run flat MERCEDES-BENZ GLA 2020 User Guide

Underinflated
tiresmay:
R overheat, leadingtotire defects
R adversely affecthandling
R wear excessively and/orunevenly
R have anadverse effectonfuel consumption
Overinflated tires G
WARNING
Tires withexcessively highpressure can
burst because theyaredamage dmore eas-
ily by road debris, potholes etc.Inaddition,
they alsosuffer fromirregula rwear, which
can severely impairthebraking properties
and thedriving characteristics. Thereisa
risk ofan accident.
Avoid tirepressures thataretoo high inall
the tires, including thespare wheel.
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 308).
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 308).
Information onair pressure forthe tires on
your vehicle canbefound:
R on the vehicle's TireandLoading Informa-
tion placard onthe B-pillar
R in the tire pressure tableinthe fuel filler flap
(Y page 144)
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 308).
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 losswarning system
(Canada only)
General notes While
thevehicle isin motion, thetire pres-
sure losswarning systemmonitors thesettire
pressure usingtherotational speedofthe
wheels. Thisenables thesystem todetect sig-
nificant pressure lossinatire. Ifthe speed of Tire
pressure
311Wheelsandtires Z

rotation
ofawhee lchanges asaresul tof a
loss ofpressu re,acorrespo ndingwarning
messa gewillapp ear inthe multi function dis-
pla y.
You canrecognize thetire pressu reloss warn-
ing bythe Run Flat Indicato rActive Run
Flat Indicato rActive
Press 'OK'toRestart Press
'OK'toRestart messageinthe mul-
tifunction displayinthe Serv. Serv.
menu. Informa-
tion onthe messa gedisp laycan befound in
the "Restarting thetire pressu reloss warni ng"
section (Ypag e312) .
Important safetynotes The
tirepressu rewarni ngsystem doesnot
warn youofan incorrectly settire pressu re.
Observe thenotes onthe recommended tire
pressu re(Y pag e308) .
The tirepressu reloss warni ngdoes not
repla cethe need toregu larlycheck thetire
pressu re.Aneven lossofpressu reon severa l
tires atthe same timecannot bedetected by
the tire pressu reloss warni ngsystem.
The tirepressu remonitor isnot ableto warn
you ofasudd enloss ofpressu re,e.g. ifthe
tire ispenetrated byaforeig nobject. Inthe
event ofasudd enloss ofpressu re,bring the
vehicl eto ahal tby braking carefully.Avoid
abru ptsteering movements.
The function ofthe tire pressu reloss warni ng
system islimi ted ordela yedif:
R snow chains aremounted onyou rvehicl e's
tires.
R road conditions arewintry.
R you aredrivi ngon sand orgravel .
R you adoptavery sporty drivingstyle (corner-
ing athigh speedsordrivi ngwith high rates
of accele ration).
R you aredrivi ngwith aheavy load(in the
vehicl eor on the roof)
Restarting thetire pressure losswarn-
ing system Resta
rtthe tire pressu reloss warni ngsystem
if you have:
R changed thetire pressu re
R changed thewhee lsor tires
R mounted newwhee lsor tires
X Before restarting, makesurethatthetire
pressu resare setprope rlyon allfour tires
for the respe ctiveopera tingconditions. The
recommended tirepressu recan be
found onthe Tire andLoad ingInformation
pla card onthe B-pill ar.Additio nally,atire
pressu retable isattached tothe fuel filler
flap .The tirepressu reloss warni ngsystem
can only givereliablewarni ngsifyou have
set the correct tirepressu re.Ifan incorrect
tire pressu reisset, these incorrect values
wil lbe monitored.
X Also observe thenotes inthe section ontire
pressu res(Ypag e308) .
X Make surethattheSmartKey isin posi tion
0048 inthe ignitio nlock (Ypag e125).
X Press 0059or0065 onthe steering wheel
to sele ctthe Serv. Serv.
menu.
X Press the0063 or0064 button tosele ct
Tire Pressure Tire
Pressure .
X Press the0076 button.
The Run Flat Indicato rActive Press Run
Flat Indicato rActive Press
'OK' toRestart 'OK'
toRestart messageapp ears inthe
multi function display.
If you wishto con firm therestart:
X Press the0076 button.
The Tire Pressure NowOK? Tire
Pressure NowOK?messa ge
app ears inthe multi function display.
X Press the0063 or0064 button tosele ct
Yes Yes.
X Press the0076 button.
The Run Flat Indicato rRestarte d Run
Flat Indicato rRestarte dmes-
sage appears inthe multi function display.
After ateach-in period,the tire pressu re
loss warni ngsystem willmonitor thesettire
pressu resofall four tires.
If you wishto canc elthe restart:
X Press the0038 button.
or
X Ifthe Tire Pressure NowOK? Tire
Pressure NowOK?messa ge
app ears, press the0063 or0064 button to
sele ctCancel Cancel.
X Press the0076 button.
The tirepressu revalu esstored atthe last
restart willcontinue tobe monitored. Tire
pressure monitor(Can adaonly)
Gene ralnotes If
atire pressu remonitor isinstall ed,the vehi-
cle's whee lshave sensors thatmonitor thetire
pressu resinall four tires. Thetirepressu re 312
Tire
pressureWhee lsand tires

pounds
persquare inch(psi), inkilopascal
(kPa) orinbar. Thetirepressure shouldonly
be corr ectedwhen thetires arecold.
Cold tirepr essure
The tires arecold:
R ifthe vehicle hasbeen parked withthetires
out ofdirect sunlight foratleast three hours
and
R ifthe vehicle hasnotbeen driven further
than 1mile (1.6km)
Tr ead
The part ofthe tire that comes intocon tact
with theroad.
Bead The tirebead ensures thatthetire sits
securely onthe wheel. Thereareseveral steel
wires inthe bead topreven tthe tire from com-
ing loose fromthewheel rim.
Sidewall The part ofthe tire between thetread andthe
bead.
Weight ofoptiona lextr as
The combin edweight ofthose option alext ras
that weigh morethanthereplaced standard
parts andmore than2.3kg(5lbs). These
option alext ras, such ashigh-per formance
brakes, levelcontrol, aroof rack orahigh-per -
form ance battery,are not included inthe curb
weight andtheweight ofthe access ories.
TIN (Tire Identificat ionNum ber)
This isaunique identifierwhich canbeused
by atire manufact urertoident ifytires, for
example foraproduct recall,andthus ident ify
the purchasers .The TINismade upofthe
manufact urer'sidentitycode, tiresize, tire
type code andthemanufac turingdate.
Load bearing index
The load bearing index(alsoloadindex )is a
code thatcontains themaximum loadbearing
capacit yof atire.
Tr action
Tract ionisthe result offric tion between the
tires andtheroad surface. Tr
eadwear indicators
Narrow bars(tread wearbars) thataredistrib-
uted overthetire tread. Ifthe tire tread islevel
with thebars, thewear limitof00CD in(1.6 mm)
has been reached.
Occupant distribut ion
The distribut ionofocc upants inavehicle at
their designat edseatin gposition s.
Tota lload limit
Nomin alload andluggage loadplus68kg
(150 lbs)multiplied bythe number ofseats in
the vehicle. Changing
awheel Flat
tire
The "Breakdown assistance"sect ion
(Y page 288)con tains information andnotes
on how todeal with aflat tire. Informat ionon
driving withMOEx tended tires inthe event ofa
flat tire can befound under "MOEx tended tires
(tires withrun-flatcharact eristics"
(Y page 289). Rota
tingthewheels G
WARN
ING
Rotatin gthe fron tand rear wheels ifthe
wheels ortires have differen tdimension s
may severely impairthedriving charact eris-
tics .The servic ebrake orwheel suspension
compon entsmay alsobedamaged. Thereis
a risk ofan acciden t.
Rotate frontand rear wheels onlyifthe
wheels andtires areofthe same dimen-
sions.
! On
vehicles equipped withatire pressure
monit or,elect ronic compon entsare located
in the wheel.
Tire-m ountin gtools should notbeused near
the valve. Thiscould damage theelect ronic
compon ents.
Only have tireschang edataqualified spe-
cialist worksh op.
Observe theinstruct ions andsafety notesin
the "Changing awheel" section(Ypage 326). 326
Changing
awheelWheels andtires

which
havebeen approv edbyMerc edes-
Ben zspec ifically foryour vehic le.
These tires have been speciallyadapte dfor
use with thecon trol syst ems, suchasABS
or ESP®
,and aremark edasfollo ws:
R MO =Merc edes- BenzOrig inal
R MOE =Merc edes- BenzOrig inalExten ded
(tir es feat uringrun -flat char acterist ics)
R MO1 =Merc edes- BenzOrig inal(onlycer -
tain AMG tires)
Merc edes- BenzOrig inalExten ded tires may
only beused onwheels that have been spe-
cif ically approv edbyMerc edes- Benz.
On lyuse tires, wheels oracc esso riestested
and approv edbyMerc edes- Benz.Cert ain
char acterist ics,e.g.hand ling,vehic lenois e
emiss ionsorfuel consumpt ion,may other-
wise beadver selyaffected. Inaddit ion,
when drivingwith aload, tiredimen sionvar-
iatio nscould cause thetir es tocom eint o
con tactwith thebodywor kand axle compo-
nen ts.This could result indamage tothe
tir es orthevehic le.
Merc edes- Benzacc eptsno liabilit yfor dam-
age result ingfromtheuse oftires, wheels
or acc esso riesotherthan those tested and
approv ed.
In for mat ionontires, wheels andapprov ed
com binat ionscanbeobt ained fromany
qualified specialist workshop.
! Retr
eaded tires are neither tested nor rec-
omm endedbyMerc edes- Benz,sin ce prev i-
ous damage cannot always bedet ectedon
ret readed tires. Asaresult ,Merc edes- Benz
can not guaran teevehic lesafet yif ret readed
tir es are moun ted.Do not moun tused tires
if you have noinform ation about their prev i-
ous usage.
The recomm endedpres sures forvario usoper -
atin gcon ditions canbefoun d:
R on theTire andLoadin gIn for mat ionplacar d
on theB- pillar onthedriv er's side
R in thetir epres sure table inthefuel filler flap
Obser vethenot eson rec omm endedtirepres -
sures under variousoper atingcon ditions
(Y page 308).
Check tirepres sures regular ly,and only when
th etir es are cold .Comply withthemain te-
nan cerec omm endation sof thetir eman ufac-
tur erinthevehic ledoc umen twallet. Not
eson thevehic leequipme nt–always
equip thevehic le:
R with tires ofthesame sizeon agiven axle
(left andright)
R with thesame typeoftire(summ ertires,
MOE xtend edtires, wint ertires)
Ex cept ion:itis perm issible toins tall adiff er-
ent type ormak ein theeven tof aflat tire.
Obser vethe"MOE xtend edtires (tires with
run -flat char acterist ics"section
(Y page 289).
Vehic lesequipped withMOExtend edtires are
not equipped withaTIRE FITkit atthefac tory.
It is theref orerecomm endedthat you addit ion-
ally equip yourvehic lewith aTIRE FITkitifyou
moun ttir es that do not feature run-flat prope r-
ties ,e.g .wint ertires. ATIRE FITkit may be
obt ained fromaqualified specialist workshop. Emer
gency sparewheel Imp
ortant safety notes G
WAR
NING
The wheel ortiresiz eas well asthetir etype
of thespare wheel oremer gencyspare
wheel andthewheel tobe replac edmay dif-
fer .Moun tingan emer gencyspare wheel
may severelyimpair thedriv ingchar acteris-
tic s.Ther eis arisk ofan acc iden t.
To avoid hazardous situation s:
R adapt yourdrivingstyle acc ordin glyand
driv ecar efully.
R nev ermoun tmor eth an one spare wheel
or emer gencyspare wheel that diff ers in
siz e.
R only useaspare wheel oremer gency
spare wheel ofadiff eren tsiz ebrief ly.
R do not swit chESP®
off .
R have aspare wheel oremer gencyspare
wheel ofadiff eren tsiz ereplac edatthe
near estqualified specialist workshop.
Obser vethat thewheel andtiredimen -
sion sas well asthetir etype must becor -
rec t.
When usinganemer gencyspare wheel or
spare wheel ofadiff eren tsiz e,you must not Emer
gency sparewheel
331Wheels andtires Z