2021 MERCEDES-BENZ S-CLASS SALOON LONG fuel pressure

R
monthly
R when the load changes
R before embarking on a lon ger journey
R if operating conditions change, e.g. o.-
ro ad driving #
Adjust the tyre pressure, if necessar y.Ty
re pressure which is too high or too low can:
R Shor tenth e service life of the tyres.
R Cause increased tyre damage.
R Adve rsely a.ect driving characteristics and
th us driving saf ety, e.g. due toaquaplaning. &
W
WARNING
ARNING Risk of accident due torepea-
te d pressure drop in the tyres
The wheels, valves or tyres could be damaged.
To o low a tyre pressure can lead tothe tyres
bursting. #
Examine the tyres forfo re ign objects. #
Check whe ther the tyre has a puncture
or theva lve has a leak. #
Ifyo u are unable torectify the damage,
contact a quali/ed specialist workshop. Information on
there commended tyre pressure
fo rth eve hicle's factor y-/tted tyres can be found
on the tyre pressure table on the inside of the fuel
/ller 0ap (/ page 463).
Use a suitable pressure gauge tocheck the tyre
pressure. The outer appearance of a tyre does not
permit any reliable conclusion about the tyre pres-
sure.
Only cor rect tyre pressures when the tyres are
cold. Conditions for cold tyres:
R The vehicle has been par ked with the tyres out
of direct sunlight for at least thre e hours.
R The vehicle has tr avelled less than 1.6 km.
The vehicle's tyres heat up when driving. As the
te mp erature of the tyres increases, so too does
th e tyre pressure.
V V ehicles wit
ehicles wit h a tyr
h a tyre pr
e pressur
essur e monit
e monit or
oring syst
ing syst em:
em:
yo u can also see the tyre pressure in the driver's
displa y. N
N
o
ot
tes on tr
es on tr ailer oper
ailer oper ation
ation
Alw ays in0ate there ar axle tyres tothere com-
mended tyre pressures on the tyre pressure table
fo r increased load. T
T
yr
yr e pr
e pr essur
essur e t
e table
able The tyre pressure
table is on the inside of the fuel
/ller 0ap. Wheels and tyres
463
463

The tyre pressure
table sho ws there commended
tyre pressure for all tyres appr ovedfo rth is vehi-
cle. The recommended tyre pressures apply for
cold tyres under various operating conditions, i.e.
loading and/or speed of theve hicle.
If one or more tyre sizes precede a tyre pressure,
th efo llowing tyre pressure information is only
va lid forth ose tyre sizes and their respecti veload
condition.
If th e preceding tyre sizes are complemented by
th e+ symbol, the tyre pressure information
fo llowing sho wsalternative tyre pressures. Fuel
consum ption may then increase slightl y.
The load conditions "pa rtially laden" and "fully
laden" are de/ned in theta ble for di.erent num-
bers of passengers and amounts of luggage. The
actual number of seats may di.er from this. T T
yr
yr e pr
e pr essur
essur e monit
e monit or
oring syst
ing syst em
em F
F
unction of t
unction of t he tyr
he tyre pr
e pressur
essur e monit
e monit or
oring syst
ing syst em
em
The system checks the tyre pressure and the tyre
te mp erature of the tyres /t tedtotheve hicle by
means of a tyre pressure sensor. The tyre pressure and
the tyre temp erature
appear in the driver's displa y.
If th ere is a substantial pressure loss or if the tyre
te mp erature is excessive, you will be warned with
display messages (/ page 562) ortheh
wa rning lamp in the driver's display
(/ page 589).
The tyre pressure monitoring system is only an
aid. It is the driver's responsibility toset the tyre
pressure tothere commended cold tyre pressure
suitable forth e operating situation.
In most cases, the tyre pressure monitoring sys-
te m will automatically update the new refere nce
va lues aTer you ha vechanged the tyre pressure.
Yo u can, ho wever, also update there fere nce val-
ues byrestarting the tyre pressure monitoring
system manually (/ page 465).
Syst Syst em limits
em limits
The system may be impaired or may not function
particular lyin thefo llowing situations:
R incor rect refere nce values were ta ught in
R sudden pressure loss caused byafo re ign
object penetrating the tyre, forex ample R
there is a malfunction caused byano ther radio
signal source
Chec Chec king t
king t he tyr
he tyr e pr
e pressur
essur e wit
e with t
h the tyr
he tyr e pr
e pressure
essure
monit
monit or
oring syst
ing syst em
em
R
R eq
equir uir ements:
ements:
R The vehicle is switched on.
Driver's displ ay:
4 © 5
Service #
Press atocon/rm.
One of thefo llowing displa ysappears:
R Current tyre pressure of each wheel: 464
464
Wheels and tyres

Displa
Displa
y messag
y messag es P
es Possible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
High-voltage battery mal-
function. No start in
approx. XXX km Consult
workshop (red display mes-
sage) *A
malfunction has occur red in the high-voltage batter y.
It will no lon ger be possible tostart the electric drive system aTer the distance displa yed has been co vered.
It is still possible tostart the combustion engine. #
Have the necessary maintenance workon the high-voltage battery car ried out immediately at a quali/ed specialist
wo rkshop.
High-voltage battery mal-
function. Consult work-
shop without starting the
vehicle again *A
malfunction has occur red in the high-voltage batter y.
It will no lon ger be possible torestart the drive system once it has been switched o.. #
Do not switch o. the drive system; drive on tothe nearest quali/ed specialist workshop.
6 Please wait Depressurising
fuel tank *V
Vehicles wit ehicles wit h pe
h petr
trol engines:
ol engines: the pressure in the fuel tank is reduced before the fuel /ller 0ap is opened. The pressure
re duction can take up to15 minutes.
6 Fuel tank is depressurised
Ready for refuelling *V
Vehicles wit ehicles wit h pe
h petr
trol engines:
ol engines: the pressure in the fuel tank is released and the fuel /ller 0ap opens. 514
514
Display messages and
warning/indicator lamps

Û
Battery overheated Stop, every-
body out! Outdoors if possible ................ 511
Ø Beginning emer gency stop............ 542
J Brake immediate ly........................ 536
Á Change key batteries .................... 501
è Charger cable connected .............. 509
J Check brake 0uid le vel.................. 536
ï Check trailer hitch lock (white
display message) .................................... 517
h Check tyre(s) ................................ 563
! Clean the fuel /lter....................... 527
É Compressor is cooling .................. 552
ÿ Coolant Stop Switch o. the
ve hicle ................................................... 526
! currently una vailable See Own-
er's Manual............................................5 54
÷ currently una vailable See Own-
er's Manual............................................5 55
5 Engine oil le vel cannot be meas-
ured....................................................... 570 5
Engine oil le velRe duce oil le vel..... 569
5 Engine oil le velSt op Switch o.
th eve hicle ............................................. 569
5 Engine oil pressure Stop Switch
o. theve hicle ....................................... .570
ä Fault Drive at max. 80 km/h
...................................................... 549, 550
ä Fault Stop.................................... .551
6 Front leT malfunction Consult
wo rkshop (e xample)...............................4 97
6 Fueltank is depre ssurised
Re ady forre fuelling............................... .514
Û Have high- voltage system
ch ecked See Owner's Manual ................ 512
& inoperative Battery low................. 506
& Inoperative Char gehigh- voltage
battery................................................... 507
& inoperative High-voltage battery
ch arging inco mplete ............................... 507
& Inoperative Refuel vehicle ............ .506 &
inoperative See Owner's Man........ 506
! inoperative See Owner's Manual.. .555
÷ inoperative See Owner's Manual.. .556
T inoperative See Owner's Manual.. .557
G Inoperative................................... 558
¥ Intensive cleaning activated for
30 s....................................................... 525
Á Key being initialised Please wait.... 502
Á Key not de tected (red display
message)...............................................5 01
Á Key not de tected (white display
message)...............................................5 01
: LeT dipped beam (e xample).......... 502
6 LeT windowbag malfunction
Consult workshop (e xample).................. 498
: Malfunction See Owner's Man-
ual.........................................................5 03
Û Malfunction Visit workshop ........... 511
d Malfunction.................................. 512
Û Malfunction.................................. 511 Index
599 599

¢
Max. speed 20km/h..................... 551
ð Maximum speed exceeded ............ 540
ç O................................................. 539
ë O................................................. 537
ï Operation only possible in
transmission position P .......................... 516
! Parking brake See Owner's
Manual..................................................5 33
! Parking brake Switch on vehicle
to release.............................................. 536
È passive......................................... 538
d Performance se verely limited........ 513
Ý Please wait 48 V battery charg-
ing......................................................... 561
6 Please wait Depressurising fuel
ta nk....................................................... 514
& Pre-entry climate control via key
av ailable again aTer starting vehicle....... 507
& Pre-ent ryclimate cont rol via key
inoperative High-voltage battery low....... 508 Ù
Rear axle steering cur rently
malfunctioning ....................................... 520
Ù Rear axle steering Malfunction
St op immediately...................................5 21
Ù Rear axle steering Malfunction
Vi sit workshop ....................................... 520
h Rectify tyre pressure ..................... 564
Ø Re/ll AdBlue See Owner ’sMan-
ual ......................................................... 566
! Release parking brake ...................535
ý Replace air cleaner ....................... 528
Á Replace key.................................. 500
8 Reser vefuel le vel.......................... 527
6 Restraint system malfunction
Consult workshop ................................. .496
ð Restric ted during trailer opera-
tion........................................................ 548
# Start theve hicle tocharge the
12 V battery........................................... 560 Ù
Steering malfunction Drive
carefully Visit workshop ........................ .519
Ù Steering malfunction Increased
ph ysical e.ort See Owner's Manual.......5 19
Ù Steering malfunction Stop
immediately See Owner's Manual ........... 520
d Stop Switch o. theve hicle ............ 513
# Stop vehicle Lea ve vehicle on to
ch arge the 12 V battery ......................... 560
É STOP Vehicle le velto o low............ 551
# Stop vehicle See Owner's Man-
ual......................................................... 559
Û Stop vehicle See Owner's Man-
ual......................................................... 560
ç suspended .................................... 539
: Switch o. lights............................ 504
: Switch on headlamps .................... 504
á temp orarily una vailable Camera
view restric ted....................................... 547 600 600
Index

÷
ESP®
wa rning lamp 0ashes........... 586
÷ ESP®
wa rning lamp lights up.........5 87
8 Fuelreser vewarning lamp lights
up.......................................................... 581
H Mercedes-Benz emer gency call
system warning lam p............................. 588
Ù Power steering warning lamp
(red)...................................................... 576
Ù Power steering warning lamp
(yellow).................................................. 576
Ù Rear axle steering warning lamp
(red)...................................................... 577
Ù Rear axle steering warning lamp
(yellow).................................................. 577
_ Reduced warning lamp po wer....... 574
6 Restraint system warning lam p...... 573
ü Seat belt warning lamp 0ashes...... 574
ü Seat belt warning lamp lights up.... 574
ä Suspension warning lamp (red)..... 585 ä
Suspension warning lamp (yel-
low)....................................................... 585
Ú System error warning lamp........... 575
! The electric parking brake (yel-
low) indicator lamp. ................................ 581
ï Trailer tow hitch warning lam p....... 575
h Tyre pressure monitoring sys-
te m wa rning lamp 0ashes....................... 589
h Tyre pressure monitoring sys-
te m wa rning lamp lights up.................... 589
L Warning lamp for distance
wa rning function.................................... 584
Overview................................................ 571
PA SSENGER AIR BA G............................... 58
REAR SEAT AIR BAG................................. 62
W W arr
arr anty
anty........................................................ 40
W
W ashing b
ashing b y hand (car
y hand (car e)
e)................................ 431
W
W eat
eat her inf
her inf or
ormation
mation ..................................... 394
W
W eb brow
eb brow sers
sers
Overview................................................ 407 Wheel c
Wheel c
hange
hange
Fi tting a new wheel................................ 473
Lo we ring theve hicle.............................. 474
Preparation............................................ 470
Ra ising theve hicle................................. 471
Re moving a wheel................................. .473
Re moving//tting hub caps..................... 470
Wheel rot
Wheel rotation ation ............................................. 468
Wheels
Wheels Care...................................................... 433
Chec king............................................... 461
Checking the tyre pressure (tyre pres-
sure monitoring system)......................... 464
Fi tting.................................................... 473
Flat tyre................................................. 439
Inter changing......................................... 468
MOExtended tyres................................. 439
Noise..................................................... 461
No tes on /tting...................................... 465
Re moving............................................... 473
Re placing....................................... 465, 470
Re placing the hub cap............................ 470
Re starting the tyre pressure monitor-
ing system............................................. 465
Selection...............................................4 65624 624
Index