2020 MERCEDES-BENZ S-CLASS SALOON LONG engine

R
All electrical consumers are switched off.
R The ignition is switched off.
The electrical fuses are located in thefo llowing
fuse bo xes:
R Fuse box in the engine compartment on the
driver's side (/ page379)
R Fuse box on the driver's side of the cockpit
(/ page 381)
R Fuse box in the front passenger foot we ll
(/ page 381)
R Fuse box in the boot on theright-hand side
of theve hicle, when vie wed in the direction
of tr avel (/ page 381) Opening and closing
the fuse box in the
engine compa rtment Requ
irements:
R Obser vethe no tes on electrical fuses
(/ page 378).
R Have thefo llowing tools readily available:
- a dry clo th -
a sc rewdriver with an appropriate head
Opening
% Depending on theve hicle equipment, access
to the fuse box may be limited. Mercedes-
Benz recommends consulting a qualified
specialist workshop, e.g. a Mercedes-Benz
Service Centre. &
WARNING Risk of inju ryfrom using the
windscreen wipers while the engine bon‐
net is open
When the engine bonn etis open, and the
windscreen wipers are set in motion, you can
be trapped bythe wiper linkage. #
Alw ays switch off the windscreen wip‐
ers and ignition before opening the
engine bonn et. #
Release thero tary catches on co ver1 and
pull the co ver up and out. #
Remo veany existing moisture from the fuse
box using a dry clo th. Breakdown assis
tance 37 9

#
Depending on theve hicle equipment, there
may be an electrical component 2onthe
fuse box lid. If present, unscr ewscrew 3
and put the component tothe side without
disconnecting the electrical connection. #
If present, release hoses 4from there tain‐
ing clips on the fuse box and vehicle body. #
If present, release hoses 5from there tain‐
ing clips in the engine compartment and
ve hicle body. #
Unscr ew screws6 and fold out bar 7. #
Unscr ew screws8 and remo vefuse box lid
9 tothe side.
Closing #
Check whe ther the seal is positioned cor‐
re ctly in lid 9. #
Place lid 9onthe fuse box and tighten
scr ews8. #
Fold back bar 7and tigh ten scr ews6. 380
Breakdown assis tance

#
If present, engage hoses 5inthere tai ning
clips in the engine compartment and vehicle
body. #
If present, engage hoses 4inthere tai ning
clips on the fuse box and vehicle body. #
If present, insert electrical component 2
into the holder on the fuse box lid and
tighten scr ews3. #
Insert co ver1 and engage thero tary
catches. Opening and closing the fuse box in the
co
ckpit Re
quirements:
R Obser vethe no tes on electrical fuses
(/ page 378). #
Open cover1 inthe direction of the ar row
and remo veit. Opening and closing
the fuse box in the front
passenger foot we ll Re
quirements:
R Obser vethe no tes on electrical fuses
(/ page 378). #
Open cover1 inthe direction of the ar row
and remo veit. Opening and closing
the fuse box in the boot Re
quirements:
R Obser vethe no tes on electrical fuses
(/ page 378). Breakdown assis
tance 381

ch
ange tool kit, consult a qualified specialist
wo rkshop tofind out about suitable tools.
R The vehicle is not on a slope.
R The vehicle is on solid, non-slippery and le vel
ground. #
Apply the electric parking brake manually. #
Movethe front wheels tothest ra ight-ahead
position. #
Shift the transmission toposition j. #
Vehicles with le vel control sy stem: setthe
normal vehicle le vel (/ page 258). #
Swit choff the engine. #
Make sure that the engine cann otbe star ted. #
Place choc ks orother suitable items under
th e front and rear of the wheel that is diago‐
nally opposite the wheel you wish tochange. #
Remo vethe hub cap if necessary
(/ page 392). #
Raise theve hicle (/ page 392). Re
moving and fitting the wheel trim/hub
caps Re
quirements:
R The vehicle is prepared for a wheel change
(/ page 391).
Aluminium hub cap #
Toremo ve:position soc ket2 from the tyre-
ch ange tool kit on hub cap 1. #
Position wheel spanner 3on soc ket2. #
Using wheel spanner 3, turn hub cap1
anti-clo ckwise and remo veit. #
Tofit: follow the instructions abo vein
re ve rse order.
% Specified tightening torq ue: 25 Nm. Ra
ising theve hicle when changing a wheel Re
quirements:
R There are no persons in theve hicle.
R The vehicle has been prepared for a wheel
ch ange (/ page 391).
R The hub caps ha vebeen remo ved
( / page 392).
Impor tant no tes on using the jack:
R Use only a vehicle-specific jack that has
been appr oved byMercedes-Benz toraise
th eve hicle.
R The jack is only designed forra ising and
holding theve hicle for a short time while a
wheel is being changed and not for mainte‐
nance workunder theve hicle.
R The jack must be placed on a firm ,fl at and
non-slip sur face. 392
Wheels and tyres

R
The foot ofthe jack must be positioned verti‐
cally under the jack support point. Ru
les of conduct when theve hicle is raised:
R Never place your hands and/or feet under
th eve hicle.
R Never lie under theve hicle.
R Do not start the engine and do not release
th e electric parking brake.
R Do not open or close any doors or the boot
lid. #
Using the wheel wrench, loosen the wheel
bolts on the wheel you wish tochange by
about one full turn. Do not unscr ewthe bolts
comple tely. Po
sition of jack support points &
WARNING Risk of inju ryfrom incor rect
positioning of the jack
If yo u do not position the jack cor rectly at
th e appropriate jacking point of theve hicle,
th e jack could tip with theve hicle raised. #
Only position the jack at the appropri‐
ate jacking point of theve hicle. The
base of the jack must be positioned
ve rtically under the jacking point of the
ve hicle. Wheels and tyres
393

*
NO
TERisk of trapping the jack If
th e AIRMATIC sy stem has released air
when raising theve hicle, the jack can
become trapped when theve hicle is lo wered. #
Start the engine. This adapts theve hi‐
cle le vel. #
Remo vethe jack from under theve hi‐
cle. #
Tolowe r the vehicle: placethera tchet onto
th e he xagon nut of the jack so that the let‐
te rs "AB" are visible and turn anti-clockwise. #
Tighten the wheel bolts evenly in a diagonal
pattern in the order indicated 1to5 with
an initial maximum forc e of 80 Nm. #
Tighten the wheel bolts evenly in a diagonal
pattern in the order indicated 1to5 to
th e specified tightening torque of 150 Nm. &
WARNING Risk of accident due toincor‐
re ct tigh tening torque
The wheels could come loose if the wheel
bolts or wheel nuts are not tightened tothe
prescribed torque. #
Ensu rethat the wheel bolts or wheel
nuts are tightened tothe prescribed
tightening torque. #
Ifyo u are not sure, do not mo vethe
ve hicle. Contact a qualified specialist
wo rkshop and ha vethe tightening tor‐
qu ech ecked immediately. #
Check the tyre pressure of the newly fitted
wheel and adjust it if necessa ry. #
Vehicles with a tyre pressure monitoring
sy stem: restart the tyre pressure monitoring
sy stem (/ page 387).
Exception: the new wheel is an emer gency
spa rewheel. Emer
gency spare wheel Note
s onthe emer gency spare wheel &
WARNING Risk of accident caused by
incor rect wheel and tyre dimensions
The wheel or tyre size and the tyre type of
th e emer gency spa rewheel or spare wheel
and the wheel tobe replaced may dif fer. The
emer gency spa rewheel or spare wheel can
significantly impair driving characteristics of
th eve hicle.
To preve nt hazardous situations: #
Drive carefully. #
Neverfit more than one emer gency
spa rewheel or spare wheel that dif fers
in size. 396
Wheels and tyres

Note
s ontech nical data
The tech nical da tawa s de term ined in accord‐
ance with EU Directives. The data stated on ly
applies tovehicles with standard equipment. Yo u
can obtain fur ther information from a Mercedes-
Benz Service Centre.
Only for ce rtain countries: you can find vehi‐
cle-specific vehicle data in the COC documents
(CERTIFIC ATE OF CONFORMITY). These pape rs
are included with theve hicle. On-board electronics
Note
s on tampering with the engine elec‐
tronics *
NO
TEPremature wearthro ugh improper
main tenance Improper maintenance may cause
vehicle
components towe ar more quickly and the
ve hicle's operating permit may be in valida‐
te d. #
Alw ays ha vewo rkon the engine elec‐
tronics and related components car ried
out at a qualified specialist workshop. *
NO
TEIncreased wear and tear or dam‐
age caused bymeasu res under take nto
inc rease per form ance Engine management measures unde
rtaken to
inc rease per form ance can lead toinc reased
we ar and tear or damage tothe drive sy stem. #
Do not under take engine management
measures toinc rease per form ance. Tw
o-w ayradios Note
s onfitting two-w ayradios &
WARNING Risk of accident due to
improper workon two-w ayradios
If two-w ayradios are manipulated or retrofit‐
te d incor rectl y,the electromagnetic radiation
from the two-w ayradios can inter fere with th
eve hicle electronics and jeopardise the
operating saf ety of theve hicle. #
You should ha veall workon electrical
and electronic components car ried out
at a qualified specialist workshop. &
WARNING Risk of accident from incor‐
re ct ope ration of two-w ayradios
If yo u use two- wayra dios in theve hicle
improperly, their electromagnetic radiation
can disrupt theve hicle's electronics. This is
true in thefo llowing situations, in particular:
R The two-w ayradio is not connec tedto an
ex terior aerial.
R The exterior aerial is fitted inco rrectly or
is not a lo w-reflection aerial.
This could jeopardise the operating saf ety of
th eve hicle. #
Have the lo w-reflection exterior aerial
fi tted at a qualified specialist workshop. 398
Tech nical da ta

Manu‐
fa
ctu rer Model desig‐
nation Ra
dio equip‐
ment appr oval
number
Schrade rAG5SP4-D
(tyre pressure
monitoring
sensor) —
Ve oneer 77GHz MMRV1
(radar sensor) —
Ve oneer 77V12BSM
(radar sensor) EAЭC N
RUД-
US.ЭM03.B.
00 10 0/19 Manu‐
fa
ctu rer Model desig‐
nation Ra
dio equip‐
ment appr oval
number
Ve oneer 77V12CRN
(radar sensor) EAЭC N
RUД-
US.ЭM03.B.
00 10 2/19
WITTE-
Ve lbert SDHT
AG3NFC
(lo cking sys‐
te m) — Ve
hicle identification plate, VIN and engine
number overview
Ve hicle identification plate 478
Tech nical da ta