2021 MERCEDES-BENZ S-CLASS SALOON LONG ECU

Obser
vethe additional following points when
ch arging the batter y:
R Only use battery charge rs tested and
appro vedfo r Mercedes-Benz.
R Read the battery charge r's operating inst ruc-
tions before charging the batter y.
Obser vethe additional following points during
starting assistance:
R Starting assis tance may only be pr ovided
using vehicles, batteries or other jump start
devices with a nominal voltage of 12 V.
R The vehicles must not touch.
R V
Vehicles wit
ehicles wit h a pe
h a petr
trol engine:
ol engine: jump-start the
ve hicle only when the engine and exhaust sys-
te m are cold. S
S
t
tar
ar ting assist
ting assist ance and c
ance and c har
harging t
ging t he 12 V batt
he 12 V batt ery
ery Pr
Pr
epar
epar ing f
ing for st
or st ar
arting assist
ting assist ance/t
ance/the c
he char
harging
ging
pr
pr ocess
ocess #
Secure theve hicle byapplying the electric
parking brake. #
ShiT the transmission toposition j. #
Switch o. theve hicle and all elect rical con-
sumers. #
Open the bonnet. #
Open co ver1. #
Slide pr otective co ver2 of POSITIVE contact
3 onthe jump-start connection point in the
direction of the ar row. S
S
t
tar
ar ting assist
ting assist ance
ance #
Connect the POSITIVE contacts of theve hi-
cles with the jump lead. Start with your own
ve hicle /rst. #
Start the engine of the donor vehicle and run
it at idling speed. #
Connect the negative term inal of the donor
battery toear thpoint of your vehicle 4using 448
448
Breakdown assis
tance

%
Ifth eve hicle is raised totransport le vel,the
transport settings will continue tobe shown
ev en aTer a restart. Operation of the driver's
display is meanwhile restric ted.
When theve hicle is at transport le vel, it is lo wered
again in thefo llowing situations:
R When driven faster than 40 km/h.
R The 12 V battery is dischar ged. The
vehicle is adjusted tothe height of the last
active le vel.
T
T r
ranspor
anspor ting t
ting the v
he vehicle
ehicle #
Load theve hicle onto the transpor ter. #
ShiT the transmission toposition j. #
Use the electric parking brake tosecure the
ve hicle against rolling away. #
Switch o. theve hicle and the po wer suppl y. #
Only secure theve hicle bythe wheels.
4MA
4MA TIC v
TIC v ehicles
ehicles #
Make sure that the front and rear axles come
to rest on the same transpor tation vehicle. *
N
NOOTE
TE Damage tothe drive train due to
incor rect positioning of theve hicle #
Do not position theve hicle abo vethe
connection point of the transport vehi-
cle. U
Unloading t
nloading t he v
he vehicle
ehicle #
Make sure that theve hicle is raised totrans-
port le vel before unloading (/ page 453).
Low
Low er
ering t
ing t he v
he vehicle
ehicle aTer
aTerunloading
unloading #
Switch on the po wer suppl y. #
Start theve hicle. #
Swipe upward in the transport settings to
select Standard level and pressa.
The vehicle is adjusted tothe height of the last
active le vel and theLowering vehicle message
is displa yed. #
ATer theve hicle has been lo wered, press the
G button for at least two seconds.
The transport settings are closed. Breakdown assistance
455
455

Electr
Electr
ical fuses
ical fuses N
No
ot
tes on electr
es on electr ical fuses
ical fuses &
W
WARNING
ARNING Risk of accident and injury due
to ove rloaded lines
If yo u manipulate or bridge a faulty fuse or if
yo ure place it with a fuse with a higher amper-
age, the electric line could be overloaded.
This could result in a /re. #
Alwaysre place faulty fuses with speci-
/ed new fuses containing the cor rect
amperage. *
N
NOOTE
TE Damage due toincor rect fuses Electrical components or systems may be
damaged
byincor rect fuses, or their function-
ality may be signi/cantly impaired. #
Only use fuses that ha vebeen appr oved
by Mercedes-Benz and which ha vethe
cor rect fuse rating. Blown fuses must be
replaced with fuses of the
same rating, which you can recognise bythe col- our and fuse
rating. The fuse ratings and fur ther
information tobe obser ved can be found in the
fuse assignment dia gram.
F F use assignment diagr
use assignment diagr am:
am:intheve hicle docu-
ment wallet.
* NO
NOTE
TEDamage or malfunctions caused by
moisture Moisture may cause damage
tothe electrical
system or cause it tomalfunction. #
When the fuse box is open, make sure
th at no moisture can enter the fuse box. #
When closing the fuse box, make sure
th at the seal of the lid is positioned cor-
re ctly on the fuse box. If
th e ne wlyinser ted fuse also blo ws, ha vethe
cause traced and recti/ed at a quali/ed specialist
wo rkshop.
Ensure thefo llowing before replacing a fuse:
R The vehicle is secured against rolling away.
R All electrical consume rsare switched o..
R The vehicle is switched o.. The elect
rical fuses are located in thefo llowing
fuse bo xes:
R Fuse box in the engine compartment on the
driver's side (/ page 457)
R Fuse box on the driver's side of the cockpit
(/ page 459)
R Fuse box in the front passenger foot we ll
(/ page 460)
R Fuse box in the boot on theright-hand side of
th eve hicle, when vie wed in the direction of
tr av el (/ page 460) Opening and closing t
Opening and closing t
he fuse bo
he fuse box in t
x in the engine
he engine
com
com par
partment
tment R
R
eq
equir uir ements:
ements:
R Obser vethe no tes on elect rical fuses
(/ page 457).
R Have thefo llowing tools readily available:
- a dry clo th
- a scr ewdriver with an appropriate head Breakdown assistance
457
457

#
Ensure that the wheel bolts or wheel
nuts are tightened tothe prescribed
tightening torque. #
Ifyo u are not sure, do not mo vetheve hi-
cle. Con tact a quali/ed specialist work-
shop and ha vethe tightening torque
ch ecked immediatel y. #
Check the tyre pressure of the ne wly/tted
wheel and adjust it if necessar y.
% The following does not apply if the new wheel
is an emer gency spa rewheel. #
V
Vehicles wit
ehicles wit h a tyr
h a tyre pr
e pressur
essur e monit
e monit or
oring sy
ing sy s-
s-
t
t em:
em: restart the tyre pressure monitoring sys-
te m (/ page 465). Emerg
Emerg
ency spar
ency spar e wheel
e wheel N
No
ot
tes on t
es on t he emerg
he emerg ency spar
ency spar e wheel
e wheel &
W
WARNING
ARNING Risk of accident caused by
incor rect wheel and tyre dimensions
The wheel or tyre size and the tyre type of the
emer gency spa rewheel or spare wheel and
th e wheel tobe replaced may di.er. The emer-
ge ncy spa rewheel or spare wheel can signi/-
cantly impair driving characteristics of the
ve hicle.
To prev ent hazardous situations: #
Drive carefull y. #
Never /t more than one emer gency
spa rewheel or spare wheel that di.ers
in size. #
Only use an emer gency spa rewheel or
spare wheel brie0y. #
Do not deacti vate ESP ®
. #
Have the emer gency spa rewheel or
spare wheel of a di.erent size replaced
at the nearest quali/ed specialist work- shop. The new wheel must ha
vethe cor-
re ct dimensions. %
The emer gency spa rewheel is secured in the
emer gency spa rewheel bag in the boot.
Obser vethefo llowing no tes on /tting an emer-
ge ncy spa rewheel:
R The maximum permissible speed with an
emer gency spa rewheel /tted is 80 km/h.
R Do not /t the emer gency spa rewheel with
snow chains.
R Replace the emer gency spa rewheel aTer six
ye ars at the latest, rega rdless of wear.
R Use the wheel bolts that are included with the
emer gency spa rewheel.
Speci/ed Speci/ed tight
tightening t
ening t orq
orque:
ue: 130 Nm
R Check the tyre pressure of the emer gency
spa rewheel /tted. Cor rect the pressure as
necessar y.
% The speci/ed tyre pressure is stated on the
label of the emer gency spa rewheel. Wheels and tyres
475
475

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions #
Stop theve hicle immediately in accordance with the tra1c conditions. #
Make sure that no objects are trapped under the front passenger seat. #
Check the status of automatic front passenger airbag actuation (/ page 58).#
If necessar y,consult a quali/ed specialist workshop immediatel y.
Front passenger airbag ena-
bled See Owner's Manual *T
he front passen ger airbag will be enabled while theve hicle is in motion in thefo llowing situations:
R even when a child, a small adult or an object weighing less than the system weight thre shold is located on the front
passenger seat
R even when the front passenger seat is not occupied
The system may de tect objects or forc es that are adding tothewe ight applied tothe seat. &
W WARNING
ARNING Risk of injury or death when using a child restraint system while the front passenger airbag is ena-
bled
If yo u secure a child in a child restraint system on the front passenger seat and the front passenger airbag is ena-
bled, the front passenger airbag can deploy in theev ent of an accident.
The child could be struck bythe airbag. #
Ensure, bo thbefore and during the journe y,that the status of the front passenger airbag is cor rect.
NEVER use a rear wa rdfacing child restraint on a seat pro tected byan ACTIVE AIRBAG in front of it, DEATH or
SERIOUS INJURY tothe CHILD can occur. Display messages and
warning/indicator lamps
499
499

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
If th e driver's display fails, you may not recognise function restrictions a.ec ting systems releva nt tosaf ety or the
speed displa y,forex ample. The operating saf ety of theve hicle may be impaired (/ page 382). #
Have theve hicle checkedby aqu ali/ed specialist workshop immediatel y.
d
Vehicle is operational
Switch off vehicle before
exiting *Y
ou are leaving theve hicle in a ready-to-drive state. #
Get out of theve hicle, secure it against rolling away and take theke y with you. #
Ifyo u do not lea vetheve hicle, switch o. the electrical consumers, e.g. the seat heating. Otherwise, the 12‑V bat-
te ry may dischar geand starting the engine may be possible only with the help of a second battery (jump start).
ï
Operation only possible in
transmission position P *T
he ball neck will not swivel because transmission position h,kor neutral iis selected. #
Depress the brake pedal. #
Engage park position j.
ï Trailer coupling in motion *T
he ball neck is retracting/extending.
Do not attem pttospeed up, slow down or initiate the swivel mo vement using your hand, foot or other aids. During the
swivel mo vement, do not couple a trailer.
When the ball neck has reached an operational position, the display message will disappear. 516 516
Display messages and
warning/indicator lamps

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
ï
Check trailer hitch
lock (white display message) *T
he trailer hitch is not operational during a jou rney with a trailer. &
W WARNING
ARNING Risk of an accident if the ball neck is not loc ked
The trailer may become de tach ed. #
Stop theve hicle immediately in accordance with the tra1c conditions. Do not continue driving. #
Uncouple the trailer and secure it against rolling away. #
Initiate a new swivelling procedu reand do not re-couple the trailer until the display message disappears. #
Initiate a new swivel mo vement (/ page 337). #
When the display message disappears, couple up the trailer and drive on.
If th e display message does not disappear, the trailer hitch is malfunctioning and the ball neck is not loc ked. #
Do not couple up the trailer. Drive on without the trailer. No tethere duced ground clearance due tothe unloc ked
ball nec k. #
Consult a quali/ed specialist workshop.
*W hen theve hicle is stationary with a coupled trailer, the trailer hitch is not operational. #
Uncouple the coupled trailer and secure it against rolling away. #
If t
If the ball nec
he ball nec k has been re
k has been retr
tract
act ed:
ed: initiate a new swi vel mo vement (/ page 337).
The ball neck will engage vertically in the loc ked position and then engage beneath the bumper. Display messages and
warning/indicator lamps
517
517

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions #
Change the transmission position.
Apply brake to engage D or
R *Y
ou ha veattem pted toselect transmission position hork. #
Depress the brake pedal. #
Select transmission position hork.
Apply brake to engage R *You ha veattem pted toselect transmission position k. #
Depress the brake pedal. #
Select transmission position k.
Apply parking brake to
park Visit workshop *A
malfunction has occur red in the emer gency po wer supply topark position j. #
Consult a quali/ed specialist workshop. #
Until then, alw ays select park position jmanually before you switch o. theve hicle. #
Before leaving theve hicle, apply the electric parking brake.
Risk of vehicle rolling away
Driver's door open Trans-
mission not in P *T
he driver's door is not fully closed and transmission position h,kor neutral iis selected.
The vehicle may rollawa y. #
Select pa rkposition jwhen switching o. theve hicle.
Risk of vehicle rolling away
Apply parking brake to park *T
he transmission is malfunctioning. Park position jcannot be selected. #
Park theve hicle safel y. #
Use the electric parking brake tosecure theve hicle against rollingaway. Display messages and
warning/indicator lamps
529 529