2018 MERCEDES-BENZ S-CLASS SEDAN fuel pressure

RThe tires maywearexc essively and/or
une venly, which may greatlyimpair tire
traction.
RThe driving characteristics, as well as
st eering and braking, may be greatly
impaired.
#Comply with there commended tire
pressure and check the tire pressure of
all tires including the spare wheel regu‐
larly:
Rat least once a month
Rwhen the load changes
Rbefore embarking on a longe r journey
Rif operating conditionschange, e.g. off-
ro ad driving
#Ad just the tire pressure as necessar y.
Driving withtire pressure that is too high or too
low can:
RSho rten the service life of the tires.
RCause increased tire damage.
RAd versely af fect handling characteristics and
th us dr iving saf ety, e.g. due to hydroplaning.
&
WARNING Risk of an accident due to
insuf ficient tire pressure
Ti re s with pressure that is too low can over‐
heat and bur stas a result.
In addition, they also suf fer from excessive
and/or ir regular wear, which can significantly
impair the braking properties and the han‐
dling characteristics.
#Av oid excessively low tire pressures in
all the tires, including the spare wheel.
Tire pressure which is too low can cause:
RTire defects as a result of overheating
RImpaired handling characteristics
RIrre gular wear
RIncreased fuel consum ption
&
WARNING Risk of accident from exces‐
sive tire pressure
Ti re s with excessively high pressure can
burs t because they are damaged more easily
by highw ayfill, pot holes etc.
In addition, they also suf fer from ir regular
we ar, which can significantly impair the brak‐
ing properties and the handling characteris‐
tics.
#Av oid excessively high tire pressures in
all the tires, including the spare wheel.
Excessively high tire pressure can result in:
RIncreased braking dis tance
RImpaired handling characteristics
RIrre gular wear
RImpaired driving com fort
RSusceptibility todamage
Wheels and tires 41
5

&WARNING Risk of accident caused by
re peated drop in tire pressure
If th e tire pressure drops repeatedl y,the
wheel, valve or tire may be damaged.
Insuf ficient tire pressure can cause the tires
to bur st.
#Inspect the tire for signs of fore ign
objects.
#Check whe ther the wheel or valve has a
leak.
#If yo u are unab leto rectify the damage,
conta ct aqualified specialist workshop.
Yo u can find information on tire pressure forth e
ve hicle's factor y-mounted tires on thefo llowing
labels:
RTi re and Loading Info rmation placard on the
B‑pillar of your vehicle (→page 420).
RTire pressure table on the inside of the fuel
fi ller flap (→page 416).
Obse rveth e maximum tire pressure
(
→page 428). Use a suitable pressure
gauge tocheck the tire
pressure. The outer appearance of a tire does
not permit any reliable conclusion about the tire
pressure.
Ve hicles with a tire pressure monitoring sys‐
te m: You can also check the tire pressure using
th e on-board computer.
Only cor rect tire pressure when the tires are
cold. Conditions for cold tires:
RThe vehicle has been par ked with the tires
out of direct sunlight for at least th ree hours.
RThe vehicle has tr aveled less than 1 mile
(1.6 km).
A rise in the tire temp erature of 18°F (10 °C)
increases the tire pressure byappr ox.10 kPa
(0.1 bar/1.5 psi). Take this into account when
ch ecking the tire pressure of warm tires.
The tire pressure re commendedfor increased
load/speed in the tire pressure table can af fect
th eride comfort.
&
WARNING Risk of accident from unsuita‐
ble accessori es onthe tire valves
If yo u mount unsuitable accessories onto tire
va lves, the tire valves may be overloaded and
malfunction, which can cause tire pressure
loss. Tire pressure monitoring sy stems for
re trofitting will cause the tire valve toremain
open. This can also result in tire pressure
loss.
#Only scr ewstandard valve caps or valve
caps specifically appr ovedby
Mercedes-Benz foryo ur vehicle onto
th e tire valve.
Ti re pressure table
The tire pressure table is on the inside of the
fuel filler flap.
% The data shown in the images is example
data.
41 6
Wheels and tires

Further related subjects:
RNo tes on tire pressure (→page 414)
RTire pressure table (→page 416)
RTire and Loading Info rmation placard
(→page 420)
Ti re pressure moni toring sy stem
Fu nction of the tire pressure moni toring sys‐
te m
&
DANG ER Risk of accident due toincor‐
re ct tire pressure
Every tire, including the spare (if pr ovided),
should be checked when cold at least once a
month and inflated tothe pressure recom‐
mended bytheve hicle manufacturer (see
Ti re and Loading Info rmation placard on the
B-pillar on the driver ’sside or the tire pres‐
sure label on the inside of the fuel filler flap
of your vehicle). If your vehicle has tires of a
dif fere nt size than the size indicated on the
Ti re and Loading Info rmation placard or the
tire pressure table, you need todeterm ine
th e proper tire pressure forth ose tires.
As an added saf etyfe ature, your vehicle has
been equipped with a tire pressure monitor‐
ing sy stem (TPMS) that illuminates a low tire
pressure indicator lamp when one or more of
yo ur tires are signif icantly underinflated.
Ac cording ly, if the low tire pressure indicator
lamp lights up, you should stop and check
yo ur tires as soon as possible, and inflate
th em tothe proper pressure. Driving on a
significant lyunderinflated tire causes the tire
to ove rheat and can lead totire failure.
Und erinflation also increases fuel consump‐
tion and reduces tire tread life, and may
af fect theve hicle's handling and braking abil‐
ity. Please no tethat the TPMS is not a substi‐
tute for proper tire maintenance, and it is the
driver's responsibility tomaintain cor rect tire
pressure, even if underinflation has not
re ached the le velto trig ger illumination of
th e TPMS low tire pressure indicator lamp.
Yo ur vehicle has also been equipped with a
TPMS malfunction indicator toindicate whenthe sy stem is not operating properly. The
TPMS malfunction indicator is combined with
th e low tire pressure indicator lamp. When
th e sy stem de tects a malfunction, the indica‐
to r lamp will flash for app roxima tely a minute
and then remain continuously illumina ted.
This sequence will continue upon subsequent
ve hicle start-ups as long as the malfunction
ex ists.
When the malfunction indicator is illumina‐
te d, the sy stem may not be able todetect or
signal low tire pressure as intended. TPMS
malfunctions may occur for a variet yof rea‐
sons, including the ins tallation of incompati‐
ble replacement or alternate tires or wheels
on theve hicle that pr event the TPMS from
functioning proper ly.
Alw aysch eck the TPMS malfunction warning
lamp af terre placing one or more tires or
wheels on your vehicle toensure that the
re placement or alternate tires and wheels
allow the TPMS tocontinue tofunction prop‐
er ly.
41 8
Wheels and tires

Uniform Tire Quality Grading Standards: a
uniform standard tograde thequ ality of tires
with rega rd totread quality, tire traction and
te mp erature characteristics. The quality grading
assessment is made bythe manufacturer follow‐
ing specifications from theU. S. go vernment. The
qu ality grade of a tire is imprinted on the side
wa ll of the tire.
Re commended tire pressure :th ere commen‐
ded tire pressure is the tire pressure specified
fo rth e tires mounted totheve hicle at thefa c‐
to ry.
The tire and information table conta insthere c‐
ommended tire pressures for cold tires, the max‐
imum permissible load and the maximum per‐
missible vehicle speed.
The tire pressure table conta insthere commen‐
ded tire pressures for cold tires under various
operating conditions, i.e. loading and/or speed
of theve hicle.
Increased vehicle weight due tooptional
equipment: the combined weight of all standard
and optional equipment available forth eve hicle, re
ga rdless of whe ther it is actually ins talled on
th eve hicle or not.
Rim: the part of the wheel on which the tire is
ins talled.
GA WR (Gross Axle Weight Rating): the GAWR
is the maximum permissible axle load. The
actual load on an axle must ne verexc eed the
gros s axle weight rating. The gross axle
weight
ra ti

ng can be found on theve hicle identification
plate on the B‑pillar on the driver's side.
Speed rating: the speed rating is pa rtof the tire
identification. It specifies the speed range for
which a tire is appr oved.
GV W (Gross Vehicle Weight): the gross vehicle
we ight comprises thewe ight of theve hicle
including fuel, tools, the spare wheel, accesso‐
ri es ins talled, occupants, luggage and the trailer
dr aw bar nose weight, if applicable. The gross
ve hicle weight must not exceed the gross vehicle
we ight rating GVWR as specified on theve hicle
identification plate on the B‑pillar on the driver's
side.
GV WR (Gross Vehicle Weight Rating): the
GV WR is the maximum permitted gross weight of
the fully laden vehicle (weight of theve hicle
including all accessories, occupants, fuel, lug‐
ga ge and the trailer dr awbar nose weight if appli‐
cable). The grossve hicle weight rating is speci‐
fi ed on theve hicle identification plate on the
B‑pillar on the driver's side.
Maximum weight of the laden vehicle: the
maximum weight is the sum of the curb weight
of theve hicle, thewe ight of the accessori es,the
maximum load and thewe ight of optional equip‐
ment ins talled at thefa ctor y.
Kilopascal (kPa): metric unitfor tire pressure .
6.9 kPa cor responds to1 psi. Ano ther unit for
tire pressure is bar.
10 0 ki
lopascal (kPa) equals
1 bar.
Load index: in additiontothe load-bearing
index, the load index may also be imprinted on
th e side wall of the tire. This specifies the load-
bearing capacity of the tire more precisel y.
Curb weight: thewe ight of a vehicle with stand‐
ard equipment including the maximum capacity
of fuel, oil and coolant. It also includes the air
conditioning sy stem and optional equipment if
Wheels and tires 431

Displaymessages
Possible causes/consequences and MSolutions
¯
'() 6\VWHP )DXOW 3HUI
5HGXFHG LQ ;;; PO 6HH
2SHUDWRU
V 0DQXDO*T
he DEF sy stem is malfunctioning. Performance is limited abo vethe speed displa yed.
#Visit a qualified specialist workshop immediatel y.
Ø
5HILOO '()3HUI 5HGXFHG LQ
 PLOH V6H H2SHUDWRU
V
0DQXDO *T
he low DEF le vel leads tolimited per form ance af ter driving the dis tance displ ayed.
#Re fill DEF immediately .
% The message disappears af ter driving at a speed abo ve10 mph(1 5 km/h) for app roxima tely one minute.
8
*DV &DS /RRVH *T
here has been pressure loss in the fuel sy stem. The fuel filler cap is not closed cor rectly or the fuel sy stem is
leaking.
#Close the fuel filler cap.
#If th e fuel filler cap was already proper lyclosed: Consult a qualified specialist workshop.
8
)XHO /HYHO /RZ *T
he fuel le vel has dropped into there ser verange.
#Re fuel.
486
Display message s andwarning/indicator lamps

Instrument Display intheWi descreen Co ck‐
pit
Prog ressive setting (Widescreen Cockpit)
Ifyo u select the progressive display setting in
ve hicles with a Widescreen Cockpit, the position
of the indicator lamps in the Instrument Display
ch anges.
Wa rning and indicator lamps:
L Low beam (
→page
143)
T Pa
rking lights (
→page 143)
K High beam
(
→page14 4)
#! Tu
rn signal light (
→page 144)
R Re
ar fog light (
→page 143)
ü Seat belt is not
fastened
(
→page 510)
$ US
A: brakes (red) (
→page 503)
J Canada: brakes (red) (
→page 503)
! ABS malfunction (
→page 503)
÷ ESP
®(→page 503)
å ESP
®OFF (→page 503)
F USA: electric parking brake applied
(red) (
→page 503) !
Canada: electric parking brake
applied (red) (
→page 503)
! Electric parking brake (yellow
)
(
→page 503)
Ð St
eering assis tance malfunction
(
→pa ge 512)
# Electrical malfunction (
→page
513)
6 Re
stra int sy stem (
→page 503)
; Check Engine (
→page
513)
8 Fu
elreser vewith fuel filler cap loca‐
tion indicator (
→page 513)
? Coolan
tto o hot/cold (
→page 513)
· Dis
tance warning (
→page 511)
h Ti
re pressure monitoring sy stem
(
→page 517)
50 2
Displ aymessage s andwarning/indicator lamps

Engine
Warning/indicator lamp
Possible causes/consequences and MSolutions
;
Engine diagnosiswarning
lamp The
yellow engine diagnosis warning lamp is lit while the engine is running.
A malfunction has occurr ed inthe engine, theex haust sy stem or the fuel sy stem.
The emissions limit values may be exceeded and the engine may be running in emergency operation mode.
In some states, legal requ irements stipulate that you must immediately consult a qualified specialist workshop as soon
as theye llow engine diagnosis warning lamp lights up.
#Ha ve theve hicle checked as soon as possible at a qualified specialist workshop.
#
Electrical malfunction warn‐
ing lamp The
red electri cal malfunction warning lamp is lit.
There is a malfunction in the electrics.#Obser vethe messages in the multifunction displa y.
8
Fuelreser vewarning lamp The
yellow fuel reser ve wa rning lamp lights up while driving.
There has been pressure loss in the fuel sy stem. The fuel filler cap is not closed cor rectly or the fuel sy stem is leaking.#Close the fuel filler cap.
#If th e fuel filler cap was already proper lyclosed: consult a qualified specialist workshop.
Display messages and warning/indicator lamps 51
3

Setting ................................................. 235
Ac tive Steering Assist ............................ .204
Ac tivating/deactivating .......................2 06
Ac tive Emergency Stop Assist .............2 07
Ac tive Lane Change Assi st.................. 206
Displa ysinthe Instrument Display ...... 208
Fu nction .............................................. 204
Sy stem limitations .............................. .204
Ad aptive cruise control
see Active Dis tance Assist DISTRONIC
Ad aptive Highbeam Assist
Fu nction .............................................. 146
Switching on/off ................................. 147
Ad ditive s.................................................. 449
Engine oil ............................................ 449
Fu el ..................................................... 449
Ad ditive s (engine oil)
see Additives
Ad ditive s (fuel)
see Fuel
Ad dress book
see Contacts Ad
justing the balance/ fader
Burmes ter®high-end 3D sur round
sound sy stem ...................................... 360
Burmes ter
®sur round sound sy stem ... 359
Ad justing the bass, mid- range and
treble
Burmes ter
®high-end 3D sur round
sound sy stem ...................................... 359
Ad justing the mid- range, treble and
bass
Burmes ter
®high-end 3D sur round
sound sy stem ...................................... 359
Ad justing the sound focus
Burmes ter
®sur round sound sy stem ... 359
Ad justing the s
ound optimization
Burmes ter®high-end 3D sur round
sound sy stem ...................................... 360
Ad justing treble, mid- range and bass
settings
Burmes ter
®high-end 3D sur round
sound sy stem ...................................... 359
ADS PLUS damping sy stem
see AIR BODY CONTROL Af
ter-sales service center
see ASS YST PLUS
Air bag ........................................................ 38
Ac tivation .............................................. 32
Belt air bag ............................................ 36
Cushionbag ........................................... 38
Fr ont air bag (driver, front passenger) ... 38
Ins tallation locations ............................ .38
Knee air bag .......................................... 38
Overview ............................................... 38
Pr otection ............................................. .39
Re duced pr otection .............................. .40
Side air bag ........................................... 38
Wi ndow air bag ...................................... 38
AIR BODY CONT ROL................................ .211
Setting ................................................. 213
Suspension .......................................... 211
Air dis tribution
Setting (multimedia sy stem) ............... .159
Air freshener sy stem
see Frag rance sy stem
Air pressure see Tire pressure
520
Index