2018 MERCEDES-BENZ SLC ROADSTER tire pressure

MOExtended tires (tires with run-flat
properties)
General notes
With MOExtended tires (tires with run flat char-
acteristics), you can continue to drive you rvehi-
cle even if there is atotal loss of pressure in one
or more tires. The affected tire must not show
any clearly visible damage.
You can recognize aMOExtended tire by the
MOExtended marking which appears on the
sidewal lofthe tire. You wil lfind this marking
next to the tire size designation, the load-bear-
ing capacity and the speedi ndex (
Ypage275).
MOExtended tires may only be use dinconjunc-
tion with an active tire pressure loss warning
system or with an active tire pressure monitor.
If ap ressure lossw arningmessagea ppears
in the multifunction display:
Robserve the instructions in the display mes-
sage s(Ypage1 96)
Rcheck the tire for damage
Rif driving on, observe the following notes
The driving distance possible in run-fla tmode is
approximately 50 mile s(80 km) when the vehi-
cle is partiall yladen and approximately 19 miles
(30 km) when the vehicleisf ullyladen.
In addition to the vehiclel oad, the driving dis-
tance possible depends upon:
Rvehicles peed
Rroad condition
Routside temperature
The driving distance possible in run-fla tmode
may be reduced by extreme driving conditions
or maneuvers, or it can be increased through a
moderate style of driving.
The driving distance possible in run-fla tmode is
counted from the moment the tire pressure loss
warning appears in the multifunction display.
You must not exceed amaximu mdesign speed
of 50 mph (80 km/h).
When replacing one or all tires, please observe
the following specifications for you rvehicle's
tires:
Rsize
Rtype and
Rthe "MOExtended "mark
If at ire has gone flat and cannot be replaced
with aMOExtended tire, astandard tire may be
use dasat emporary mea
sure. Make sure thatyou use the propers
ize and type (summer or
winter tire).
Vehicles equipped with MOExtended tires are
not equipped with aTIREFIT kit at the factory. It
is therefore recommendedt hat you additionally
equip you rvehiclew ithaTIREFIT kit if you mount
tires that do not feature run-fla tcharacteristics,
e.g. winter tires. ATIREFIT kit can be obtained
from aqualified specialist workshop, for exam-
ple.
Important safety notes
GWARNING
When driving in emergency mode, the driving
characteristics deteriorate, e.g. when corner-
ing, accelerating quickly and when braking.
There is arisk of an accident.
Do not exceed the stated maximu mspeed.
Avoid abrupt steering and driving maneuvers,
and driving over obstacles (curbs, potholes,
off-road). This appliesinp articulartoaladen
vehicle.
Stop driving in emergency mode if:
Ryou hearb anging noises.
Rthe vehicles tarts to shake.
Ryou see smoke and smell rubber.
RESP®is intervening constantly.
Rthere are tears in the sidewalls of the tire.
After driving in emergency mode, have the
wheelr ims checked at aqualified specialist
workshopw ith regard to their further use .The
defective tire must be replaced in every case.
TIREFIT kit
Important safety notes
TIREFIT is atire sealant.
You can use TIREFIT to seal puncture sofupto
0.16 in (4 mm) ,particularly those in the tire
tread. You can use TIREFIT at outside tempera-
tures downt oÒ4‡( Ò20 †).
Flat tire247
Breakdown assistance
Z

GWARNING
In the following situations, the tire sealant is
unable to provides ufficient breakdown assis-
tance, as it is unable to seal the tire properly:
Rthere are cuts or puncture sinthe tire larger
than those mentioned above.
Rthe wheelr im is damaged.
Ryou have drivenatv ery low tire pressures or
on aflat tire.
There is arisk of an accident.
Do not drive the vehicle. Contact aqualified
specialist workshop.
GWARNING
The tire sealant is harmfu land causes irrita-
tion. It must not come into contact with your
skin, eye sorclothing or be swallowed.Don ot
inhal eTIREFIT fumes .Keep tire sealant away
from children. There is arisk of injury.
If you come into contact with the tire sealant,
observe the following:
RRinse off the tire sealant from you rskin
immediatel ywith water.
RIf the tire sealant comes into contact with
you reyes, immediatel yrinse them thor-
oughly with cleanw ater.
RIf tire sealant is swallowed,i mmediately
rinse you rmouth out thoroughly and drink
plenty of water. Do not induce vomiting,
and seek medical attention immediately.
RImmediately change out of clothing which
has come into contact with tire sealant.
RIf an allergic reactio noccurs, seek medical
attention immediately.
!Do not operate the tire inflation compressor
for longer than eightm inutes atatime without
ab reak. It may otherwise overheat.
The tire inflation compressor can be operated
again once it has cooledd own.
Comply with the manufacturer’s safety instruc-
tions on the sticker on the tire inflation com-
pressor.
Using the TIREFIT kit
XDo not remove any foreigno bjects which have
penetrated the tire, e.g. screws or nails.
XRemove the tire sealant bottle, the accompa-
nying TIREFIT sticker and the tire inflation
compressor from the stowage wellu nder-
neath the trunk floor (
Ypag e245).
XAffix part :of the TIREFIT sticker to the
instrument cluster withi nthe driver's fieldo f
vision.
XAffix part ;of the TIREFIT sticker near the
valve on the wheelw ith the defective tire.
XRemove filler hoseBand plug =from the
bottom section of the tire inflation compres-
sor housing.
XSlide the yellow filler hose connector into the
mounting on yellow cap Aof tire sealant bot-
tle : until the pluge ngages.
XWith the sealing rings in front, slidey ellow cap
A of tire sealant bottle :into the mounting
of tire inflation compressor ;.
The cap must engag einboth hooks.
248Flat tire
Breakdown assistance

XRemove thecap from valv eC on th efault y
tire.
XScrew filler hos eD onto th evalve.
XInser tplug =intothe cigarette lighte rsocke t
(Ypage 223) or int oa12Vpower socke tin
your vehicl e(Ypage 223).
XTurn theSma rtKey to position 1in th eignition
loc k(Ypage 116).
XPress on and off switch ?on th etirei nflation
compressor to ON.
The tire inflation compressor is switched on .
The tire is inflated.
First ,tires ealan tispumped int othe tire. The
pressur emay briefly ris etoapproximately
50 0k Pa(5.0b ar/7 3psi).
Do not switch off th etirei nflation com -
pressor during this phase .
XLet thetirei nflation compressor run for a
maximum of te nminutes. The tire should then
hav eattained apressur eofatl east 200kPa
(2. 0b ar/29 psi) .
If at irep ressur eof200 kPa( 2.0b ar/29 psi) is
achieved after amaximum of te nminutes, see
(
Ypage 249).
If at irep ressur eof200 kPa( 2.0b ar/29 psi) is
no ta chieved after amaximum of te nminutes,
see (
Ypage 249).
If tire sealan thas escaped, clean it off affecte d
areas as quickly as possible. Use plain water if
possible.
If your clothes are soiled wit htires ealant, hav e
them cleane dwithp erchloroethylen eatadry
cleane rassoo
nasp o
ssible.
Tire pressure not reached
Ifat irep ressur eof200 kPa(2.0 bar/29 psi) has
beena chieved after ten minutes:
XSwitch off the tire inflation compressor.
XUnscrew the filler hose from the valve of the
faulty tire.
Note that tire sealant may escap ewheny ou
unscrew the filler hose.
XVery slowly drive forwards or reverse approx- imately 30 ft (10 m).
XPump up the tire again.
After amaximu moften minutes ,the tire pres-
sure must be at least 200 kPa (2.0 bar/
29 psi).
GWARNING
If the required tire pressure is not reached
after the specified time, the tire is too badly
damaged. The tire sealant cannot repair the
tire in this instance. Damaged tires and atire
pressure that is too low can significantly
impair the vehicle's braking and driving char-
acteristics. There is arisk of accident.
Do not continue driving. Contact aqualified
specialist workshop.
Tire pressure reached
GWARNING
At ire temporarily sealed with tire sealant
impairs the driving characteristics and is not
suitabl efor higher speeds. There is arisk of
accident.
You should thereforea dapt yourdriving style
accordingly and drive carefully .Donot exceed
the specified maximu mspeedw ithatire that
has beenr epaired using tire sealant.
The maximu mspeedf oratire sealed with tire
sealant is 50 mph (80 km/h). The upper part of
the TIREFIT sticker must be affixed to the instru-
ment cluster in the driver's fieldofv ision.
!Residuefrom the tire sealant may come out
of the filler hose after use .This coul dcause
stains.
Therefore, place the filler hose in the plastic
bag which contained the TIREFIT kit.
Flat tire249
Breakdowna ssistance
Z

HEnvironmentalnote
Hav ethe used tir esealantb ottle disposed of
professionally, e.g .ataqualifieds pecialist
workshop.
If tir epressure of 20 0kPa(2.0 ba r/29 psi )has
beena chieved after amaximu mperiod of ten
minutes:
XSwitch off the tire inflation compressor.
XUnscrew the filler hose from the valve of the
faulty tire.
XStow the tire sealant bottle and the tire infla- tion compressor.
XPull away immediately.
XStop after driving for approximately ten
minutes and check the tire pressure with the
tire inflation compressor.
The tire pressure must now be at least
130 kPa (1.3 bar/19 psi).
GWARNING
If the required tire pressure is not reached
after driving for ashort period, the tire is too
badly damaged. The tire sealant cannot repair
the tire in this instance. Damaged tires and a
tire pressure that is too low can significantly
impair the vehicle's braking and driving char-
acteristics. There is arisk of accident.
Do not continue driving. Contact aqualified
specialist workshop.
iIn cases such as the one mentioned above,
contact an authorized Mercedes-Benz Cen-
ter. Or call 1-800-FOR-MERCedes( in the
USA) or 1-800-387-0100 (in Canada).
XCorrect the tire pressure if it is still at least
130 kPa (1.3 bar/19 psi).S ee the Tire and
Loading Information placard on the driver's
side B-pillar or the tire pressure tabl einthe
fuel filler flapf or values.
XTo increase the tire pressure: switch on the
tire inflation compressor.
XTo reduce the tire pressure: depress pres-
sure release button :next to pressure
gauge ;.
XWhen the tire pressure is correct, unscrew the
filler hose from the valve of the sealed tire.
XScrew the valve cap onto the tire valve of the
sealed tire.
XTo remove the tire sealant bottle from the tire
inflation compressor, press together the lock-
ing tabs on the yellow cap.
XPullthe tire sealant bottle out of the tire infla-
tion compressor.
The filler hose remains attache dtothe tire
sealant bottle.
XDrive to the nearest qualified specialist work-
shop and have the tire change dthere.
XHave the tire sealant bottle and the filler hose
replaced as soon as possibleataq ualified
specialist workshop.
XHave the tire sealant bottle replaced every
four years at aqualified specialist workshop.
250Flat tire
Breakdowna ssistance

Checkwheelsand tires for damag eatleast once
am onth .Checkw heelsa nd tires after driving
off-road or on roug hroads. Damaged wheels
can caus ealoss of tir epressure. Pay particular
attentio ntodamagesucha s:
Rcutsint hetires
Rpunctures inthet ires
Rtears inthet ires
Rbulges on tires
Rdeformatio norsevere corrosiononw heels
Regularly check thetiret read dept hand the
conditio nofthetread across th ewhole widthof
th et ire(
Ypage 261). Ifnecessary, tur nthe
frontw heelstof ull lockino rder to inspectt he
inner sideof thetires urface.
All wheelsm ust haveavalvec ap to protect the
valv eagainst dirtand moisture. Do no tmount
anythingo ntot he valv eother than th estandard
valv ecap or other valv ecaps approved by
Mercedes-Ben zfor your veh icle.Don otuse any
other valv ecaps or systems ,e.g.t irep ressure
monitorin gsystems.
Regularly check thepressureofa llth et ires par-
ticularly priortol ongt rips. Adjus tthe tirep res-
sure as necessary (
Ypage 263).
Observ ethe note sont heemergenc yspare
wheel (
Ypage 285).
The servic elife of tires depends, amon gother
things, on th efollowin gfactors:
Rdriv ing style
Rtirep ressure
Rdist ancecovered
Notes on tir etread
GWAR NING
In suff icient tir etread will reduce tir etraction.
The tir eisnol ongerabletodissipat ewater.
This mean stha tonw et road surfaces ,the risk
of hydroplaning increases, inparticular where
speedisn otadapted to suit th edriving con-
dit ions. Thereisar iskofa cciden t.
If th et irep ressureist oohigh or to olow, tires
may exhibit different leve lsof wear at differ-
entl ocations on th etiret read. Thus,y ou
should regularly check th etread dept hand
th ec onditio noft hetread across th eentire
widt hofa lltires.
Minimum tir etread depthf or:
RSummer tires: âin(3 mm)
RM+S tires: ãin(4 mm)
For safety reasons, replace th etires before
th el egally prescribe dlimit for th eminimum
tir et read depthisr eached.
Marking:shows wheret hebar indicator for
tread wear (arrow) is integrate dintot he tire
tread.
Treadwear indicators (TWI)a re required by law.
Six indicators are positione donthetiret read.
They are vis ibleonce atread depthofa pprox-
imately áin (1. 6mm) has been reached. If this
is th ecase, th etireissow orn that it must be
replace d.
Selecting, mounting and replacing
tires
ROnly moun ttires and wheelsoft hesame type
and make.
Exception: itis permissible to moun tadiffer-
entt ype or mak eintheevent of aflat tire.
Observ ethe "MOExtended tires (tires with
run-flat characteristics)" section
(
Ypage 247).
ROnly moun ttires of th ecorrec tsizeo ntot he
wheels.
RBreak inne wt ires at moderat espeeds for the
first 60 mile s(10 0k m). The ne wtires only
reac htheirfull performance after this dis-
tance.
RDo no tdrivew itht ires whic hhave to olittle
tread depth. This significantly reduces the
traction on wet road s(hydroplaning).
RReplacet hetires after six years at th elatest,
regardless of wear.
Operation261
Wheels and tires
Z

MOExtended tires (tires with run-flat
characteristics)
With MOExtended tires (tires with run flat char-
acteristics), you can continue to drive you rvehi-
cle even if there is atotal loss of pressure in one
or more tires.
MOExtended tires may only be use dinconjunc-
tion with an active tire pressure loss warning
system or with an active tire pressure monitor
and on wheels specifically tested by Mercedes-
Benz.
Notes on driving with MOExtended tires with a
flat tire (
Ypage2 47).
Vehicles equipped with MOExtended tires are
not equipped with aTIREFIT kit at the factory. It
is therefore recommendedt hat you additionally
equip you rvehiclew ithaTIREFIT kit if you mount
tires that do not feature run-fla tcharacteristics,
e.g. winter tires. ATIREFIT kit can be obtained
from aqualified specialist workshop.
Winter operation
General notes
Have you rvehiclew inter-proofed at aqualified
specialist workshopatt he onset of winter.
Observe the notes in the "Changing awheel"
section (
Ypage2 80).
Driving with summer tires
At temperatures below 45 ‡(+7 †), summer
tires lose elasticity and therefore traction and
braking power. Change the tires on you rvehicle
to M+S tires .Using summe rtires at very cold
temperatures coul dcaus ecracks to form,
thereby damaging the tires permanently.
Mercedes-Benz cannot accept responsibility for
this type of damage.
GWARNING
Damaged tires can caus etire inflation pres-
sure loss. As aresult, you coul dlose control of
you rvehicle. There is arisk of accident.
Check the tires regularl yfor signs of damage
and replace any damaged tires immediately.
M+S tires
GWARNING
M+S tires with atire tread depth of less than
ã in (4 mm) are not suitable for use in winter
and do not provide sufficient traction. There is
ar isk of an accident.
M+S tires with atread depth of less than ãin
(4 mm) must be replaced immediately.
At temperatures below 45 ‡(+7 †), use winter
tires or all-season tires. Both type softire are
identified by the M+S marking.
Only winter tires bearing the isnowflake
symbol in addition to the M+S marking provide
the best possibleg rip in wintry road conditions.
Only these tires wil lallow driving safety systems
such as ABS and ESP
®to function optimally in
winter. Theset ires have beend eveloped specif-
ically for driving in snow.
Use M+S tires of the same make and tread on all
wheels to maintain safe handling characteris-
tics.
Always observe the maximu mpermissible
speeds pecified for the M+S tires you have
mounted.
When you have mounted the M+S tires:
XCheck the tire pressures (Ypag e266).
XVehicles for Canada: restart the tire pres-
sure loss warning system (Ypag e267).
XRestart the tire pressure monitor
(Ypag e267).
Information about driving with an emergency
spare wheel (
Ypag e285).
Snowc hains
GWARNING
If snow chains are installed to the front
wheels, they may drag against the vehicle
body or chassis components. This could
cause damage to the vehicle or the tires.
There is arisk of an accident.
262Wintero peration
Wheels and tires

To avoid hazardous situations:
Rnever install snow chains to the front
wheels
Ralwaysinstall snow chains in pairs to the
rear wheels.
For safety reasons, Mercedes-Benz recom-
mends that you only use snow chains that have
been specially approved for your vehicle by
Mercedes-Benz,ora re ofacorresponding
standard of quality. For more information,
please contact aqualified specialist workshop.
If you inten dtomount snow chains, please bear
the following points in mind:
RSnow chains may not be mounted on all
wheel/tire combinations. Permissible wheel-
tire combinations (
Ypage 284).
ROnly use snow chains when driving on roads
completely covered by snow. Remove the
snow chains as soon as possible when you
come to aroad that is not snow-covered.
RLocal regulations may restrict the use of snow
chains. Observe the appropriate regulations if
you wish to mount snow chains.
RDo not exceed the maximum permissible
speed of 30 mph (50 km/h).
You may wish to deactivate ESP
®when pulling
away with snow chains installed (Ypage 60).
You can thereby allow the wheels to spin in a
controlled manner ,achieving an increased driv-
ing force (cutting action).
Information about driving with an emergency
spare wheel (
Ypage 285).
Tire pressure
Tire pressur especifications
Important safety notes
GWARNING
Underinflated or overinflated tires pose the
following risks:
Rthe tires may burst, especially as the load
and vehicle speed increase.
Rthe tires may wear excessively and/or
unevenly, which may greatly impair tire
traction.
Rthe driving characteristics, as well as steer-
ing and braking, may be greatly impaired.
There is arisk of an accident.
Follow recommended tire inflation pressures
and check the pressure of all the tires includ-
ing the spare wheel:
Rmonthly, at least
Rif the load changes
Rbefore beginning along journey
Runder different operating conditions, e.g.
off-road driving
If necessary, correctt he tire pressure.
The data on the Tire and Loading Information
placard and tire pressure table shown here are
examples. Tire pressure specification sare vehi-
cle-specific and may deviate from the data
shown here. The tire pressure specifications
that are valid for your vehicle can be found on
the Tire and Loading Information placard and
tire pressure table on the vehicle.
General notes
The recommended tire pressures for the tires
mounted at the factor ycan be found on the
labels described here.
Operation with an emergency sparew heel:
information on operation with an emergency
spare wheel can be found in the general notes in
the "Emergency spare wheel" section
(
Ypage 286).
Further information on tire pressures can be
obtained at aqualified specialist workshop.
Tirep ressure263
Wheels and tires
Z

Tire and LoadingInfor matio nplacard
:Recommended tire pressures
The Tire and Loading Informatio nplacard is on
the B-pillar on the driver's side (
Ypage 271).
The Tire and Loading Informatio nplacard con-
tains the recommende dtire pressures for cold
tires. The recommende dtire pressures ar evalid
for the maximum permissibl eloa da nd up to the
maximum permissibl evehicl espeed.
Tire pressure table
The tire pressure table is on the insid eofthe fuel
fille rflap. It shows the tire pressure for al ltires
permitted at the factory for thisv ehicle; see
illustratio n(example).
The tire pressure table contains the recommen-
de dp ressures for col dtiresfor various operat-
ing conditions, i.e .differin gloa da nd spee dcon-
ditions.
If at ire size precedes atire pressure, the fol-
lowing tire pressure informatio niso nlyv alid for
thatt ire size; see illustratio n(example).
The load conditions "partiall yladen "and "fully
laden" ar edefine dint he table for different num-
bers of occupants and amounts of luggage.T he
actual numbe rofseats mayd iffer.
Some tire pressure table sshowo nlyt he rim
diameters instea dofthe full tire size, e.g. R18.
Ri md iame terisp artoft he tire size and can be
found on the tire sidewall (
Ypage 275).
If the tire pressures have been set to the lower
values for lighte rloads and/or lowe rroad
speeds ,the pressures shoul dbereset to the
highe rvalues :
Rif youwanttod rive with an increased load
and/or
Rif yo uwanttod rive at highe rroa ds peeds
The tire pressures for increased load sand/or
highe rroa ds peeds, shown in the tire pressure
table ,mayhave anegative effect on driving
comfort.
If the tire pressure is not set correctly, thisc an
lead to an excessive build-u pofheata nd asud-
de nlossofp ressure.
For mor einformation, contact aquali fied spe-
cialist workshop.
264Tire pressure
Wheel sand tires