battery MERCEDES-BENZ S-CLASS SALOON LONG 2021 Owners Manual

Light and sight
Light and sight
............................................ 169 169
Exterior lighting ........................................... 169
Interior lighting ............................................ 178
Wi ndsc reen wipers and windscreen
wa sher system ............................................ 181
Mir rors ........................................................ 184
Area permeable toradio waves on the
windscreen ................................................ .187
Inf rare d-re0ective windscreen function ........ 188 Climat Climat
e contr
e contr ol
ol........................................... 189 189
Overview of climate control systems ............ 189
Operating the climate control system .......... 191 Dr Dr
iving and par
iving and par king
king..................................... 208 208
Driving ........................................................2 08
DY NAMIC SELECT button ........................... .226
Au tomatic transmission .............................. .231
Fu nction of the 4MATIC ...............................2 35
Re fuelling .................................................... 235
Charging the high-voltage battery (plug-in
hy brid) ........................................................ 241
Pa rking .......................................................2 58
Driving and driving saf ety sy stems ............... 266 Tr
ailer hitch ................................................ .336
Bicycle rack function ................................... 342
Ve hicle towing instructions .......................... 344 Dr
Dr
iv
iver displa
er displa y
y............................................. .345
345
No tes on the driver's display ....................... 345
No tes on the 3D driver's display .................. 345
Operating the driver's display ...................... 345
Driver display menus ................................... 346
Head-up display .......................................... 348
Ve hicles with a 48 V on-board elect rical
system ........................................................ 352
Fu nction of the po wer me ter ........................ 352
Overview of status displa yson the driver's
display ........................................................3 52 MBUX V MBUX V
oice Assist
oice Assist ant
ant................................. 354 354
No tes on operating saf ety .......................... .354
Operation .................................................... 354
Using MBUX Voice Assistant e.ectively .......3 56
Essential voice commands .......................... 357 MBUX multimedia syst MBUX multimedia syst
em
em............................ 361 361
Overview and operation ...............................3 61
System settings .......................................... 382
Plug-in hybrid settings ................................ .387
Na vigation and tra1c .................................. 388
Te lephone ................................................... 397
Mercedes me app ....................................... 400
Mercedes-Benz emer gency call system ....... 409
Ra dio, media & TV....................................... 416
Sound settings ............................................ 422 Maint Maint
enance and car
enance and car e
e................................. 423 423
ASS YST PLUS service inter val display .......... 423
Engine compartment ................................... 424
Cleaning and care ....................................... 429 Br Br
eakdo
eakdo wn assist
wn assist ance
ance................................. 437 437
Emer gency .................................................. 437
Flat tyre ...................................................... 439
Battery (vehicle) .......................................... 444
To w- starting or towing away ........................ 450
Electrical fuses ............................................ 457 Contents
3 3

Pr
ot
Pr otection of t
ection of t he en
he envir
vironment
onment
+ ENVIR
ENVIR
ONMENT
ONMENT AL NO
AL NOTE
TEEnvironmental
damage due tooperating conditions and
personal driving st yle The pollutant emission of
theve hicle is
directly related tothewa yyo u operate the
ve hicle.
Operate your vehicle in an environmentally
re sponsible manner tohelp pr otect the envi-
ro nment. Please obser vethefo llowing recom-
mendations on operating conditions and per-
sonal driving styl e.
Oper Oper ating conditions:
ating conditions: #
Make sure that the tyre pressure is cor-
re ct. #
Do not car ryany unnecessary weight
(e.g. roof luggage rack s once you no lon-
ge r need them). #
Adhere tothe service inter vals.
A regula rly serviced vehicle will cont rib-
ute toenvironmental pr otection. #
Always ha vemaintenance workcar ried
out at a quali/ed specialist workshop.
P
P er
er sonal dr
sonal dr iving s
iving stytyle:
le: #
Do not depress the accelerator pedal
when starting the engine. #
Do not warm uptheve hicle while sta-
tionar y. #
Drive carefully and maintain a suitable
distance from theve hicle in front. #
Avoid frequent, sudden acceleration and
braking. #
Change gear in good time and use each
ge ar only up toÔ of its maximum
engine speed. #
Switch o. theve hicle in stationary traf-
fi c, e.g. byusing the ECO start/s top
function. #
Drive in a fuel-e1cient manner. Obse rve
th e ECO display for an economical driv-
ing style. Plug-in h Plug-in h
ybr
ybrid
id
+ ENVIR
ENVIR
ONMENT
ONMENT AL NO
AL NOTE
TEEnvironmental
pollution caused byirre sponsible disposal
of the high-voltage battery A high-voltage battery contains materials
which are harmful
tothe environment. #
Dispose of faulty high-voltage batteries
at a quali/ed specialist workshop. T T
ak
ak e-bac
e-bac k of end-of-lif
k of end-of-lif e v
e vehicles
ehicles
EU countr
EU countr ies only:
ies onl y:
Mercedes-Benz will take back your end-of-life
ve hicle for environment-fri endly disposal in
accordance with the European Union (EU) End-of-
Life Vehicles Directi ve.
A network of vehicle take -back points and dis-
mantlers has been established foryo uto return
yo ur vehicle. You can lea veit at any of these
points free of charge . This makes an impor tant
cont ribution toclosing there cycling circle and
conserving resources. Gene
ral no tes
23
23

&
W
WARNI NG
ARNI NGRisk of accident due toobjects
in the driver's foot we ll
Objects in the driver's foot we ll may impede
pedal tr avel or block a depressed pedal.
This jeopardises the operating and road saf ety
of theve hicle. #
Stow all objects in theve hicle securely
so that they cannot getinto the driver's
fo ot we ll. #
Always /t the 0oor mats securely and as
prescribed in order toensure that there
is alw ays su1cient room forth e pedals. #
Do not use loose 0oor mats and do not
place 0oor mats on top of one ano ther. *
N NOOTE
TE Battery discharging from using devi-
ces connected tothe diagnostics connec-
tion Using devices at
the diagnostics connection
drains the batter y. #
Check thech arge leve l of the batter y. #
Ifth ech arge leve l is lo w,charge the bat-
te ry, e.g. bydriving a considerable dis-
ta nce. Please also no
tethe information about the 12 V
battery and short-dis tance trips in the "Driving
and Parking" chap ter (/ page 215). Connecting and using ano
ther device with the
diagnostics connection can ha vethefo llowing
e.ects:
R Malfunctions in theve hicle system
R Perm anent damage tovehicle components
Please referto thewa rranty term s and conditions
fo rth is matter.
Moreo ver,connecting equipment tothe diagnos-
tics connection can lead toemissions monitoring
information being reset, forex ample. This may
lead totheve hicle failing tomeet there qu ire-
ments of the next emissions inspection during the
main inspection. Quali/ed
Quali/ed
specialis
specialist w
t work
ork shop
shop
A qu ali/ed specialist workshop has the necessary
special skills, tools and quali/cations tocor rectly
car ryout any necessary workon your vehicle.
This particular lyapplies tosaf ety-re leva nt wo rks.
Alw ays ha vethefo llowing workcar ried out on
yo ur vehicle at a quali/ed specialist workshop:
R Safety-re leva nt wo rks 38
38
General no
tes

ing state, component loads, maintenance
requ ire-
ments and tech nical events or faults.
Depending on theve hicle equipment, thefo llo w-
ing data are stored:
R operating status of system components, such
as /ll le vels, tyre pressure or battery status
R malfunctions or faults in impor tant system
components, such as lights or brakes
R system reactions in special driving situations,
such as airbag depl oyment or the inter vention
of stability contro l systems
R information on events leading tovehicle dam-
age
In cer tain cases, it may be requ ired tostore da ta
th at wo uld ha veotherwise been used only temp o-
rari ly. This may be the case if theve hicle has
de tected a malfunction, forex ample.
If yo u use services, such as repair services and
maintenance work, stored operational data as
we ll as theve hicle identi/cation number can be
re ad out and used. They can be read out by
service network emplo yees, such as workshops
and manu facturers or third parties, such as break- down services. The same is true in
the case of
wa rranty claims and quality assurance measures.
In general, there adout is per form ed via the legally
prescribed port forth e diagnostics connection in
th eve hicle. The operational data that are read out
document tech nical states of theve hicle or of
individual components and assist in the diagnosis
of malfunctions, compliance with warranty obli ga-
tions and quality impr ovement. Tothat end, these
data, in particular information about component
loads, tech nical events, malfunctions and other
fa ults may be transmitted along with theve hicle
identi/cation number tothe manufacturer. Fur-
th ermore, the manufacturer is subject toproduct
liability. Forth is reason the manufacturer also
uses operational data from theve hicle, forex am-
ple, forre calls. These data can also be used to
ex amine the customer's warranty and guarantee
claims.
Fa ult memories in theve hicle can be reset by a
service outl etor at your requ est as part of repair
or maintenance work. Conv Conv
enience and inf ot
enience and inf otainment functions
ainment functions
Yo u can store con venience settings and individual
settings in theve hicle and change or reset them
at any time.
Depending on theve hicle equipment, this
includes thefo llowing settings, forex ample:
R seat and steering wheel positions
R suspension and climate cont rolsettings
R individual settings, such as interior lighting
Depending on the selected equipment, you can
import data into vehicle inf otainment functions
yo urself.
Depending on theve hicle equipment, this
includes thefo llowing data, forex ample:
R multimedia data, such as music, /lms or pho-
tosfo r playback in an integ rated multimedia
system
R address book data for use in connection with
an integ rated hands-free system or an integ ra-
te d navigation system
R entered navigation destinations
R data about the use of Internet services 42 42
General no
tes

K
K
e
ey
y Ov
Ov
er
ervie
vie w of ke
w of key functions
y functions &
W
WARNING
ARNING Risk of accident and inju rydue
to leaving children unattended in theve hi-
cle
If ch ildren are leT unattended in theve hicle,
th ey could, in particular:
R open doors, thereby endangering other
persons or road users.
R get out and be struck byoncoming tra1c.
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. *
N
NOOTE
TE Damage totheke y caused bymag-
netic /elds #
Keep theke yaw ay from strong magnetic
/elds. Ve
hicle key
1 Indicator lamp
2 Locks 3
Unlo cks (with embossed sur face)
4 Opens/closes the boot lid
% If indicator lamp 1does not light up aTer
pressing theÜ ors button, the battery
is we ak or possibly dischar ged. Re place the
battery as soon as possible.
Re place theke y battery (/ page 90).
The key loc ksand unloc ksthefo llowing compo-
nents:
R Doors
R Fuel /ller 0ap
R Soc ket 0ap (plug-in-hybrid)
R Boot lid
If th eve hicle is not opened within appr oximately
40 seconds aTer unlocking, it loc ksagain. Anti-
th eT pr otection is primed again.
Do not keep theke yto get her with elect ronic devi-
ces or me tal objects. This can a.ect theke y's
functionalit y. 88 88
Opening and closing

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 pollutants. It is
illegal todispose of them with the household
ru bbish. #
Dispose of batteries in an
environmentally responsible manner. Ta
ke dischar ged batteries toaqu ali/ed
specialist workshop or toa collection
point for used batteries. R
R
eq
eq uir
uir ements:
ements:
R Youre qu ire a CR 2032 3 V cell batter y.
Mercedes-Benz recommends that you ha vethe
battery replaced at a quali/ed specialist work-
shop. #
Remo vethe emer gency key (/ page 90). #
Press emer gency key2 into the opening in
th eke y in the direction of the arrow until co
ver1 opens. When doing so, do not hold
co ver1 closed. #
Insert emer gency key2 into the opening and
liT up co vering 3 and remo veit. #
Repeatedly tapth eke y again styour palm until
battery 4falls out of thekey. #
Insert the new battery with the positive pole
fa cing upwards. Use a lint-f ree clo thtodo so. #
Make sure that the sur face of the battery is
free of lint, grease and other impurities. #
Insert the front tabs of co vering 3 into the
housing and then press on bo thsides toclose
it. Opening and closing
91
91

#
Make sure that co vering 3 is comple tely
closed. #
Insert the front tabs of co ver1 into the
housing and then press until it is comple tely
closed. #
Insert the emer gency key again (/ page 90). Pr
Pr
oblems wit
oblems wit h t
h the key
he key , tr
, troubleshoo
oubleshoo ting
ting Y
Y
ou can no long
ou can no long er loc
er lock or unloc
k or unloc k t
k the v
he v ehicle
ehicle
Po ssible causes:
R The key battery is weak or dischar ged. #
Check the battery using the indicator lamp
(/ page 88). #
Replace theke y batter y,if necessary
(/ page 90). #
Use there placement key. #
Use the emer gency keyto lock or unlock
(/ page 96). #
Have theke ych ecked at a quali/ed specialist
wo rkshop. Ther
Ther
e is int
e is int erf
erfer
erence fr
ence fr om a pow
om a pow er
erful r
ful r adio signal
adio signal
sour
sour ce
ce
Po ssible causes if the function of theke y is
impaired:
R high voltage po wer lines
R mobile phones
R electronic devices (no tebooks, tablets)
R shielding due tome tal objects or induction
loops for electrical gate systems or automatic
bar riers #
Make sure that there is su1cient distance
between theke y and the po tential sou rce of
inter fere nce.
Y
Y ou hav
ou hav e los
e lost a key
t a key #
Have theke y deactivated at a quali/ed spe-
cialist workshop. #
If necessar y,ha ve the mechanical lock
re placed as well. Doors
Doors
N
No
ot
tes on t
es on t he additional door lock
he additional door lock The additional door lock is only
available forve hi-
cles forth e United Kingdom. &
W
WARNING
ARNING Risk of injury topersons inside
th eve hicle when the additional door lock
is activated
If th e additional door lock is activated, the
doors can no longer be opened from the
inside. #
Never lea vepersons, in particular chil-
dren, unattended in theve hicle. #
Ifth ere are persons in theve hicle, do not
activate the additional door loc k. The additional door lock is automatically activated
in
thefo llowing situations:
R The vehicle is loc ked using thekey.
R The vehicle is loc ked using KEYLESS-GO. 92 92
Opening and closing

%
Ifth e door handle is not extended, touch sen-
sor sur face 2 tounloc k. #
T
To loc
o loc k t
k the v
he v ehicle:
ehicle: touch recessed sensor
sur face 3. #
Conv
Conv enience closing:
enience closing: touch recessed sensor
sur face 3 for an extended period.
% Further information on con venience closing
(/ page 107). Pr
Pr
oblems wit
oblems wit h KEYLESS-GO, tr
h KEYLESS-GO, tr oubleshoo
oubleshooting
ting Y
Y
ou can no long
ou can no long er loc
er lock or unloc
k or unloc k t
k the v
he v ehicle using
ehicle using
KEYLESS-GO
KEYLESS-GO
Po ssible causes:
R The function of theke y has been deactivated.
R The key battery is weak or dischar ged. #
Activate the function of theke y (/ page 90). #
Check the battery using the indicator lamp
(/ page 88). #
Replace theke y batter y,if necessary
(/ page 90). #
Use there placement key. #
Use the emer gency keyto lock or unlock
(/ page 96). #
Have theve hicle and keych ecked at a quali-
/ed specialist workshop.
Ther Ther e is int
e is int erf
erfer
erence fr
ence fr om a pow
om a pow er
erful r
ful r adio signal
adio signal
sour
sour ce
ce
Po ssible causes if the function of KEYLESS-GO is
impaired:
R high voltage po wer lines R
mobile phones
R electronic devices (no tebooks, tablets)
R shielding due tome tal objects or induction
loops for electrical gate systems or automatic
bar riers #
Make sure that there is su1cient distance
between theke y and the po tential sou rce of
inter fere nce. A
A
ctiv
ctiv ating or deactiv
ating or deactiv ating t
ating the aut
he automatic loc
omatic loc king
king
f
f eature
eature Multimedia system:
4 © 5
Settings 5
Vehicle
5 Locking function
% The vehicle is loc ked automatically when the
ve hicle is switched on and the wheels are
turning faster than walking pace. #
Activate or deactivate Automatic locking.
In thefo llowing situations, there is a danger of
being loc ked out when the function is activated:
R The vehicle is being towe d or pushed. Opening and closing
95
95

The side wind
ow
The side wind ows canno
s canno t be opened or closed
t be opened or closed
using t
using t he conv
he conv enience opening f
enience opening f eatur
eature.
e.
Po ssible causes:
R The key battery is weak or dischar ged. #
Check the battery using the indicator lamp
(/ page 88). #
Replace theke y batter y,if necessary
(/ page 90). Sliding sunr
Sliding sunr
oof
oof Opening and closing t
Opening and closing t
he sliding sunr
he sliding sunroof
oof%
The term "sliding sunroof" refers to the pano-
ra ma sliding sunroof. &
W
WARNING
ARNING Risk of becoming trapped when
th e sliding sunroof is being opened and
closed
Body parts may become trapped in thera nge
of mo vement. #
During the opening and closing process,
make sure that no body parts are in the
sweep of the sliding sunroof. #
If someone is trapped, release the con-
trol panel immediatel y.
or #
Touch the control panel during automatic
operation.
The opening/closing process will be
stopped. &
W WARNING
ARNING Risk of entrapment if the slid-
ing sunroof is operated bychildren
Children operating the sliding sunroof could
get caught in the moving parts, particular lyif
unattended. #
Never lea vechildren unattended in the
ve hicle. #
When leaving theve hicle, alw aysta ke the
ke y with you and lock theve hicle. &
W
WARNING
ARNING Risk of becoming trapped when
th ero ller sunblind is being opened and
closed
Body parts may become trapped between the
ro ller sunblind and frame or sliding roof. #
During the opening or closing process,
make sure that no body parts are in the
ro ller sunblind's range of mo vement. #
If someone is trapped, release the con-
trol panel immediatel y.
or #
Touch the control panel during automatic
operation.
The opening/closing process will be
stopped. *
N NOOTE
TE Malfunction due tosnow and ice Sn
ow and ice may cause the sliding sunroof to
malfunction. #
Open the sliding sunroof only if it is free
of snow and ice. 108
108
Opening and closing

Yo
u can charge a USB device, such as a mobile
phone, at the USB ports using a suitable charging
cable. Depending on theve hicle equipment, the
devices can be charge d with up to20 V (5 A)
when the ignition is switched on. Coolbox
Coolbox
Using t
Using t
he r
he refr
efrig
iger
er at
ator box
or box &
W
WARNING
ARNING Risk of /re due toa co vered
ve ntilation grille on the coolbox
If yo u co verth eve ntilation grille forth e cool-
box, it may overheat. #
Always make sure that theve ntilation
gr ille is not co vered. The
vent grille forth ere frigerator box is in the
boot.
The refrigerator box can bear a maximum load of
3.5 kg.
The upper co mpartment of there frigerator box
can accommodate, forex ample, plastic bottles with a maximum capacity of 0.5 lit
res and cans
with a capacity of up to0.33 litres
If yo u do not need touse there frigerator box for
an extended period, you should switch it o.,
defrost it and clean it. ATer doing so, lea vethe lid
open for a time.
More condensation may occur during intensive
use. Cleaning may be requ ired.
The refrigerator box will reduce its cooling capa-
city or switch o. in thefo llowing cases:
R Too many electrical consumers are turned on.
R The star ter battery is not su1ciently charge d.
If th is is the case, the indicator lamps will 0ash on
th e button for switching there frigerator box on
and o.. The cooling function will au tomatically
switch back on as soon as there is su1cient volt-
age. Example:
vehicles with individual rear seats #
Vehicles with elect rically adjus table outer
seats: fold down there ar armrest. #
Pull handle 1on st owage box and fold down
co ver2 of st owage box. 162 162
Seats and st
owing