open bonnet MERCEDES-BENZ S-CLASS SALOON LONG 2021 User Guide

#
Have damaged tyres or chassis parts
re placed immediatel y. To
avo id damage toyour vehicle, obser vethefo l-
lowing when using a high-pressure cleaner:
R The key is at a minimum dis tance of 3 m away
from theve hicle. Otherwise the boot lid or a
door could open unintentionall y.
R Maintain a distance of at least 30 cm tothe
ve hicle.
R V
Vehicles wit
ehicles wit h decor
h decorativ
ative f
e foil:
oil: Parts of your
ve hicle are co vered with a decorative foil.
Maintain a distance of at least 70 cm between
th efo il-co vered parts of theve hicle and the
nozzle of the high-pressure cleaner. Mo vethe
high-pressure cleaner nozzle around whilst
cleaning. The waterte mp erature of the high-
pressure cleaner must not exceed 60°C.
R Obser vethe information on the cor rect dis-
ta nce in the equipment manufacturer's oper-
ating inst ructions.
R Do not direct the nozzle of the high-pressure
cleaner directly at sensitive parts, such as tyres,
gaps, electrical components, batteries,
light sources and ventilation slits. W W
ashing t
ashing t he v
he vehicle b
ehicle b y hand
y hand *
N
NOOTE
TE Engine damage due towa ter ing ress #
Take care not topoint thewa ter jet
directly towa rdsth e air inlet grille below
th e bonnet. obser
vethe legal requ irements, e.g. in a number
of countries, washing byhand is only permitted in
special lydesignated wash ba ys. #
Use a mild cleaning agent, e.g. car shampoo. #
Washtheve hicle with luk ewarm water using a
soT car sponge. When doing so, do not
ex pose theve hicle todirect sunlight. #
Carefully hose theve hicle o. with water and
dry using a chamois.
% Obser vethe no tes on the care of car parts
(/ page 433). N No
ot
tes on paintw
es on paintw or
ork/matt
k/matt /nish
/nishpaintw
paintw or
ork care
k care To
avo id damaging the paintwork and inter fering
with the driving assistance systems, please
obser vethefo llowing no tes:
P
P aint
aint
R Insect remains: soak with insect remo ver and
ri nse o. the treated areas aTer wards.
R Bird droppings: soak with water and rinse o.
aTer wards.
R Tree resin, oils, fuels and greases: remo veby
ru bbing gently with a clo thsoaked in petro-
leum ether or lighter 0uid.
R Coolant and brake 0uid: remo vewith a damp
clo thand clean water.
R Tar stains: use tarre mo ver.
R Wax: use silicone remo ver.
R Do not attach sti ckers, /lms or similar materi-
als. Only ha ve/lm attached tothe bumper at
a quali/ed specialist workshop.
R Remo vedirt immediatel y,where possible. Main
tenance and ca re
431
431

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

Opening
Opening
%
Depending on theve hicle equipment, access
to the fuse box may be limited. Mercedes-
Benz recommends consulting a quali/ed spe-
cialist workshop, e.g. a Mercedes-Benz
Se rvice Centre. &
W WARNING
ARNING Risk of injury from using the
windscreen wipers when the bonnet is
open
If th e windscreen wipers start moving when
th e bonnet is open, you could be trapped by
th e wiper linkage. #
Always switch o. the windscreen wipers
and vehicle before opening the engine
bonnet. #
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. #
Depending on theve hicle equipment, there
may be an electrical component 2onthe
fuse box lid. If present, unscrew screw 3 and
put the component tothe side without discon-
necting the electrical connection. #
If present, release hoses 4from thereta ining
clips on the fuse box and vehicle body. 458
458
Breakdown assis
tance

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
C *A
t least one door is open. #
Close all doors.
Bonnet unlatched Pull lever
again to open *T
he bonn etis not fully unloc ked. &
W WARNING
ARNING Risk of accident due todriving with the bonnet unloc ked
The bonnet may open and blo ckyour vie w. #
Neverre lease the bonnet when driving. #
Before every trip, ensure that the engine bonnet is loc ked. #
Toopen the bonnet full y,pull the handle again (/ page 424).
Bonnet not locked Close
before starting journey *T
he bonn etis not loc ked. &
W WARNING
ARNING Risk of accident due todriving with the bonnet unloc ked
The bonnet may open and blo ckyour vie w. #
Neverre lease the bonnet when driving. #
Before every trip, ensure that the engine bonnet is loc ked. #
Close the bonnet (/ page 424). 522
522
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
Bonnet not locked Stop
immediately Close bonnet
completely *T
he bonn etis not loc ked. &
W WARNING
ARNING Risk of accident due todriving with the bonnet unloc ked
The bonnet may open and blo ckyour vie w. #
Neverre lease the bonnet when driving. #
Before every trip, ensure that the engine bonnet is loc ked. #
Stop theve hicle immediately in accordance with the tra1c conditions. #
Close the bonnet (/ page 424).
M *T
he bonn etis open. &
W
WARNING
ARNING Risk of accident due todriving with the bonnet unloc ked
The bonnet may open and blo ckyour vie w. #
Neverre lease the bonnet when driving. #
Before every trip, ensure that the engine bonnet is loc ked. #
Stop theve hicle immediately in accordance with the tra1c conditions. #
Close the bonnet. Display messages and
warning/indicator lamps
523
523

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
Cannot start vehicle See
Owner's Manual *T
hevehicle cann otbe star ted. #
Switch theve hicle o. and switch it back on #
Ifth e display message still appears, consult a quali/ed specialist workshop.
+
Top up coolant See Own-
er’s Manual *T
he coolant le vel is too lo w.
* N NO
OTE
TE Engine damage due toinsu1cient coolant #
Avoid long journe yswith insu1cient coolant. #
Add coolant (/ page 428). #
Have the engine cooling system checked at a quali/ed specialist workshop.
ÿ
Coolant Stop Switch off
the vehicle *T
he coolant is too hot. #
Stop immediately in accordance with the tra1c conditions and switch o. theve hicle. &
W WARNING
ARNING Risk of burns when opening the bonnet
If yo u open the bonnet in theev ent of an overheated engine or /re in the engine compartment, thefo llowing situa-
tions may occur:
R You may come into contact with hot gases.
R You may come into contact with other escaping hot operating 0uids. 526
526
Displ
aymessages and warning/indicator lamps

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions #
Before opening the bonnet, allow the engine tocool down. #
Intheev ent of a /re in the engine compartment, keep the bonnet closed and call the /re 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 quali/ed specialist workshop. In doing so, ensu rethat the
coolant temp erature display remains below 120°C.
ÿ *T
here is a malfunction in the engine cooling system. #
Avoiding high loads on the engine, drive tothe nearest quali/ed specialist workshop. In doing so, ensu rethat the
coolant temp erature display remains below 120°C.
8
Reserve fuel level *T
he fuel supply has dropped into there ser verange. #
Refuel.
! Clean the fuel filter *V
Vehicles wit
ehicles wit h diesel engines:
h diesel engines: the fuel /lter is dirty or thewa ter in the fuel /lter needs tobe drained. #
Consult a quali/ed specialist workshop. Displ
aymessages and warning/indicator lamps
527
527

Engine
Engine
W
W
ar
ar ning/indicat
ning/indicat or lampP
or lam pP ossible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
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. &
W
WARNING
ARNING Risk of burns when opening the bonnet
If yo u open the bonnet in theev ent of an overheated engine or /re in the engine compartment, thefo llowing situa-
tions may occur:
R You may come into contact with hot gases.
R You may come into contact with other escaping hot operating 0uids. #
Before opening the bonnet, allow the engine tocool down. #
Intheev ent of a /re in the engine compartment, keep the bonnet closed and call the /re service. #
Stop immediately in accordance with the tra1c conditions and switch o. theve hicle. Do not continue driving. 578
578
Displ
aymessages and warning/indicator lamps

Tr
ailer operatio n..................................... 494 B
B
Bad w
Bad w eat
eather light
her light ......................................... 174
Bag hook
Bag hook..................................................... 155
Ball neck Ball neck Extending/r etra cting............................. .337
Extending/r etra cting (MBUX multime-
dia system)............................................ 339
B
B AS (Br
AS (Br ak
ake Assis
e Assis t Syst
t System)
em), Brake Assist
System, Braking assistance, Emer gency
braking........................................................ 269
Batt Batt ery
ery
Re mo tecont rol (stationary heater)......... 204
Batt
Batt er
ery (ke
y (ke y)
y)
Re placing................................................. 90
Batt
Batt er
ery (v
y (v ehicle)
ehicle)
Charging (Remo teOnline)...................... 213
No tes..................................................... 444
No tes (starting assis tance and charg-
ing)........................................................ 446
Batt
Batt er
ery oper
y oper ation
ation, Hybrid system.................. 208 Belt airbag
Belt airbag
Activation................................................ 46
Fu nction/no tes....................................... .50
Bicy
Bicy cle r
cle r ack
ack
Load capacit y........................................ 494
Tr ailer operatio n.................................... .342
Bonnet
Bonnet Function (active bonnet)......................... 424
Opening/closing.................................... 424
Boos
Boost pr t pressur
essur e (dr
e (driv
iver display
er display , Sport
, Sport
menu)
menu).......................................................... 347
Boo Boo t lid
t lid
Ac tivating/deactivating the limiter.......... 104
Closing.................................................... 99
HANDS-FREE ACCESS........................... 101
Opening................................................... 98
Opening dimensions.............................. 491
Po we r closing function............................. 99
Switching the separate locking fea-
ture on/o............................................. 103
Unlocking (emer gency key).................... 103
Br Br ak
ak e
e0uid
0uid
No tes..................................................... 489 Br
Br
ak
ak e f
e f or
orce disce distr tribution
ibution
EBD (Elect ronic Brake forc e Distribu-
tion).......................................................2 71
Br
Br ak
ak es
es
ABS (Anti-lock Braking System).............. 269
Ac tive Brake Assist................................. 290
Ad aptive brake lights.............................. 273
BAS (Brake Assist System).................... .269
Driving tips............................................ 215
EBD (Electronic Brake forc e Distribu-
tion).......................................................2 71
HOLD function....................................... 272
Limited braking e.ect (salt-treated
ro ads)................................................... .215
Ne w/replaced brake linings/brake
discs...................................................... 214
Po st-collision brak e.................................. 64
Ru nning-in no tes.................................... 214
Br Br eakdo
eakdo wn
wn
Assistance overview. ................................ 20
To w- starting........................................... 456
To wing away.......................................... 451
Tr anspo rting theve hicle........................ .453
Wheel chang e........................................ 470 594
594
Index

Ac
tive Stop-and-Go Assist cur rently
una vailable see Owner's Manual .............543
Ac tive Stop-and-Go Assist inoperative
See Owner's Manual.............................. 543
Ad aptive Highbeam Assist Plus cur-
re ntly una vailable See Owner's Manual ... 505
Ad aptive Highbeam Assist Plus inop-
erative.................................................. .505
Ambient light warning support inoper-
ative...................................................... 524
Anti-theT alarm system Malfunction .......524
Apply brake and start vehicle toshiT
out of P or N.......................................... 528
Apply brake todeselect P position .......... 528
Apply brake toengage D or R ................. 529
Apply brake toengage R ......................... 529
Apply parking brake topark Visit
wo rkshop ............................................... 529
Au xiliary battery malfunction (red dis-
play message) ....................................... .532 Au
xiliary battery malfunction (white
displ aymessage) .................................... 532
Bonnet not loc ked Close before start-
ing journey............................................. 522
Bonn etnot loc kedSt op immediately
Close bonnet comple tely........................ 523
Bonnet unlatched Pull le ver again to
open...................................................... 522
Cannot start vehicle See Owner's
Manual.......................................... 526, 561
Change steering wheel/ seat position
until 6 dots are visible on the upper
edge of the screen................................. 549
Charging fault Please change charging
me thod See Owner's Manual .................510
Check brake pads See Owner's Man-
ual......................................................... 537
Check dipped-beam setting (leT/
ri ght-side tra1c) .................................... 504 Consult
workshop without changing
th e transmission position ............... 512, 531
Consult workshop without starting the
ve hicle again .......................................... 512
DC charging inoperative Consult
wo rkshop ............................................... 510
DIGITAL LIGHT Functions limited............ 504
Dipped-beam setting (leT/ right-side
tra1c) Manual adjustment on ly.............. 505
Drive malfunction Stop Consult work-
shop ...................................................... 532
Drive malfunction Stop Restart vehicle ... 531
Drive overheated. Drive on with care ......532
Driver camera inoperative See Own-
er's Manual............................................ 549
Driver camera view cur rently restric-
te d See Owner's Manual........................ 548
Fr ont passenger airbag disabled See
Owner's Manual .................................... .498 602 602
Index