ECU MERCEDES-BENZ SL CLASS 2020 Repair Manual

If
apr essu reloss warning message
ap pea rsinthemu ltifu nct ion displa y:
R obse rveth eins truct ionsin thedispl aymes -
sages (Ypage 230)
R ch eck thetir efor damag e
R ifdriv ingon,obse rveth efoll owin gno tes
The drivingdist anceposs ibleinrun -flat mod e
is appro ximately50 miles (80kilome ters)
when theveh icle ispart ially laden andappro x-
imat ely19miles (30kilome ters) when the
veh icle isfully laden .
In addit iontotheveh icle load, thedriv ingdis-
tan ceposs ibledepen dsupon :
R Vehi clespee d
R Road condition
R Out side temper ature
The drivingdist anceposs ibleinrun -flat mod e
may bereduc edbyext rem edriv ingcon dition s
or man euver s,or itcan beincreas edthroug ha
mod eratest yle ofdriv ing.
The drivingdist anceposs ibleinrun -flat mod e
is coun tedfrom themom entthetir epres sure
loss warn ingappear sin themult ifunction dis-
play.
You must notexc eed amax imum design
spee dof 50 mph (80km/h).
When replacin gon eor all tires, please observe
th efoll owin gspec ificatio nsfor your vehicle's
tir es:
R Siz e
R Type and
R The "MOE xtend ed" marking
If atir ehas goneflat and cannotbe repl aced
with anMOE xtend edtire, ast andar dtir emay
be used asate mpo rarymeas ure.Makesure
th at you usethepro per sizeand type (summer
or wint ertire).
Vehi clesequippe dwith MOExtend edtires are
no tequippe dwith aTIRE FITkit atthefac tory.
It is theref orerecomm endedthat you addit ion-
ally equip yourvehicle with aTIRE FITkit ifyou
moun ttir es that do notfeat ure run-flat charac -
te ris tic s,e.g .wint ertires. ATIRE FITkit can be
obt aine dfrom aqualifi edspec ialist workshop,
for exam ple. Imp
ortant safety notes G
WAR
NING
When youdrivein emer gencymod e,the
han dlingch arac teris tic sare impair ed.e.g.
when cornerin g,when acceler atingst ron gly
and when braking.Ther eis aris kof an acc i-
den t.
Do notexc eed themax imum specified
spee d.Avoid any abrupt steer ing and driving
man euver sas well asdriv ingoverobst acles
(cur bs,pot holes ,off -road). Thisapplies ,in
part icular ,to aloaded vehicle.
St op driv inginemer gencymod eif you
no tice:
R bang ingnoise
R veh icle vibratio n
R smo kewhic hsme llslikerubbe r
R con tinuous ESP®
int erv entio n
R crack sin thetir eside walls
Af terdriv inginemer gencymod e,have the
rim sch eck edbyaqualifi edspec ialist work-
sho pwith regard totheir further use. The
def ective tiremust berepl aced ineve ry
cas e. TIR
EFIT kit
Imp ortant safety notes TIRE
FITis atir esealan t.
You canuseTIRE FITto seal punc tures ofup to
0. 16 in(4 mm ),part icular lythose inthetir e
tr ead. YoucanuseTIRE FITat out side temper a-
tur es down to00F84 ‡(00F82 0†). G
WAR
NING
In thefoll owin gsit uatio nsinpart icular ,th e
tir esealan tis unabl eto pro vide sufficient
break down assistanceasitcan notseal the
tir epro perl y:
R there arecutsor punc tures inthetir e
large rth an those men tionedprev iously.
R thewheel rimisdamag ed.
R you have drivenatver ylow tirepres sures
or on aflat tire. 282
Flat
tireBr eak down assistance

!
Have
thebattery regularlychecked ata
qual ified speciali stworkshop.
Comply withtheservice intervals inthe
Maintenance Booklet,orcont actaqual ified
speciali stworkshop formore information.
! Alway
shave work onbatteries carriedout
at aqual ified speciali stworkshop.
Should it,inexceptional circumstances, be
absolu telynecessary todisconnect the12-
volt battery yourself,please observe thefol-
lowing:
R Secure thevehicle toprevent itfrom roll-
ing awa y.
R Switch offthe ignition.
R Disconn ectthe negative terminalfirstand
then thepositive terminal.
After thework hasbeen done, install the
battery andreplace thecover ofthe positive
terminal clampfirmly.
Comply withsafety precautions andtake pro-
tect ivemeasures whenhandling batteries. Risk
ofexplosion. Fire,
open flames andsmoking are
prohibited whenhandling thebat-
tery. Avoid creating sparks. Battery
acidiscaustic. Avoidcon-
tact with skin, eyesorclothing.
Wear suitabl eprotective clothing,
especial lygloves, apronandface-
guard.
Rinse anyacid spills immediately
with clear water. Contact aphysi-
cian ifnecessary. Wear
eyeprotection. Keep
children away. Observe
thisOperator's Manual.
For safety reasons, Mercedes-Benz recom-
mends thatyouonly usebatteries whichhave been
tested andapproved foryour vehicle by
Mercedes-Benz .These batteries provide
increased impactprotection toprevent vehicle
occupants fromsuffering acidburns should
the battery bedamage din the event ofan
accident.
In order forthe battery toachieve themaxi-
mum possible servicelife,itmust alwaysbe
sufficiently charged.
Like other batteries, thevehicle battery may
discharge overtime ifyou donot use thevehi-
cle. Inthis case, havethebattery disconnec-
ted ataqual ified speciali stworkshop. Youcan
also charge thebattery withacharger recom-
mended byMercedes-Benz .Contact aqual i-
fied speciali stworkshop forfurther informa-
tion.
Have thebattery condition ofcharge checked
more frequently ifyou usethevehicle mainly
for short tripsorifyou leave itstanding idle
for alengthy period.Consult aqual ified spe-
cialist workshop ifyou wish toleave yourvehi-
cle parked foralong period oftime.
Remove theSmartKey ifyou park thevehicle
and donot require anyelectrical consumers.
The vehicle willthen usevery little energy,
thus conserving batterypower.
After aninterruption tothe power supply,e.g.
due toadischarged battery,youmust reset
the clock (seetheDigital Operator's Manual). Charging
thebattery G
WARNING
During charging andjump-startin g,explosive
gases canescape fromthebattery. Thereis
a risk ofan explosion.
Particularl yavoid fire,open flames, creating
sparks andsmoking. Ensurethereissuffi-
cient ventilation whilecharging andjump-
starting. Donot lean over abattery. G
WARNING
Battery acidiscaustic. Thereisarisk of
injury.
Avoid contactwith skin, eyesorclothing. Do
not inhale anybattery gases.Donot lean
over thebattery. Keepchildren awayfrom
batteries. Washawaybattery acidimmedi- Bat
tery (vehic le)
287Breakdown assistance
Z

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 126).
X Switch offallelectrical consumers, e.g.rear window defroster, lighting,etc.
X Open thehood. Position
number0084identifies thecharged batteryofthe other vehicle oran equival entjump-
startin gdevice.
X Press cover0043ofpositive terminal 0044down (inthe direction ofthe arrow) andturn itclock-
wise. Toexpose positive terminal 0044,press cover 0043down further.
X Connect positiveterminal 0044onyour vehicle topositive terminal 0087ofdonor battery 0084using
the jumper cable,alwaysbegin withpositive terminal 0044onyour ownvehicle first.
X Start theengine ofthe donor vehicle andrunitat idling speed.
X Connect negative terminal0085ofdonor battery 0084toground point0083ofyour vehicle usingthe
jumper cable,beginning withdonor battery 0084first.
X Start theengine.
X Before disconnec tingthejumper cables,letthe engine runforseveral minutes.
X First, remove thejumper cablesfromground point0083and negative terminal0085,then from
positive terminal 0044and positive terminal 0087.Begin eachtimeatthe cont acts onyour own
vehicle first.
X Aft erthe jumper cableisremoved, returncover0043ofpositive terminal 0044tothe original posi-
tion. Positive terminal 0044iscovered upand thus insulated again.
X Have thebattery checkedataqual ified specialist workshop.
Jump-starting isnot considered tobe anormal operating condition. 290
Jump
-startingBr eakdown assistance

When
towing away,useatowing 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. Interven tionbyESP®
could other-
wise damage thebrake system.
! Vehicles
withautomatic transmission must
not betowed withtherear axle raised. The
vehicle/t railercombin ationmayotherwise
swerve oreven rollover. Tr
anspor tingthevehicle
Vehicles withautomat ictransmission !
When
thevehicle isloaded fortran sport,
the fron tand rear axles mustbestation ary
and onthe same transportat ionvehicle.
Position ingover theconn ection pointofthe
tran sport vehicle isnot permitt ed.The drive
train mayotherwise bedamaged.
All vehicles !
You
may onlysecure thevehicle bythe
wheels, notbyparts ofthe vehicle suchas
axle orsteerin gcompon ents.Other wise, the
vehicle couldbedamaged.
The towing eyecan beused topull thevehicle
ont oatrailer ortran sporter fortran sportin g
purposes. X
Turn theSmart Keytoposition 0048inthe igni-
tion lock.
X Shift thetran smission toposition 005C.
As soon asthe vehicle hasbeen loaded:
X Preven tthe vehicle fromrolling awayby
applying theelectr icparking brake.
X Shift thetran smission toposition 005D.
X Turn theSmart Keytoposition 0092inthe igni-
tion lock andremove it.
X Secure thevehicle. Tow-sta
rting (emergency engine
star ting)
! Vehicles
withautomatic transmission must
not betow-s tarted. You could otherwise
damage theautomatic transmission.
You canfind inform ationon"Jump-start ing"at
(Y page 288). Fuses
Impor
tantsafety notes G
WARNIN
G
If you manipulate orbridge afaulty fuseorif
you replace itwith afuse withahigher
amperage, theelectr iccables couldbeover-
loaded. Thiscould result inafire. There isa
risk ofan accident andinjury.
Always replace faultyfuseswiththespeci-
fied new fuses having thecorr ectamperage.
Blown fusesmustbereplaced withfuses of
the same rating,which youcan recogn izeby
the color andvalue. Thefuse rating sare listed
in the fuse allocation chart.
The fuse allocation chartislocated inthe vehi-
cle tool kitinthe stowage compartmentunder
the trun kfloor (Ypage 280).
If anewly insertedfuse alsoblows, havethe
cause tracedand rectified ataqualified spe-
cialist workshop, e.g.anauthorized Mercedes-
Benz Center .
! Only
usefuses thathave been approved
for Mercedes- Benzvehicles andwhich have
the corr ectfuse rating forthe system con- Fuses
293Breakdown assistance Z

cerned
.Other wise, comp onents orsystems
cou ldbe damag ed.
! Ma
kesure that nomoi stur ecan enter the
fus ebox whenthe cover isope n.
! Whe
nclos ingthe cover ,make sure that it
is lying corre ctlyonthe fusebox. Moistur e
see ping inor dirt cou ldothe rwiseimp airthe
ope rationofthe fuses.
The fusesinyour vehi cleserv eto clos edow n
fau ltycircu its.Ifafus eblow s,allthe comp o-
nents onthe circu itand theirfuncti onsstop
ope rating. Befo
rechan ging afuse
X Swi tch offthe engi ne.
X Swi tch offallel ectri calconsu mers.
X Ma kesure that theignition isswi tched off
(Y page 126 ).
or X Whe nus ing the SmartK ey,turn theSmart-
Key topos ition 0092 inthe ignition lock and
remo veit(Y page 126 ).
X Secu rethe vehi cleagainst rolling away
(Y page 147 ).
All indi cator lamps inthe instru ment cluster
mus tbe off.
The fusesare loca tedinvari ousfus eboxe s:
R Fus ebox inthe engi necomp artme nton the
rig ht-ha ndsideof the vehi cle,whe nvie we d
in the directi onoftrave l
R Dash boardfus ebox
R Fus ebox inthe rearcomp artme nton the
rig ht-ha ndsideof the vehi cle,whe nvie we d
in the directi onoftrave l Das
hboard fuse box
i Obs
erve the"Important safety notes" sec-
tion (Ypage 293 ).
! Do
not useapoi nted objectsuch asa
screw driver toope nthe cover inthe dash-
boa rd.You couldda mag ethe dashb oard or
the cover . X
Ope nthe driver' sdoo r.
X To ope n:pullcover 0043outwa rds inthe
di recti onofthe arrow and remo veit.
X To clos e:clipin cover 0043onthe front ofthe
da shb oard.
X Fold cover 0043inw ardsunti lit enga ges. Fus
ebo xin the engine compartment
i Obs
erve the"Important safety notes" sec-
tion (Ypage 293 ). G
WARNI
NG
Whe nthe hoodis ope nand thewindsh ield
wi per sare setinmotio n,youcan beinju red
by the wiper linkage .The reisaris kof inju ry.
Alw aysswi tch offthe windsh ield wiper sand
the ignition before opening thehood. X
Ope nthe hood.
X Use adry cloth toremo veany moistur e
from thefusebox.
X To ope n:ope ncla mps 0044.
X Fold cover 0043ofthe fusebox upinthe
di recti onofthe arrow and remo veit. 294
Fus
esBreakdo wnassi stanc e

X
To clos e:che ckwhethe rthe sealis sea ted
corr ectlyin cove r0043.
X Inse rtbo th openi ngs 0087atthe rearof
cove r0043 into thebrackets onthe fusebo x.
The brackets onthe fusebo xmu stbe com-
pl etel yvis ible in the two openi ngs 0087onthe
fus ebo x.
X Fol ddo wn cove r0043.
X Hoo kcla mps 0044into thefusebo xand
clo se.
X Close thehood. Fus
ebo xin the rear pass engerco m-
partmen t
i Obs
ervethe "Impo rtant safety notes "sec-
tio n(Y page 293 ). The
fusebox inthe rearis locate don the right-
ha nd side when viewe din the directi onoftrav el.
X To ope n:open the seatbe ltgu ide on the
rig ht-ha ndsea tand remove theseatbe lt
(Y page 99).
X Mov ethe right-ha ndsea tas far forw ardas
po ssi ble (Y page 100 ). X
Inse rtyo ur fing ers atthe bottom offront
cove r0044 betwe enthe cove rand floor cove r-
ing .
X Re move frontcover0044 bypulling itforw ard
in the directi onofthe arrow .
X Lif toff top cove r0043 bypulling itin the direc-
tio nof the arrow . Fus
es0087 are acce ssible thro ughthe two open-
ing sin the top ofthe fusebo x.
X To clos e:ins ert the secu ringtagsund er-
nea thtop cove r0043 inthe rece ssesat the
top ofthe fusebo x.
X Fol ddo wn top cove r0043 unti lit enga ges
au dibly.
X Inse rtthe secu ringtagsund erne athtop
cove r0044 inthe rece ssesat the front ofthe
fus ebo x.
X Pu sh front cover0044 tow ardsthe rearunti lit
enga gesaudibly.
X Mov ethe right-ha ndsea tba ckwa rds
(Y page 100 ).
X Hoo kthe seatbe ltinto theseatbe ltgu ide
on the right-ha ndsea t(Y page 99). Fu
ses
295Breakdo wnassis tan ce Z

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 321). 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 306)
R in thetire pre ssur etab lein thefuel filler flap
(Y page 146)
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. 296
Op
era tionWh eels andtire s

Imp
ortant noteson tire pressu re G
WAR
NING
If th etire pre ssur edro psrep eatedly, the
whee l,valv eor tire may bedamag ed.Tire
pre ssur eth at istoolow may result inatire
blow- out.Ther eis aris kof an acc iden t.
R Chec kth etire for foreign objects.
R Chec kwhet herthewhee lis losi ngair or
th evalv eis leak ing.
If you areunab leto rec tify thedamag e,con-
tac ta qualif iedspec ialist workshop. G
WAR
NING
If you fituns uitable accessories onto tire
valv es,thetire valv esmay beove rloaded
and malf unction ,whic hcan caus etire pre s-
sur eloss .Due totheir desi gn,ret rofitte dtire
pre ssur emon itors keep thetire valv eopen .
This canalso result intire pre ssur eloss .
Ther eis aris kof an acc iden t.
On lyscrew thest and ard valvecap orother
valv ecap sappr ovedby Mer cedes- Benzfor
your vehicleon to thetire valv e.
Use asuit able pressur egauge tocheckth e
ti re pre ssur e.The outerappear anceof atire
does notper mit any reliable conclusio nabout
th etire pre ssur e.On veh icles equipp edwith
th eelec tron ictire pre ssur emon itor, thetire
pre ssur ecan bechecke din theon -board com-
put er.
The tire tempe rature and pressur einc reas e
when theveh icleis in mot ion.This isdepe nd-
en ton thedriv ingspee dand theload.
Ther efore, you should onlyco rrec ttire pre s-
sur eswhen thetires are cold.
The tires are cold:
R ifth eveh iclehas been parkedwithth etires
out ofdire ctsun lightfor atleast three hour s
and
R ifth eveh iclehas notbeen drivenfurther
th an 1mile (1.6km)
The tire tempe rature chang esdepe nding on
th eout side tempe rature, theveh iclespee d
and thetire load. Ifth etire tempe rature
ch ang esby 18 ‡(10 †), thetire pre ssur e
ch ang esby appr oximat ely10kPa(0. 1bar/
1. 5psi) .Tak eth is int oacc oun twhen checkin g th
epre ssur eof warm tires .On lyco rrec tth e
ti re pre ssur eif it is toolow forthecur ren t
oper ating cond ition s.Ifyou checkth etire
pre ssur ewhen thetires are warm ,th eres ult-
ing value willbehigh erthan ifth etires were
co ld. This isno rm al. Do notred uce thetire
pre ssur eto thevalue specifiedfor cold tires .
The tire pre ssur ewould other wise betoolow.
Obs erveth erec omm ended tire pre ssur esfor
co ld tires :
R on theTir eand Load ingInfor mat ionplac ard
on theB- pillar onthedriv er'sside
R in thetire pre ssur etab leon theins ide ofthe
fuel filler flap Und
erinflated orover inflated tires
Und erinflated tires G
WAR
NING
Tir es wit hpre ssur eth at istoolow can over-
heat andburs tas aco nsequen ce.In addi-
ti on ,th ey also suffer from exce ssiv eand /or
irr egular wear,whic hcan severelyimpa irth e
brak ingproperties and thedriv ingcharac ter-
ist ics .Ther eis aris kof an acc iden t.
Av oid tire pre ssur esthat are toolow inall
th etires ,inc ludin gth espar ewhee l.
Un der inflat ed tires may:
R ove rheat,leadin gto tire def ects
R adve rselyaff ecthan dling
R wear exce ssiv elyand /orune venly
R hav ean adve rseeffecton fuel consumpt ion
Over inflated tires G
WAR
NING
Tir es wit hex ce ssiv elyhigh pressur ecan
burs tbec ause they are damag edmor eeas-
ily by road debris,pot hole set c. In addit ion,
th ey also suffer from irregular wear,whic h
can severelyimpa irth ebrak ingproperties
and thedriv ingcharac teris tics .Ther eis a
ris kof an acc iden t.
Av oid tire pre ssur esthat are toohigh inall
th etires ,inc ludin gth espar ewhee l. Ti
re pressu re
301Wheels andtire s Z

Overinflated
tiresmay:
R increase thebraking distance
R adversely affecthandling
R wear excessively and/orunevenly
R have anadverse effectonride comfort
R be more susceptible todamage
Maximum tirepressures 0043
Example: maximum permissibletire pres-
sure
Never exceed themaximum permissibletire
inflation pressure. Alwaysobserve therecom-
mended tirepressure foryour vehicle when
adjusting thetire pressure (Ypage 299).
i The
actual valuesfor tires arevehicle-spe-
cific andmay deviate fromthevalue sin the
illu stration. Checki
ngthe tire pressures
Importa ntsafety notes The
tirepressure monitordoesnotwarn you
of:
R incorrect lyset tire pressure
R sudden lossoftire pressure, e.g.from afor-
eign object thathaspenetrated thetire
Observe thenotes ontire pressure
(Y page 299).
Information onair pressure forthe tires on
your vehicle canbefound:
R on the vehicle's TireandLoading Informa-
tion placard onthe B-pillar
R on the tire pressure tableinthe fuel filler
flap
R in the "Tire pressure" section Checki
ngtire pressures manually To
determine andsetthe correct tirepressure,
proceed asfollows:
X Remove thevalve capofthe tire that isto
be checked.
X Press thetire pressure gaugesecurely onto
the valve.
X Read thetire pressure andcompare itto the
recommended valueonthe Tire andLoading
Information placardorthe tire pressure
table (Ypage 299).
X Ifthe tire pressure istoo low, increase the
tire pressure tothe recommended value.
X Ifthe tire pressure istoo high, release air.
To do so, press downthemetal pininthe
valve, usingthetipofapen forexample.
Then check thetire pressure againusing the
tire pressure checker.
X Screw thevalve caponto thevalve.
X Repea tthese stepsforthe other tires. Tire
pressure monitor
General notes If
atire pressure monitorisinstalled, thevehi-
cle's wheels havesensors thatmonitor thetire
pressures inall four tires. Thetirepressure
monitor warnsyouifthe pressure dropsinone
or more ofthe tires. Thetirepressure monitor
only functions ifthe corresponding sensors
are installed inall wheels.
Information ontire pressures isdispla yedin
the multifunction display.After afew minutes
of driving, thecurrent tirepressure ofeach tire
is shown inthe Serv. Serv.
menuofthe multifunc-
tion displa y. Example:
currenttirepressure display
For information onthe message display,refer
to the "Checking thetire pressure electroni-
cally "section (Ypage 304). 302
Tire
pressur eWheels andtires

Imp
ortant safety notes G
WAR
NING
Eac htire, includin gth espar e(if pro vide d),
sho uld bechecke dat least once amon th
when cold and inflat ed tothepre ssur erec -
omm ended bytheveh icleman ufactureron
th eTir eand Load ingInfor mat ionplac ardon
th edriv er'sdoor B-pillar orthetire pre ssur e
label ontheins ide ofthefuel filler flap .If
your vehiclehas tires ofadif fer entsiz eth an
th esiz eind icat edon theTir eand Load ing
In for mat ionplac ardorthetire pre ssur e
label, youshould determ inethepro per tire
pre ssur efor those tires .
As anadded safetyfeat ure, your vehiclehas
been equipp edwithatire pre ssur emon itor-
ing syst em(TPM S)that illum inatesa low tire
pre ssur ete lltale when oneor mor eof your
ti res are sign ificant lyund erinflat ed. Accord-
ing ly,when thelow tire pre ssur ete lltale illu-
min ates,you should stop and checkyour
ti res assoo nas pos sible ,and inflat eth em to
th epro per pressur e.Drivin gon asign ifi-
can tly und erin flatedtire caus esthetire to
ove rheatand canlead totire failur e.Un der -
inf lat ion also reduce sfuel efficien cy and tire
tr ead life,and may affectth eveh icle's han -
dlin gand stoppi ngabilit y.
Pleas eno te that theTPM Sis no ta subs ti-
tut efor proper tire main tenan ce,and itis
th edriv er'sres pon sibil ity to main tainco r-
rec ttire pre ssur e,eve nif und erinflat ion has
no treac hedthelev elto trigge rillum ination
of theTPM Slow tire pre ssur ete lltale.
US Aon ly:
Your vehiclehas also been equipp edwitha
TPM Smalf unction indicat ortoind icat eif th e
syst emisno toper ating pro perly.The TPM S
malf unction indicat orisco mbin edwithth e
low tire pre ssur ete lltale. When thesyst em
det ects amalf unction ,th ewarn inglamp will
flas hfor appr oximat elyamin ute and then
rem aincontinuo usly illum inated. This
seque ncewill berep eatedeve rytime the
veh icleis start ed aslon gas themalf unction
ex ist s. When
themalf unction indicat orisillum ina-
te d, thesyst emmay notbe able todet ector
sign allow tire pre ssur eas intended. TPMS
malf unction smay occur foravar ietyof rea-
son s,inc ludin gth emoun ting ofinc omp ati-
ble replace men tor altern ate tires orwhee ls
on theveh icleth at pre ven tth eTPM Sfrom
fun ction ing properly.Alw ays checkth e
TPM Smalf unction telltale afterrep laci ng
on eor mor etires orwhee lson your vehicle
to ensur eth at therep lace men tor altern ate
ti res and whee lsallow theTPM Sto continue
to fun ction properly.
It is thedriv er'sres pon sibil ity to set thetire
pre ssur eto that rec omm ended forcold tires
whic his suit able fortheoper ating situati on
(Y page 299). Not eth at theco rrec ttire pre s-
sur efor thecur ren toper ating situati onmust
fir st be taug ht-in tothetire pre ssur emon itor.
If asubs tantial loss ofpre ssur eoc cur s,the
warn ingthres hold forthewarn ingmes sage is
align edtothetaug ht-in refere ncevalue s.
Rest artthetire pre ssur emon itor afteradj ust -
ing thepre ssur eof theco ld tires
(Y page 304). The curren tpre ssur esare
sav edasnewref ere ncevalue s.As ares ult,a
warn ingmes sage willappear ifth etire pre s-
sur edro pssign ificant ly.
The tire pre ssur emon itor does notwarn youof
an incorrectly set tire pre ssur e.Obs erveth e
no teson therec omm ended tire pre ssur e
(Y page 299).
The tire pre ssur emon itor isno table towarn
you ofasudde nloss ofpre ssur e,e.g. ifth e
ti re ispen etrat ed byafor eign object.In the
eve ntofasudde nloss ofpre ssur e,brin gth e
veh icleto ahalt bybrak ingcareful ly.Avoid
abrup tst eer ing mov eme nts.
The tire pre ssur emon itor has ayellow warning
lamp intheins trumen tclus terfor indicat ing
pre ssur eloss oramalf unction .Whet herthe
warn inglamp flashes orligh tsup indicat es
whet heratire pre ssur eis toolow orthetire
pre ssur emon itor ismalf unction ing :
R ifth ewarn inglamp islit continuo usly, the
ti re pre ssur eon oneor mor etires issign ifi-
can tly to olow. Thetire pre ssur emon itor is
no tmalf unction ing .
R ifth ewarn inglamp flashes forappr ox-
imat elyamin ute and then rem ainslit con- Ti
re pressu re
303Wheels andtire s Z