2020 MERCEDES-BENZ GLS SUV service

The
recommended octane number foryo ur vehi‐
cle can also be found on the instruction label in
th e fuel filler flap (/ page211).
As a temp orary measure, if there commended
fuel is not available, you may also use regular
unleaded petrol with at least 91RON. This may
re duce engine output and increase fuel con‐
sum ption.
Ne verre fuel using petrol with an even lo wer
RO N.
Fu rther information on fuel can be obtained at a
fi lling station or a qualified specialist workshop.
Information on additives in petrol
Obser vethe no tes on operating fluids
(/ page 417).
* NO
TEDama gefrom use of unsuitable
additives Even small amounts of
the wrong additive
may lead tomalfunctions occur ring. #
Only add cleaning additives recommen‐
ded byMercedes-Benz tothe fuel. Mercedes-Benz
recommends that you use
brand-name fuels with additives.
In some count ries, the fuel available may not
ha ve suf ficient additives. Residue could build up
in the fuel injection sy stem as a result. In this
case, in consultation with a Mercedes-Benz
service centre, mix the fuel with the cleaning
additive recommended byMercedes-Benz.
Obser vethe no tes and mixing ratios indica ted
on theta nk.
In fo rm ation on fuel grades forve hicles with
a diesel engine
Gene ral no tes
Obser vethe no tes on operating fluids
(/ page 417). &
WARNING Risk offire from fuel mixture
If yo u mix diesel fuel with petrol, theflash
point of the fuel mixture is lo werth an that of
pure diesel fuel. #
Neverre fuel using petrol in diesel
engines. #
Never mix petrol with diesel fuel. *
NO
TEDama gecaused bythe wrong fuel Even small amounts of
the wrong fuel could
re sult in damage tothe fuel sy stem, the
engine and the emission control sy stem. #
Only refuel using sulphu r-free diesel
fuel that con form sto European stand‐
ard EN 590, or an equivalent specifica‐
tion.
In countries without sulphur-f ree diesel
fuel, refuel using only lo w-sulphur diesel
fuel with a sulphur content less than
50 ppm.
Ne verre fuel with one of thefo llowing fuels:
R petrol
R marine diesel
R heating oil
R pure bio-diesel fuel or vege table oil
R paraf fin or kerosene
If yo u ha veacciden tally refuelled with the
wrong fuel: #
Do not swit ch the ignition on. 420
Tech nical da ta

*
NO
TEEngine dama gecaused byan
incor rect oil filter, incor rect oil or addi‐
tives #
Do not use engine oils or oil filters
which do not cor respond tothe specifi‐
cations explicitly prescribed forthe
service inter vals. #
Do not alter the engine oil or oil filter in
order toachie velonger change inter vals
th an presc ribed. #
Do not use additives. #
Have the engine oil rene we d at regular
inter vals. Mercedes-Benz
recommends that you ha vethe
oil change car ried out at a qualified specialist
wo rkshop.
Only use engine oils appr oved byMercedes-
Benz.
Pe trol engines: for cer tain countries, dif fere nt
engine oils can be used in conjunction wi th
re duced maintenance inter vals.
% Further information on dif fere nt engine oils
can be ob tained at a qualified specialist
wo rkshop.
Quality and capacity of engine oil Pe
trol engine sM B-Freigabe or MB-
Appr oval
GLS 450 4MATIC 229.5 1,229.52,
229.61
229.71*
GLS 580 4MATIC 229.52
229.61* Mercedes‑Maybac
hMB-Freigabe or MB-
Appr oval
EU countries:
Mercedes-Mayba ch
GLS 600 4MATIC 229.5*
229. 51
No n-EU countries:
Mercedes-Maybach
GLS 600 4MATIC 229.5 Diesel engines MB-Fr
eigabe or MB-
App roval
All model s2 29.52
229.61* *
re commended for lo west possible fuel con‐
sum ption (lo westSA E viscosity class in ea ch
case; obser vepossible restrictions of the
appr ovedSA E viscosity classes)
To achie vethe lo west possible fuel consum ption,
it is recommended touse the engine oil specifi‐
cations mar ked in theta ble forth e lo west SAE
viscosity class. Possible restrictions of the Te
ch nical da ta423

Display messages
Int
roduction In
fo rm ation about display messages
Displ aymessa ges appear on the multifunction
displa y.
Displ aymessa ges with graphical symbols are
simplified in the Owner's Manual and may dif fer
from the symbols on the multifunction displa y.
The multifunction display sho wshigh-priority dis‐
play messages in red. Cer tain display messages
are accompanied byawa rning tone.
Please act in acco rdance with the display mes‐
sages and follow the additional no tes in the
Owner's Manual.
Fo r some display messa ges, a symbol will also
be shown:
R Õ Further information
R ¨ Hide display message
Wi th th e left-hand Touch Control, you can select
th ere spective symbol byswiping tothe left or
ri ght. Press theÕ symbol toshow fur ther infor‐ mation on
the media displa y.Press the¨
symbol tohide the display message.
Yo u can hide lo w-priority display messages by
pressing theP back button or the left-hand
To uch Control. The displ aymessa ges will then
be stored in the message memor y.
Re ctify the cause of a display message as
qu ickly as possible.
High-priority display messages cannot be hid‐
den. The multifunction display sho wsthese dis‐
play messages continuously until the cause of
th e display message has been rectified.
Calling up sa ved displ aymessages
On-boa rdcompu ter:
4 Service 5
1 message
If th ere are no display messages, No messages
will appear on the multifunction displa y. #
Scroll thro ugh the display messages byswip‐
ing upwards or down wards on the left-hand
To uch Control. #
Toexitth e message memor y:press the
back button P. Display messages and
warning/indicator lamps 433

Display messages
Possible causes/consequences and M
MSolutions #
Add coolant (/ page 362). #
Have the engine cooling sy stem checked at a qualified specialist workshop.
ÿ
Coolant Stop vehicle
Switch engine off *T
he coolant is too hot. #
Stop theve hicle immediately in accordance with the traf fic conditions and switch off the engine. &
WARNING Danger of bu rns when opening the bonn et
If yo u open the engine bonn etwhen the engine has overheated or during a fire inthe engine compartment, you
could come into contact wi thhot gases or other escaping operating fluids. #
Before opening the bonn et, allow the engine tocool down. #
Intheeve nt of a fire inthe engine compartment, keep the engine bonn etclosed and call thefire service. #
Wait until the engine has cooled down. #
Make sure that the air supply tothera diator is not obstructed. #
Avoiding high loads on the engine, drive tothe nearest qualified specialist workshop. In doing so, ensure that
th e coolant temp erature display remains below 120°C.
ÿ *T
hefan mo tor is defective. #
Avoiding high loads on the engine, drive tothe nearest qualified specialist workshop. In doing so, ensure that
th e coolant temp erature display remains below 120 °C. Displ
aymessa ges and warning/indicator lamps 451

Engine
Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
ÿ Coolant warning lamp (red) *T
he red coolant warning lamp is lit while the engine is running.
Po ssible causes:
R The temp erature sensor is malfunctioning
R The coolant le vel is too low
R The air supply tothera diator is obstructed
R The radiator fan is faulty
R The engine coolant pump is faulty
If th ere is an additional warning tone, the coolant temp erature has exceeded 120°C. &
WARNING Danger of bu rns when opening the bonn et
If yo u open the engine bonn etwhen the engine has overheated or during a fire inthe engine compartment, you
could come into contact wi thhot gases or other escaping operating fluids. #
Before opening the bonn et, allow the engine tocool down. #
Intheeve nt of a fire inthe engine compartment, keep the engine bonn etclosed and call thefire service. #
Stop theve hicle immediately in accordance with the traf fic conditions and switch off the engine. Do not continue
driving. #
Notethe messages on the multifunction displa y. Displ
aymessa ges and warning/indicator lamps 495

Sy
stem limitations................................. 288
Ac tive Se rvice Sy stem PLUS
see AS SYST PLUS
Ac tive Speed Limit Assi st
Displ ay................................................... 241
Fu nction................................................. 241
Ac tive Steering Assist
Ac tivating/deactivating......................... 24 8
Ac tive Emergency Stop Assis t............... 24 8
Fu nction................................................ 24 6
Sy stem limits.........................................2 46
Ac tive Traf fic Jam Assist
Ac tivating/deactivating......................... 24 4
Fu nction................................................ 24 3
Ad aptive brake lights................................ 231
Ad aptive cruise control
see Active Dis tance Assi stDISTRONIC
Ad aptive functions, MULTIBEAM LED
see Intelligent Light Sy stem
Ad aptive Highbeam Assist Plus
Fu nction................................................. 161
Switching on/of f................................... 16 2Ad
Blue ®
Ad ditives................................................ 421
Capacity................................................ 422
No tes..................................................... 214
Purity..................................................... 421
To pping up............................................. 215
Ad ditional cushion
Leg rest.................................................. 11 2
Re ar head restra int................................ 11 9
Ad ditional door lo ck.................................... 81
Ad diti ves
Ad Blue ®
................................................. 421
Engine oil.............................................. 422
Fu el....................................................... 420
Ad diti ves (AdBlue ®
)
see AdBlue ®
Ad diti ves (engine oil)
see Additives
Ad diti ves (fuel)
see Fuel
ADS PLUS damping sy stem
see AIRMATIC Af
ter-sales service centre
see ASS YST PLUS
Air conditioning menu Calling up............................................... 175
Air distribution Setting................................................... 174
Setting (MBUX multimedia sy stem)........ 176
Air freshener sy stem
see Frag rance sy stem
Air inlet see Air-water duct
Air pressure see Tyre pressure
Air suspension see AIRMATIC
Air vents
Ad justing (front).................................... 184
Ad justing (rear)..................................... .184
Glo vebox.............................................. 186
Air vents
see Air vents
Ai r-conditioning sy stem
see Climate control Index
507

Air-recirculation mode..............................
17 7
Air-water duct Keeping free.......................................... 364
Airbag Activation................................................ 40
Cushionbag............................................. 45
Fr ont airbag (driver, front passenger)...... 45
Ins tallation locations.............................. .45
Knee airbag............................................ .45
Overview................................................. 45
PA SSENGER AIR BAG indicator lamp....... 50
Pr otection................................................ 46
Re duced pr otection.................................47
Side airba g.............................................. 45
Wi ndow airba g......................................... 45
Ai rflow
Setting................................................... 174
AIRM ATIC
Setting.................................................. .265
Suspension........................................... 262
Alarm sy stem
see ATA (anti-theft alarm sy stem)
All-wheel drive see 4MATIC Ambient lighting
Setting (multimedia sy stem)..................1 64
Android Auto
see Smartphone integration
Animals Pets in theve hicle................................... 77
Anti-lock braking sy stem
see ABS (Anti-lock Braking Sy stem)
Anti-skid chains
see Snow chains
Anti-theft pr otection
Ad ditional door loc k................................ .81
Immobiliser........................................... 102
Anticipatory occupant pr otection
see PRE- SAFE®
(anticipatory occu‐
pant pr otection)
see PRE-SAFE ®
PLUS (anticipatory
occupant pr otection plus)
Apple CarPlay ®
see Smartphone integration
Assistance sy stems
see Driving saf ety sy stem ASS
YST PLUS
Battery disconnection pe riods.............. 358
Displaying the service due dat e............. 357
Fu nction/no tes..................................... 357
Re gular maintenance work.................... 357
Special service requ irements................ 357
ATA (anti-theft ala rmsystem)
Deactivating the alarm.......................... 103
Fu nction................................................ 102
Fu nction of interior pr otection............... 103
Priming/deactivating interior pr otec‐
tion........................................................ 104
Priming/deactivating tow- aw ay pro‐
te ction................................................... 103
To w- aw ay protection function................1 03
AT TENTION ASSI ST
Fu nction................................................ 232
Setting................................................... 233
Sy stem limitations................................. 232
At tention assistant
see ATTENTION ASSIST
Au thorised workshop
see Qualified specialist workshop 508
Index

D
Dashboa rd
see Cockpit
Data acquisition Vehicle.................................................... 34
Data pr otection rights
Data storage............................................ 38
Data storage
Data pr otection rights............................. 38
Electro nic control units........................... 34
Online service s........................................ 37
Ve hicle.................................................... 34
Deactivating the alarm (A TA ).................... 103
Deale rship
see Qualified speciali stwo rkshop
Declaration of conformity Electromagnetic compatibility.................26
Jack......................................................... 30
Specific absor ption rate.......................... 26
TIREFIT kit............................................... 31
Wi reless vehicle components.................. 26
Decorative foil (cleaning instructions) .... 368DeNOx agent
see AdBlue ®
De stination entry
En tering a POI or address...................... 326
De tecting inat tentiveness
see ATTENTION ASSIST
Diagnostics connection ..............................31
Diesel Low outside temp eratures..................... 420
No tes....................................................4 20
Digital Owner's Manual .............................. 20
Dinghy towing
see Tow- bar sy stem
Dipped beam Setting................................................... 16 2
DIRECT SELECT le ver
Engaging drive position......................... 206
Engaging neutral................................... 205
Engaging pa rkposition.......................... 206
Enga ging park position automatically....2 06
Engaging reve rsege ar........................... 205
Fu nction................................................ 204
Displ ay(care) ............................................ .370 Display (MBUX multimedia sy
stem)
Home screen........................................ .312
Display (multimedia sy stem)
Operating.............................................. .313
Display (on-boa rdcompu ter)
Displ ays on the multifunction displa y.... 308
Displ aymessage
Calling up (on-board compu ter)............. 433
No tes....................................................4 33
Display messages ¯ - - - km/h ...................................... 461
ç - - - km/h ..................................... 462
È - - - km/h ...................................... 461
# 12V battery See Owner's Man‐
ual......................................................... 479
Û 48 V battery See Owner's Man‐
ual......................................................... 480
: Active Light Sy stem inoperative... 440
¯ AdBlue sy stem fault Emer. op.:
max. XXX km/h Start not poss. in
XXX km................................................. .487 Index
513