2018 MERCEDES-BENZ S-CLASS COUPE sensor

Observethefo llowing information:
Information on cleaning and car eAvoiding vehicle damage
Wheels/rims Usewate r and acid-free wheel cleaners.
RDo not use acidic wheel cleaners toremo vebrake dust.
This could damage wheel bolts and brake components.
RTo avoid cor rosion of the brake discs and brake pads,
drive theve hicle for a few minutes af ter cleaning before
parking it. The brake discs and brake pads warm up and
dr y out.
Wi ndo ws
Cleanthe windo wsonthe inside and outside using a damp
clo thand cleaning agents recommended byMercedes-Benz. Do not use dry clo
ths or abrasive or sol vent-based cleaning
agents toclean the inside of windo ws.
Wi per blades
Fold out the wiper blades and clean them using a damp clo th.D o not clean the wiper blades too of ten.
Ex terior lighting
Cleanthe lenses with a wet sponge and mild cleaning agent,
e.g. car sha mpoo. Only use cleaning agents or cleaning clo
thsth at are suitable
fo r plast ic lenses.
Sensors Cleanthe sensors in the front and rear bumper and in the
ra diator trim with a soft clo thand car shampoo. When using a high-pressure
water jet, maintain a minimum
dis tance of 11.8 in (30 cm).
Maintenance and care 337

The system checks the tire pressure and the tire
te mp erature of the tires ins talled on theve hicle
by means of a tire pressure sensor.
New tire pressure sensors, e.g. in winter tires,
are automatically taught-in during thefirs t jour‐
ney they are used.
If th ere is a subs tantial pressure loss or if the
tire temp erature is excessive, a warning will be
given:
Rvia display messages (→page 429)
Rvia theh warning lamp in the instrument
clus ter (→page 462)
It is the driver's responsibility toset the tire
pressure tothere commended cold tire pressure
suitable forth e operating situation. Set the tire
pressure for cold tires using a tire pressure
ga uge. Notethat the cor rect tire pressure forth e
cur rent operating situation must firs t be taught-
in to the tire pressure monitoring sy stem.
In most cases, the tire pressure monitoring sys‐
te m will auto matically update the new refere nce
va lues af teryo u ha vechanged the tire pressure.
Yo u can, ho wever,also update there fere nce val‐ ues
byrestarting the tire pressure monitoring
sy stem manually (
→page 368).
Sy stem limitations
The sy stem may be impaired or may n
ot function
in thefo llowing situations:
RIf th e tire pressure is set incor rectly
RIfth ere is a sudden pressure loss caused, for
ex ample, byafo re ign object penetrating the
tire.
RIf th ere is a malfunction caused byano ther
ra dio signal source
Make sure toobser vethefo llowing fur ther rela‐
te d subjec t:
RNotes on tire pressure (→page 363)
Checking the tire pressure with the tire pres‐
sure moni toring sy stem
Requ irements:
RThe ignition is switched on. On-board computer:
,Service.Tires
One of thefo llowing displa ysappears:
RCur rent tire pressure of ea chwheel:
RTire pressure will be displayed after driving a
few minutes
RTire Pressure Monitor Active: thete ach-in
process of the sy stem is not yet comple te.
The tire pressures are already being moni‐
to re d.
#Compare the tire pressure with there com‐
mended tire pressure forth e cur rent operat‐
ing status (
→page 364). Observ eth e no tes
on tire temp erature (→page 363).
% The values displa yed in the multifunction dis‐
play may deviate from those of the tire pres‐
sure gauge as they referto sea le vel.At high
altitudes, the tire pressure values indicated
by pressure gauges are higher than those
shown bythe on-board computer. In this
case, do not reduce the tire pressure.
Wheels and tires 367

Observethefo llowing when selecting, ins talling
and replacing tires:
ROnly use tires and wheels of the same type
(summer tires, winter tires, MOEx tended
tires) and the same make.
ROnly ins tall wheels of the same size on one
axle (left and right).
It is only permissible toins tall a dif fere nt
wheel size in theeve nt of a flat tire in order
to drive tothe specialist workshop.
ROnly ins tall tires of the cor rect size onto the
wheels.
RVe hicles with a tire pressure monitoring
sy stem: all mounte d wheels must be equip‐
ped with functioning sensors forth e tire
pressure monitoring sy stem.
RAt temp eratures below 45 °F (7 °C), use win‐
te r tires or all-season tires mar ked M+S for
all wheels.
Wi nter tires bearing thei snowflake sym‐
bol in addition tothe M+S marking pr ovide
th e best possible grip in wintry road condi‐
tions.
RFo r M+S tires, only use tires with the same
tread.
RObser vethe maximum permissible speed for
th e M+S tires ins talled.
If th is is below theve hicle's maximum speed,
th is must be indicated in an appropriate label
in the driver's field of vision.
RRu n in new tires at moderate speeds forth e
fi rs t 60 miles (100 km).
RRe place the tires af ter six years at the latest,
re ga rdless of wear.
RWhen replacing with tires that do not fea‐
ture run-flat characteristics: vehicles with
MOExtended tires are not equipped with a
TIREFIT kit at thefa ctor y.Equip theve hicle
with a TIREFIT kit af terre placing with tires
th at do not feature run-flat characteristics,
e.g. winter tires.
Fo r more information on wheels and tires, con‐
ta ct a qualified specialist workshop.
Be sure toalso observ eth efo llowing fur ther
re lated subjects:
RNo tes on tire pressure (→page 363)
RTire and Loading Info rmation placard
(→page 369)
RTi re size designation, load-beari ng capacity,
speed rating and load ind ex(→page 376)
RTire pressure table (→page 364)
Note s onrotating wheels
&
WARNING Risk of injury thro ugh dif fer‐
ent wheel sizes
Inter changing the front and rear wheels if the
wheels or tires ha vediffere nt dimensions
may se verely impair the driving characteris‐
tics.
The wheel brakes or wheel suspension com‐
ponents may also be damaged.
#Ro tate front and rear wheels only ifth e
wheels and tires are of the same dimen‐
sions.
Wheels and tires 383

&WARNING ‑ Risk of fire and injury from
windshield washer concentrate
Wi ndshield washer concentrate is highly
fl ammable. It could ignite if it comes into
con tact wi thhot engine component parts or
th eex haust sy stem.
#Make sure that no windshield washer
concentrate spills out next tothefiller
opening.
* NO
TEBlocked spr aynozzles caused by
mixing windshield washer fluids
#Do not mix MB SummerFit and MB Win‐
te rFit with other windshield washer flu‐
ids.
Do not use distilled or de-ionized water asthefill
le ve l sensor may be triggered er roneously.
Re commended windshield washer fluid:
RAbo vefreezing point: e.g. MB SummerFit
RBelow freezing point: e.g. MB WinterFit Fo
rth e cor rect mixing ratio referto the informa‐
tion on the antif reeze conta iner.
Mix thewa sher fluid withth e windshield washer
fl uid all year round.
Re frigerant
Note s onrefrigerants
Obser vethe no tes on operating fluids
(
→page 395).
* NO
TEDama gedue toincor rect refriger‐
ant
If a non-appr ovedre frigerant is used, the cli‐
mate control sy stem may be damaged.
#Only use there frigerant R‑134a
* NO
TEDama getothe climate control
sy stem due toincor rect refrigerant com‐
pressor oil
#Only use refrigerant compressor oil that
has been appr ovedby Mercedes-Benz.
#Do not mix the appr ovedre frigerant
compressor oil with a dif fere nt refriger‐
ant compressor oil.
Wo rkon the climate control sy stem may only be
car ried out byaqu alified specialist workshop. All
applicable regulations, as well as SAEstandard
J639, must be adhered to.
1Wa rning symbols
2Re frigerant filling capacity
3Applicable standards
4PA G oil part number
5Re frigerant type
400
Tech nical da ta

Displaymessages
Possible causes/consequences and MSolutions
Radar Sensors Dirty See
Operator's Manual *T
heradar sensor sy stem is malfunctioning. Possible causes are:
Rsoiling of the sensors
Rheavy rain
Rex tended country driving wi thout other traf fic, e.g. in the desert
Driving sy stems and driving saf etysy stems may be malfunctioning or temp orarily una vailable.
Once the cause of the problem is no longer present, the driving sy stems and driving saf etysy stems will be available
again.
If th e display message does not disappear:
#Pull over and stop theve hicle safely as soon as possible, paying attention toroad and traf fic conditions.
#Clean all sensors .
#Restart the engine.
Display messages and warning/indicator lamps 41
5

Displaymessages
Possible causes/consequences and MSolutions
Active Blind Spot Assist
Currently Unavailable See
Operator's Manual *A
ctive Blind Spot Assist istemp orarily una vailable.
The sy stem limitations ha vebeen reached (
→page 198) (→page 199) (→pag e19 8).
#Drive on.
Once the cause of the problem is no longer present, the sy stem will be available again.
#Ifth e display message does not disappear, stop theve hicle while paying attention toroad and traf fic conditions
and restart the engine.
Active Blind Spot Assist
Inoperative *A
ctive Blind Spot Assist is malfunctioning.
#Visit a qualified specialist workshop.
Blind Spot Assist Currently
Unavailable See Operator's
Manual *B
lind Spot Assist is temp orarily una vailable.
The sy stem limitations ha vebeen reached (
→page 198) (→page 199) (→pag e19 8).
#Drive on.
Once the cause of the problem is no longer present, the sy stem will be available again.
or
#If th e display message does not disappear, stop theve hicle while paying attention toroad and traf fic conditions
and restart the engine.
#If necessar y,clean there ar bumper. If the bumper is extreme lydirty, the sensors in the bumper may be mal‐
functioning.
Blind Spot Assist Inopera-
tive *B
lind Spot Assist is malfunctioning.
#Visit a qualified specialist workshop.
422
Display messages and warning/indicator lamps

Displaymessages
Possible causes/consequences and MSolutions
h
Warning Tire Malfunction*T
he tire pressure in one or more tires has dropped suddenly. The wheel position is displa yed.
&
WARNING Risk of an accident from driving wi thaflat tire
Flat tires are dangerous in thefo llowing ways:
RThe tires can overheat and cause a fire .
RThe driving characteristics, as well as steering and braking, may be greatly impaired.
Yo u could then lose control of theve hicle.
#Do not drive with a flat tire.
#Observ eth e no tes on flat tires.
No tes on flat tires (→page 341).
#St op theve hicle, paying attention toroad and traf fic conditions.
#Check the tires.
Tire Press. Monitor Cur-
rently Unavailable *N
o signals can be receive d from the tire pressure sensors due tostro ngradio signal source inter fere nce. The tire
pressure monito ring sy stem is temp orarily una vailable.
#Drive on.
The tire pressure monitoring sy stem restarts automatically as soon as the cause has been rectified.
Display messages and warning/indicator lamps 431

Displaymessages
Possible causes/consequences and MSolutions
h
Wheel Sensor(s) Missing*T
here is no signal from the tire pressure sensor of one or more tires. The pressure of the af fected tire is not dis‐
play ed.
#Have thefa ulty tire pressure sensor replaced at a qualified specialist workshop.
Tire Pressure Monitor Inop-
erative No Wheel Sensors *T
he wheels fitted do not ha vesuitable tire pressure sensors. The tire pressure monitoring sy stem is deactivated.
#Mount wheels with suitable tire pressure sensors.
Tire Press. Monitor Inopera-
tive *T
he tire pressure monitoring sy stem is defective.
&
WARNING Thereis arisk of an accident if the tire pressure monitoring sy stem is malfunctioning
If th e tire pressure monitoring sy stem is malfunctioning, it is not able toissue a warning if there is pressure loss
in one or more of the tires.
Und erinflated tires ma y,forex ample, impair the driving, steering and braking characteristics.
#Ha ve the tire pressure monitoring sy stem checked at a qualified specialist workshop.
#Visit a qualified specialist workshop.
432
Display messages and warning/indicator lamps