2019 MERCEDES-BENZ GLS SUV engine coolant

Display messages
Possible causes/consequences and M
MSolutions
? *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.
#
See Owner's Manual *T
he battery is not being charge d.
* NO
TEPossible engine damage if you continue driving #
Do not continue driving under any circum stances. #
Consult a qualified specialist workshop. #
Stop theve hicle immediately, paying attention toroad and traf fic conditions, and switch off the engine. #
Consult a qualified specialist workshop.
# Stop vehicle See Owner's
Manual *T
he battery is no longer being charge d and the battery charge leve l is too lo w.
* NO
TEPossible engine damage if you continue driving #
Do not continue driving under any circum stances. #
Consult a qualified specialist workshop. #
Pull over and stop theve hicle safely as soon as possible, paying attention toroad and traf fic conditions. Do not
continue driving under any circums tances. #
Switch off the engine. 638
Display messages and warning/indicator lamps

Wa
rning and indicator lamps Overview of
warning and indicator lamps Some sy
stems will per form a self-test when the
ignition is switched on. Some warning and indi‐
cator lamps may brief lylight up or flash. This
behaviour is non-critical. These warning and indi‐
cator lamps indicate a malfunction only if they
light up or flash af terth e engine has been star‐
te d or during a journe y.
Instrument display Depending on
the display setting, the positions
of the indicator lamps on the instrument display
may dif fer from theex ample shown.
Wa rning and indicator lamps:
L Low beam(/
page157)
T St
anding lights(/ page157)
K High beam(/
page158)
#! Tu
rn signal lights( /page 158)
R Re
ar fog light(/ page157)
6 Re
stra int sy stem(/ page 666)
ü Seat belt not
fastened(/ page671)
J Brakes (yellow)(/
page 666)
J Brakes (red)(/
page 666)
! Electric pa
rking brake (yellow)
(/ page 666)
! Electric parking brake (red)
(/
page 666)
! ABS malfunction(/
page 666)÷
ESP®
(/ page 666)
å ESP®
OFF(/ page 666)
L Distance warning(/ page672)
Ù Powe r-assis tedsteering malfunc‐
tion(/ page677)
ä AIRMATIC/E- ACTIVE BODY CON‐
TROL malfunction (/ page672)
+ Off-road
gear (/ page210)
Ì On-road position (/ page 210)
; Engine diagnostics(/
page 673)
% Preglow
# Electrical
fault( / page 673)
8 Fu
elreser vewith fuel filler cap loca‐
tion indicator(/ page673)
? Coolant
too hot/cold(/ page673)
h Ty
re pressure monitor( /page 675)
ï Tr
ailer hit chis not operational or is
swiveling(/ page677) Displ
aymessa ges and warning/indicator lamps 665

Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
? Coolant warning lamp The
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
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, paying attention toroad and traf fic conditions, and switch off the engine. Do not con‐
tinue driving under any circums tances. #
Obser vethe messages on the multifunction displa y.
If th e coolant temp erature display is at the lo wer end of thete mp erature scale: #
Consult a qualified specialist workshop. 674
Displaymessa ges and warning/indicator lamps

Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
or #
Exit theve hicle and keep a safe dis tance from it until the engine has cooled down. #
Check the coolant le vel (/ page 536). #
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 the
coolant temp erature display remains below 120 °C. Ty
res Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions
h Ty re pressure monitoring
sy stem warning lamp lights
up The
yellow tyre pressure monitoring sy stem warning lamp (pressure loss/malfunction) is lit.
The tyre pressure monitoring sy stem has de tected tyre pressure loss in at least one of the tyres. &
WARNING Risk of an accident due toinsuf ficient tyre pressure
Ty res with insuf ficient tyre pressure pose thefo llowing risks:
R The tyres may bur st, especially as the load and vehicle speed increase.
R The tyres may wearexc essively and/or une venly, which may greatly impair tyre traction.
R ‑ The driving characteristics, steering and braking may be greatly impaired. Display messages and
warning/indicator lamps 675

Cof
fee cup symbol
see ATTENTION ASSIST
Collapsible spare wheel .......................... 589
Inflating ............................................... 591
No tes .................................................. 589
Re moving ............................................ 590
Combination switch ................................15 8
Compass .................................................. 444
Compu ter
see On-board computer
Connection status
Displ aying ............................................ 490
Overview ............................................ .490
Connectivity Switching transmission of theve hicle
position on/off .................................... 390
Contacts ................................................... 461
Calling up ............................................ 462
Deleting ............................................... 464
Deleting favo urites .............................. 464
Downloading (from mobile phone) ...... 462
Importing ............................................ 463
Importing (o verview) .......................... .463 Information .......................................... 461
Making a call ....................................... 463
Na
me form at ...................................... .462
Options ................................................ 463
Saving as a favo urite .......................... .464
Selecting options for suggestions ........ 464
St oring ................................................ 463
Con venience closing ...............................1 00
Conv enience opening ................................ 99
Coolant (engine) Levelch eck ......................................... 536
No tes .................................................. 604
Cooling see Climate control
Co pyright ...................................................35
Cornering light ........................................ .160
Co ver
see Side windo ws
Cross Traf fic Alert .................................. .299
Crosswind Assist Function/no tes ................................... 234 Cruise control
.......................................... 241
Ac tivating ............................................ 24 3
Buttons ................................................ 24 3
Calling up a speed .............................. .243
Deactivating ........................................ 24 3
Fu nction ............................................... 241
Re quirements ...................................... 24 3
Selecting ............................................. 24 3
Setting a speed ................................... 24 3
St oring a speed ................................... 24 3
Sy stem limitations ...............................2 41
Cup holder ................................................ 14 8
Re ar .................................................... .135
Switching the cooling/heating func‐
tion on/off .......................................... 14 9
use (co ckpit) ........................................ 14 8 D
Damage de tection (pa rked vehicle) .......226
Dashboard see Cockpit
Dashboard lighting see Instrument lighting Index
687

¯Ad
Blue system fault Perf.
re duced in XXX miles See Owner's
Manual ................................................ 646
¯ AdBlue sy stem fault Perf.
re duced: XXX km/h Nostart in XXX
km ...................................................... .646
¯ AdBlue sy stem fault See Own‐
er's Manual ........................................ .646
4Ad d 1 litre engine oil when next
re fuelling ............................................. 642
Anti-theft alarm sy stem Malfunction ... 660
Apply brake todeselect Park (P)
position ...............................................6 47
App lybrake toselect R ........................ 648
À ATTENTION ASSIST inoperative ... 625
ÀAT TENTION ASSIS T:Take a
break! .................................................. 625
bAu tomatic driving lights inoper‐
ative .................................................... 663
Au xilia rybattery malfunction ..............649Beginning eme
rgency stop .................. 628
Blind Spot Assist cur rently una vaila‐
ble See Owner's Manual ...................... 630
Blind Spot Assist inope rative ............... 630
Blind Spot Assi stnot available when
to wing a trailer See Owner's Manual ...6 30
Cannot start engine See Owner's
Manual ................................................ 639
ÁChan gekey bat teries .................. 655
JCheck brake fluid le vel................ .619
Check brake pads See Owner's Man‐
ual ........................................................ 61 9
ï Check trailer hit chlock (white
display message) ................................ .657
Check tyre pressures then restart
Ru n Flat Indicator ................................ 651
hCheck tyre(s) ............................... 652
!Clean the fuel filter ...................... 640
Á Compressor is cooling ................ 629?Coolant
Stop vehicle Switch
engine off ............................................ 637
Cruise contro l and Limiter inope ra‐
tive ...................................................... 635
Cruise control inope rative ................... 635
Cruise control off ................................ 635
_Cur rently una vailable Camera
view restricted ..................................... 633
çCu rrently unavailable Radar
sensors dirty .......................................6 32
!cur rently una vailable See Own‐
er's Manual .......................................... 612
÷ currently una vailable See Own‐
er's Manual .......................................... 61 3
Drive sy stem Malfunction Stop
Switch engine off ................................. 641
Drive sy stem Malfunction Visit work‐
shop ..................................................... 641
5 Engine oil le vel cannot be
measured ............................................ 644690
Index

PRE-SAFE impulse side inoperative
See Owner's Manual ............................624
PRE-SAFE inoperative See Owner's
Manual ................................................ 624
hRe ctify tyre pressure ................... 653
Re duce speed ...................................... 654
ØRe fill Ad Blue Engine start not
possible .............................................. .645
ØRe fill Ad Blue See Owne r’s Man‐
ual .......................................................6 44
! Release parking brake .................616
¸ Replace air cleaner ......................641
À Replace key See Owner's Man‐
ual ...................................................... .654
Á Replace key ................................ .655
8Re servefuel le vel........................ 640
6 Restra int sys. malfunction Con‐
sult workshop ...................................... 620
Re versing not poss. Consult work‐
shop ....................................................6 48Risk of
vehicle rolling away Apply
pa rking brake See Owner's Manual .....6 49
Risk of vehicle rolling Driver door
open and transmission not in P ...........647
Ru n Flat Indicator inope rative ............. 652
#See Owner's Manual ................... 638
Speed limit (winter tyres) XXX km/h ... 636
Speed Limit Assi stinope rative ........... .631
Ù Steering malfunction Incre ased
ph ysical ef fort See Owner's Manual .... 659
ÙSt eering malfunction Stop
immediately See Owner's Manual .......659
St op vehicle Lea veengine running
Wa itTransmission cooling ...................649
#St opvehicle Lea veengine run‐
ning ..................................................... 639
#St opvehicle See Owner's Man‐
ual .......................................................6 38
çsuspended .................................. 634
bSwitch off lights .......................... 663 bSwitch on headla
mps.................. 663
To shift out of P or N,depress brake
and start engine .................................. 647
Ø Top up AdBlue Perf.re duced in
XXX miles See Owner's Manual ...........645
Ø Top up AdBlue Perf.re duced:
XXX km/h Nostart in XXX km ............645
To p up coolant See Owner ’sManual ... 637
¥To p upwasher fluid .................... .661
Tr af fic Sign Assi stcur rently una vaila‐
ble See Owner's Manual ...................... 631
Tr af fic Sign Assi stinope rative ............. 631
ïTr ailer coupling extending… ......... 657
Tr ansmission Malfunction Stop ........... 648
! Turn on the ignition torelease
th e parking brake ................................. 61 5
h Tyre press. monitor cur rently
una vailable .......................................... 650
hTy repress. monitor inoperative
No wheel sensors ................................ 651692
Index

Media menu ........................................3
29
Menu designs ...................................... 322
Menu overview .................................... 320
Multifunction display .......................... .324
Na vigation menu ................................. 327
Operating ............................................ 320
Ra dio menu .........................................3 29
Service menu ...................................... 325
Te lephone menu .................................. 330
Tr ip menu ............................................ 326
On-boa rddiagno stics inter face
see Diagno stics connection
On-boa rdelectronics
Engine electronics .............................. .593
No tes .................................................. 593
Tw o-w ayradios .................................... 593
Online services see In Car Of fice
Open-source so ftwa re .............................. 35
Opening the tail gate using your foot
see HANDS-FREE ACCESS
Ope rating fluids
Ad Blue ®
............................................... 601
Ad ditives (fuel) .................................... 600 Brake
fluid .......................................... .603
Coolant (engine) .................................. 604
Engine oil ............................................ 602
Fu el (diesel) ......................................... 600
Fu el (petrol) ......................................... 599
No tes ................................................... 597
Wi ndsc reen washer fluid .................... .605
Operating saf ety
48 V on-board electrical sy stem ............ 24
Declaration of Conformity (electro‐
magnetic compatibility) ......................... 26
Declaration of conformity (ja ck) ............ 29
Declaration of con form ity (TIREFIT kit) .. 30
Declaration of con form ity (wireless
ve hicle components) ............................. 26
EQ Boost ............................................... 24
Information ............................................ 24
Operating sy stem
see On-board computer
Outside mir rors ................................ 170, 171
Anti-dazzle mode (automatic) .............. 171
Au tomatic mir rorfo lding function ........ 173
Fo lding in/out .................................... .170
Operating the memory function ........... 131
Pa rking position .................................. .172 Setting .................................................
17 0
Overhead control panel Overview ................................................ 12
Owner's Manual Vehicle equipment ................................. 24
Owner's Manual (digital) .......................... 20 P
Pa int code ................................................ 595
Pa intwork (cleaning instructions) .........542
Pa nel heating
Setting .................................................1 27
Pa nic alarm ................................................ 83
Ac tivating/deactivating ......................... 83
Pa noramic roof
Ad justing thero ller sunblind ................ 103
Operating thero ller sunblind .............. .102
Pa noramic sliding sunroof
see Sliding sunroof
Pa rk position
Inserting .............................................. 207
Selecting au tomatically ....................... 207 Index
707