engine MERCEDES-BENZ GLS SUV 2021 Owner's Guide

R
the lateral inclination of theve hicle in
deg rees (°)
R the cur rently achie ved score forth e ongo-
ing trip
R a tip forth e upcoming driving manoeuvre #
T
To st
o st op t
op t he display
he display: :select End trip .
An evaluation of the trip is displa yed. It sho ws
th e achie ved score and a message, forex am-
ple Great job! . A A
ut ut omatic tr
omatic tr ansmission
ansmission DIRECT SELECT lev
DIRECT SELECT lev
er
erF
F
unction of t
unction of t he DIRECT SELECT lev
he DIRECT SELECT lev er
er&
W
WARNING
ARNING Risk of accident due toincor-
re ct gearshiTing
If th e engine speed is higher than the idle
speed and you engage the transmission posi-
tion hork, theve hicle may accelerate
sharpl y. #
Ifyo u engage the transmission position
h ork when theve hicle is at a stand- still, alw
ays depress the brake pedal
/rmly and do not accelerate at the same
time. &
W
WARNING
ARNING Risk of accident and injury due
to leaving children unattended in theve hi-
cle
If ch ildren are leT unattended in theve hicle,
th ey could, in particular:
R open doors, thereby endangering other
persons or road users.
R get out and be struck byoncoming tra1c.
R operate vehicle equipment and become
trapped, forex ample.
In addition, thech ildren could also set the
ve hicle in motion by,fo rex ample:
R releasing the parking brake.
R changing the transmission position.
R starting theve hicle. #
Never lea vechildren unattended in the
ve hicle. #
When leaving theve hicle, alw aysta ke the
ke y with you and lock theve hicle. #
Keep theve hicle key out of there ach of
ch ildren. Use
the DIRECT SELECT le verto switch the trans-
mission position. The cur rent transmission posi-
tion is displa yed in the inst rument displa y. Driving and parking
209
209

Pa
rk position jis engaged automatically if one
of thefo llowing conditions is met:
R You switch the stationary vehicle o. in trans-
mission position hork.
R You open the driver's door when theve hicle is
at a standstill or when driving at a very low
speed and the transmission position is hor
k.
R When theve hicle is rolling, you switch if o. in
transmission position hork and bring it to
a standstill.
R You switch o. the engine, bring theve hicle to
a standstill and open the driver's door when
th eve hicle is stationary or when theve hicle is
ro lling and the transmission position is i.
R Engaging park position jautomatically is
re qu ired bytheve hicle.
% Tomanoeuv rewith an open driver's door,
open the driver's door while at a standstill and
engage transmission position hork again. Eng
Eng aging dr
aging dr iv
ive position D
e position D #
Depress the brake pedal and push the DIRECT
SELECT le ver down past the /r stpoint of
re sis tance.
When the automatic transmission is in transmis-
sion position h, it shiTsthege ars automaticall y.
This depends, among other things, on thefo llo w-
ing factors:
R The selected drive prog ram
R The position of the accelerator pedal
R The driving speed Manual
Manual
g
gear
ear shiTing
shiTing P
P
er
er manent se
manent se tting (v
tting (vehicles wit
ehicles wit h
hO.-R
O.-R oad
oadpack-
pac k-
ag
ag e or E-A
e or E-A CTIVE BOD
CTIVE BOD Y C
Y CONTR
ONTR OL)
OL)
* NO
NOTE
TEMercedes-AMG vehicles #
Obser vethe no tes in the Supplement.
Yo u could otherwise failto recognise
dangers. #
A Activ ctiv ating/deactiv
ating/deactiv ating:
ating:Pullrock er switch 1.
If indicator lamp is lit, manual shiTing is acti-
va ted. The cur rent gear is displ ayed inthe
inst rument displa y. Driving and parking
211 211

T
T
em
em por
por ar
ary se
y se tting
tting #
T
To activ
o activ at
ate:
e: Pull steering wheel gearshiT pad-
dle 1 or2.
Manual shiTing is activated for a short time.
Tr ansmission position pand the cur rent gear
appear in the inst rument displa y. #
T
To deactiv
o deactiv at
ate:
e: Pull steering wheel gearshiT
paddle 2and hold it in place.
Tr ansmission position happears in the
inst rument displa y.
% Topermanently shiT thege ars manually in
drive prog ram = usingthe steering wheel
ge arshiT paddles, select thep setting for
th e transmission. ShiTing
ShiTing #
T
T o
o shiT
shiT up:
up:Pull steering wheel gearshiT pad-
dle 2. #
T
T o
o shiT
shiT do
down:
wn: Pull steering wheel gearshiT
paddle 1. Gear
Gear
shiT
shiT r
recommendation
ecommendation The
gearshiT recommendation assists you in
adopting an economical driving style. #
Ifth ege arshiT recommendation 1appears
next tothe transmission position displa y,shiT
to there commended gear. Using kic
Using kic
kdo
kdown
wn #
Maximum acceler
Maximum acceler ation:
ation:depress the accelera-
to r pedal be yond the pressure point.
To protect against engine overrev ,th e automatic
transmission shiTs up tothe next gear when maxi-
mum engine speed has been reached. Glide mode function
Glide mode function
*
N
NOOTE
TE Mercedes-AMG vehicles #
Obser vethe no tes in the Supplement.
Yo u could otherwise failto recognise
dangers. %
Mer
Mercedes-Ma
cedes-Ma ybac
ybach v
h vehicles:
ehicles: the Glide mode
function is not available.
Wi th an anticipatory driving st yle, Glide mode
helps youto reduce fuel consum ption.
Glide mode is characterised bythefo llowing:
R The combustion engine is disconnected from
th e driv etra in and continues torun in neutral. 212
212
Driving and parking

R
The transmission position display his sh own
in green.
R V
V ehicles wit
ehicles wit h 48 V on-boar
h 48 V on-boar d electr
d electrical syst
ical syst em:
em:
th e combustion engine can be switched o..
All of theve hicle functions remain active.
Glide mode is activated if thefo llowing conditions
are met:
R Drive prog ram ; is selected.
R The speed is within a suitable range.
R The road's cou rse is suitable, e.g. no steep
uphill or downhill inclines or tight bends.
R There is no trailer hitched up tothe trailer
hitch, and no bicycle rack Fitted.
R You do not depress the accelerator or brake
pedal (e xcept for light brake applications).
% Glide mode can also be activated if you ha ve
selected the "Eco" setting forth e drive in the
drive prog ram =.
Glide mode is deactivated again if one of the con-
ditions is no longer met. Glide mode can also be pr
evented bythefo llowing
parame ters:
R Incline
R Downhill gradient
R Temp erature
R Height
R Speed
R Operating status of the engine
R Tra1c situation T T
r
ransf
ansf er case
er case F
F
unction of t
unction of t he tr
he transf
ansfer case
er case &
W
WARNING
ARNING Risk of skidding and having an
accident when in LOW RANGE on slippery
ro ad sur faces
The wheels can block and thus lose traction
on slippery road sur faces, particular lyin the
fo llowing situations:
R ifyo ure lease the accelerator pedal when
th eve hicle is in motion.
R if o.-road ABS inter venes when braking. #
Never select theLO W RANGE o.- road
ge ar when driving on slippery road sur fa-
ces. &
W
WARNING
ARNING Risk of accident when the
transfer case is in neutral position
The vehicle may rollawa y unin tentionally if you
do not wait until the transfer case shiT opera-
tion is comple te. Driving and parking
213
213

#
Wait until the transfer case shiT opera-
tion is comple te.This function is only
available in vehicles with O.-
ro ad pac kage.
ShiT the transfer case tothe on-road position
HIGH RAN
HIGH RAN GE
GEor into the LLO
O W RAN
W RAN GE
GEo.-road
ge ar.
Do not switch o. the engine during shiT operation
and do not shiT the automatic transmission to
ano ther position.
ShiT
ShiT r
rang
ang es
es
R HIGH RAN
HIGH RAN GE:
GE: Road position for all normal on-
ro ad driving situations
R LO
LOW RAN
W RAN GE:
GE:O.-road gear for driving o.-
ro ad, when ford ing and on steep uphill or
downhill inclines
Properties of theLO W RANGE o.- road gear:
R reduced maximum permissible speed:
50 km/h
R increased tractive po wer R
changing the transmission ratio byafa ctor of
about three
R increased drive torque
Do not use LOW RANGE in thefo llowing situa-
tions:
R when driving on public roads. ShiTing
ShiTing
t
the tr
he tr ansf
ansfer case
er case ShiTing ShiTing
t to t
o t he LO
he LOW RAN
W RAN GE
GEo.-r
o.-r oad
oad g
gear
ear Re
quirements:
R You are not driving on a pa ved or public road.
R The vehicle is stationar y.214
214
Driving and parking

#
Pull the LLO
O W RAN
W RAN GE
GE1 rock er switch.
Indicator lamp 2will 0ash. The shiT requ est
st ay s active for a maximum of 30 seconds. If
all requ irements for shiT operation are not ful-
/lled within this time, the indicator lamp 2
switches o. again and the shiT operation
must be star ted again. #
ShiT the transmission toposition i.
If shiT operation is successful, the message
LOW RANGE on appears inthe instrument
cluster, an audible signal sounds and indicator
lamp 2and an indicator lamp in the inst ru-
ment clus ter light up continuousl y.#
ShiT the transmission toposition h.
% Ifyo u switch o. theve hicle in LOW RANGE, it
re mains in LOW RANGE the next time you
start the engine.
% You will not be able toswitch on LOW RANGE
if drive prog ram C orB is switched on.
The vehicle switches todrive prog ram A. In t
In t he on-r
he on-r oad position,
oad position, shiT
shiTt
to HIGH RAN
o HIGH RAN GE
GE
Re quirements:
R The vehicle is star ted and you are not driving
fa ster than 50 km/h. #
Pull the LLO
O W RAN
W RAN GE
GE1 rock er switch.
The shiT requ est st ays active for a maximum
of 30 seconds. If all requ irements for shiT
operation ha venot been ful/lled within this
time, shiT operation must be star ted again. #
ShiT the transmission toposition i.
If shiT operation is successful, the message
LOW RANGE off appears inthe inst rument
cluster, an audible signal sounds and the indi-
cator lamps go out. #
ShiT the transmission toposition h. F
F
unction of t
unction of t he 4MA
he 4MATIC
TIC
4MATIC ensures that all four wheels are driven.
To get her with ESP ®
and 4ETS, 4MATIC impr oves
th e traction of your vehicle whene ver a driven
wheel spins due toinsu1cient traction. Yo
u can display the cur rent distribution of drive
to rque s on all four wheels in the head-up display
and in theright-hand display range of the inst ru-
ment display . The higher there specti vescale is
/lled, the higher the cor responding drive torque
is.
If yo ufa ilto adapt your driving style, 4MATIC can
neither reduce therisk of an accident nor override
th e la wsof ph ysics. 4MATIC cannot take account Driving and parking
215 215

of
road, weather and tra1c conditions. 4MATIC is
only an aid. You are responsible especially for
maintaining a safe distance from theve hicle in
front, forve hicle speed, for braking in good time
and for st aying in lane.
% In wintry road conditions, the maximum e.ect
of 4MATIC can be achie ved only if you use
winter tyres (M+S tyres), with snow chains if
necessar y. R
R
efuelling
efuelling R
R
efuelling t
efuelling t he v
he vehicle
ehicle &
W
WARNING
ARNING Risk of /re or explosion from
fuel
Fu els are highly 0ammable. #
Fire , naked 0ames, smoking and creating
spar ksmust be avoided. #
Before refuelling, switch o. theve hicle
and, if /tted, the stationary heater and
ke ep switched o. during /lling. &
W
WARNING
ARNING Risk of injury from fuels
Fu els are poisonous and hazardous toyour
health. #
Do not swallow fuel or let it come into
contact with skin, eyes or clo thing. #
Do not inhale fuel vapour. #
Keep children away from fuel. #
Keep doors and windo wsclosed during
th ere fuelling process.
If yo u or other people come into contact with
fuel, obser vethefo llowing: #
Immediate lyrinse fuel o. your skin with
soap and water. #
If fuel comes into contact with your eyes,
immediately rinse them thoroughly with
clean water. Seek medical at tention
immedia tely. #
Ifyo u swallow fuel, seek medical atten-
tion immediatel y.Do not induce vomit-
ing. #
Change immediately out of clo thing that
has come into contact with fuel. &
W WARNING
ARNING Risk of /re and explosion due
to electrostatic charge
Electrostatic charge can ignite fuel vapour. #
Before you open the fuel /ller cap or
ta ke hold of the pump nozzle, touch the
me tallic vehicle body. #
Toavo id creating ano ther electrostatic
ch arge , do not get into theve hicle again
during there fuelling process. &
W
WARNING
ARNING Risk of /re from fuel mixture
Ve hicles with a diesel engine:
If yo u mix diesel fuel with petrol, the 0ash
point of the fuel mixture is lo werth an that of
pure diesel fuel.
While theve hicle is running, component parts
in theex haust system may overheat without
wa rning. 216 216
Driving and parking

#
Neverre fuel using petrol. #
Never mix petrol with diesel fuel. *
N
NO OTE
TE Damage caused bythe wrong fuel Ve
hicles with a petrol engine:
Even small amounts of the wrong fuel could
re sult in damage tothe fuel system, the
engine and the emission control system. #
Only refuel using unleaded, sulphur-free
spar k-ignition engine fuel that conforms
to European EN 228, or an equivalent
speci/cation.
Fu el of this speci/cation may contain up to
10% ethanol. Your vehicle is suitable for use
with E10 fuel.
Ne verre fuel wi thone of thefo llowing fuels:
R Diesel
R Regular petrol with an octane number
lo we rth an 91 RON R
Petrol with more than 10% ethanol byvol-
ume, e.g. E15, E20, E85, E100
R Petrol with more than 3% me thanol byvol-
ume, e.g. M15, M30
R Petrol with additives containing me tal
If yo u ha veacciden tally refuelled wi th the
wrong fuel: #
Do not switch on theve hicle. #
Consult a quali/ed specialist workshop. *
N NOOTE
TE Damage caused bythe wrong fuel Ve
hicles with a diesel engine:
Even small amounts of the wrong fuel could
re sult in damage tothe fuel system, the
engine and the emission control system. #
Only refuel using sulphur-free diesel fuel
th at conforms toEuropean standard
EN 590, or an equivalent speci/cation.
In count ries without sulphur-free diesel
fuel, refuel using only lo w-sulphur diesel fuel with a sulphur content less
than
50 ppm.
Ne verre fuel wi thone of thefo llowing fuels:
R Petrol
R Marine diesel
R Heating oil
R Pure bio-diesel or vege table oil
R Para1n or kerosene
If yo u ha veacciden tally refuelled wi th the
wrong fuel: #
Do not switch on theve hicle. #
Consult a quali/ed specialist workshop. *
N
NOOTE
TE Do not use diesel torefuel vehicles
with a petrol engine If
yo u ha veacciden tally refuelled wi th the
wrong fuel:
R Do not switch on theve hicle. Otherwise
fuel can enter the engine. Driving and parking
217 217

Even small amounts of
the wrong fuel
could result in damage tothe fuel system
and the engine. The repair costs are high. #
Consult a quali/ed specialist workshop. #
Have the fuel tank and fuel lines drained
comple tely. *
N
NO
OTE
TE Do not use petrol torefuel vehicles
with a diesel engine If
yo u ha veacciden tally refuelled wi th the
wrong fuel:
R Do not switch on theve hicle. Otherwise,
fuel can enter the fuel system.
Even small amounts of the wrong fuel
could result in damage tothe fuel system
and the engine. The repair costs are high. #
Consult a quali/ed specialist workshop. #
Have the fuel tank and fuel lines drained
comple tely. *
N NO
OTE
TE Damage tothe fuel system due to
ove r/lling the fuel tank #
Only /ll the fuel tank until the pump noz-
zle switches o..
If to o much fuel has been added due, for
ex ample, toafa ulty /lling pump: #
Do not switch on theve hicle. #
Consult a quali/ed specialist workshop. *
N
NOOTE
TE Fuel may spr ayout when you
re mo vethe fuel pump nozzle #
Only /ll the fuel tank until the pump noz-
zle switches o.. R
R
eq
eq uir
uir ements:
ements:
R The vehicle is unloc ked.
% Do not getinto theve hicle again during the
re fuelling process. Othe rwise, electrostatic
ch arge could build up again.
Obser vethe no tes on operating 0uids and fuel. The
recommended octane number foryo ur vehi-
cle can be found on the information label in the
fuel /ller 0ap. 1
Fuel /ller 0ap
2 Brac ketfo r fuel /ller cap
3 Fuel type
4 QR code forre scue card
5 Tyre pressure table 218
218
Driving and parking

#
Press on the back area of fuel /ller 0ap 1.#
Turn the fuel /ller cap anti-clockwise and
re mo veit. #
Insert fuel /ller cap from abo veinto brac ket
2 . #
Comple tely insert the pump nozzle into the
ta nk /ller nec k,hook in place and refuel. #
Only /ll the fuel tank until the pump nozzle
switches o..
% V
Vehicles wit
ehicles wit h a diesel engine:
h a diesel engine: theta nk /ller
neck is designed forre fuelling at diesel /lling
pumps.
% V
V ehicles wit
ehicles wit h a diesel engine:
h a diesel engine: whenthe fuel
ta nk is comple tely em pty, top up with at least
5 litres of diesel.
% V
Vehicles wit
ehicles wit h a diesel engine:
h a diesel engine: use a /ller neck
with a lar gediame terfo rve hicles with a diesel
engine when topping up fuel from a fuel can.
Otherwise, the /ller neck cannot slide into the
ta nk. #
Replace the cap on the /ller neck and turn
clockwise until it engages audibl y. #
Close fuel /ller 0ap 1. A
A
dBlue
dBlue ®
®
(v
(vehicles wit
ehicles wit h a diesel engine onl
h a diesel engine onl y)
y) N
No
ot
tes on
es on r
re/lling
e/lling A
AdBlue
dBlue ®
®
Ad Blue ®
is a water-soluble 0uid forth e NOx
ex haust gas aTertreatment of diesel engines. In
order forth eex haust gas aTertreatment tofunc-
tion proper ly, only use AdBlue ®
in acco rdance
with ISO 22241.
Ad Blue ®
is ch aracterised bythefo llowing:
R non-t oxic
R colourless and odourless
R non-0ammable
If yo u open theAd Blue ®
tank, small amounts of
ammonia vapour may be released. Only /ll the
Ad Blue ®
tank in well-ventilated areas.
Do not let AdBlue ®
come into contact wi thskin,
ey es or clo thes. Keep AdBlue ®
awa y from chil-
dren.
Do not ingest AdBlue ®
. If AdBlue ®
is swallo wed,
immediately rinse your mouth out thoroughl y. Drink plenty of
water. Seek medical at tention at
once.
Obser vethe no tes on operating 0uids
(/ page 425).
Ad Blue ®
is available here:
R AdBlue ®
can be topped up byfast service at a
quali/ed specialist workshop, e.g. a
Mercedes-Benz Se rvice Centre.
R AdBlue ®
is available at many /lling stations
from AdBlue ®
/lling pumps.
R Alternati vely,Ad Blue ®
is available at quali/ed
specialist workshops, e.g. Mercedes-Benz
Se rvice Centres, and at many /lling stations in
Ad Blue ®
re/ll canis ters or AdBlue ®
re/ll bot-
tles.
% Ensure the connection between there /ll con-
ta iner and vehicle /ller neck does not drip. Driving and parking
219 219