2019 MERCEDES-BENZ SLC ROADSTER winter tires

Overview
ofthe engine compart-
ment ....................................................2 44
ASSYST PLUS......................................244
Ca re....... .............. ................................245 Breakdow
nassi stanc e....... .............. 251
Where willIfind...? ..............................251
Flat tire....... ......................................... 252
Battery (vehicle)....... ........................... 257
Ju mp-starti ng....... ................................260
Tow ingand tow-starti ng....... ...............263
Fuse s....... ............................................265 Whee
lsand tires ...............................267
Importa ntsafe tynotes ........................267
Opera tion............................................267
Winter operation....... ........................... 269
Tire press ure....... ................................ 270
Load ingthe vehi cle....... .......................279
All abo utwhe elsand tires ................... 281
Cha nging awhe el....... ......................... 288
Whee land tirecombi nations .............. .292
Emergency sparewhe el....... ................293 Techn
ical data ................................... 296
Informati onrega rding technical data
....... ............................ .......................... 296
Vehi cleelectronics ..............................296
Identifi cationplates ....... ......................297
Service products andfilling capa ci-
ties ....... ............................................... 298
Vehi cledata ......................................... 303 Co
nten ts
3

driving
andbrakin gaccor dingly during this
break- inperiod.
Ex cessiv eheavy brakingresults incorr espond-
ingly highbrake wear.Observe thebrake sys-
tem warning lampinthe instrument cluster
and noteany brake statusmessages inthe
multifun ction display. Especiallyforhigh per-
form ance driving ,it is import anttomaint ain
and have thebrake system checkedregularly. Driving
onwet road s
Hyd ropla ning If
water hasaccumulated toacert aindepth on
the road surface, thereis adanger ofhydro-
planing occurring.
For this reason, inthe event ofheavy rainorin
con dition sin which hydroplaning mayoccur,
you must driveinthe following manner:
R lower yourspeed
R avoid ruts
R avoid sudden steeringmovem ents
R brake carefully
Driving onflooded roads !
Do
not drive through flooded areas.Check
the depth ofany water before driving
thr ough it.Driv eslowly through standing
water. Otherwise, water couldenterthe
vehicle interior orengin ecompart ment.It
can then damage theengin e'sorautomatic
tran smission 'select ronic compon ents.It
can also besucked inby the engin e'sair
int ake connection andcause enginedam-
age. Winter
driving G
WARN
ING
If you shift down onaslippery roadsurface
in an atte mpt toincr ease theengin e'sbrak-
ing effec t,the drive wheels couldlosetheir
grip. There isan incr eased danger ofskid-
ding andacciden ts.
Do not shift down foradditional enginebrak-
ing onaslippery roadsurface. G
DANGER
If the exhaust pipeisblock edoradequate
vent ilation isnot possible, poisonous gases
such ascarbon monoxide(CO) mayenter
the vehicle. Thisisthe case, e.g.ifthe vehi-
cle becomes trappedinsnow. Thereisarisk
of fatal injury.
If you leave theengin eor the auxiliary heat-
ing runn ing,make suretheexhaust pipeand
area around thevehicle areclear ofsnow.
To ensure anadequate supplyoffresh air,
open awindow onthe side ofthe vehicle
that isnot facin gint othe wind.
Have yourvehicle winter-proofedataqualified
specialist workshopatthe onset ofwinter .
Driv epartic ularly carefully onslippery road
surfaces .Avoid sudden accelerat ion,steer ing
and brakin gmaneuver s.Do not use cruise
con trol.
If the vehicle threatens toskid orcann otbe
stopped whenmovin gat low speed:
X Shift thetran smission toposition 005C.
The outside temperatureindicat orisnot
designed toserve asan ice-warn ingdevice
and isther efore unsuitable forthat purpose.
Changes inthe outside temperaturearedis-
played afterashort delay.
Indic ated temper aturesjustabove thefreez ing
point donot guarantee thattheroad surface is
free ofice. The road maystillbeicy, especially
in wooded areasoron bridges. Thevehicle
could skidifyou failtoadapt yourdriving
style. Always adaptyourdriving styleanddrive
at aspeed tosuit theprevailing weathercondi-
tion s.
You should payspecial attention toroad con-
dition swhen temper aturesarearound freezing
point .
For more information ondriving withsnow
chains, see(Ypage 270).
For more information ondriving withsummer
tires, see(Ypage 269).
Observe thenotesinthe "Winter operation "
sect ion(Ypage 269). Driving
tips
141Driving andparking Z

X
Thoroughly hosedown thevehicle witha
gentle jetofwater.
X Do not point thewater jetdirectly towards
the airinlet orthe edges ofdecorative foils.
X Use plenty ofwater andrinse outthe
sponge frequent ly.
X Rinse thevehicle withclean water anddry
thoroughly withachamois.
X Do not letthe cleaning agentdryonthe
paintwork orthe decorative foils.
Carefully removealldeposits ofroad saltas
soon aspossible whendriving inwinter.
Power washers G
WARNIN
G
The water jetfrom acircular jetnoz zle(dirt
blasters) cancause invisible exteriordam-
age tothe tires orchassis compon ents.
Component sdamaged inthis way may fail
unexpect edly.There isarisk ofan accident .
Do not use power washers withcircular jet
noz zles toclean thevehicle. Havedamaged
tires orchassis compon entsreplaced imme-
diately.
! Vehicles
withdecorative film:parts ofyour
vehicle arecovered withdecorative film.
Maintain adistance ofat least 27.5in
(70 cm) between thefilm-c overed partsof
the vehicle andthenozz leof the power
washer.
Infor mation aboutthecorrec tdistance is
availabl efrom theequipment manufacturer.
Move thepower washer nozzlearound when
cleaning yourvehicle.
The water temperat ureofthe power washer
must notexceed 140‡(60 †).
! Always
maintain adistance ofat least
12 in(30 cm) between thevehicle andthe
power washer nozzle.Infor mation aboutthe
correc tdistance isavailabl efrom theequip-
ment manufact urer.
Move thepower washer nozzlearound when
cleaning yourvehicle.
Do not aim directly atany ofthe following:
R Tires
R Door gaps, roofgaps, joints,etc.
R Elect ricalcompon ents R
Batt ery
R Plug-type couplings
R Light bulbs
R Seals
R Trim elements
R Vent ilation slots
Damaged sealsorelectric alcompon ents
can lead toleaks orfailures.
! If
you clean thetank fillerrecess whenitis
open, donot use apower washer. Thiscan
cause damage tothe seals orother compo-
nent s.
Cleaning thepaint work !
Do
not affix:
R stick ers
R films
R magnetic platesorsimilar items
to painted surfaces. Youcould otherwise
damage thepaintwork .
Scr atches, corrosiv edeposits, areasaffected
by corrosion anddamage causedbyinade-
quate carecannotalway sbe completely
repaired. Insuch cases, visitaqualified spe-
cialist workshop.
X Remove dirtimmediately, wherepossible,
while avoiding rubbingtoohard.
X Soak insect remains withinsect remover
and rinse offthe treated areasafterwards.
X Soak birddroppings withwater andrinse off
the treated areasafterwards.
X Remove treeresin, oils,fuels andgreases by
rubbing gentlywithacloth soaked inpetro-
leum ether orlighter fluid
X Remove coolantandbrake fluidwithamoist
cloth andclear water.
X Use tarremover toremove tarstains.
X Use silicone remover toremove wax.
If water nolonger forms"beads" onthe paint
surface, usethepaint careproducts recom-
mended andapproved byMercedes- Benz.This
is the case approximately everythreetofive
mont hs,depending onthe climate conditions
and thecare product used.
If dirt has penetr atedthepaint surface orif
the paint hasbecome dull,thepaint cleaner
recomm endedandapproved byMercedes-
Benz should beused. Care
247Maintenance andcare Z

teri
stics, e.g.wi nter tires.ATIR EFIT kitmaybe
ob tained fromaqu alifi ed speci alistwo rksh op.
Info rma tionon cha nging and mou nting wheels
(Y page 288 ).
X Stop thevehicleon solid,non-s lipp ery and
le vel ground ,as faraw ay aspossi ble fro m
tra ffic.
X Swi tch onthe hazar dwa rning lamps .
X Secu rethe vehicleag ainst rolling away
(Y page 134 ).
X Ifpo ssi ble, bri ng the frontwh eelsinto the
stra ight-a head positio n.
X Swi tch offthe engine.
X Veh icle swi tho utKEYLES S-G O:rem ove
the Sma rtKeyfro mthe igniti onlock.
X Veh icle swi th KEYLES S-G O:open the driv-
er' sdo or.
The vehicleelectro nicsarenow inpo sitio n
005A. Thisis the same asthe Sma rtKeyha vin g
be en rem oved.
X Veh icle swi th KEYLES S-G O:rem ove the
Star t/Stop button fromthe igniti onlock
(Y page 118 ).
X Ma kesure tha tthe passe nge rsarenot
end angeredas the ydo so. Makesure tha t
no one isnea rthe dange rar ea while a
wh eelis be ing change d.Anyo newhois not
di rectl yas sisti ng inthe wheelcha nge
sho uld, for exa mpl e,sta nd behind the bar-
rie r.
X Ge tou tof the vehicle. Pa yatte ntionto tra f-
fic cond itions when doing so.
X Close thedriver 'sdo or. MOE
xtende dtire s(ti res with run-f lat
prope rties)
Ge neral notes Wi
th MOExte ndedtire s(ti res with runfla t
cha racteri stics) ,yo ucan conti nuetodrive your
veh icleeve nif the reisatota llo ss ofpre ssu re
in one ormor etire s.The affecte dtire mustnot
sho wany clearly vis ible da ma ge.
Yo ucan reco gnizean MOExte ndedtire bythe
MOExte ndedma rking which appe arson the
si de wa llof the tire.Yo uwi llfin dthi sma rking
next tothe tire size designa tion,the load -be ar-
ing capacityand thespee dind ex
(Y page 283 ). MOExte
ndedtire sma yonl ybe used incon-
junc tionwi th an acti vetire pressu reloss wa rn-
ing syste mor with an acti vetire pressu remon-
ito r.
If apres sure loss wa rning mes sage
appe arsinthe multi function displa y:
R ob serve the instructio nsinthe disp laymes -
sa ge s(Y page 201 )
R che ckthe tire fordama ge
R ifdri vin gon, observe the followi ng note s
Th edri vin gdista nce possi ble in run-fl atmod e
is ap pro xim ately50 miles(80 kilome ters)
wh en the vehicleis pa rtia lly la de nand appro x-
im ate ly19 miles(30 kilome ters)wh en the
veh icleis fully la de n.
In additio nto the vehicleload ,the drivin gdis-
tance possi ble de pends upon:
R Veh iclesp ee d
R Ro ad cond ition
R Ou tside temp erature
Th edri vin gdista nce possi ble in run-fl atmod e
ma ybe red uce dby extre medrivin gcond itions
or ma neu vers,or itcan beincr easedthro ugha
mod eratesty leof dri vin g.
Th edri vin gdista nce possi ble in run-fl atmod e
is cou nted fromthe mom entthetire pressu re
lo ss wa rning appe arsin the multifu nctio ndis-
pl ay .
Yo umu stnot exce edama xim um design
sp ee dof 50 mph (80km/h ).
Wh enrep lacing oneoralltire s,plea se observe
the followi ng speci ficati ons foryour veh icle's
tire s:
R Size
R Type and
R Th e"M OExte nded"ma rk
If atire hasgo ne flatand cann otbe rep laced
wi th an MOExte ndedtire ,a sta nda rdtire may
be used asatemp orarymea sure. Makesure
tha tyo uus ethe propersi ze and type(sum mer
or winter tire).
Veh icles equipp ed with MOExte ndedtire sar e
not equipp ed with aTIR EFIT kitatthe factory .
It is the refore recomm endedtha tyo uad ditio n-
al ly eq uip yo ur veh iclewi th aTIR EFIT kitifyo u
mou nttire stha tdo not featureru n-fl atcha rac-
teri stics, e.g.wi nter tires.ATIR EFIT kitcan be
ob tained fromaqu alifi ed speci alistwo rksh op,
for exa mpl e. Fl
at tire
253Break downass istanc e

R
Do not drive with tire swh ich have too little
trea dde pth .Thi ssigni ficantl yred uce sthe
tra ctio non wetroa ds(hyd rop laning ).
R Re place thetiresaf ter six ye arsat the lat-
est, regardless ofwe ar. MOE
xtende dtire s(ti res with run-f lat
prope rties)
Wi th MOExte ndedtire s(ti res with runfla t
cha racteri stics) ,yo ucan conti nuetodrive your
veh icleeve nif the reisatota llo ss ofpre ssu re
in one ormor etire s.
MOExte ndedtire sma yonl ybe used incon-
juncti onwith an acti vetire pressu reloss wa rn-
ing system orwith an acti vetire pressu remon-
ito rand onwheelssp eci fically teste dby
Me rced es-Benz.
Note son drivin gwi th MOExte ndedtire swi th a
fla ttire (Ypage 253 ).
Veh icles equipp ed with MOExte ndedtire sar e
not equipp ed with aTIR EFIT kitatthe factory .
It is the refore reco mme ndedtha tyo uad ditio n-
al ly eq uip yo ur veh iclewi th aTIR EFIT kitifyo u
mou nttire stha tdo not featureru n-fl atcha rac-
teri stics, e.g.wi nter tires.ATIR EFIT kitcan be
ob tained fromaqu alifi ed speci alistwo rksh op. Win
terope ratio n Ge
neral notes
Hav eyo ur veh iclewi nter-p roofed ataqu alifi ed
sp eci alistwo rksh opatthe onse tof winter.
Ob ser vethe note sin the "Cha ngi ng awh eel"
sec tion(Y page 288 ). Dri
ving with summe rtire s
At temp eratures below 45 ‡(+7 †),su mme r
tire slo se elas tici tyand therefore tractio nand
bra king powe r.Ch ang ethe tireson your veh i-
cle toM+S tires.Us ing su mmer tiresatvery
cold tempera turescould cause cracks toform,
thereby damagingthetires perma nently.
Mercede s-Benzcannot acceptresponsi bility
for this type ofdama ge. G
WARNING
Damage dtires cancause tireinflati onpres-
sure loss. Asaresul t,you could losecontrol
of you rvehicl e.There isarisk ofaccide nt.
Check thetires regularlyforsigns ofdam-
age and repla ceany dama gedtires immedi -
ately . M+S
tires G
WARNING
M+S tireswithatire tread depth ofless than
00CF in(4 mm) arenot suitable foruse inwin-
ter and donot provid esuffici enttraction.
There isarisk ofan accide nt.
M+S tireswithatread depth ofless than 00CF
in (4 mm) must berepla cedimmedi ately.
At temperatu resbelo w45 ‡(+7 †), use win-
ter tires orall-season tires.Bothtypes oftire
are identifi edbythe M+S marking.
Only winter tiresbearing the004D snowfla ke
symbo lin add ition tothe M+S marking provide
the best possi blegrip inwintry roadcondi-
tions.
Only these tireswillall ow drivi ngsafety sys-
tems suchasABS andESP®
to function opti-
mall yin winter. Thesetireshave been devel-
oped specifi callyfor drivi nginsnow.
Use M+S tiresofthe same make andtread on
all whee lsto maintai nsafe handl ingcharacter-
istics.
Alwa ysobserve themaximu mpermis sible
speed specifiedfor the M+S tiresyouhave
mounted.
When youhave mounted theM+S tires:
X Check thetire pressu res(Ypage 273).
X Vehic lesforCanada: restartthetire pres-
sure losswarni ngsystem (Ypage 274).
X Resta rtthe tire pressu remonitor
(Y page 274).
Information aboutdrivi ngwith anemergency
spare wheel(Y page 293). Winter
operation
269Wheelsand tires 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

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