ifyo u attem pt
to open it when using a roof luggage rack not
te sted and appr ovedfo r Mercedes-Benz. #
When a roof luggage rack isfitted, open
th e panorama sliding sunroof only if this has been
tested and appr oved for
Mercedes-Benz.
The panorama sliding sunroof may be raised
to allow ventilation of theve hicle interior. #
Secure thero of luggage rack tothero of rail‐
ing. #
Obser vethe manufacturer's ins tallation
instructions. Cup holders
Switching
the cooling or heating function for
th etemp erature-cont rolled cup holder on or
off &
WARNING Risk of inju ryby touching the
heating elements
The cup holder's heating elements may be
ve ry hot.
Yo u can burn yourself on them. #
Do not touch the cup holder's hot heat‐
ing elements. #
Ensure that no children can access the
cup holder's hot heating elements. #
Never lea vechildren unat tended in the
ve hicle. *
NO
TEDama getoobjects in thete mp era‐
ture-contro lled cupholder If
yo u place objects into thete mp erature-
controlled cup holder, they may become
dama ged. #
Do not place objects into thete mp era‐
ture-contro lled cup holder. 14 6
Seats and stowing

#
Insert the plug of the device into 230 V
soc ket1.
When the on-board electrical sy stem voltage
is suf ficient, indicator la mp2lights up. Overview of USB ports
Depending on
theve hicle equipment, theve hicle
has thefo llowing USB ports:
R inthestow age compartment of the cockpit
armrest (/ page134)
R inthe front cent reconsole next tothe mobile
phone stowage compartment
R inthere ar centre console
R vehicles with Rear Comfort Package: in the
centre armrest of the second row of seats in
th ere ar compartment
R Mercedes-Maybach vehicles with 5 seats in
th ere ar compartment: in the cent rearmrest
in there ar compartment
R Mercedes-Maybach vehicles with individual
re ar seats: in the cent reconsole of there ar
compartment R
vehicles with thre erow s of seats: totheright
and left next tothe seat
If th e ignition is switched on you can charge USB
devices, e.g. mobile phones, at USB ports. The
ch arging voltage is appr oximately 5 V (up to
3 A). Coolb
ox Using
there frigerator box &
WARNING Risk offire due toa co vered
ve ntilation grille on the coolbox
If yo u co verth eve ntilation grille forth e cool‐
box, it may overheat. #
Alw ays make sure that theve ntilation
grille is not co vered. The
ventilation grille forth ere frigerator box is in
th e boot.
This equipment is available on lyfor Mercedes-
Maybach vehicles.
Subject there frigerator box toa maximum load
of 3.5 kg. St
ore only plastic bottles in the upper compart‐
ment of there frigerator box. The contents of the
bottle must be no more than 0.5 lit res.
I f yo u do not need touse there frigerator box for
an extended pe riod, switch it off, defrost it and
clean it. Af ter doing so, lea vethe lid open for a
time.
The refrigerator box will reduce its cooling capa‐
city or switch off in thefo llowing cases:
R too many electrical consumers are turned
on.
R thest ar ter battery is not suf ficiently charge d.
If th is is the case, the indicator lamps will flash
on the button for switching there frigerator box
on and off. The cooling function will auto mati‐
cally switch back on as soon as there is suf fi‐
cient voltage.
% Toinstallth ere frigerator box in the load
compartment or remo veit, please con tact a
qu alified specialist workshop. 15 0
Seats and stowing

Example:
vehicles with individual rear seats #
Vehicles with 5-seater variant: fold down the
re ar armrest. #
Pull the handle of stowage box 1and fold
down the co ver of stow age box 2. Example:
vehicles with individual rear seats #
Toopen: pullthe handle of refrigerator box
1 and fold down the co ver of there frigera‐
to r box. #
Toswitch on: press button 2repeatedly
until an indicator lamp (low cooling) lights up
or two indicator lamps (high cooling) light up. #
Toswitch off: press button 2repeatedly
until bo thindicator lamps go out. Wire
lesscharging of the mobile phone and
connection with theex terior aerial Note
s on wirelessly charging the mobile
phone &
WARNING Risk of inju rydue toobjects
being stowed inco rrectly
If objects in theve hicle interior are stowed
incor rectly, they can slide or be thrown
around and hit vehicle occupants. In addi‐
tion, cup holders, open stowage spaces and
mobile phone recep tacles cannot al ways
re tain all objects within.
There is a risk of injur y,particularly in the
ev ent of sudden braking or a sudden change
in direction. #
Alw aysstow objects so that they can‐
not be throw n around in su chsitua‐
tions. Seats and
stowing 151

Overview of
there ar operating unit 1
Sets thete mp erature, left
2 Sets the air distribution, left
3 Sets climate control toautomatic mode
(/ page 176)
4 Setting the air flow
5 Switches climate control on/off
(/ page 175)
Switches there sidual heat on/off
(/ page 178)
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
th ere ar operating unit, the multimedia sy stem
(/ page 176) or the MBUX rear tablet depend‐
ing on theve hicle's equipment. Operating
the clima tecont rol sy stem Switching clima
tecont rol on/off #
Toswitch on: setthe air flow toleve l 1 or
higher using theH button. #
Toswitch off: setthe air flow toleve l 0 using
th eH button.
If climate control is switched off, the windo ws
may mist up more quickl y.Switch climate con‐
trol off only brie fly. Switching
the clima tecont rol in there ar
on/off #
Press button 5.
% When clima tecontrol in the second seat row
is switched off, the indicator lamp is activa‐
te d and OFFis shown on there ar displa y. Switching
the A/C function on/off using the
air conditioning control panel The A/C function heats, cools and dehumidi
fies
th eve hicle's interior air. #
Press theÁ button.
Switch off the A/C function only brief ly;ot her‐
wise, the windo wsmay mist up more quickl y.
Condensation may drip from the underside of
th eve hicle when cooling mode is active. This is
not indicative of a fault. Calling up
the air conditioning menu Calling up
the air conditioning menu using
th e multimedia sy stem #
Select one of thete mp erature displa ysatthe
lo we r edge of the media displa y.
Calling up the air-conditioning menu using
th e but ton on the clima tecont rol panel #
Press theA button on the climate control
panel. Climate control
175

St
arting theve hicle with theke y in the
ma rked space (emer gency operation mode)
If th eve hicle does not start and thePlace the
key in the marked space See Owner's Manual
message appears in the multifunction displa y,
yo u can start theve hicle in emer gency operation
mode. #
Makesure that the mar ked space 2is
em pty. #
Remo vetheke y1 from theke yring. #
Place theke y1 inthe mar ked space 2
next tothe symbol 3.
The vehicle will start af ter a short time.
If yo ure mo vetheke y1 from the mar ked
space 2the engine continues running. For
fur ther vehicle starts ho wever,th eke y1
must be located in the mar ked space 2
next tothe symbol 3during the entire jour‐
ne y. #
Have theke y1ch ecked at a qualified spe‐
cialist workshop.
If th eve hicle does not star t: #
place theke y1 inthe mar ked space 2
and lea veitth ere. #
Depress the brake pedal and start theve hi‐
cle using thest art/ stop button.
% You can also swit chon the po wer supp lyor
th e ignition with thest art/ stop button. St
arting theve hicle via Remo teOnline serv‐
ices Cooling or heating
theve hicle interior before
commencing your journey
Ensure thefo llowing before starting the engine:
R the legal stipulations in the area where your
ve hicle is par ked allow engine starting via
smartphone.
R it is safe tostart and runth e engine where
yo ur vehicle is par ked.
R the fuel tank is su fficiently full.
R thest ar ter battery is suf ficiently charge d.
Charging thest ar ter battery be fore starting
th e jou rney
If th eve hicle battery is dischar ged, you can
re cei vea message on your smartphone. You can
th en start theve hicle with the smartphone to
ch arge the batter y.The vehicle is automatically
switched off af terte n minu tes. Driving and parking
18 9

R
The vehicle is set tooff-road le vel +1.
R When driving at speeds abo veappr oximately
80 km/h, theve hicle is lo wered.
R When driving at speeds below appr oximately
45 km/h, theve hicle is raised.
Individual suspension settings can be called up
in drive prog ram = (/page 203).
Dif fere nces between dif fere nt vehicle le vels
compared tothe normal le vel Ve
hicle
le vel Ve
hicles
without Off-
ro ad pac kage Ve
hicles with
Off-road pack‐
age
Car wash Appr ox.
+90 mm Appr
ox.
+90 mm
Off-road
le ve l +3 Una
vailable Appr ox.
+90 mm
Off-road
le ve l +2 Una
vailable Appr ox.
+60 mm Ve
hicle
le vel Ve
hicles
without Off-
ro ad pac kage Ve
hicles with
Off-road pack‐
age
Off-road
le ve l +1 Mercedes-
Maybach
vehi‐
cles: appr ox.
+50 mm
All other mod‐
els: appr ox.
+60 mm Appr
ox.
+30 mm
Spor tA pprox.
-15 mm App
rox.
-15 mm
Spo rt+A pprox.
-25 mm App
rox.
-25 mm If
th e entry /exit le vel function is activated, the
ve hicle is lo weredto the Sport + le velto facili‐
ta te entering/exiting theve hicle. When driving
at speeds of appr oximately 30 km/h or abo ve,
th e entry /exit le vel is deactivated and theve hi‐
cle is raised (/ page 268). Operation with a trailer or bicycle
rack
If th e electrical connection has been cor rectly
es tablished tothe trailer or bicycle rack:
R Drive program A,;, £,=,
C andB: theve hicle remains at nor‐
mal le vel ir respective of speed.
R Drive program FandG: theve hicle
adopts the normal le velst arting from a
speed of 30 km/h.
Sy stem limits
AIRMATIC may not be available or ha veonly limi‐
te dav ailability in thefo llowing cases:
R The overheating pr otection has been activa‐
te d due tofrequent le velch anges within a
short time. The Áwarning lamp appears
in the multifunction displa y.
Af terth e cooling phase, the sy stem is again
av ailable without restriction. 264
Driving and pa rking

#
Thoroughly clean the antif reeze from
component parts before starting the
ve hicle. *
NO
TEDama gecaused byincor rect cool‐
ant #
Only use coolant that has been pre‐
mixed with therequ ired antifreeze pro‐
te ction.
Information on coolant is available at thefo l‐
lowing locations:
R inthe Mercedes-Benz Specification for
Operating Fluids 310.1
- at https://be vo.mercedes-benz.com
- inthe Mercedes-Benz BeVo app
R at a qualified specialist workshop *
NO
TEOverheating at high outside tem‐
peratures If an inapp
ropriate coolant is used, the
engine cooling sy stem is not suf ficiently pro‐ te
cted against overheating and cor rosion at
high outside temp eratures. #
Alw ays use coolant appr ovedby
Mercedes-Benz. #
Obser vethe instructions in the
Mercedes-Benz Specifications for Oper‐
ating Fluids 310.1. Ha
ve the coolant regularly replaced at a qualified
specialist workshop.
Proportion of antifreeze concentrate in the
engine cooling sy stem:
R a minimum of 50% (antifreeze pr otection
down toappr oximately -37°C)
R a maximum of 55% (antifreeze pr otection
down to-45°C) Note
s on windscreen washer fluid Obser
vethe no tes on operating fluids
(/ page 417). &
WARNING ‑ Risk of fire and injury due to
windscreen washer concentrate
Wi ndsc reen washer concentrate is highly
fl ammable. It could ignite if it comes into
con tact wi thhot engine component parts or
th eex haust sy stem. #
Make sure that no windsc reen washer
concentrate spills out next tothefiller
opening. *
NO
TEDama getotheex terior lighting
due tounsuitable windsc reen washer
fl uid Uns
uitable windsc reen washer fluids may
damage the plastic sur face of theex terior
lighting. #
Only use windscreen washer fluids
which are also suitable for use on plas‐
tic sur faces, e.g. MB SummerFit or MB
Wi nterFit. Te
ch nical da ta425

R
theLOW RANGE off-road gear of the trans‐
fe r case is engaged
R thero ad sur face conditions and thus the
traction are good
A gradient climbing ability of 100% cor responds
to an incline of 45°.
Obse rveth e no tes on driving in mountainous ter‐
ra in (/ page194). Mo
del Maximumgra‐
dient climbing ability
Ve hicles without Off-
ro ad pac kage 80%
Ve hicles with Off-road
pac kage
When LOW RANGE off-
ro ad gear is engaged 10
0% Mercedes‑Maybac
hMaximumgra‐
dient climbing ability
All models 80% Tr
ailer hitch Gene
ral no tes on the trailer hit ch Modifications
tothe engine cooling sy stem may
be necessar y,depending on theve hicle model.
The retrofitting of a trailer hitch is only pe rmissi‐ ble if a
towing capacity is specified in your vehi‐
cle documents.
Fu rther information can be obtained at a quali‐
fi ed specialist workshop. 430
Tech nical da ta