warning MERCEDES-BENZ SLC 2020 Owners Manual

If
the indicator/wa rninglampsdon otlight up
at low temperature s,itis very likely thatthe
discha rgedbattery hasfrozen. Inthis case,
you may neither chargethebattery norjump-
start thevehicle .The service lifeofat hawed -
out battery maybeshorter. Thestarting char-
acteristics canbeimpa ired, particul arlyatlow
temperature s.Have thethawed -outbattery
checked ataq ualifie dspecia 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 261). Replaci
ngthe 12Vb attery
Observe thenotes onthe 12Vb attery
(Y page 258).
Mercedes-Benz recommendsthatyouhave
the 12Vb attery replacedataq ualifie dspe-
ciali stworkshop, e.g.atan authori zed
Mercedes-Benz Center. If
you want torepla cethe battery yourself,
observe thefollow ingnotes:
R Alway srepla cead efective 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 ofap ositive terminal andaground point. G
WARNING
Battery acidiscaustic. Thereisar isk ofinjury.
Avoid contact withskin, eyesorclothing. Donot inhal eanybattery gases.Don otlea no ver the
battery. Keepchildre nawayfrom 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 leano ver abattery. G
WARNING
During thecharging process,abattery produceshydro gengas. Ifas hort circuit occurs or
sparks arecreated, thehydro gengascan ignite. Thereisar isk ofan explosi on. Jump-st
arting
261Breakd owna ssis tance
Z

R
Make surethatthepositive terminal ofac onn ected battery doesnotcome intocontactwith
vehicle parts.
R Never placemetal object sortools 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
Ad ischarged batterycanfreeze attemperatures belowfreezing point.Whenjump-st artingthe
vehicle orcharging thebattery, gasescanescape fromthebattery. Thereisar isk 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 .Int his case, youmay neither chargethebattery norjump-st artthe
vehicle. Theservice lifeofat hawed-out batterymaybeshorter. Thestartin gcharacterist icscan
be impaired, particularly atlow temperatures. Havethethawed-out batterycheckedataq uali-
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 witha12V voltage 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 pulleyorthe 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). 262
Jump
-startingBr eakdown assistance

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 253).
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 isar isk 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 264). Permit
tedtowing methods
Mercedes- Benzrecomm endstransportin gyour
vehicle inthe case ofab reakdown, 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. Towing
andtow-sta rting
265Breakdown assistance 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 tonthe
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 266). G
WARNING
When thehood isopen andthewindshield
wipers aresetinmotion, youcan beinjured
by the wiper linkage. Thereisar isk ofinjury.
Always switchoffthe windshield wipersand
the ignition beforeopening thehood. X
Make surethatthewindshield wipersare
turned off.
X Open thehood.
X Use adrycloth 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 266). 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. Fuses
267Breakdown assistance Z

R
Do not drive with tire sw hich have too little
trea ddepth.T hiss igni fic antl yreduce sthe
tra ctio nonw etroa ds(hyd rop laning ).
R Re place thetiresafter sixy ears at the lat-
est, regardless ofwe ar. MOE
xtende dtires(tires with run-f lat
prope rties)
Wi th MOExte ndedtires(tires with runf lat
cha racteri stics) ,you can conti nuetodrive your
veh iclee veni fthe re isat ota llos so fpressu re
in one ormor etires.
MOExte ndedtiresm ayonl ybeu sedi nc on-
juncti onwith an acti vetire pressu reloss wa rn-
ing system orwith an acti vetire pressu remon-
ito ra nd onwheelssp eci fically teste dby
Me rced es-Benz.
Note sond rivin gw ithM OExte ndedtiresw itha
fla ttire (Ypage 254 ).
Veh icles equipp ed with MOExte ndedtiresa re
not equipp ed with aT IREFIT kitatthe factory .
It is the refore reco mme ndedthaty ou additio n-
al ly eq uipy ourv ehiclew ithaT IREFIT kitifyo u
mou nttire sthatd on otfea turerun-flat cha rac-
teri stics, e.g.winter tires.AT IREFIT kitcan be
ob tained fromaq ualifi ed speci alistw orksh op. Win
terope ratio n Ge
neral notes
Hav eyourv ehiclew inter-p roofed ataq ualifi ed
sp eci alistw orksh opatthe onse tofw inter.
Ob ser vethe note sint he "Cha ngi ng aw heel"
sec tion(Ypa ge 289 ). Dri
ving with summe rtire s
At temp eratures below4 5‡ (+7†),sum mer
tire slos ee last ici ty and therefore tractio nand
bra king powe r.Ch ang ethe tire sonyourv ehi-
cle toM+S tires.Us ings umme rtires atvery
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 isar isk 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 isar isk 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 lina ddition tothe M+S marking provide
the best possi blegrip inwintry roadcondi-
tions.
Only these tireswillallow drivi ngsafety sys-
tems suchasABS andESP®
to function opti-
mall yinw inter. These tireshave 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 274).
X Vehic lesforCanada: restartthetire pres-
sure losswarni ngsystem (Ypage 275).
X Resta rtthe tire pressu remonitor
(Y page 275).
Information aboutdrivi ng with anemergency
spare wheel(Y page 294). 270
Winter
operationWheelsand tires

Snow
chains G
WARNING
If snow chains areinstalled tothe front
wheels, theymaydrag against thevehicle
body orchassis componen ts.This could
cause damage tothe vehicle orthe tires.
There isar isk ofan accident.
To avoid hazardous situations:
R never install snowchains tothe front
wheels
R alwa ysinstall snowchains inpairs tothe
rear wheels.
For safety reasons, Mercedes-B enzrecom-
mends thatyouonly usesnow chains that
have been specially approved foryour vehicle
by Mercedes-B enz,orare ofac orrespondin g
standard ofquali ty.For more information ,
please contactaquali fied specialist workshop.
If you inten dtom ount snow chains, please
bear thefollowing pointsinmind:
R Snow chains maynotbemounted onall
wheel/tire combinations .Permissible
wheel-tire combinations (Ypage 293).
R Only usesnow chains whendriving onroads
completely coveredbysnow. Remove the
snow chains assoon aspossible whenyou
come toaroad that isnot snow-cov ered.
R Local regulations mayrestrict theuse of
snow chains. Observe theappropriate regu-
lations ifyou wish tomount snowchains.
R Do not exceed themaximum permissible
speed of30 mph (50km/h).
You may wish todeactivate ESP®
when pulling
away withsnow chains installed (Ypage 61).
You canthereby allowthewheels tospin ina
cont rolled manner, achieving anincreased
driving force(cuttin gaction).
Inform ationabout driving withanemergency
spare wheel (Ypage 294). Tire
pressur e Tire
pressur especifications
Import antsafety notes G
WARNING
Underinflated oroverinflated tirespose the
following risks:
R the tires mayburst, especially asthe load
and vehicle speedincrease.
R the tires maywear excessively and/or
unevenly, whichmaygreatly impairtire
tract ion.
R the driving characterist ics,aswell as
steering andbraking, maybegreatly
impaired.
There isar isk ofan accident.
Follow recommen dedtireinflation pressures
and check thepressure ofall the tires
including thespare wheel:
R mont hly,atleast
R ifthe load changes
R before beginning along journey
R under different operating conditions,e.g.
off-r oad driving
If necessary, correctthetire pressure.
The data onthe Tire andLoading Information
placard andtirepressure tableshown hereare
examples. Tirepressure specifications are
vehicle-specific andmay deviate fromthedata
shown here.Thetirepressure specifications
that arevalid foryour vehicle canbefound on
the Tire andLoading Informationplacard and
tire pressure tableonthe vehicle.
General notes The
recommen dedtirepressures forthe tires
mounted atthe factory canbefound onthe
labels described here.
Operat ionwith anemergency sparewheel:
information onoperation withanemergency
spare wheel canbefound inthe general notes
in the "Emergenc yspare wheel" section
(Y page 295).
Further information ontire pressures canbe
obtained ataq uali fied specialist workshop. Tire
pressure
271Wheelsandtires Z

Avoi
dtire pre ssu res thatare too high inall
the tires,incl uding the sparewh eel.
Ove rinflated tiresm ay:
R incr ease the braking dista nce
R ad ver selya ffect handl ing
R we arexce ssivel ya nd/or unevenl y
R ha ve an adver seeffe cton ridec omf ort
R be more susce ptiblet od amage
Maxi mum tirepres sure s 0043
Exam ple: ma ximu mpermi ssi blet ire pre s-
su re
Nev erexce edthe maximu mpermi ssi blet ire
infl ation pre ssu re.Alw ayso bserve the reco m-
mend edtire pressu refor your veh iclew hen
ad jus ting thetire pressu re(Y page 271) .
i The
actu alvalues for tiresareveh icle-sp e-
cifi cand maydeviate from thevalues inthe
il lu stra tion. Che
ckingt he tire pres sure s
Impo rtant safetynotes The
tirepressu remoni tordoes not warnyou
of:
R inco rrectly settire pressu re
R sudd en loss oftire pressu re,e.g.from afor-
ei gn object thathas penetra tedthetire
Obs ervethe notes ontire pressu re
(Y page 271 ). Info
rma tiono nairpre ssu refor the tireson
yo ur veh iclec an be fou nd:
R on the vehicle's Tire and Loading Info rma -
tio np laca rd on the B-pi llar
R on the tire pressu retab lein the fuel filler
fla p
R in the "Tire pre ssu re" section
Che ckingt ire pres sure smanua lly To
determ ineand setthe corr ecttire pressu re,
pro cee dasfollows :
X Re move thevalve cap ofthe tire thatist o
be che cked .
X Pre ssthe tire pressu regaug es ecurelyo nto
the valve .
X Re ad the tire pressu reand comp arei ttot he
reco mme ndedvalue on the Tire and Loading
Info rma tionp laca rd orthe tire pressu re
tab le(Y page 271 ).
X Ifthe tire pressu reistoo low, incr ease the
tire pressu reto the reco mme ndedvalue.
X Ifthe tire pressu reistoo high, release air.
To do so, pressdown the meta lpininthe
va lve ,using the tipofap en for exa mpl e.
The ncheck the tire pressu reagainu sing the
tire pressu reche cker.
X Screw thevalve cap onto thevalve .
X Re peat thes estep sfor the othe rtire s. Tire
pres sure loss wa rning sys tem
(C anada only)
Ge neral notes Whi
lethe vehiclei sinm otion, the tire pres-
su re loss wa rning system monitorsthesettire
pre ssu reusing the rota tional speedofthe
wh eels.T hise nables the system todetect sig-
nifi cant pressu reloss inat ire.Ift he spe edof
rota tiono fa wheelcha nge sasa resulto fa
lo ss ofpre ssu re,acorresp ond ingwarning
mes sage willap pe ar inthe multifu nctio ndis-
pl ay .
Yo uc an reco gnizethe tire pressu reloss wa rn-
ing bythe Run FlatIndica tor Active Run
FlatIndica tor Active
Pre ss 'OK'toR estar t Pre
ss 'OK'toR estar tmes sage which
ap pe arsi nt he Ser v. Ser
v.menu ofthe multifu nc-
tio nd ispl ay .Info rma tiono nthe mes sage dis-
pl ay can befou ndinthe "Resta rting thetire 27
4 Tire
pres sureWhe elsa nd tire s

pressure
losswarning system" section
(Y page 275).
Impor tantsafet ynotes The
tirepressure warningsystemdoesnot
warn youofan inco rrectlyset tire pressure.
Observe thenoteson the recom mended tire
pressure (Ypage 271).
The tirepressure losswarning doesnot
replace theneed toregularly checkthe tire
pressure. Aneven lossofpressure onseveral
tires atthe same timecannotbe detec tedby
the tire pressure losswarning system.
The tirepressure monitorisnot able towarn
you ofas udden lossofpressure, e.g.ifthe
tire ispenet rated byaforeign object.In the
event ofas udden lossofpressure, bringthe
vehicle toah alt bybrakin gcarefully. Avoid
abrupt steeringmoveme nts.
The func tion ofthe tire pressure losswarning
system islimited ordelayed if:
R snow chains aremount edon your vehicle's
tires.
R road condition sarewintr y.
R you aredriving onsand orgravel.
R you adopt avery sport ydriving style(corner-
ing athigh speeds ordriving withhigh rates
of accelerat ion).
R you drive withaheavy load.
Resta rting the tirep ressure losswarn-
ing system Restart
thetire pressure losswarning system
if you have:
R chang edthe tire pressure
R chang edthe wheels ortires
R mount ednew wheels ortires
X Befor erest artin g,make surethatthetire
pressures aresetproperly onallfour tires
for the respect iveoperatin gcondition s.
The recom mended tirepressure canbe
found onthe Tire andLoading Informat ion
placard onthe B-pillar .Addit ionally, atire
pressure tableisattac hedtothe fuel filler
flap. Thetirepressure losswarning system
can only givereliable warningsify ou have
set the corr ecttire pressure. Ifan incorrec ttire
pressure isset, these incorrectvalues
will bemonit ored.
X Also observe thenotesinthe sect ionontire
pressures (Ypage 271).
X Make surethattheSmart Keyisin position
0048 inthe ignit ionlock (Ypage 118).
X Press the0059 or0065 buttononthe steer -
ing wheel toselect theServ. Serv.
menu.
X Press the0063 or0064 buttontos elect
Tire Pressu re Tire
Pressu re.
X Press the0076 button.
The Run Flat Indica torActive Press Run
Flat Indica torActive Press
'OK' toRestar t 'OK'
toRestar tmessage appearsinthe
multifun ction display.
If you wish toconfirm therest art:
X Press the0076 button.
The Tire Pressu reNow OK? Tire
Pressu reNow OK?message
appears inthe multifun ction display.
X Press the0063 or0064 buttontos elect
Yes Yes.
X Press the0076 button.
The Run Flat Indica torRestar ted Run
Flat Indica torRestar tedmes-
sage appears inthe multifun ction display.
Aft erateach -inperiod, thetire pressure
loss warning systemwillmonit orthe settire
pressures ofall four tires.
If you wish tocancel therest art:
X Press the0038 button.
or X Ifthe Tire Pressu reNow OK? Tire
Pressu reNow OK?message
appears, usethe0063 or0064 buttonto
select Cancel Cancel
.
X Press the0076 button.
The tirepressure valuesstoredatthe last
rest artwill continue tobe monit ored. Tir
ep ressure monitor
General notes If
at ire pressure monitorisinst alled, thevehi-
cle's wheels havesensor sthat monit orthe tire
pressures inall four tires. Thetirepressure
monit orwarns youifthe pressure dropsinone
or more ofthe tires. Thetirepressure monitor
only functionsifthe corr espondin gsensor s
are installed inall wheels.
Inf ormat ionontire pressures isdisplayed in
the multifun ction display. Afterafew minut es
of driving ,the curren ttire pressure ofeach tire Tir
ep ressure
275Wheels andtires Z

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

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