engine MERCEDES-BENZ S-CLASS SALOON LONG 2021 User Guide

Head r
Head r
es
estrtraints
aints A
A
djus
djusting t ting t he fr
he front seat luxur
ont seat luxur y head r
y head res
estrtraints
aints
mec
mec hanically
hanically &
W
WARNI NG
ARNI NGRisk of injury if vehicle settings
are adjusted while theve hicle is in motion
Yo u could lose control of theve hicle in partic-
ular in thefo llowing situations:
R Ifyo u adjust the driver's seat, the head
re straints, the steering wheel or the mir ror
while theve hicle is in motion.
R Ifyo ufa sten your seat belt while theve hi-
cle is in motion. #
Before starting the engine: adjust the
driver's seat, head restraints, stee ring
wheel and mir ror in particular and fasten
yo ur seat belt. &
W
WARNING
ARNING Risk of injury due toincor rectly
adjus ted head restraints
If head restraints ha venot been adjusted cor-
re ctl y,there is an increased risk of injury in th
e head and neck area, e.g. in theev ent of an
accident or sudden braking. #
Before driving o., make sure forev ery
ve hicle occupant that the centre of the
head restraint supports the back of the
head at about eye le vel. Ad
just the head restraint fore -and-aT position so
th at it is as close as possible tothe back of your
head. #
T
To mov
o mov e f
e forw
orw ar
ards:
ds: pull the head restraint for-
wa rds. #
T
To mov
o mov e bac
e backw
kwar
ards:
ds: press release knob 1
and push the head restraint ba ckwards. A
A
tt
tt ac
ac hing and r
hing and r emo
emoving t
ving t he additional cushion of
he additional cushion of
t
t he fr
he fr ont-seat luxur
ont-seat luxur y head r
y head res
estr
traint
aint #
Position head restraint 2asfarfo rw ards as
possible. #
T
To att
o att ac
ach t
h t he additional cushion:
he additional cushion: openVelcro
strip 4onthere ar of additional cushion 1. #
Guide Velcro strip 4between head restraint
2 and strip 3. Seats and st
owing
131
131

#
V
Vehicles wit
ehicles wit h r
h reclining r
eclining r ear seat
ear seat::press one of
preset position buttons 4orT.
The seat is mo vedto the stored position. ATer
re leasing the button, the front seat and rear
seat are mo ved automatically into the stored
position.
% The preset positions in the area forch au.eur
mode can only be set when the conditions for
ch au.eur mode are ful/lled (/ page 125).
% You can use there ar-compartment child
saf ety lock todisable this function
(/ page 86). S
S
t
to
o w
w ag
ag e ar
e ar eas
eas N
No
ot
tes on loading t
es on loading t he v
he vehicle
ehicle &
D
DAN
AN GER
GER Risk of exhaust gas poisoning
Combustion engines emit poisonous exhaust
ga ses such as carbon monoxide. Exhaust
ga ses can enter theve hicle interior if the boot
lid is open when the engine is running, espe-
cially if theve hicle is in motion. #
Always switch o. the engine before
opening the boot lid. #
Never drive with the boot lid open. Objects in
the deployment area of an airbag may
pr ev ent the airbag from functioning cor rectl y.
Obser vethe no tes on pr otection pr ovided bythe
airbag (/ page 54).
V
V ehicles wit
ehicles wit h r
h rear airbag:
ear airbag: also observethe no tes
on there ar airbag (/ page 61). &
W
WARNING
ARNING Risk of injury from unsecured
items in theve hicle
If objects, lug gage or loads are not secured or
not secured su1ciently, they could slip, tip
ov er or be thro wn around and thereby hit vehi-
cle occupants.
There is a risk of injur y,particular lyin the
eve nt of sudden braking or a sudden change
in direction. #
Always st owobjects in such a wayth at
th ey cannot be thro wn around. #
Before the journe y,secure objects, lug-
ga ge or loads against slipping or tipping
ove r. &
W WARNI NG
ARNI NGRisk of injury due toobjects
being st owed incor rectly
If objects in theve hicle interior are st owed
incor rectl y,they can slide or be thro wn around
and hit vehicle occupants. In addition, cup
holders, open st owage spaces and mobile
phone brac kets cannot alw aysreta in all
objects they contain.
There is a risk of injur y,particular lyin the
eve nt of sudden braking or a sudden change
in direction. #
Always st owobjects in such a wayth at
th ey cannot be thro wn around in such
situations. #
Always make sure that objects do not
pr otru de from st owage spaces, lug gage
nets or st owage nets. #
Close the loc kable st owage spaces
before starting a jou rney. 148
148
Seats and st
owing

5
L Low beam/high beam
6 R Switches there ar fog light on/o.
When low beam is activated, theT indicator
lamp forth e standing lights will be deactivated
and replaced bytheL low- beam indicator
lamp. #
Always park your vehicle safely using su1cient
lighting, in accordance with there leva nt legal
stipulations.
* N
NOOTE
TE Battery dis charging byoperating the
standing lights Operating
the standing lights over a period of
hours puts a strain on the batter y. #
Where possible, switch on theright X
or leT Wparking light. Fo
rve hicles that are wider than 2 m or lon ger
th an 6 m,single-sided parking lighting is not per-
mitted in some countries. In this case, the stand-
ing lights are also switched on in the parking
lights position. If
th e battery is insu1ciently charge d, the stand-
ing lights or parking lights will be switched o.
automatically tofacilitate the next engine start.
The exterior lighting (e xcept standing and parking
lights) will switch o. automatically when the driv-
er's door is opened.
R Obser vethe no tes on sur round lighting
(/ page 178).
Switc Switc hing on accident scene lighting
hing on accident scene lighting #
Switch o. theve hicle. #
Switch on the hazard warning light
(/ page 172). #
Turn the light switch from theà position to
th eL position.
The low beam will be switched on despite the
ve hicle being switched o..
The accident scene lighting will be switched o. if:
R you switch o. the hazard warning lights.
R you turn the light switch back toà .
R the battery is insu1ciently charge d. A
A
ut
ut omatic dr
omatic dr iving lights function
iving lights function
When theve hicle is switched on, the standing
lights, low beam and daytime running lights are
switched on automatically depending on the light
conditions. &
W
WARNING
ARNING Risk of accident when the
dipped beam is switched o. in poor visi-
bility
When the light switch is set toà ,the
dipped beam may not be switched on auto-
matically if there is fog, snow or other causes
of poor visibility such as spr ay. #
In such cases, turn the light switch to
L . The automatic driving lights are only an aid.
Yo u
are responsible forve hicle lighting.
Switc Switc hing t
hing t he r
he rear f
ear f og lights on or
og lights on or o.
o.
R
R eq
eq uir
uir ements:
ements:
R The light switch is in theL orà posi-
tion. #
Press the R button. 170
170
Light and sight

Se
Se
tting lo
tting lo w beam
w beam Multimedia system:
4 © 5
Settings 5
Lights
5 MULTIBEAM LED 5
Low beam #
Select Right-side traffic, Left-side trafficor
Automatic.
% Invehicles with DIGITAL LIGHT headlamps,
th e Intelligent Light System can be adjusted
on theDIGITAL LIGHT menu.Se
Se
tting t
tting t he e
he ext
xter
er ior lighting
ior lighting switc
switch-o.
h-o. dela
delay time
y time R
R
eq
eq uir
uir ements:
ements:
R The light switch is in theà position.
Multimedia system: 4 © 5
Settings 5
Lights
5 Interior/exterior lighting
5 Exterior lighting delayed switch off #
Set the swit ch-o. delay time.
When theve hicle's engine is switched o., the
ex terior lighting will be activated forth e set
time. A
A
ctiv
ctiv ating/deactiv
ating/deactiv ating t
ating the locat
he locat or lighting
or lighting R
R
eq
eq uir
uir ements:
ements:
R The light switch is in theà position.
Multimedia system: 4 © 5
Settings 5
Lights
5 Interior/exterior lighting #
Activate or deactivate Locator lighting.
When the function is activated, theex terior light-
ing will light up for 40 seconds aTer theve hicle is
unloc ked. When you start theve hicle, the locator
lighting is switched o. and automatic driving
lights are activated. Int Int
er
erior lighting
ior lighting A
A
djus
djus ting t
ting t he int
he int er
erior lighting
ior lighting 1
c
Switches the front interior lighting
on/o.
2 u
Switches there ar interior lighting on/o.
3 |
Switches automatic interior lighting con-
trol on/o. #
T To switc
o switc h r
h reading lam
eading lam ps
pson/o.:
on/o.: holdyour
hand under there spective reading lamp 4or
5. 178
178
Light and sight

Ov
Ov
er
ervie
vie w of climat
w of climat e contr
e control syst
ol systems
ems N
No
ot
tes on climat
es on climat e contr
e control
ol An interior air /lter in combination with
the pre/l-
ter inthe engine compartment must alw ays be
used so that the air conditioning system, pollution
le ve l monitoring and the air /lt ration workcor-
re ctl y.Use /lters recommended and appr oved by
Mercedes-Benz. Alw ays ha vemaintenance work
car ried out at a quali/ed specialist workshop. Ov
Ov
er
ervie
vie w of THERMO
w of THERMO TR
TRONIC climat
ONIC climat e bar
e bar The indicator lamps indicate
that the cor respond-
ing function is activated. Fr
ont climate bar on the central display
(e xamp le)
1 s Increases thete mp erature
2 Upper display area of the climate bar with the
ex amples of jswitching o. climate con-
trol (/ page 191), ¿switching the A/C
function on/o. (/ page 192) and0syn-
ch ronisation function (/ page 193) 3
¬ Demists the windscreen
(/ page 192, 196)
4 g Switches air-recirculation mode on/o.
(/ page 193) or
G Calls up the particulate status display
(/ page 191) or
Ac tivates/deactiva tesre sidual heat utilisation
(/ page 194)
Plug-in hybrid vehicles: &Activates or
deactivates pre-entry climate control
(/ page 200)
5 ¤ Switches there ar wind owheater on/o.
6 Depending on vehicle equipment and set-
tings: temp erature displa y,defrost function
displa y,air0o w,pre-ent ryclimate cont rol or
auxiliary heating
7 J Increases the air0ow or switches on cli-
mate control (/ page 191)
8 r Reduces thete mp erature
9 Ã Sets climate control toautomatic mode,
ri ght (/ page 192)
A ± Calls up the air conditioning menu
(/ page 191) Climate control
189 189

%
If air-recirculation mode is swit ched on, the
wind ows may mist up more quickl y.Switch on
ai r-re circulation mode only brie0y. Switc
Switc
hing r
hing r esidual heat mode
esidual heat mode on/o.
on/o.via t
via the cli-
he cli-
mat
mat e bar
e bar R
R
eq
eq uir
uir ements:
ements:
R The residual heat function is available.
R The vehicle is par ked.
R The coolant temp erature is su1ciently high.
It is possible tomake use of there sidual heat
from the engine tocontinue heating or ventilating
th e front compartment of theve hicle for appr ox-
imately 30 minutes, depending on thete mp era-
ture set. #
T
To switc
o switc h on or
h on or o.:
o.:select Residual heat on
th e climate bar of the central displa y.
The residual heat function automatically switches
o. aTer some time.
% Ifre sidual engine heat utilisation is activated,
th e two buttons for setting thete mp erature and air distribution are automatically deactiva-
te
d. Switc Switc
hing r
hing r esidual heat
esidual heat on/o.
on/o.via t
via the r
he rear oper
ear oper at-
at-
ing unit
ing unit R
R
eq
eq uir
uir ements:
ements:
R The residual heat function is available.
R The vehicle is par ked.
R The coolant temp erature must be su1ciently
high.
When there sidual heat of the engine is activated
in there ar compartment, you can heat or ventila te
th e front and rear compartments for appr ox-
imately 15 minutes. #
Press button Ì. A
A
ctiv
ctiv ating/deactiv
ating/deactiv ating ionisation
ating ionisation Multimedia system:
4 Climate menu 5
Air quality
Ionisation impr ovesth equ ality of theve hicle's
interior air. Ionisation of the interior air is odour-
less. #
Select Ionisation.
% The function can only be per form ed if the
AU TO mode is activated or the air distribution
is set tothe side air vent. The function is
re stric ted if the side air vents on the driver's
side are closed. F
F
r
ragr
agr ance syst
ance syst em
em A
A
ctiv
ctiv ating/deactiv
ating/deactiv ating t
ating the fr
he fragr
agrance syst
ance syst em
em
using t
using t he multimedia syst
he multimedia syst em
em
R
R eq
eq uir
uir ements:
ements:
R Automatic climate control is activated.
R The glo vecompartment is closed.
R A 0acon is inser ted. 194
194
Climate control

3
Selected depa rture time
4 Remaining time forth e stationary heater/
ve ntilation (in minutes)
5 Stationary heater/ ventilation active
6 Departure time activated
7 Signal strength
Fu rther possible displ ays:
R T
Time:
ime: the activated departure time.
R Zer
Zero minut
o minut es:
es:theru nning time forth e station-
ary heater is extended because the engine has
not yetreached operating temp erature when it
is star ted.
R OFF:
OFF: the stationary heater/ventilation is
switched o..
R
R eplacing t
eplacing t he r
he remot
emot e contr
e contr ol batt
ol batter
ery (st
y (st ationary
ationary
heat
heat er)
er) &
D
DAN
AN GER
GER Risk of fatal injuries if batteries
are swallo wed
Batteries contain toxic and cor rosive subs tan-
ces. Swallow ing batteries may cause se vere
internal burns within two hours. There is a
risk of fatal injur y. #
Keep batteries out of there ach of chil-
dren. #
Ifth e co ver and/or lid of the battery
compartment does not close securel y,
do not use theke y and keep it away from
ch ildren. #
If batteries are swallo wed, seek medical
attention immediatel y. +
ENVIR
ENVIR
ONMENT
ONMENT AL NO
AL NOTE
TEEnvironmen tal
damage due toimproper disposal of bat-
te ries Batteries contain
toxic and corro-
sive substances. #
Ta
ke dischar ged batteries to a
qu ali/ed specialist workshop or toa col-
lection point for used batteries. R
R
eq
eq uir
uir ements:
ements:
R One CR2450 lithium battery
Mercedes-Benz recommends that you ha vethe
battery replaced at a quali/ed specialist work-
shop. #
Push a poin ted object into recess 1. 204
204
Climate cont
rol

Dr
Dr
iving
iving N
No
ot
tes on plug-in h
es on plug-in h ybr
ybrids
ids N
No
ot
tes on plug-in h
es on plug-in h ybr
ybrid oper
id oper ation
ation &
W
WARNING
ARNING Risk ofchemical burns and poi-
soning from damaged high-voltage battery
If th e housing of the high-voltage battery has
been damaged, electrolyte and gases may
leak out. #
Avoid contact with the skin, eyes or
clo thing. #
Immediate lyrinse electrolyte splashes
o. with water and seek medical atten-
tion straight away. &
D
DAN
AN GER
GER Risk of explosion from excessive
internal pressure of the high-voltage bat-
te ry
Flammable gas may escape and ignite in the
eve nt of a vehicle /re. #
Stop thech arging process immediately
in case of unusual odours, smoke or
burn mar ks. #
Leavethe danger zone immediatel y.
Secure the danger zone at a su1cient
distance. #
Call the /re brigade. The
hybrid system combines a combustion engine
with electric mo tors. In drive prog ram A, the
hy brid system selects the most suitable drive type
according tothe driving conditions and the dis-
ta nce.
Cha racteristics when theve hicle is at a standstill:
R The combustion engine is generally switched
o..
R Idle speed only occurs in cer tain instances.
Characteristics when starting theve hicle:
R Ifth e high-voltage battery is su1ciently
ch arge d, theve hicle can be star ted with the
electric drive without the combustion engine
(noiseless start). R
Ifth e high-voltage battery forth e electrical
drive is not su1ciently charge d or the operat-
ing temp erature of the combustion engine has
not been reached, theve hicle can start with
th e combustion engine.
% Depending on the system, it may happen that
ev en though the high-voltage battery is
ch arge d, electric mode has restric ted or no
av ailabilit y.Once the combustion engine has
been operated for long enough and ambient
conditions permit, electric mode is again
av ailable without restriction.
Charac teristics wi thmoderate po wer output
re qu ests:
R The combustion engine is switched o. as
oTen as possible during the journe y.
R The vehicle can, depending on the drive pro-
gr am selected and the state of charge , be
accelerated elect rically up tospeeds of
appr oximately 140 km/h. ATer that, the com-
bustion engine is switched on. 208 208
Driving and parking

Characteristics with high po
wer output requ ests:
R The electric mo tors support the combustion
engine (boost e.ect), e.g. when pulling away
or accelerating.
R The high-voltage battery is discharging.
Characteristics when releasing the accelerator
pedal during the journe y:
R The electric mo tors are operated as a alterna-
to r when in overrun mode and during braking.
R The high-voltage battery is charging.
% In drive prog ram Î, theve hicle drives
purely elect ricall y,in drive prog rams C,
and B the combustion engine is alw ays on
No tes on elect ric mode:
R Vehicles with hybrid systems generate signi/-
cant lyless noise when stationary and when
being driven than vehicles with combustion
engines.
R When driving in elect ric mode theve hicle may
not be heard by otherroad users due tothe
signi/cantly reduced noise generated when
driving and when at a standstill. It is
forth is reason that theve hicle is equip-
ped with a sound generator, which ser ves as
an acoustic vehicle alerting system (A VAS).
R If not all of theve hicle conditions for electric
mode are met, then the combustion engine is
switched on.
No tes on the acoustic vehicle alerting system:
R The sound generator generates a stationary
noise and, up toa speed of about 60 km/h,
speed-dependent vehicle noise emissions.
R This helps other road users, particular ly
pedestrians and cyclists, tohear your vehicle
better.
R When driving at speeds abo ve20 km/h the
acoustic vehicle alerting system gradually
switches theve hicle noise emissions o.. Manual disconnection of t
Manual disconnection of t
he high-v
he high-volt
oltag
age on-
e on-
boar
boar d electr
d electr ical syst
ical syst em
em &
D
DAN
AN GER
GER Risk of death and /re due to
modi/ed and/or damaged components of
th e high-voltage on-board electrical sys-
tem
The vehicle's high- voltage on-board electrical
system is under high voltage. If you modify
component parts in theve hicle's high- voltage
on-board electrical system or touch damaged
component parts, you may be electrocuted. In
addition, modi/ed and/or damaged compo-
nents may cause a /re.
In theev ent of an accident or impact tothe
ve hicle underbod y,components of the high-
vo ltage electrical system may be damaged
although the damage is not visible. #
Never make any modi/cations tothe
high- voltage on-board electrical system. #
Do not switch on or use theve hicle if its
high- voltage on-board electrical system
components ha vebeen modi/ed or dam-
aged. Driving and parking
209 209

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. R
R
eq
eq uir
uir ements:
ements:
R theke y is in theve hicle and is recognised.
R the brake pedal is not depressed. #
T
To switc
o switc h on t
h on the pow
he pow er supply
er supply :
:press button
1 once.
Yo u can, forex ample, activate the windscreen
wiper.
The po wer supply is switched o. again if thefo l-
lowing conditions are met:
R you open the driver's door.
R you press button 1twice more. #
T
To switc
o switc h on t
h on the v
he vehicle:
ehicle: press button 1
twice.
Indicator and warning lamps go on in the driv-
er's displa y.
The vehicle is switched o. again if one of thefo l-
lowing conditions is met:
R you do not start theve hicle within 15 minutes
and the transmission is in position jorthe
electric parking brake is applied.
R you press button 1once. S S
t
tar
ar ting t
ting t he v
he vehicle
ehicle S
S
t
tar
ar ting t
ting t he v
he vehicle wit
ehicle wit h t
h the st
he st ar
art/st
t/st op butt
op butt on
on &
D
DAN
AN GER
GER Risk of fatal injuries caused by
ex haust gases
Combustion engines emit poisonous exhaust
ga ses such as carbon monoxide. Inhaling
th ese exhaust gases is hazardous tohealth
and leads topoisoning. Driving and parking
211
211