2020 MERCEDES-BENZ SLC ROADSTER tire pressure

is
shown inthe Serv . Serv
.men uofthe multif unc-
tion display. Ex
ample: currenttirep ress uredisplay
For informat iononthe mess agedisplay, refer
to the "Check ingthe tirep ress ureelect roni-
cally" section(Ypage 277).
Imp ortant safet ynotes G
WARN
ING
Eac htire, inc luding thespare (ifprov ided),
should bechec kedatleast onceam onth
when coldandinflated tothe press urerec-
omme ndedbythe vehic lemanuf acturer on
the Tire andLoadin gInformat ionplacard on
the drive r'sdoor B-pillar orthe tirep ress ure
label onthe inside ofthe fuel filler flap.If
your vehic lehas tires ofad iffe ren tsize than
the size indic ated onthe Tire andLoadin g
Inf ormat ionplacard orthe tirep ress ure
label, youshould determin ethe proper tire
press ureforthosetires.
As anadded safetyfeat ure, your vehic lehas
been equipped withatirep ress uremon itor-
ing syst em(TPMS )that illuminat esalow tire
press uretelltalewhen oneormore ofyour
tir es are sign ifican tlyunder inflated. Accor d-
ingly, when thelow tirep ress uretelltaleillu-
min ates, youshould stopand chec kyour
tir es assoon aspossible ,and inflate themt o
the proper pressure.Drivin gonas ignifi-
can tlyunder inflated tirec auses thetiret o
over heat andcanlead totiref ailure. Under-
inf lation alsoreduc esfuel effic iencyand tire
tr ead life,and may affec tthe vehic le'shan-
dling andstopping ability.
Please notethat the TPMS isnot asubst i-
tut efor proper tirem aint enan ce,and itis
the drive r'srespo nsibilit ytom aintaincor-
rec ttirep ress ure, even ifunder inflation has not
reach edthe level totrigger illuminat ion
of the TPMS lowtirep ress uretelltale.
Your vehic lehas also been equipped witha
TPMS malfun ction indic atortoindic ateifthe
syst emisnot operat ingproper ly.The TPMS
malfun ction indic atoriscom bined withthe
low tirep ress uretelltale. When thesyst em
dete ctsam alfunction, thewarnin glamp will
flash forapprox imatelyam inute and then
remain continuously illuminat ed.This
sequen cewill berepeat edever ytimet he
vehic leisstar ted aslong asthe malfun ction
exis ts.
When themalfun ction indic atorisillumina-
ted, thesyst emmay notbeable todete ctor
sign allow tirep ress ureasintended .TPMS
malfun ctions may occurfor avariet yofrea-
son s,inc luding theinstallation ofinc ompat i-
ble replac ementoralter natetires orwheels
on the vehic lethat preventtheTPMS from
func tioningproper ly.Always checkthe
TPMS malfun ction tellt aleafterreplac ing
one ormore tires orwheels onyour vehic le
to ens ure that thereplac ementoralter nate
tir es and wheels allowtheTPMS tocon tinue
to func tion proper ly.
It is the drive r'srespo nsibilitytoset the tire
press uretothat recomme ndedforcold tires
which issuitable forthe operat ingsituat ion
(Y page 271).Notet hat the correcttirep res-
sure forthe curr entoperat ingsituat ionmust
firs tbetaught -intothe tirep ress uremon itor.
If as ubst antialloss ofpress ureoccurs, the
warnin gthreshold forthe warnin gmessage is
aligned tothe taught -inrefe rencevalues.
Restar tthe tirep ress uremon itorafteradjust -
ing the press ureofthe cold tires
(Y page 278). Thecurrentpress uresare
saved asnew referencevalues. Asaresult ,a
warnin gmessage willappear ifthe tirep res-
sure drops significant ly.
The tirep ress uremon itordoes notwarn youof
an incorre ctly set tirep ress ure. Obser vethe
not eson the recomme ndedtirep ress ure
(Y page 271).
The tirep ress uremon itorisnot able towarn
you ofas udden lossofpress ure,e.g.ifthe
tir ei sp enet ratedbyaf oreign object.Int he
even tofas udden lossofpress ure,bringthe 276
Tir
ep ressur eWheels andtires

vehicl
etoah altb yb raking carefully.A void
abru ptsteering movements.
The tirepressu remonitor hasayellow warni ng
lamp inthe instrument clusterforindica ting
pressu reloss oram alfunction. Whether the
warni nglamp flashes orlights upindica tes
whethe ratirepressu reistoo low orthe tire
pressu remonitor ismalfu nctioning:
R ifthe warni nglamp islit continuous ly,the
tire pressu reon one ormore tiresissignifi -
cantly toolow.The tire pressu remonitor is
not malfu nctioning.
R ifthe warni nglamp flashes forapp rox-
imatel yaminute andthen remai nslitcon-
stantly, thetire pressu remonitor ismalfu nc-
tioning.
In add ition tothe warni nglamp ,am essage
app ears inthe multi function display.O bserve
the information ondisp laymessa ges
(Y pag e202) .
It may take uptoten minutes foram alfunc-
tion ofthe tire pressu remonitor tobe indica -
ted. Amalfunction willbeindica tedbythe tire
pressu rewarni nglamp flashing forapp rox-
imatel yone minute andthen remai ninglit.
When themalfu nction hasbeen rectified ,the
tire pressu rewarni nglamp goesoutafter a
few minutes ofdrivi ng.
The tirepressu revalu esindica tedbythe on-
boa rdcomputer maydiffer fromthose meas-
ured atag asstation withapressu regage .The
tire pressu resshow nbythe on-board com-
puter refertothose measu redatsea level .At
high altitudes, thetire pressu revalu esindica -
ted byap ressu regage arehighe rthan those
show nbythe on-board computer. Inthis case,
do not redu cethe tire pressu res.
The opera tionofthe tire pressu remonitor can
be affected byinterference fromradiotrans-
mitting equipme nt(e.g. radiohead phones,
two-wa yradi os) that may bebeing operatedin
or near thevehicl e.
Chec kingthetire pressure electroni -
call y X
Make surethattheSmartKey isin posi tion
0048 (Ypag e118) inthe ignitio nlock.
X Press the0059 or0065 button onthe steer-
ing whee ltos ele ctthe Serv. Serv.
menu. X
Press the0063 or0064 button tosele ct
Tire Pressure Tire
Pressure .
X Press 0076.
The current tirepressu reofeach tireis
show nint he multi function display.
If the vehicl ehasbeen parked forover
20 minutes ,the Tire pressure willbe Tire
pressure willbe
displaye dafter driving afew minutes displaye
dafter driving afew minutes
messa geapp ears.
After ateach-in process, thetire pressu re
monitor automatical lydetects newwhee lsor
new sensors. Aslong asac learallocation of
the tire pressu revalu etot he indivi dualwhee ls
is not possi ble,theTire Pressure Monitor Tire
Pressure Monitor
Active Active
displaymessa geisshow ninstead of
the tire pressu redisp lay.The tire pressu res
are already being monitored.
If an emerge ncyspare wheelism ounted, the
system maycontinue toshow thetire pressu re
of the whee lthat has been removed forafew
minutes. Beawa rethat thevalu edisplayed for
the posi tion where theemerge ncyspare wheel
is fitted isnot thesame asthe current tire
pressu reofthe emerge ncyspare wheel.
Tire pressure monitorwarnin gmes-
sage s The
tirepressu remonitor detectsapressu re
loss inone ormore tires:
R Ifthe tire pressu remonitor detectsapres-
sure lossinone ormore tires,awarni ng
messa geisshow nint he multi function dis-
pla y.The yellow tirepressu rewarni nglamp
then lights up.
R Ifthe Please Correct TirePressure Please
Correct TirePressure
messa geapp ears inthe multi function dis-
pla y,the tire pressu reinat lea stone tireis
too low.The tire pressu remust becorrected
when theoppo rtunity arises.
R Ifthe Check Tires Check
Tiresmessageapp ears inthe
multi function display,the tire pressu reinat
lea stone tirehas dropp edsignifi cantly. The
tires must bechecked.
R Ifthe Warning TireMalfunct ion Warning
TireMalfunct ionmes-
sage appears inthe multi function display,
the tire pressu reinat lea stone tirehas
dropp edsudd enly.The tires must be
checked.
Observe theinstructions andsafety notesin
the disp laymessa gesinthe "Tires" section
(Y pag e202). Tire
pressure
277Wheelsand tires Z

If
the wheel positio nson the vehicle arerota-
ted, thetire pressu resmay bedispl ayedfor
the wrong positionsfor ashort time. Thisis
rectified afterafew minutes ofdriving, andthe
tire pressu resare displ ayedfor the correct
positio ns.
Restarting thetire pressure monitor When
yourestart thetire pressu remonitor, all
existing warning messagesare dele tedand the
warning lampsgoo ut. The monitor usesthe
currently settire pressu resasthe reference
valu esfor monitoring. Inmost cases, thetire
pressu remonitor willautoma tically detect the
new reference valuesafter youhave changed
the tire pressu re.However, youcan also set
reference valuesmanua llyas describe dhere.
The tirepressu remonitor thenmonitors the
new tirepressu revalu es.
X Set thetire pressu reto the valu erecom-
mended forthe corresponding drivingsitua-
tion onthe Tire andLoadi ngInformation
pla card onthe driver's sideB-pilla r
(Y page 271).
Additional tirepressu revalu esfor different
load scan also befound onthe tire pressu re
table onthe inside ofthe fuel fillerflap
(Y page 271).
X Make surethatthetire pressu reiscorrect
on allfour wheel s.
X Ensure thattheSmartKey isin positio n0048
in the ignition lock.
X Press the0059 or0065 button onthe steer-
ing wheel toselect theServ. Serv.
menu.
X Press the0063 or0064 button toselect
Tire Pressure Tire
Pressure.
X Press 0076.
The multifu nctiondisplayshows thecurrent
tire pressu refor the individ ualtires orthe
Tire pressure willbedisplayed Tire
pressure willbedisplayed
after driving afew minutes after
driving afew minutes message.
X Press the0064 button.
The Use Current Pressures asNew Use
Current Pressures asNew
Reference Values Reference
Valuesmessage appearsinthe
multifu nctiondisplay.
If you wishtoc onfirm therestart:
X Press 0076.
The Tire Press. Monitor Restarted Tire
Press. Monitor Restarted
message appearsinthe multifu nctiondis-
pla y. After
driving forafew minutes, thesystem
checks whether thecurrent tirepressu res
are within thespecifie drange. Thenew tire
pressu resare then accepted asreference
valu esand monitored.
If you wishtoc anc elthe restart:
X Press 0038.
The tirepressu revalu esstored atthe last
restart willcontinue tobe monitored. 278
Tire
pressureWheel sand tires

Count
ry Ra
dio type approval number IC:
2546A-MC34 MA4 Load
ingthev ehicle Inst
ruction labels fortires and loads G
WAR
NING
Ove rloade dtires can over heat ,causi nga
blowout .Overloade dtires can also impair
th es teerin gand driv ingchar acteris ticsa nd
lead tobrak efailur e.Ther eisar iskofacc i-
den t.
Obse rvethel oad rating ofthet ires. The load
rat ing must beatleast halfoftheG AWR of
your vehicle.Never over load thet ires by
exc eedin gthe max imum load.
Two instruct ion labels onyour vehicle show
th em aximum possibleload.
(1) TheTire andLoadin gInfor mat ionplacar d
is on theB -pillar onthed river' ss ide. The
Tire andLoadin gInfor mat ionplacar d
shows them aximum permissiblenum ber
of occ upant sand them aximum permissi-
ble vehicle load. Italso contain sdetails of
th et ires izes and correspon ding pressures
for tires moun tedatthef actory.
(2) Thevehicle iden tificat ion plat eiso nthe
B- pillar onthed river' ss ide. Thevehicle
iden tificat ion plat einform syou ofthe
gro ssveh icle weight rating .Iti sm ade up
of thev ehicle weight ,allveh icle occu-
pant s,thef uel and thec argo. You canalso
fin dinform ationabout them aximum gross
axle weight rating onthef ront and rear
axle.
The maximum grossaxle weight rating is
th em aximum weight that can becar ried
by one axle (front orrear axle) .Never
exc eed them aximum loadorthem axi-
mum grossaxle weight rating forthef ront
or rear axle. 0043
B-pillar ,driver' ss ide Ma
xim um permis sible grossvehicle
weight ratin g X
Spe cificat ion formax imum grossveh icle
weight 0043islist ed intheT ire and Loadin g
In for mat ionplacar d:"The combinedweight
of occ upant sand car goshould never
exc eed XXX kilogram sorXXX lbs. "
The grossweight ofall veh icle occupant s,load
and luggage mustnotexceed thes pec ified
value.
i The
spec ificatio nsshown ontheT ire and
Loadin gInfor mat ionplacar dint he illust ra-
tio na reexam ples.Themaximum permissi-
ble grossveh icle weight rating isveh icle-
spec ificand may differfro mt hatint he illus-
tr atio n.You canfindt he valid maximum per-
miss iblegrossveh icle weight rating foryour
veh icle ontheT ire and Loadin gInfor mat ion
placar d. 280
Load
ingthev ehicleWh eels andtires

i
Not
alltires withtheM+S marking provide
the driving characteristics ofwinter tires.In
addi tion tothe M+S marking, wintertires
also have the004D snowflake symbolonthe
tire wall.Tires withthismarking fulfillthe
requi rements ofthe Rub ber Manufa cturers
Association (RMA)andtheRub ber Associa-
tion ofCana da(RAC) regardi ngthe tire trac-
tion onsnow. Theyhave been especia lly
develo pedfordriving onsnow.
An electronic speedlimiter prevents yourvehi-
cle from exceeding aspeed of130 mph
(210 km/h).
The speed ratingoftires mounted atthe fac-
tory may behigher thanthemaximum speed
that theelectronic speedlimiter permits.
Make surethatyourtires have therequi red
speed rating, e.g.when buying new tires. The
requi redspeed ratingforyou rvehicle canbe
found inthe "tires" section (Ypage 293).
Further information aboutreadi ngtire data
can beobtained fromanyqualifiedspecia list
workshop.
Load index In
addi tion tothe load -bearing index,load
index 0043may alsobeimprinted onthe side-
wal lofthe tire. Youwillfind this after thelet-
ter that identifies thespeed rating
(Y page 284).
R Ifno specifica tionisgiven: notext (asinthe
example above),represents astandard load
(SL) tire
R XL orExt raLoad: represents areinforced
tire
R Light Load: represents alight load tire
R C, D, E:represents aload range that
depends onthe maximum loadthatthetire
can carry atac ertain pressure i
Tire
data isvehicle-spe cificandmay devi-
ate from thedata inthe example .
Maximum loadrating Maximum
tireload 0043isthe maximum permis-
sible weightfor which thetire isapprove d.
Do not overloa dthe tires byexceeding the
specifie dload limit. Themaximum permissible
load canbefound onthe vehicle's Tireand
Loadi ngInformation placardon the B-pilla ron
the driver's side(Ypage 280).
i The
actual valuesfor tires arevehicle-spe -
cific andmay devia tefrom thevalu esinthe
illu stration.
DOT, TireIdentifi cationNumber (TIN) US
tire regul ations stipulatethat every tire
manufacturer orretreader mustimprint aTIN
in or on the sidew allofeach tireproduced . The
TINisau niqu eidentification number.The
TIN enable sthe tire manufacturers orretread-
ers toinform purchase rsof recalls andother
safety-rele vantmatters. Itmakes itpossib le
for the purchase rtoe asilyidentify theaffected
tires. 286
All
about wheelsand tiresWheel sand tires

The
TINismade upofmanufact ureridentific a-
tion code 0044,tiresize 0087,t iretype code 0085
and manufact uringdate0083.
DOT (Departm entofTra nsport ation): tire
symbol 0043marks thatthetire complies with
the requirement softhe U.S. Departm entof
Transport ation.
Manufa ctureridentification code:manufac-
turer identific ationcode0044provides detailson
the tire manufact urer.Newtireshave acode
with twosymbols. Retreaded tireshave acode
with foursymbols.
For further informationabout retreaded tires,
see (Ypage 293).
Tire size: identifier 0087describes thetire size.
Tire typecode: tiretype code 0085can beused
by the manufact urerasac ode todescribe
specific characteristics ofthe tire.
Date ofmanu factur e:date ofmanufact ure
0083 provides informationabout theage ofa
tire. Thefirst andsecond positions represent
the week ofmanufact ure,start ingwith "01"
for the first calendar week.Positions threeand
four represent theyear ofmanufact ure.For
example, atire that ismarked "3214"was
manufact uredinweek 32in2014 .
i Tire
data isvehicle-spec ificand may devi-
ate from thedata inthe example.
Tire chara cteristics This
inform ationdescribes thetype oftire cord
and thenumber oflayers insidewall 0043and
under tiretread 0044.
i Tire
data isvehicle-spec ificand may devi-
ate from thedata inthe example. Definition
ofterm sfor tires andload-
ing Tire
plycomposition andmaterial used
Descr ibesthenumber ofplies orthe number
of layers ofrubber-coat edfabric inthe tire
tread andsidewall .These aremade ofsteel,
nylon, polyester andother materials.
Bar
Metric unitfortire pressure. 14.5038pounds
per square inch(psi) and100 kilopascals (kPa)
are the equivalent of1b ar.
DOT (Departm entofTransport ation)
DOT- marked tiresfulfill therequirement sof
the USD epartm entofTransport ation.
Norm aloccupant weight
The number ofoccupant sfor which thevehicle
is designed multiplied by68 kilograms
(150 lbs).
Uniform TireQuality Grading Stand ards
Au niform standard tograde thequality oftires
with regards totread quality, tiretract ionand
temperat urecharact eristics. Thequality grad-
ing assessment ismade bythe manufact urer
following specification sfrom theU.S. govern-
ment .The ratings aremolded intothesidewall
of the tire.
Recommended tirepressur es
The recomm endedtirepressure appliestothe
tires mounted atthe factor y.
The Tire andLoading Information placard con-
tains therecomm endedtirepressures forcold
tires onafully loaded vehicle andforthe maxi-
mum permissible vehiclespeed.
The tirepressure tablecontains therecom-
mended pressures forcold tires forvarious
operating conditions,i.e.differing loadand
speed conditions.
Increased vehicleweightduetooptional
equipm ent
The combined weightofall standard and
optional equipment availablefor the vehicle,
regardless ofwhether itis actually installed on
the vehicle ornot . All
about wheelsand tires
287Wheels andtires Z

!
To
prevent damage tothe paintwork, hold
the wheel securely againstthe wheel hub
while screwing inthe first wheel bolt. X
Clea nthe wheel andwheel hubcont actsur-
faces.
X Slide thewheel tobe mounted ontothe
alignment boltandpush iton.
X Tighten thewheel boltsuntiltheyarefinger-
tight.
X Unscrew thealignment bolt.
X Tighten thelast wheel boltuntil itis finger-
tight.
X Vehicles
withacollapsible sparewheel:
inflate thecollapsi blespare wheel
(Y page 296).
Only thenlower thevehicle.
Low ering thevehicl e G
WARNING
The wheels couldcome looseifthe wheel
bolts orwheel nutsarenot tightened tothe
prescribed tighteningtorque.Thereisar isk
of an accident.
Ensure thatthewheel boltsorwheel nuts
are tightened tothe prescribed tightening
torque.
If you arenot sure, donot move thevehicle.
Contact aqualified speciali stworkshop and
have thetightening torquechecked immedi-
ately.
! Vehicles
withacollapsible spare
wheel :before lowering thevehicle, inflate
the collapsi blespare wheel withthetire
inflation compressor. Thewheel rimcould
otherwise bedamage d. X
Turn thecrank ofthe jack counter-c lockwise
until thevehicle isonce againstanding
firmly onthe ground.
X Place thejack toone side. X
Tighten thewheel boltsevenly inac ross-
wise pattern inthe sequence indicated(0043
to 0083). Thespecified tightening torqueis
96 lb-ft (130 Nm).
X Turn thejack back toits initial position.
X Stow thejack andtherest ofthe vehicle
tools inthe trunk again.
X Vehicles withAMG equipment: insertthe
cover intotheouter sill.
X Check thetire pressure ofthe newly moun-
ted wheel andadjust itifnecessary.
Observe therecommended tirepressure
(Y page 271).
When youaredriving withthecollapsi ble
spare wheel mounted, thetire pressure loss
warning systemorthe tire pressure monitor
cannot function reliably.Only restart thetire
pressure losswarning systemortire pressure
monitor whenthedefective wheelhasbeen
replaced withanew wheel.
Vehicles withatire pressure controlsys-
tem: allinstalled wheelsmustbeequip ped
with functionin gsensors. Wheel
andtirecombination s
You canaskforinformation regardingpermit-
ted wheel/tire combinations atan authorized
Mercedes-Benz Center.
! For
safety reasons, Mercedes-Benz recom-
mends thatyouonly usetires andwheels
which havebeen approved byMercedes-
Benz specificall yfor your vehicle. Wheel
andtirecombin ations
293Wheels andtires Z

These
tireshave been specially adaptedfor
use with thecont rolsystems, suchasABS
or ESP ®
,a nd are marked asfollows:
R MO =Mercedes- BenzOriginal
R MOE =Mercedes- BenzOriginal Extended
(tires featuring run-flatcharact eristics)
R MO1 =Mercedes- BenzOriginal (onlycer-
tain AMG tires)
Mercedes- BenzOriginal Extended tiresmay
only beused onwheels thathave been spe-
cifically approved byMercedes- Benz.
Only usetires, wheels oraccessories tested
and approved byMercedes- Benz.Certain
charact eristics, e.g.handling, vehiclenoise
emissions orfuel consumpt ion,may other-
wise beadversely affected.Inaddition,
when driving withaload, tiredimension var-
iations couldcause thetires tocome into
cont actwith thebodywork andaxle compo-
nent s.This could result indamage tothe
tires orthe vehicle.
Mercedes- Benzaccepts noliabil ityfor dam-
age resulting fromtheuse oftires, wheels
or accessories otherthanthose testedand
approved.
Infor mation ontires, wheels andapproved
combinat ionscanbeobtained fromany
qualified specialist workshop.
! Retreaded
tiresareneither testednor rec-
ommended byMercedes- Benz,since previ-
ous damage cannotalway sbed etect edon
retreaded tires.Asaresult, Mercedes- Benz
cann otguarantee vehiclesafetyifretreaded
tires aremounted. Donot mount usedtires
if you have noinform ationabout theirprevi-
ous usage.
The recomm endedpressures forvarious oper-
ating condit ionscanbefound:
R on the Tire andLoading Information placard
on the B-pillar onthe driver's side
R in the tire pressure tableonthe fuel filler
flap
Observe thenoteson recomm endedtirepres-
sures under various operating conditions
(Y page 271).
Check tirepressures regularly,andonly when
the tires arecold. Comply withthemainte-
nanc erecomm endations ofthe tire manufac-
turer inthe vehicle document wallet. Notes
onthe vehicle equipment –alway s
equip thevehicle:
R with tires ofthe same sizeonagiven axle
(left andright)
R with thesame typeoftires atag iven time
(summer tires,winter tires,MOEx tended
tires)
Exc eption: itis permissible tomount adif-
ferent typeormake inthe event ofaflat
tire. Observe the"MOExt endedtires(tires
with run-flatcharact eristics)" section
(Y page 254).
Vehicles equipped withMOEx tended tiresare
not equipped withaTIREFIT kitatthe factor y.
It is therefor erecomm endedthatyouaddition-
ally equip yourvehicle withaTIREFIT kitifyou
mount tiresthatdonot feature run-flatcharac-
terist ics,e.g. winter tires.ATIREFIT kitmay be
obtained fromaqualified specialist workshop. Emergency
sparewheel Import
antsafety notes G
WARNIN
G
The wheel ortire size aswell asthe tire type
of the spare wheel oremergenc yspare
wheel andthewheel tobe replaced maydif-
fer. Mountin gane mergenc yspare wheel
may severely impairthedriving charact eris-
tics. There isar isk ofan accident .
To avoid hazardous situations:
R adapt yourdriving styleaccording lyand
drive carefully.
R never mount morethanonespare wheel
or emergenc yspare wheel thatdiffers in
size.
R only useaspare wheel oremergenc y
spare wheel ofad ifferent sizebriefly.
R do not switch ESP®
off.
R have aspare wheel oremergenc yspare
wheel ofad ifferent sizereplaced atthe
nearest qualified specialist workshop.
Observe thatthewheel andtiredimen-
sions aswell asthe tire type must becor-
rect . 294
Emergency
sparewheelWheels andtires