MERCEDES-BENZ SLC ROADSTER 2019 Owner's Manual

Count
ry Ra
dio type approval number IC:
2546A-MC34 MA4 Load
ingthevehicle Inst
ruction labels fortires and loads G
WAR
NING
Ove rloade dtir es can over heat ,causi nga
blowout .Ove rloade dtir es can also impair
th est eerin gand drivingchar acteris ticsand
lead tobrak efailur e.Ther eis arisk ofacc i-
den t.
Obse rvetheload rating ofthetir es. The load
rat ing must beatleast halfoftheGAWR of
your vehicle.Nev erover load thetir es by
exc eedin gth emax imum load.
Two instruct ion labels onyour vehicle show
th emax imum possibleload.
(1) TheTire andLoadin gIn for mat ionplacar d
is on theB- pillar onthedriv er'sside. The
Tire andLoadin gIn for mat ionplacar d
shows themax imum permissiblenum ber
of occ upant sand themax imum permissi-
ble vehicle load. Italso contain sdet ails of
th etir esiz es and correspon ding pressures
for tires moun tedatthefac tory.
(2) Thevehicle iden tificat ion plat eis on the
B- pillar onthedriv er'sside. Thevehicle
iden tificat ion plat einf orm syou ofthe
gro ssveh icle weight rating .It is made up
of theveh icle weight ,all veh icle occu-
pant s,thefuel andthecar go. You canalso
fin dinf orm ationabout themax imum gross
axle weight rating onthefro ntand rear
axle.
The maximum grossaxle weight rating is
th emax imum weight that can becar ried
by one axle (front orrear axle) .Nev er
exc eed themax imum loadorthemax i-
mum grossaxle weight rating forthefro nt
or rear axle. 0043
B-pillar ,driv er'sside Ma
xim um permis sible grossvehicle
weight ratin g X
Spe cificat ion formax imum grossveh icle
weight 0043islist ed intheTire andLoadin g
In for mat ionplacar d:"The combinedweight
of occ upant sand cargoshould never
exc eed XXX kilogram sor XXX lbs."
The grossweight ofall veh icle occupant s,load
and luggage mustnotexceed thespec ified
value.
i The
spec ificatio nsshown ontheTire and
Loadin gIn for mat ionplacar din theillust ra-
tio nare exam ples.Themaximum permissi-
ble grossveh icle weight rating isveh icle-
spec ificand may differfro mthat intheillus-
tr atio n.You canfindth evalid maximum per-
miss iblegrossveh icle weight rating foryour
veh icle ontheTire andLoadin gIn for mat ion
placar d. Load
ingthevehicle
279Wheels andtires Z

Numbe
rof seats Ma
xim um num berof seats 0043indicates the
ma xim um num berof occu pants allo we dto
tra vel inthe vehicle. Thisinf orm ation can be
fou ndonthe Tire and Loading Info rma tion
pl aca rd.
i Th
esp eci ficat ions sho wnonthe Tire and
Loa ding Info rma tionplaca rdinthe illu stra -
tio nar eexa mpl es.Th enum berof seats is
veh icle-s pecificand candiffe rfro mthe
de tai lssho wn. Thenum berof seats inyour
veh iclecan befou ndonthe Tire and Load-
ing Info rma tionplaca rd. De
termi ning the correc tlo ad limit
Ste p-by -stepin struc tions Th
efol lowi ng ste pshave been devel oped as
req uired ofallma nuf acturers und erTitle 49,
Co de ofU.S. FederalRe gulatio ns, Part575
pu rsu ant tothe "Nati ona lTra fficand Motor
Ve hicle Safety Act of1966 ".
X Ste p1: Loc ate the stateme nt"The com -
bi ned weight ofoccu pants and cargosho uld
neve rexce edXXX kgorXXX lbs." onyour
veh icle’sTire and Loading Info rma tionplac-
ar d.
X Ste p2: Dete rminethe com bined weight of
the driver and passe nge rstha twi llbe ridi ng
in your veh icle.
X Ste p3: Sub tractthe com bined weight of
the driver and passe nge rsfro mXXX kilo-
gra ms orXXX lbs.
X Ste p4: Theres ulting figu re equalsthe avail-
ab leam ount ofcar goand lugg ageload
cap acity. For exampl e,ifthe "XXX" amount
eq uals1400 lbsand therewillbe five 150-l b
pa sse nge rsinyour veh icle, the amount of av
ailabl e car goand lugg ageload cap acityis
650 lbs(14 00-750 (5x150) =650 lbs).
X Ste p5: Dete rminethe com bined weight of
lu gg ageand cargobeing load ed on the vehi-
cle .Th at we ight ma ynot safel yexce edthe
av ailabl e car goand lugg ageload cap acity
cal culated inste p4. Ex
ampl e:ste ps1to 3
Th efol lowi ng tab lesho wsexa mpl eson howto
cal culate tota land cargoload cap acitieswi th
va rying seati ng conf igur ati ons and num berand
si ze ofoccu pants. Thefol lowi ng exa mpl esuse
a load limi tof 1500 lbs(68 0kg ).Thi sis for
il lus trati onpurpo seson ly.Ma kesure you
ar eus ing the actu alload limi tfor your veh icle
sta ted onyour veh icle'sTire and Loading Info r-
ma tionplaca rd(Y page 279 ).
Th egre aterthe com bined weight ofthe occu -
pa nts, thelowe rthe maxim um lugg ageload .
Ste p1 Ex
ampl e1 Ex
ampl e2 Co
mbi nedmax-
imu mwe ight
of occu pant s
and cargo
(da tafro mthe
Tire andLoad-
in gIn fo rma-
tio npla card) 1500
lbs
(68 0kg ) 1500
lbs
(68 0kg ) 28
0 Lo
adi ng the vehicleWhe elsand tires

Step
2 Example
1 Example
2 Num
berofpeo-
ple inthe vehi-
cle (driver and
occupants) 1 2
Weight
ofthe
occupants Occu-
pant 1:
175 lbs
(80 kg) Occu-
pant 1:
175 lbs
(80 kg)
Occu-
pant 2:
195 lbs
(88 kg) Gross
weight
of all occu-
pants 175
lbs
(80 kg) 370
lbs
(168 kg) Step
3 Example
1 Example
2 Permissible
load (maxi-
mum gross
vehicle weight
rat ing from
the Tire and
Loading Infor-
mat ionplac-
ard minus the
gross weight
of all occu-
pants) 1500
lbs
(680 kg)00F8
175 lbs
(80 kg)=
1325 lbs
(600 kg) 1500
lbs
(680 kg)00F8
370 lbs
(168 kg)=
1130 lbs
(512 kg) Vehicle
identification plate
Even ifyou have calculated thetotal cargo
carefully, youshould stillmake surethatthe
gross vehicle weightratingandthegross axle
weight ratingarenot exceeded. Detailscanbe
found onthe vehicle identification plateonthe
B-pillar onthe driver's sideofthe vehicle
(Y page 279).
Permissible grossvehicle weight: thegross
weight ofthe vehicle, allpassengers andthe
load must notexceed thepermissible gross
vehicle weight. Gross
AxleWeight Rating (GAWR): themaxi-
mum permissible weightthatcanbecarried by
one axle (front orrear axle).
To ensure thatyour vehicle doesnotexceed
the maximum permissible values(grossvehi-
cle weight andmaximum grossaxleweight rat-
ing), have yourloaded vehicle (including driver,
occupants andtheload) weighed onasuitable
vehicle weighbridge. All
about wheelsand tires Uniform
TireQuality GradingStand -
ard s
Overview ofTire Quality Grading
Stand ards Uniform
TireQuality Grading Standards are
U.S. governmen tspecifications. Theirpurpose
is to provide driverswithuniform reliableinfor-
mation ontire performance data.Tiremanu-
facturers havetograde tiresusing threeper-
formance factors:0043tread weargrade, 0044
tract iongrade and0087temperature grade.
These regulations donot apply toCanada.
Nevertheless, alltires soldinNorth America
are provided withthecorrespondin gqual ity
grading markings onthe sidewal lof the tire.
Quality gradescanbefound, whereapplicab le,
on the tire sidewal lbetween treadshoulder
and maximum sectionwidth.
Example:
R Tread weargrade: 200
R Tra ction grade: AA
R Temper aturegrade: A
All passenger cartires must confor mto the
statutory safetyrequirements inaddition to
these grades. All
about wheelsand tires
281Wheels andtires Z

i
The
actual values fortires arevehicle-spe-
cific andmay deviate fromthevalues inthe
illustration.
Tr eadwear The
treadwear gradeisacomparative rating
based onthe wear rateofthe tire when tested
under controlled conditionsonaspecified U.S.
governm entcourse. Forexample, atire graded
150 would wearoneandone-half timesaswell
on the governm enttest track asatire graded
100.
The relative performan ceoftires depends
upon theactual conditionsoftheir use,how-
ever, andmay depart significant lyfrom the
norm duetovariations indriving habits, ser-
vice practic esand differenc esinroad charac-
terist icsand climate.
Tr action G
WARNIN
G
The tract iongrade assigned tothis tireis
based onstraight -aheadbraking traction
test s,and does notinclude acceleration ,
corn ering, hydroplaning, orpeak traction
charact eristics.
! Avoid
wheelspin. Thiscanlead todamage
to the drive train.
The tract iongrades –from highest tolowest –
are AA, A,Band C.Those grades represent the
tire's ability tostop onwet pavement asmeas-
ured under controlled conditionsonspecified
governm enttest surfaces ofasphalt andcon-
cret e.Atire marked Cmay have poortraction
performan ce.
The safe speed onawet, snow covered oricy
road isalway slower thanondry road surfa-
ces.
You should payspecial attentiontoroad con-
ditions whentemperat uresarearound freezing
point.
Mercedes- Benzrecomm endsaminimum tread
depth of00CF in(4 mm) onallfour winter tires.
Observe thelegally required minimum tire
tread depth (Ypage 268). Winter tirescan
reduce thebraking distance onsnow-c overed
surfaces incomparison withsummer tires.The
braking distance isstill much further thanon surfaces
thatarenot icyorcovered withsnow.
Take appropriate carewhen driving.
Temp erature G
WARNIN
G
The temperat uregrade forthis tireisestab-
lished foratire that isproperly inflatedand
not overloaded. Excessive speed, underinfla-
tion, orexcessiv eloading, eitherseparately
or incombinat ion,cancause excessiv eheat
build-up andpossible tirefailure.
The temperat uregrades areA(the highest), B,
and C,represent ingthe tire's resistanc eto the
generation ofheat anditsability todissipate
heat when testedunder controlled conditions
on aspecified indoorlaboratory testwheel.
Sustained hightemperat urecan cause the
material ofthe tire todegenerate andreduce
tire life, and excessiv etemperat urecan lead to
sudden tirefailure. Thegrade Ccorrespon ds
to alevel ofperforman cewhich allpassenger
car tires must meet under theFederal Motor
Vehicle SafetyStandard No.109. Grades B
and Arepresent higherlevelsofperforman ce
on the laboratory testwheel thantheminimum
required bylaw. 282
All
about wheelsand tiresWheels andtires

Tire
labelin g
Ov erv iew 0043
UniformTire Qu ality Grad ing Stand ard
(Y page 286 )
0044 DOT, Tire Ide ntifi cationNumbe r
(Y page 285)
0087 Maxim um tire load (Ypage 285 )
0085 Maxim um tire pressu re(Y page 273 )
0083 Manuf actu rer
0084 Tire ma teri al(Y page 286 )
006B Tire size designa tion,load -be aring capacity
and spee dra ting (Ypage 283 )
006C Loadind ex(Y page 285 )
006D Tire nam e
The markin gsdescri bedab ove areon the tire
in ad ditio nto the tire nam e(sales designa tion)
and themanuf actu rer'snam e.
i Ti
re data isveh icle-s pecificand mayde vi-
ate fromthe data inthe exampl e.
Tire size des ignati on,lo ad-b earing
ca pac ityand speedratin g G
WA
RNING
Excee ding the stated tire load -be aring capa-
city and theappro ved maxim um spee d
cou ldlead totire dama georthe tire burst-
ing .The reisaris kof acc ident.
The refore ,onl yus etire typesand sizes
ap pro ved foryour veh iclemod el.Ob ser ve the
tire load rating andspee dra ting
req uired foryour veh icle. 0043
Tire width
0044 Nom inalas pe ct ratio in%
0087 Tire cod e
0085 Rim diam ete r
0083 Loadbe aring index
0084 Spe edrating
Ge neral: dependi ng on the manuf actu rer's
sta nda rds,the size imp rinted inthe tire wall
ma ynot conta inany letters orma yconta in
one letter thatpre ced esthe size descri ption.
If the reisno letter preced ingthe size descri p-
tio n(a ssho wnabove ):the searepa sse nge r
veh icletire sacc ording toEur opeanma nuf ac-
tur ing standa rds.
If "P "pre ced esthe size descri ption: theseare
pa sse nge rveh icletire sacc ording toU.S. man-
uf actu ringsta nda rds.
If "L T" pre ced esthe size descri ption: theseare
li ght truck tire sacc ording toU.S. manuf actu r-
ing standa rds.
If "T "pre ced esthe size descri ption: comp act
eme rgency wheelswith high tire pressu retha t
ar eonl yde signe dfor temp oraryusein an
eme rgency .
Tire width: tirewidth 0043sho wsthe nomi nal
tire width inmil limete rs.
He ight-w idth ratio :as pe ct ratio 0044 isthe size
ra tio betwe enthe tire height and tirewidth
and issho wninpe rcen t.The aspe ct ratio is
cal cul ate dby divid ing the tire width bythe tire
he ight.
Tire code: tire code0087 speci fiesthe tire type.
"R "rep resents radial tire s;"D" represents
di ag ona ltire s;"B" represents diag ona lra dial
tire s. Al
labo utwhee lsan dtire s
283Whe elsand tires Z

Optionally
,tires withamaximum speedofover
149 mph (240km/h )may have "ZR"in the
size description, dependingonthe manufac-
turer (e.g.245/4 0ZR 18).
Rim diameter: rimdiameter 0085isthe diame-
ter ofthe bead seat,notthediameter ofthe
rim flange. Therimdiameter isspecified in
inches (in).
Load-bearing index:load-bea ringindex 0083is
a numerical codethatspecifies themaximum
load-bea ringcapacity ofatire.
Do not overload thetires byexceeding the
specified loadlimit. Themaximum permissible
load canbefound onthe vehicle's Tireand
Loading Information placardonthe B-pillar on
the driver's side(Ypage 279).
Example:
Load-bearing index91indicates amaximum
load of1,356 lb(61 5kg) that thetires can
bear. Forfurther information onthe maximum
tire load inkilograms andlbs,see
(Y page 285).
For further information onthe load bearing
index, see"Load index" (Ypage 285).
Speed rating: speedrating0084specifies the
approved maximum speedofthe tire.
i Tire
data isvehicle-specific andmay devi-
ate from thedata inthe example.
Rega rdless ofthe speed rating, alwaysobserve
the speed limits. Drivecarefully andadap t
your driving styletothe traffic conditions. Summer
tires Index Speed
rating Q up
to100 mph (160 km/h) R up
to106 mph (170 km/h) S up
to112 mph (180 km/h) T up
to118 mph (190 km/h) H up
to130 mph (210 km/h) V up
to149 mph (240 km/h) W up
to168 mph (270 km/h) Y up
to186 mph (300 km/h) ZR...Y up
to186 mph (300 km/h) Summer
tires Index Speed
rating ZR...(..Y) over
186mph (300km/h ) ZR over
149mph (240km/h ) R
Optionally ,tires withamaximum speedof
over 149mph (240 km/h) mayhave "ZR"in
the size description, dependingonthe man-
ufacturer (e.g.245/4 0ZR18 ).
The service specification ismade upofload-
bearing index0083and speed rating0084.
R Ifthe size description ofyour tireincludes
"ZR "and there arenoservice specifications,
ask thetire manufacturer inorder tofind
out themaximum speed.
If aservice specification isavail able, the
maximum speedislimited according tothe
speed ratinginthe service specification.
Example: 245/40ZR18 97Y.Inthis exam-
ple, "97Y"isthe service specifica tion.The
letter "Y"represents thespeed rating. The
maximum speedofthe tire islimi ted to
186 mph (300 km/h).
R The size descriptio nfor alltires withmaxi-
mum speed sof over 186mph (300 km/h)
must include "ZR",and theservice specifi-
cation mustbegiven inparentheses .Exam-
ple: 275/40 ZR18 (99 Y).Speed rating"(Y)"
indicates thatthemaximum speedofthe
tire isover 186mph (300 km/h). Askthe
tire manufacture rabou tthe maximum
speed . All
-
weather
tires
and win-
ter tires Index Speed
rating Q
M+S 1 up
to100 mph (160 km/h) T
M+S 1 up
to118 mph (190 km/h) H
M+S 1 up
to130 mph (210 km/h) V
M+S 1 up
to149 mph (240 km/h) 1
Or M+S 004D forwinter tires. 284
Al
labout wheelsand tiresWheel sand tires

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 292).
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 lof the tire. Youwillfind thisafter thelet-
ter that identifies thespeed rating
(Y page 283).
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 loadtire
R C, D, E:represents aload range that
depends onthe maximum loadthatthetire
can carry atacertain 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 279).
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
TINisauniqu eidentification number.The
TIN enable sthe tire manufacturers orretread-
ers toinform purchase rsof recalls andother
safety-rele vantmatters. Itmakes itpossib le
for the purchase rto easi lyidentify theaffected
tires. All
about wheelsand tires
285Wheelsand tires Z

The
TINismade upofmanufact ureridentific a-
tion code 0044,tire size 0087,tire type code 0085
and manufact uringdate0083.
DOT (Departm entofTra nsport ation): tire
symbol 0043marks thatthetire complies with
the requirement sof the 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 292).
Tire size: identifier 0087describes thetire size.
Tire typecode: tiretype code 0085can beused
by the manufact urerasacode 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 of1bar.
DOT (Departm entofTransport ation)
DOT- marked tiresfulfill therequirement sof
the USDepartm entofTransport ation.
Norm aloccupant weight
The number ofoccupant sfor which thevehicle
is designed multiplied by68 kilograms
(150 lbs).
Uniform TireQuality Grading Stand ards
A uniform 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 . 286
All
about wheelsand tiresWheels andtires

Rim
Thi sis the partof the whe elon whi chthe tire
is mou nted.
GAW R(Gro ssAxleWei ght Ratin g)
The GAW Ris the maxi mum grossaxl ewe igh t
rati ng. The actu alloa don anaxlemus tneve r
excee dthe gros saxl ewe igh trati ng. The gros s
axl ewe igh trati ngcan befou ndonthe vehi cle
id entif ication plate onthe B-pi llar on the driv-
er's side.
Spe edrating
The speedrati ngispa rtof the tire identif ica-
tion. Itspe cifiesthe speedrang efor whi chthe
tire isap pro ved .
GVW (GrossVehi cle Wei ght)
The gros svehi cleweigh tincl udes the weigh t
of the vehi cleincluding fuel,tool s,the spare
whe el,acce ssoriesinsta lled, occu pants, lug-
ga ge and thedrawbarnose weigh t,ifap plica -
bl e. The gros svehi cleweigh tmus tnot excee d
the gros svehi cleweigh trati ngGVW Ras spe ci-
fie don the vehi cleidentif ication plate onthe
B-pi llar on the driver' ssid e.
GVWR (GrossVehi cle Wei ght Ratin g)
The GVW Ris the maxi mum permis siblegros s
we igh tof aful lyloa ded vehicle(the weigh tof
the vehi cleincluding allacce ssories,occu -
pa nts, fuel,lu gga geand thedrawbarnose -
we igh t,ifap plica ble). The gros svehi cleweigh t
rati ngisspe cified on the vehi cleidentif ication
pl ate onthe B-pi llar on the driver' ssid e.
Maxi mum loaded vehicle we ight
The maxi mum weigh tis the sum of:
R the curb weigh tof the vehi cle
R the weigh tof the acce ssories
R the loadlimit
R the weigh tof the facto ryinsta lled opti onal
equ ipment
Ki lopasc al(kP a)
Metri cuni tfor tire pressu re.6.9 kPa corre -
spo nds to1psi .Another unitfor tire pressu re
is ba r.100 kilopa scals(kPa )are the equivalent
of 1ba r. Lo
ad index
In addition tothe load-be aring index, the load
ind exmay also be imp rinte don the sidewallof
the tire.Thi sspe cifiesthe load-be aring cap a-
city more precise ly.
Curb weight
The weigh tof avehi clewith stand ardequip-
ment including the maxi mum capacityof fue l,
oil and coolant. Italso incl udes the air-condi -
tioni ngsystem andoptionalequ ipment ifthes e
are insta lled inthe vehi cle,bu tdoe snot
incl udepa sse ngers orlugga ge.
Maxi mum load rating
The maxi mum loadrati ngisthe maxi mum per-
mis siblewe igh tin kilogra msorlbsfor whi cha
tire isap pro ved .
Maxi mum permis sibl etire press ure
Ma ximu mper mis sibletire pressu refor one
tire .
Maxi mum load on onetire
Ma ximu mloa don one tire.Thi sis cal cul ate d
by divid ing the maxi mum axleloa dof one axle
by two.
PSI (pounds persquare inch)
A stand ardunitof mea sure for tire pressu re.
As pec tratio
Re lations hipbetw eentireheight and tirewidth
in per cent.
Tire press ure
Thi sis pre ssu reinsi dethe tire applying anout-
wa rdforce toeach squ are inch ofthe tire's
su rfa ce. The tirepressu reisspe cified in
pou nds persquare inch (psi) ,in kilopa scal
(kPa )or inba r.The tirepressu resho uld only
be corre ctedwhenthe tiresare cold .
Co ldtire press ure
The tiresare cold :
R ifthe vehi clehasbee npa rked with the tires
ou tof direct sunli ght foratleas tthree hours
and
R ifthe vehi clehasnot beendri ven further
than 1mil e(1.6 km) Al
labo utwh eelsand tires
287Wheelsand tires Z

Tread
The partof the tire thatcome sinto conta ct
wi th the road.
Bead The tirebead ensu resthatthe tire sits
sec urelyon the wheel.The rearesev eralstee l
wi res inthe bead topre vent thetire from com-
ing loose from thewheelrim .
Si dew all
The partof the tire betwe enthe trea dand the
be ad.
Wei ght ofopti onalextras
The comb inedwe ight ofthos eop tio nal extra s
tha twe igh mor etha nthe replaced standa rd
pa rts and moretha n2.3 kg(5lbs).The se
op tio nal extra s,su ch ashigh-p erform ance
bra kes, level contro l,a roo fra ck orahigh-p er-
form ance battery ,ar enot included inthe curb
we ight and theweight ofthe acce ssories.
TIN (Tire Ide ntificatio nNumbe r)
Thi sis auni queidenti fierwh ich can beused
by atire manuf actu rertoidenti fytire s,for
exa mpl efor apro duct reca ll, and thusid enti fy
the purcha sers.The TINisma de up ofthe
ma nuf actu rer'sidenti tycod e,tire size, tire
typ ecod eand themanuf actu ring date.
Lo ad bearin gin dex
The load bearing index(also load index) isa
cod etha tconta insthe maximu mload bearing
cap acityof atire .
Tracti on
Tra ctio nis the resultof frictio nbe twe enthe
tire sand theroadsu rfa ce.
Treadw earindic ators
Na rro wba rs (tre adwearbars) thatar edistri b-
ute dove rthe tire trea d.Ifthe tire trea dis level
wi th the bars, the wearlimit of00CD in(1.6 mm)
ha sbe en rea che d.
Oc cupant distrib utio n
The distri butio nof occu pants inaveh icleat
thei rde signa ted seating positio ns.
Total load limit
Nom inallo ad and lugga geload plus 68 kg
(15 0lbs) mu ltiplied by the num berof sea tsin
the vehicle. Ch
ang ingawh eel Fl
at tire
The "Breakdo wnassista nce" section
(Y page 252 )conta insinfo rma tionand note s
on how todealwith afla ttire .Info rma tionon
dri ving with MOExte ndedtire sin the eventofa
fla ttire can befou ndund er"M OExtend edtire s
(ti res with run-fla tcha racteri stics"
(Y page 253 ). Rotati
ngthe wheels G
WA
RNING
Ro tati ngthe fron tand rearwh eelsifthe
wh eelsor tire sha ve diffe rent dimens ions
ma ysev erelyimp airthe driving characteri s-
tics .The servicebra keorwh eelsu spe nsion
comp onents mayal so be dama ged. The reis
a ris kof an acci dent.
Ro tate frontand rearwh eelsonl yif the
wh eelsand tiresar eof the same dimen-
si ons.
! On
veh icles equipp ed with atire pressu re
moni tor,electro niccomp onents arelocate d
in the wheel.
Ti re-m ounting toolssho uld not beused nea r
the valve .Thi scou ldda ma gethe electro nic
comp onents.
Onl yha ve tire scha nge dat aqu alifi ed spe -
cia list wo rksh op.
Alw ayspa yatte ntionto the instructio nsand
sa fety note swh en cha nging awh eel
(Y page 289 ).
The wearpatterns onthe fron tand reartire s
di ffe r,de pendi ng on the opera ting cond itions.
Ro tate thewheelsbe fore acle arwe arpattern
ha sform edon the tires.Front tirestyp ically
we armor eon the shoulde rand reartire sin
the cente r.
On veh icles tha tha ve the same size front and
rea rwh eels,yo ucan rotatethe wheelsacco rd-
ing tothe intervalsin the tire manuf actu rer's
wa rranty book inyour veh icledo cum ents. Ifno
wa rranty book isavaila bl e, the tiressho uld be
rota tedevery3,0 00 to6,0 00 miles(5,000 to
10, 000 km).Dep endingontire wear,thi sma y
be req uired earlier. Do not change thedirec-
tio nof wh eelrota tion. 28
8 Ch
ang ingawh eelWhe elsand tires