MERCEDES-BENZ SLC ROADSTER 2019 Owner's Manual

Battery
acidis cau stic. Avoid con-
tact with skin, eyes orcloth ing.
Wea rsui tabl eprote ctive clothing,
esp ecia lly glo ves, apron and face-
gu ard .
Ri nse anyacidspi lls imme diatel y
wi th clea rwa ter. Contact aphy si-
cia nif neces sary. Wea
rey eprote ction. Kee
pchil drenaw ay. Obs
erve thisOperator'sManu al.
For safety reasons, Merce des-Benz recom -
mends thatyouonly usebatterie swhi chhav e
bee ntested andapprov edfor your vehi cleby
Merce des-Benz. Thesebatterie sprov ide
incre asedimp act prote ction topre vent vehicle
occu pants from sufferi ngacidbu rns shou ld
the battery bedamag edinthe eventofan
acci dent.
In orde rfor the battery toachi evethemaxi -
mum possibleserv icelife, itmus tal wa ysbe
suf ficiently charged.
Like other batterie s,the vehi clebattery may
di scha rgeover time ifyo udo not use thevehi -
cle. Inthis case ,hav ethe battery disconnec-
ted ataqu alifi ed spe cialist wor kshop .You can
al so char gethe battery with achar gerrecom -
mende dby Merce des-Benz. Contact aqu ali-
fie dspe cialist wor kshop forfurth erinfor ma-
tion.
Have thebattery condi tionofchar gechecke d
more frequently ifyo uuse thevehi clemai nly
for shor ttrip sor ifyo ulea veitstand ingidle
for aleng thyperiod.Co nsul ta qu alifi ed spe -
cia list wor kshop ifyo uwi sh tolea veyour vehi -
cle parked foralong period oftime .
Re move theSmartKe yif yo upa rk the vehi cle
and donot require any electrica lconsu mers.
The vehiclewillthen usevery little energ y,
thus conser vingbattery power. If
the pow ersup plyhas beeninterr upted, e.g.
if yo ureconne ctthe battery ,yo uwi llhav eto:
R rese tthe functi onfor automa tically fol ding
the exteri ormirr orsin/ou tby folding the
mirr orsoutonce (Ypage 93)
R set the clock
On vehi cles with amul timed iasystem, the
time isset automa tically. Charg
ingthe battery G
WARNI
NG
Duri ngchar ging andjump -starti ng,expl osive
ga ses can esca pefrom thebattery .The reis
a risk ofan expl osion.
Pa rticu larly avo idfire ,ope nfla mes, creating
spa rks and smoki ng.Ensure thereissuf fi-
cient ventilation whi lechar ging andjump -
starti ng.Donot leanover aba ttery . G
WARNI
NG
Battery acidis cau stic. Thereisarisk of
inju ry.
Avoid contact with skin, eyes orcloth ing.Do
not inha leany battery gases .Do not lean
over thebattery .Kee pchil drenaw ay from
ba tterie s.Wa shaway battery acidimme di-
atel ywi th plenty ofclea nwa ter and seek
med icalattenti on. G
WARNI
NG
A discha rged battery canfreezeattempe ra-
ture sbel ow free zing point. Whe njump -start-
ing the vehi cleorchar ging thebattery ,
ga ses can esca pefrom thebattery .The reis
a risk ofan expl osion.
All ow the frozen battery tothaw outbef ore
char ging itor jump -starti ng.
! Only
usebattery chargers with amaxi mum
char ging voltage of14.8 V.
! On
lycha rge the battery using the jump -
star ting connecti onpoint.
The jump -starti ngconnecti onpointisin the
engi necomp artme nt. Battery
(vehi cle)
259Breakdo wnassi stanc e Z

If
the indicator/wa rninglampsdo not light up
at low temperature s,itis very likely thatthe
discha rgedbattery hasfrozen. Inthis case,
you may neither chargethebattery norjump-
start thevehicle .The service lifeofathawed -
out battery maybeshorter. Thestarting char-
acteristics canbeimpa ired, particul arlyatlow
temperature s.Have thethawed -outbattery
checked ataqua lifiedspecia listworkshop.
Rea dthe battery charger's operatinginstruc-
tions before charging thebattery.
X Open thehood.
X Connect thebattery charger tothe positive
terminal andground pointinthe same order
as when connecting thedonor battery inthe
jump-starting procedure(Y page 260). Replaci
ngthe 12Vbattery
Observe thenotes onthe 12Vbattery
(Y page 257).
Mercedes-Benz recommendsthatyouhave
the 12Vbattery replacedataqua lifiedspe-
ciali stworkshop, e.g.atan authori zed
Mercedes-Benz Center. If
you want torepla cethe battery yourself,
observe thefollow ingnotes:
R Alway srepla ceadefective batterywitha
battery whichmeets thespecific require-
ments ofthe vehicle .
The vehicle isequi pped withanAGM
(Absorbent GlassMat) technology battery.
Full vehicle functionality isonly guaranteed
with anAGM battery. Forsafety reasons,
Mercedes-Benz recommendsthatyouonly
use batteries whichhavebeen tested and
appro vedforyou rvehicle byMercedes-
Benz.
R Use detachab leparts suchasbreather
hoses, angled connecting piecesorterminal
covers fromthebattery whichisto be
repla ced.
R Make surethatthevent hose isalw ays con-
nected tothe origina lopening onthe bat-
tery side.
R Install existing orsupp liedcellcaps topre-
vent gases orbattery acidfrom escapi ng.
R Make surethatthedetachab leparts are
connected againinthe same way. Jump-star
ting
For thejump-starting procedure,use only thejump-starting connectionpointinthe engine com-
partment, consisting ofapositive terminal andaground point. G
WARNING
Battery acidiscaustic. Thereisarisk ofinjury.
Avoid contact withskin, eyesorclothing. Donot inhale anybattery gases.Do not leanover the
battery. Keepchildre nawa yfrom batteries. Washawaybattery acidimmedi atelywithplenty of
clean water andseek medica lattention. G
WARNING
During charging andjump-starting, explosivegases canescape fromthebattery. Thereisa
risk ofan explosi on.
Particul arlyavoid fire,open flames ,creating sparksandsmoking. Ensurethereissufficie nt
ventilation whilecharging andjump-starting. Donot leanover abattery. G
WARNING
During thecharging process,abattery produceshydro gengas. Ifashort circuit occurs or
sparks arecreated, thehydro gengascan ignite. Thereisarisk ofan explosi on. 260
Jump-st
artingBreakd ownassis tance

R
Make surethatthepositive terminal ofaconn ected battery doesnotcome intocontactwith
vehicle parts.
R Never placemetal object sor tools onabattery.
R Itis important thatyouobserve thedescribed orderofthe battery terminals whenconnect-
ing and disconnec tingabattery.
R When jump-st arting,makesurethatthebattery poleswithidentical polarityareconn ected.
R Itis particularly importanttoobserve thedescribed orderwhenconnecting anddisconnec t-
ing the jumper cables.
R Never connectordisconnec tthe battery terminals whiletheengine isrunning. G
WARNING
A discharged batterycanfreeze attemperatures belowfreezing point.Whenjump-st artingthe
vehicle orcharging thebattery, gasescanescape fromthebattery. Thereisarisk ofan explo-
sion.
Allow thefrozen battery tothaw outbefore charging itor jump-st arting.
! Avoid
repeated andlengthy startingattempt s.Otherwise, thecatalytic convertercould be
damaged bythe non- combusted fuel.
If the indicator/warnin glamps donot light upatlow temperatures, itis very likely thatthedis-
charged batteryhasfrozen .In this case, youmay neither chargethebattery norjump-st artthe
vehicle. Theservice lifeofathawed-out batterymaybeshorter. Thestartin gcharacterist icscan
be impaired, particularly atlow temperatures. Havethethawed-out batterycheckedataqual i-
fied specialist workshop.
Do not start thevehicle usingarapid charging device.Ifyour vehicle's batteryisdischarged, the
engine canbejump-st artedfromanother vehicleorfrom adonor battery usingjumper cables.
Observe thefollowing points:
R The battery isnot accessible inall vehicles. Ifthe other vehicle's batteryisnot accessible,
jump-st artthe vehicle usingadonor battery orajump-st artingdevice.
R You may onlyjump-st artthe vehicle whentheengine andexhaust systemarecold.
R Do not start theengine ifthe battery isfrozen .Let the battery thawfirst.
R Only jump-st artfrom batteries witha12 Vvoltage rating.
R Only usejumper cableswhichhaveasufficient cross-sectionandinsulated terminalclamps.
R Ifthe battery isfully discharged, leavethebattery thatisbeing usedtojump-st artconn ected
for afew minutes beforeattempt ingtostart. Thischarges thebattery slightly.
R Make surethatthetwo vehicles donot touch.
Make surethat:
R The jumper cablesarenot damaged.
R Bare parts ofthe terminal clampdonot come intocontactwith other metal partswhile the
jumper cablesareconn ected tothe battery.
R The jumper cablescannot comeintocontactwith parts which canmove whentheengine is
running, suchasthe V-belt pulleyor the fan.
X Secure thevehicle byapply ingthe electric parking brake.
X Shift thetransmission toposition 005D.
X Make surethattheignition isswitched off.Allindicator lampsinthe instrumen tcluster must
be off. When usingtheSmartK ey,turn theSmartK eytoposition 0092inthe ignition lockand
remove it(Y page 118). Jump
-starting
261Breakdown assistance Z

X
Swi tch offallel ectri calconsu mers,e.g. rearwi ndow defroste r,lighti ng,etc.
X Ope nthe hood. Pos
ition numb er0084 identif iesthe chargedba ttery ofthe othe rveh icleor an equ ivalent jump -
star ting device.
X Sli de cove r0043 ofpos itive termi nal0044inthe directi onofthe arrow .
X Co nnect positive termi nal0044onyour veh icleto pos itive termi nal0087ofdono rba ttery 0084using
the jump ercab le,al wa ysbeg inwith pos itive termi nal0044onyour ow nveh iclefirs t.
X Start theengi neofthe dono rveh icleand runitat idling spe ed.
X Co nnect negativetermi nal0085ofdono rba ttery 0084togro und point0083 ofyour veh icleus ing the
jump ercab le,beg inningwith dono rba ttery 0084first.
X Start theengi ne.
X Befo redisconne ctingthejump ercab les, letthe engi nerun forseve ralminu tes.
X Firs t,remo vethe jump ercab lesfrom ground point0083 and nega tivetermi nal0085, then from
pos itive termi nal0044and positive termi nal0087. Begi nea ch time atthe contac tson your ow n
veh iclefirs t.
X Close cove r0043 ofpos itive termi nal0044afte rremo vingthejump ercab les.
X Have thebattery checke dat aqu alifi ed spe cialist wo rksho p.
Ju mp-sta rtingisnot consi deredtobe anorma lope ratingcondi tion.
i Ju
mpe rcab lesand further informa tion regard ing jump -startingcanbeobta inedat any quali-
fie dspe cialist wo rksho p. 26
2 Jump-startin
gBreakdownassistanc e

Tow
ingand tow-starti ng Impo
rtant safety notes G
WA
RNING
Wh entow ingortow -sta rtingano therveh icle
and itsweight isgre atertha nthe permi ssi-
bl e gro sswe ight ofyour veh icle, the :
R the towingeyecou ldde tach itself
R the vehicle/tra iler comb inationcou ldrol l-
ove r.
The reisaris kof an acc ident.
Wh entow ingortow -sta rtingano therveh i-
cle ,its weight sho uld not begre atertha n
the permi ssible gro sswe ight ofyour veh icle.
Deta ils on the permi ssible gro ssveh iclewe ight
of your veh iclecan befou ndonthe vehicle
id enti ficati on plate (Ypage 297 ).
! Wh
enActiv eBra keAssi st,Activ eDis tance
Assi stDISTR ONICor the HOLD functio nis
acti vated ,the vehiclebra kes automa tically
in certa insitua tions.
To avoid da ma getothe vehicle, de acti vate
the sesystem sin the followi ng orsimil arsit-
ua tio ns:
R wh en tow ingthe vehicle
R in the carwash
! Onl
ysec urethe tow ropeor tow barat the
tow ingeyes. Othe rwise, the vehiclecou ldbe
da ma ged.
! Do
not usethe towingeyefor reco very,
thi scou ldda ma gethe vehicle. Ifin do ubt,
reco verthe vehiclewi th acra ne.
! Wh
entow ing,pu llaw ay slow lyand
smo othly.Ifthe tractiv epo we ris too high,
the vehicles cou ldbe dama ged.
! Do
not tow with sling -typ eeq uipme nt.This
cou ldda ma gethe vehicle.
! Wh
entow ingaway veh icles with KEYL ESS-
GO ,us ethe key instea dof the Star t/Stop
bu tton. Theautoma tictransmi ssion may
othe rwise shi ftto positio n005D when you
op en the driver 'sor fro nt-pa ssenge rdo or,
wh ich cou ldda ma gethe transmi ssion. !
Ma
kesure tha tthe electri cpa rkin gbra ke
is rel eased .If the electri cpa rkin gbra keis
fa ulty, visitaqu alifi ed speci alistwo rksh op.
! Yo
uma ytow thevehiclefor ama xim um
di sta nce of30 miles(50 kilome ters).A tow -
ing spee dof 30 mph (50km/h )mu stnot be
exce eded.
For towingdista nces over30 miles
(50 kilome ters),the entireveh iclemu stbe
ra ised and transp orte d.
! Wh
enyouar etow -sta rtingor tow ing
ano therveh icle, its weight mu stnot exce ed
the maxim um permi ssible gro sswe ight of
yo ur veh icle.
It is be tter tohave the vehicletra nsp orte d
tha nto have ittow edaway.
The automa tictransmi ssion mu stbe inpo si-
tio n005C when the vehicleis be ing tow edaway.
The battery mustbe conne ctedandcharged.
Othe rwise, you:
R canno ttur nthe Sma rtKeyto positio n0048 in
the igniti onlock
R canno tshi ftthe automa tictransmi ssion to
po sitio n005C
Dea ctivate the automa ticlocking feature
be for ethe vehicleis tow ed(Ypage 178 ).Yo u
cou ldothe rwise be locked outwh en pushi ng
or tow ingthe vehicle. In
stal ling /re mov ingthe towingey e
In stal ling the towingey e G
WA
RNING
The exhaust tai lpi pe maybe veryhot. There
is aris kof burns when rem oving the rear
cove r.
Do not touchthe exhaust pipe .Ta ke partic u-
la rcar ewh en rem oving the rearcove r. Tow
ingand tow-starti ng
263Break downass istanc e Z

The
bracket sfor the screw-in towingeyeare
located inthe bumpers. Theyareatthe front
and atthe rear, behind thecovers.
X Remove thetowing eyefrom thevehicle tool
kit (Ypage 252).
X Press themark oncover 0043inwards inthe
direction ofthe arrow.
X Take cover 0043offthe opening.
X Scr ew inthe towing eyeclock wiseasfar as
it will goand tighten it.
Removing thetowing eye X
Unsc rewand remove thetowing eye.
X Attach cover 0043tothe bumper andpress
until itengages.
X Place thetowing eyeinthe vehicle toolkit. Towing
avehicle withboth axles on
the ground G
WARNIN
G
You cannolonger steerthevehicle ifthe
steerin gwheel lockhasbeen engaged.
There isarisk ofan accident .
Always switchoffthe ignition whentowing
the vehicle withatow cable oratow bar.
The automatic transmission shiftstoposition
005D automatically whenyouopen thedriver's
or front -passenger doororwhen youremove
the Smart Keyfrom theignition lock. In
order toensure thattheautomatic trans-
mission staysinposition 005Cwhen towing
away thevehicle, youmust observe thefollow-
ing points:
X Switch onthe hazard warning lamps
(Y page 99).
X Turn theSmart Keytoposition 0048inthe igni-
tion lock.
On vehicles withKEYLE SS-GO, usethe
Smart Keyinstead ofthe Start /Stopbutton
(Y page 118).
X Depress andhold thebrake pedal.
X Shift thetrans mission toposition 005C.
X Release thebrake pedal.
X Release theelectric parking brake.
X Leave theSmart Keyinposition 0048inthe
ignition lock.
In order tosignal achange ofdirection when
towing thevehicle withthehazard warning
lamps switched on,use thecombinat ion
switch asusual. Inthis case, onlytheindicator
lamps forthe direction oftravel flash.When
you reset thecombinat ionswitch, thehazard
warning flashersstartflashing again.
It is important thatyouobserve thesafety
instr uctions whentowing awayyourvehicle
(Y page 263). Permit
tedtowing methods
Mercedes- Benzrecomm endstransportin gyour
vehicle inthe case ofabreakdown, ratherthan
towing itaway .
When towing away,use atowing ropeora
towing barwith both axles onthe ground. Do
not use anytow barsystems. Towing
thevehicle withtherear axle
raised
! The
ignition mustbeswitched offifyou
are towing thevehicle withtherear axle
raised. Intervent ionbyESP ®
could other-
wise damage thebrake system.
! Vehicles
withautomatic transmission must
not betowed withtherear axle raised. The
vehicle/t railercombinat ionmay otherwise
swerve oreven rollover. 264
Towing
andtow-sta rtingBr eakdown assistance

Trans
portingthe vehic le
Veh icle swi th auto matic transmission !
Wh
enthe vehicleis load ed for transp ort,
the frontand rearaxl es mu stbe stationar y
and onthe same transp orta tionveh icle.
Po sitio ning overthe conne ctionpo int ofthe
tra nsp ortveh icleis not permi tted .The drive
tra inma yothe rwise be dama ged.
Al lve hic les !
Yo
uma yonl ysec urethe vehicleby the
wh eels,not byparts ofthe vehiclesu ch as
axl eor stee ringcomp onents. Othe rwise, the
veh iclecou ldbe dama ged.
The towingeyecan beused topullthe vehicle
onto atra iler or tra nsp orte rfor transp orting
pu rpo ses .
X Tu rn the Sma rtKeyto positio n0048 inthe igni-
tio nlock.
X Shi ftthe transmi ssion topositio n005C.
As soon asthe vehic lehas been loade d:
X Pre vent thevehiclefro mrol ling away by
ap plying the electri cpa rkin gbra ke.
X Shi ftthe transmi ssion topositio n005D.
X Tu rn the Sma rtKeyto positio n0092 inthe igni-
tio nlock and remove theSma rtKeyfro mthe
ig niti onlock.
X Secu rethe vehicle. Tow
-starti ng(emerg ency engine
starti ng)
! Veh
icles with automa tictransmi ssion mu st
not betow -sta rted .Yo ucou ldothe rwise
da ma gethe automa tictransmi ssion. Yo
ucan find informa tionon "Jum p-starting "at
(Y page 260 ). Fu
ses Impo
rtant safety notes G
WA
RNING
If yo uma nipulate orbridgeafa ulty fuse orif
yo urep lace itwi th afu se with ahighe r
am perage ,the electri ccab lescou ldbe ove r-
lo ad ed .Thi scou ldres ultin afir e. The reisa
ris kof an acc ident and injury.
Alw aysrep lace faulty fuses with the speci -
fie dnew fuses havin gthe corr ectamperage .
Blo wn fuses mustbe rep laced with fuses of
the same rating ,wh ich youcan reco gnizeby
the colorand value. The fuse rating sar elisted
in the fuse allo cati oncha rt.
The fuse allo cati oncha rtis locate din the vehi-
cle tool kitinthe stow agecomp artment under
the trunk floor (Y page 252 ).
If anew lyins erte dfu se also blow s,ha ve the
cau setraced and recti fiedat aqu alifi ed spe-
cia list wo rksh op,e.g .an author izedMe rced es-
Benz Center.
! Onl
yus efu ses thatha ve been appro ved
for Merced es-Benz vehicles and which have
the corr ectfuse rating forthe system con-
cern ed.Othe rwise, comp onents orsystem s
cou ldbe dama ged.
! Ma
kesure tha tno moi sturecan ente rthe
fu se boxwh en the cove ris op en.
! Wh
enclosing the cove r,ma kesure tha tit
is lying corr ectlyon the fuse box.Moi sture
see ping inor dirt cou ldothe rwise imp airthe
op era tionof the fuses .
The fuses inyour veh icleser vetoclo sedown
fa ulty cir cui ts. Ifafu se blow s,allthe comp o-
nents onthe circui tand theirfunctio nsstop
op era ting . Bef
ore chang ingafus e
X Swi tch offthe engine.
X Swi tch offallel ectri calcons umers. Fu
ses
265Break downass istanc e Z

X
Make surethattheignition isswitched off
(Y page 118).
or
X When usingtheSmartK ey,turn theSmart-
Key toposition 0092inthe ignition lockand
remove it(Y page 118).
X Secure thevehicle against rollingaway
(Y page 134).
All indicator lampsinthe instrumen tcluster
must beoff.
The fuses arelocated invarious fuseboxes:
R Fuse boxinthe engine compartmen ton the
left-hand sideofthe vehicle, whenviewed in
the direction oftravel
R Fuse boxinthe trunk Fuse
boxinthe engine compart ment
i Observe
the"Important safetynotes" sec-
tion (Ypage 265). G
WARNING
When thehood isopen andthewindshield
wipers aresetinmotion, youcan beinjured
by the wiper linkage. Thereisarisk ofinjury.
Always switchoffthe windshield wipersand
the ignition beforeopening thehood. X
Make surethatthewindshield wipersare
turned off.
X Open thehood.
X Use adry cloth toremove anymoisture
from thefuse box.
X To open: openclamps 0044.
X Remove fuseboxcover 0043forwards. X
To close :check whether theseal islying
correct lyin cover 0043.
X Insert cover0043atthe rear ofthe fuse box
into theretainer.
X Fold down cover 0043and close clamps 0044.
X Close thehood. Fuse
boxinthe trunk
i Observe
the"Important safetynotes" sec-
tion (Ypage 265). The
fuse boxislocated inthe trunk behind the
partition covering.
X Open thetrunk lid.
X To open: release cover0043onthe right and
left-hand sideswithaflat object .
X Open cover 0043downwards inthe direction
of the arrow. 266
FusesBr
eakdown assistance

Imp
ortant safety notes G
WAR
NING
If you installwhee lsand tires withinc orrect
dime nsion s,theser vicebrak eor whee lsus-
pen sion compo nentsmay bedamag ed.
Ther eis aris kof an acc iden t.
Alw ays replace whee lsand tires withon es
th at comply withth espec ificationsof the
ori gin alpart .
When replaci ngwhee ls,pay attention tothe:
R De sign ation
R Mode l
When replaci ngtires ,pay attention tothe:
R De sign ation
R Man ufacturer
R Mode l G
WAR
NING
A flat tire will severelyaff ectth edriv ing
ch arac teris tics as well asthest eer ing and
brak ingoftheveh icle. Ther eis aris kof an
acc iden t.
Tir es wit hout run-flat charac teris tics :
R Do notdriv eon withaflat tire.
R Chan getheflat tire imm ediat elywithan
eme rgencyspar ewhee lor spar ewhee l.
Alt ern ativel y,co nsult aqualif iedspec ialist
wor kshop.
Tir es wit hrun -flat charac teris tics :
R Obs erveth einf orm ation and warn ing
no teson MOE xten ded tires (run -flat tires ).
Ac cesso ries that are notappr ovedfor your
veh icleby Mer cedes- Benzor are notbein g
used correc tly can impa irth eoper ating safety.
Bef ore purc hasingand usingno n-appr oved
acc essories, visitaqualif iedspec ialist work-
sho pand askabout :
R suit abilit y
R legal stipulat ions
R fac tory rec omm endat ions
Fur ther inform ation reg ardi ngwhee lsand tires
can befoun dund er"Whee l/tire combin ations"
(Y page 292). You
canaskforinform ation reg ardi ngper mit-
te dwhee l/tire combin ationsat an auth orized
Mer cedes- BenzCen ter.
In for mat ionontire pre ssur ecan befoun d:
R on theTir eand Load ingInfor mat ionplac ard
on theB- pillar onthedriv er'sside
(Y page 279)
R in thetire pre ssur etab lein thefuel filler flap
(Y page 133)
R in the"Tir epre ssur e"sec tion Op
era tion Infor
mation ondrivin g
Chec kth etire pre ssur ewhen theveh icleis
heav ilyladen andadjust prio rto atrip.
While driving,pay attention tovibr ations,
no ises andunus ualhan dlingch arac teris tics ,
e. g. pullin gto oneside .This may indicat eth at
th ewhee lsor tires are damag ed.Ifyou sus-
pec tth at atire isdef ective, reduce your speed
imm ediat ely.Stop theveh icleas soo nas pos -
sible tocheckth ewhee lsand tires fordam-
age. Hidden tire damag eco uld also becaus ing
th eunus ualhan dlingch arac teris tics .If you
fin dno sign sof damag e,hav eth etires and
whee lsch ecke dat aqualif iedspec ialist work-
sho p.
When parkingyour vehicle, mak esur eth at the
ti res donotget deform edbythecur bor other
obs tacles. Ifth ey can notbe avoi ded, drive
ove robs tacles suc has cur bsslow lyand atan
obt use angle.Other wise, youmay damag eth e
whee lsor tires . Reg
ularcheck ingofwheels andtires G
WAR
NING
Dam aged tires can caus etire inflat ion pres-
sur eloss .As ares ult,you could lose control
of your vehicle. Ther eis aris kof acc iden t.
Chec kth etires regularly forsign sof dam-
age and replace anydamag edtires imm edi-
ate ly. Op
era tion
267Wheels andtire s Z

Chec
kwheel sand tires for damag eat least
on ce amon th.Chec kwheel sand tires after
driv ingoff-road oron roug hroad s.Dam aged
wheel scan caus ealoss oftirepre ssur e.Pay
part icular attentio nto damag esuc has:
R cut sin thetir es
R punc tures inthetir es
R tears inthetir es
R bulges ontires
R def orm ationor sev ere corrosio non wheel s
Regular lych eck thetir etread dept hand the
co ndi tionof thetread across thewhole width
of all tires (Y page 268). Ifne ces sary, turnth e
fr on twheel sto full lockin ord erto ins pec tth e
inn erside ofthetir esurf ace.
All wheel smust haveavalv ecap topro tect
th evalv eagain stdirt and mois ture.Do not
moun tanyt hingon to thevalv eot her than the
st and ard valvecap orother valvecaps
appro vedbyMer cedes-Ben zfor your vehicle.
Do notuse anyother valvecaps orsyst ems ,
e.g .tir epre ssur emon itorin gsyst ems .
Regular lych eck thepre ssur eof all thetir es
part icular lyprio rto lon gtrips. Adjus tth etir e
pre ssur eas neces sary (Ypage 270).
Obse rveth eno teson theeme rgencyspar e
wheel (Ypage 293).
The servicelife oftires depen ds,amon got her
th ing s,on thefoll owin gfac tors:
R Dr ivin gst yle
R Tire pressur e
R Dis tan cecover ed Not
eson tiretread G
WAR
NING
If th ere isins ufficie nttiretread, thetir etrac-
tio ndec reas es.The tiretread isno longer
able todiss ipatewate r.This increas esthe
ris kof hydr oplan ingwhen theroad surface
is wet ,part icular lywhen theveh icle'sspee d
is no tadapt edtotheroad condi tions.Ther e
is aris kof an acc iden t.
When thetir epre ssur eis toohigh ortoo
low, tires may wear differe ntly at diff ere nt
poin tson thetir etread. Therefore, regularly
ch eck thetir etread dept hand theco ndi tion of
thetread across thewhole widthof all
tir es.
Min imum tiretread dept hon :
R Sum mer tires: 00CEin(3 mm)
R M+S tires: 00CFin(4 mm)
For safe tyreas ons,have thetir es rep lace d
bef ore they reac hth elegally prescribe dmin -
imum tiretread dept h. Mark
ing0043sho wswher eth ebar indicat orfor
tr ead wear (arrow) isint egr atedint oth etir e
tr ead.
Tre adwear indicat ors (TWI )are required by
law. Sixindicat ors are posi tionedon thetir e
tr ead. They arevisible once atread dept hof
appr oximat ely00CD in(1.6 mm)ha sbe en
re ach ed. Ifth is isthecas e,thetir eis so worn
th at itmust berepl aced . Select
ing,mou nting and replacing
tir es
Tire sand wheels
R On lymoun ttir es and wheels ofthesame
type andmake.
Ex cep tion:itis perm issibleto moun ta dif-
fer ent type ormak ein theeven tof aflat
tir e. Obse rveth e"MOE xtend edtires (tires
with run-flat charac terist ics)"sec tion
(Y page 253).
R On lymoun ttir es ofthecor rectsiz eon to the
wheels .
R Break innew tires atmode ratespee dsfor
th efir st 60 miles (100km). Thenew tires
on lyreac hth eir full perf ormanceaft erthis
dist ance. 268
Oper
ationWh eels andtires