2020 MERCEDES-BENZ S-CLASS SALOON LONG coolant

&
WARNING Risk of an accident due to
va pour poc kets form ing in the brake sys‐
tem
The brake fluid constantly absorbs moisture
from the air. This lo wersthe boiling point of
th e brake fluid. If the boiling point is too lo w,
va pour poc kets may form inthe brake sys‐
te m when the brakes are applied hard.
This impairs the braking ef fect. #
Have the brake fluid rene we d at the
specified inter vals. Ha
ve the brake fluid regularly replaced at a
qu alified specialist workshop.
Only use a brake fluid appr ovedby Mercedes-
Benz according toMB-F reigabe or MB-Appr oval
33 1.0. Coolant
Note
s on coolant
Obser vethe no tes on operating fluids
(/ page 480). &
WARNING Risk offire ‑ and inju ryfrom
antifreeze
If antifreeze comes into contact with hot
component parts in the engine compart‐
ment, it may ignite. #
Allow the engine tocool down before
yo uto p up the antif reeze. #
Make sure that no antifreeze spills out
next tothefiller opening. #
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. Te
ch nical da ta487

Engine
Display messages
Possible causes/consequences and M
MSolutions
To switch off the engine,
press the Start/Stop but-
ton for at least 3 seconds
or 3 times. *Y
ou ha vepressed thest art/ stop button while theve hicle is in motion. #
Information about switching off the engine while driving (/ page189).
+
Top up coolant See Own-
er’s Manual *T
he coolant le vel is too lo w.
* NO
TEEngine dama gedue toinsuf ficient coolant #
Avoid long journe yswith insuf ficient coolant. #
Add coolant (/ page 352). #
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. 51 0
Displaymessa ges and warning/indicator lamps

Display messages
Possible causes/consequences and M
MSolutions &
WARNING Risk of bu rns when opening the bonn et
If yo u open the bonn etwhen the engine has overheated or when there is a fire inthe engine compartment, the
fo llowing situations may occur:
R You could come into contact with hot gases.
R You could come into contact with other hot, escaping operating fluids. #
Before opening the bonn et, allow the engine tocool down. #
Intheeve nt of a fire inthe engine compartment, keep the 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 511

Wa
rning and indicator lamps Overview of indicator and
warning lamps Some sy
stems will per form a self-test when the
ignition is switched on. Some indicator and
wa rning lamps may briefly light up or flash. This
behaviour is non-critical. These indicator and
wa rning 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.
Driver display Driver display with driver camera
Indicator and
warning lamps:
6 Re
stra int sy stem (/ page 551)
ü Seat belt (/
page 551)
ï Trailer hit ch (/page 552)
Ù Powe rst eering (yellow)
(/ page 552)
Ù Powe rst eering (red) (/ page 552)
Ù Rear-axle steering (yellow)
(/ page 552)
Ù Rear-axle steering (red)
(/ page 552) ÿ
Coolanttemp erature (/ page 555)
; Engine diagnostics (/
page 555)
% Preglow
# Elect
rical fault (/ page 555)
8 Re
ser vefuel with fuel filler flap loca‐
tion indicator (/ page 555)
! Elect
ric pa rking brake (red)
(/ page 558)
! Electric parking brake (yellow)
(/ page 558)
J Brakes (yellow) (/
page 558)
J Brakes (red) (/
page 558)
L Distance warning (/ page 560)
ä AIRMATIC (/ page 560)
! ABS (/
page 562)
÷ ESP®
(/ page 562)
å ESP®
OFF (/ page 562)
H Mercedes me connect
(/page 564)
h Ty
re pressure monitoring sy stem
(/ page 565) 550
Display messages and warning/indicator lamps

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 Risk of bu rns when opening the bonn et
If yo u open the bonn etwhen the engine has overheated or when there is a fire inthe engine compartment, the
fo llowing situations may occur:
R You could come into contact with hot gases.
R You could come into contact with other hot, escaping operating fluids. #
Before opening the bonn et, allow the engine tocool down. #
Intheeve nt of a fire inthe engine compartment, keep the bonn etclosed and call thefire service. Display messages and
warning/indicator lamps 555

Wa
rning/indicator lamp
Possible causes/consequences and M
MSolutions #
Stop theve hicle immediately in accordance with the traf fic conditions and switch off the engine. Do not continue
driving. #
Notethe messages on the driver 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.
If th e coolant temp erature display is at the upper end of thete mp erature scale: #
Exit theve hicle and keep a safe dis tance 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 qualified specialist workshop. In doing so, ensure that 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 bat tery cooling is faulty
R The radiator shutters are bloc ked or defective #
Avoiding high loads on the engine, drive tothe nearest qualified specialist workshop. 556
Display messages and warning/indicator lamps

To
pTe ther............................................... 68
Children Avoiding dangers in theve hicle............... 58
Basic instructions.................................... 57
Chock Storage location.................................... 391
Chock see Chock
City lighting................................................ 157
Cleaning see Care
Climate control Activating/deactivating (rear operat‐
ing unit)................................................ .174
Ac tivating/deactivating the A/C
function (MBUX multimedia sy stem)...... 174
Ac tivating/deactivating the synchro‐
nisation function (MBUX multimedia
sy stem).................................................. 175
Air-reci rculation mode.......................... .175
Au tomatic control.................................. 174
Calling up the air conditioning menu...... 174
Demi sting the windscreen..................... 172
Demi sting windo ws................................ 175Fr
ont air vents....................................... 185
Glo vebox air vent.................................. 187
Immedia tepre-entry climate control.....1 80
Information on the windscreen heater... 17 7
Inserting/removing theflacon (fra‐
gr ance sy stem)...................................... 176
Ionisation............................................... 176
No te....................................................... 172
Pre-ent ryclimate control at depar‐
ture time................................................ 178
Re ar air vents........................................ 186
Re ar operating unit................................ 173
Re sidual heat......................................... 175
Re sidual heat (rear operating unit)......... 176
Setting (MBUX multimedia sy stem)........ 174
Setting the air distribution..................... 172
Setting the air flow ................................. 172
Setting the fragrance sy stem.................1 76
Setting thete mp eratur e........................ 172
St ationary heater/ ventilation................ 181
Switching on/of f................................... 173
Switching there ar wind owheater
on/off....................................................1 72
THERMOTRONIC contro l panel..............172
Ve ntilating theve hicle (con venience
opening).................................................. 95 Co
ckpit
Overview................................................... 6
Co ffee cup symbol
see ATTENTION ASSIST with micro‐
sleep de tection
Collision de tection (pa rked vehicle)
Information............................................ 217
Combination switch .................................. 154
Consum ption indicator
Calling up.............................................. 201
Content sharing menu Overview............................................... 299
Control elements Touch-sensitive........................................ 23
Con venience closing ................................... 95
Con venience opening ..................................95
Coolant (engine) Check le vel............................................ 352
No tes..................................................... 487
Cooling see Climate control
Co pyright..................................................... 39 Index
573

Display message
Calling up (driver display)...................... 492
Notes....................................................4 92
Display messages ç - - - km/h ..................................... 523
È - - - km/h ..................................... 522
# 12V on-board electrical sys‐
te m Visit workshop ...............................5 38
Û 48 V battery See Owner's Man‐
ual......................................................... 540
: Active Light Sy stem inoperative... 499
¯ AdBlue sy stem fault Engine
st art not possible................................. .547
¯ AdBlue sy stem fault See Own‐
er's Manual .......................................... .546
¯ AdBlue sy stem malfunction
Emerg. op.: max. XXX km/h Start
not poss. in XXX km............................. .547
¯ AdBlue sy stem malfunction
Emer gency op. in XXX km See Own‐
er's Manual........................................... 5465
Add 1 litre engine oil when
next refuelling....................................... 548
é ATTENTION ASSIST inoperative ....521
P ATTENTION ASSIST Microsleep
Ta ke a break! ........................................ .522
é ATTENTION ASSIS T:Take a
break!....................................................5 22
: Automatic driving lights inoper‐
ative...................................................... 498
Ø Beginning emer gency stop........... 525
J Brake immediately....................... 520
Á Change key bat teries ...................4 96
J Checkbrake fluid le vel................. 520
# Check brake pads See Owner's
Manual.................................................. 521
ï Check trailer hitch lo ck................ 503
h Check tyre(s)................................ 542
! Clean the fuel filter ...................... .512
ÿ Coolant Stop vehicle Switch
engine off..............................................5 10á
currently una vailable Camera
dirty....................................................... 529
¸ Currently una vailable Radar
dirty.......................................................5 28
! currently una vailable See Own‐
er's Manual .......................................... .533
÷ currently una vailable See Own‐
er's Manual .......................................... .535
5 Engine oil le vel cannot be
measured .............................................. 549
5 Engine oil le velRe duce oil le vel.... 548
5 Engine oil le velSt op vehicle
Switch engine off.................................. 548
5 Engine oil pressu reStop
Switch off engine.................................. 549
ä Fault Drive at max. 80 km/h........ 530
6 Front left malfunction Consult
wo rkshop (e xample).............................. 493
& inoperative Battery low................. 501
& Inoperati veRefuel vehicle ............ 501 Index
575