2021 MERCEDES-BENZ S-CLASS SALOON LONG engine coolant

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
Cannot start vehicle See
Owner's Manual *T
hevehicle cann otbe star ted. #
Switch theve hicle o. and switch it back on #
Ifth e display message still appears, consult a quali/ed specialist workshop.
+
Top up coolant See Own-
er’s Manual *T
he coolant le vel is too lo w.
* N NO
OTE
TE Engine damage due toinsu1cient coolant #
Avoid long journe yswith insu1cient coolant. #
Add coolant (/ page 428). #
Have the engine cooling system checked at a quali/ed specialist workshop.
ÿ
Coolant Stop Switch off
the vehicle *T
he coolant is too hot. #
Stop immediately in accordance with the tra1c conditions and switch o. theve hicle. &
W WARNING
ARNING Risk of burns when opening the bonnet
If yo u open the bonnet in theev ent of an overheated engine or /re in the engine compartment, thefo llowing situa-
tions may occur:
R You may come into contact with hot gases.
R You may come into contact with other escaping hot operating 0uids. 526
526
Displ
aymessages and warning/indicator lamps

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions #
Before opening the bonnet, allow the engine tocool down. #
Intheev ent of a /re in the engine compartment, keep the bonnet closed and call the /re 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 quali/ed specialist workshop. In doing so, ensu rethat the
coolant temp erature display remains below 120°C.
ÿ *T
here is a malfunction in the engine cooling system. #
Avoiding high loads on the engine, drive tothe nearest quali/ed specialist workshop. In doing so, ensu rethat the
coolant temp erature display remains below 120°C.
8
Reserve fuel level *T
he fuel supply has dropped into there ser verange. #
Refuel.
! Clean the fuel filter *V
Vehicles wit
ehicles wit h diesel engines:
h diesel engines: the fuel /lter is dirty or thewa ter in the fuel /lter needs tobe drained. #
Consult a quali/ed specialist workshop. Displ
aymessages and warning/indicator lamps
527
527

W
W
ar
ar ning and indicat
ning and indicat or lam
or lamps
ps Ov
Ov
er
ervie
vie w of indicat
w of indicat or and w
or and war
arning lam
ning lamps ps Some systems will per
form a self-test when the
ve hicle is switched on. Some indicator and warn-
ing lamps may brie0y light up or 0ash. This beha v-
iour is non-critical. These indicator and warning
lamps indicate a malfunction only if they light up
or 0as haTer theve hicle has been star ted or dur-
ing a journe y.
Dr
Dr iv
iver's display
er's display Dr
Dr
iv
iver's displa
er's displa y wit
y with dr
h driv
iver camera
er camera Indicat
Indicat
or and w
or and w ar
arning lam
ning lam ps:
ps:
6 Restraint system (/ page 573)
ü Seat belt (/ page 573)
_ Reduced po wer (/ page 574)
Ú System error (/ page 574)
# Electricalfault (/ page 574)
ï Trailer hitch (/ page 575)
Ù Powe r steering (yellow) (/ page 575)
Ù Power steering (red) (/ page 575)
Ù Rear axle steering (yellow)
(/ page 575) Ù
Rear axle steering (red)
(/ page 575)
ÿ Coolanttemp erature (/ page 578)
; Engine diagnostics (/ page 578)
p V
Vehicles wit
ehicles wit h a pe
h a petr
trol engine:
ol engine: engine
operating temp erature (/ page 578)
% V
Vehicles wit
ehicles wit h a diesel engine:
h a diesel engine: preglow
# Electricalfault (/ page 578)
8 Reser vefuel wi thfuel /ller 0ap loca-
tion indicator (/ page 578)
! Electric parking brake (red)
(/page 581)
! Electric parking brake (yellow)
(/page 581)
J Brakes (yellow) (/ page 581)
J Brakes (red) (/ page 581)
L Distancewarning (/ page 584)
Ó Active Brake Assist (/ page 584)
ê Active Brake Assist (/ page 584)
Æ Active Brake Assist (/ page 584) Display messages and
warning/indicator lamps
571 571

Engine
Engine
W
W
ar
ar ning/indicat
ning/indicat or lampP
or lam pP ossible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
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. &
W
WARNING
ARNING Risk of burns when opening the bonnet
If yo u open the bonnet in theev ent of an overheated engine or /re in the engine compartment, thefo llowing situa-
tions may occur:
R You may come into contact with hot gases.
R You may come into contact with other escaping hot operating 0uids. #
Before opening the bonnet, allow the engine tocool down. #
Intheev ent of a /re in the engine compartment, keep the bonnet closed and call the /re service. #
Stop immediately in accordance with the tra1c conditions and switch o. theve hicle. Do not continue driving. 578
578
Displ
aymessages and warning/indicator lamps

W
W
ar
ar ning/indicat
ning/indicat or lampP
or lam pP ossible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions #
Notethe messages on the driver displa y.
If t
If t he coolant t
he coolant t em
emper
per atur
atur e displa
e displa y is at t
y is at the low
he lower end of t
er end of t he t
he tem
emper
per atur
atur e scale:
e scale: #
Consult a quali/ed specialist workshop.
If t
If t he coolant t
he coolant t em
emper
per atur
atur e displa
e displa y is at t
y is at the upper end of t
he upper end of t he t
he tem
emper
per atur
atur e scale:
e scale: #
Exit theve hicle and keep a safe distance from it 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 quali/ed specialist workshop. In doing so, ensu rethat the
coolant temp erature display remains below 120°C.
ÿ
Coolant warning lamp (yel-
low) *T
he yellow coolant warning lamp is lit while the engine is running.
Po ssible causes:
R The temp erature sensor is malfunctioning
R The charge air, transmission oil or battery cooling is faulty
R The radiator shutters are bloc ked or defective #
Avoiding high loads on the engine, drive tothe nearest quali/ed specialist workshop. Displ
aymessages and warning/indicator lamps
579
579

Setting
the air0ow (THERMOTRONIC)..... 189
Setting the frag rance system.................. 195
Setting thete mp erature
(THERMOTRONIC).................................. 189
St ationary heater/ ventilation................. 201
Switching there ar wind owheater
on/o. (THERM OTRO NIC).......................1 89
THERMOTRONIC control panel............... 189
Ve ntilating theve hicle (con venience
opening)................................................ 106
Coc Coc kpit
kpit, Dashboard
Overview................................................ 6, 8
Collision det
Collision det ection (park
ection (parked v
ed vehicle)
ehicle)
Information.................................... 264, 265
Combination switch
Combination switch ..................................... 171
Com
Com ponent-speci/c
ponent-speci/c inf
infor
ormation
mation................... 479
Cont
Cont ent shar
ent shar ing menu
ing menu
Overview................................................ 367
Contr
Control elements ol elements
To uch-sensitive........................................ 25
Conv
Conv enience closing
enience closing.................................... 107
Conv
Conv enience opening
enience opening................................... 106 Coolant (engine)
Coolant (engine)
Levelch eck............................................ 428
No tes..................................................... 489
Cop
Cop yr
yright
ight....................................................... 44
Cor
Cor ner
nering light
ing light............................................. 173
Cr
Cr osswind Assi st
osswind Assist
Fu nction/no tes...................................... 270
Cup holder
Cup holder Switching the cooling/heating func-
tion on/o.............................................. 159
Cushionbag
Cushionbag.................................................... 53 D
D
Dashcam
Dashcam Notes..................................................... 395
Selecting a USB device......................... .396
St arting/stopping a video recording...... .396
Dat
Dat a acq
a acq uisition
uisition
Ve hicle..................................................... 41
Dat
Dat a pr ot
a pr otection r
ection r ights
ights
Data storag e............................................ 44
Dat
Dat a st
a st or
orage
age
Data pr otection rights............................. .44Electronic control units............................ 41
Online services.......................................
.43
Ve hicle..................................................... 41
Deactiv Deactiv ating t
ating the alar
he alar m (AT
m (ATA)
A)........................ .115
Declar
Declar ation of conf
ation of conf or
ormity
mity
Electromagnetic compatibility.................. 29
Impor ter addresses.................................. 36
Jack......................................................... 36
Speci/c absor ption rate........................... 29
TIREFIT kit................................................ 37
Wi reless vehicle component s................... 29
Decor Decor ativ
ative f
e foil (cleaning ins
oil (cleaning instr tructions)
uctions)........... 432
Defr
Defr os
ost functiont function ........................................... 192
Des
Destination entry tination entry, Navigation
Entering a POI or addre ss....................... 390
Diagnos
Diagnos tics connection
tics connection , On-board diag-
nostics inter face............................................ 37
Diesel
Diesel Low outside temp eratures...................... 484
No tes..................................................... 484
DIGIT
DIGIT AL LIGHT
AL LIGHT
Ac tive headlamps................................... 172
Assistance functions.............................. 174 Index
597
597

Û
Battery overheated Stop, every-
body out! Outdoors if possible ................ 511
Ø Beginning emer gency stop............ 542
J Brake immediate ly........................ 536
Á Change key batteries .................... 501
è Charger cable connected .............. 509
J Check brake 0uid le vel.................. 536
ï Check trailer hitch lock (white
display message) .................................... 517
h Check tyre(s) ................................ 563
! Clean the fuel /lter....................... 527
É Compressor is cooling .................. 552
ÿ Coolant Stop Switch o. the
ve hicle ................................................... 526
! currently una vailable See Own-
er's Manual............................................5 54
÷ currently una vailable See Own-
er's Manual............................................5 55
5 Engine oil le vel cannot be meas-
ured....................................................... 570 5
Engine oil le velRe duce oil le vel..... 569
5 Engine oil le velSt op Switch o.
th eve hicle ............................................. 569
5 Engine oil pressure Stop Switch
o. theve hicle ....................................... .570
ä Fault Drive at max. 80 km/h
...................................................... 549, 550
ä Fault Stop.................................... .551
6 Front leT malfunction Consult
wo rkshop (e xample)...............................4 97
6 Fueltank is depre ssurised
Re ady forre fuelling............................... .514
Û Have high- voltage system
ch ecked See Owner's Manual ................ 512
& inoperative Battery low................. 506
& Inoperative Char gehigh- voltage
battery................................................... 507
& inoperative High-voltage battery
ch arging inco mplete ............................... 507
& Inoperative Refuel vehicle ............ .506 &
inoperative See Owner's Man........ 506
! inoperative See Owner's Manual.. .555
÷ inoperative See Owner's Manual.. .556
T inoperative See Owner's Manual.. .557
G Inoperative................................... 558
¥ Intensive cleaning activated for
30 s....................................................... 525
Á Key being initialised Please wait.... 502
Á Key not de tected (red display
message)...............................................5 01
Á Key not de tected (white display
message)...............................................5 01
: LeT dipped beam (e xample).......... 502
6 LeT windowbag malfunction
Consult workshop (e xample).................. 498
: Malfunction See Owner's Man-
ual.........................................................5 03
Û Malfunction Visit workshop ........... 511
d Malfunction.................................. 512
Û Malfunction.................................. 511 Index
599 599

¸
temp orarily una vailable Sensors
dirty....................................................... 546
Ø Top up AdBlue Emer gency op. in
XXX km See Owner's Manual................ .566
+ Top up coolant See Owner ’s
Manual.................................................. 526
¥ Top up washer 0uid...................... .524
u Towing not permitted See Own-
er's Manual ............................................ 508
ï Trailer coupling in motion .............. 516
d Vehicle is operational Switch o.
ve hicle before exiting............................. 516
É Vehicle rising Please wait.............. 552
h Warning tyre defect....................... 564
h Wheel sensor(s) missing ................ 563
Ø XX,X l Top up AdBlue Emerg.
op.: max. XXX km/h Start not poss.
in XXX km.............................................. 566 Ø
XX,XlTop up AdBlue Swit ch
ve hicle on, wait 60 sec. or engine
start not poss........................................ 567
"Electric" drive prog ram cur rently
una vailable............................................. 510
AC charging inoperative Consult work-
shop ...................................................... 510
Ac tive Blind Spot Assist cur rently
una vailable See Owner's Manual ............ 544
Ac tive Blind Spot Assist inoperative........ 545
Ac tive bonnet malfunction See Own-
er's Manual............................................ 521
Ac tive Brake Assist Functions cur-
re ntly limi ted See Owner's Manual .........557
Ac tive Brake Assist Functions limi ted
See Owner's Manual.............................. 558
Ac tive Distance Assist available again ..... 540
Ac tive Distance Assist cur rently
una vailable See Owner's Manual ............ 539
Ac tive Distance Assist inoperative.......... 540 Ac
tive Emer gency Stop Assist cur-
re ntly una vailable See Owner's Manual ... 542
Ac tive Emer gency Stop Assist inoper-
ative...................................................... 542
Ac tive Lane Change Assist cur rently
una vailable See Owner's Manual ............ 542
Ac tive Lane Change Assist inoperative... 543
Ac tive Lane Keeping Assist cur rently
una vailable See Owner's Manual ............ 545
Ac tive Lane Keeping Assist inoperative... 545
Ac tive Parking Assist and
PA RKTRONIC inope rative See Own-
er's Manual............................................ 553
Ac tive Steering Assist cur rently
una vailable due tomultiple emer-
ge ncy stops........................................... 541
Ac tive Steering Assist cur rently
una vailable See Owner's Manual ............ 541
Ac tive Steering Assist inoperative...........5 41 Index
601 601