2019 MERCEDES-BENZ CLA COUPE spare tire

Information
ontire pressu resisdispl ayedin the
multifu nctiondisplay.After afew minutes of
driving, thecurrent tirepressu reofeach tireis
shown inthe Serv. Serv.
menuofthe multifu nction
displ ay,see illustration (example). For
information onthe message display,refer to
the "Checking thetire pressu reelectronical ly"
section (Ypage 299).
Important safetynotes G
WARNING
Each tire,includi ngthe spare (ifprovide d),
shoul dbe checked atlea stonce every two
weeks whencoldandinflated tothe pressu re
recommended bythe vehicle manufacture r
on the Tire andLoadi ngInformation placard
on the driver's doorB-pilla ror the tire pres-
sure labelon the inside ofthe fuel fillerflap. If
you rvehicle hastires ofadifferent sizethan
the size indicated onthe Tire andLoadi ng
Information placard or,ifavai lable,the tire
pressu relab el,you shoul ddetermine the
proper tirepressu refor those tires.
As anadde dsafety feature, yourvehicle has
been equipped withatire pressu remonitoring
system (TPMS)thatilluminates alow tirepres-
sure telltal ewhen oneormore ofyou rtires
are significa ntlyunderinfla ted.Accordingly,
when thelow tirepressu retelltal elights up,
you shoul dstop andcheck yourtires assoon
as possib le,and inflate themtothe proper
pressu re.Driving onasignifica ntlyunderin-
flated tirecause sthe tire tooverhea tand can
lea dto tire failure.
Underinfla tionalso reduces fuelefficiency
and tiretread life,and may affect thevehicle 's
handli ngand stopping ability. Plea senote that
the TPMS isnot asubstitu tefor proper tire
maintenance, anditis the driver's responsi-
bili tyto maintain correcttirepressu re,even if underinfla
tionhasnotreached thelevel to
trigger illuminatio nof the TPMS lowtirepres-
sure telltal e.
Your vehicle hasalso been equipped witha
TPMS malfunction indicator toindicate when
the system isnot opera tingproperl y.The
TPMS malfunction indicator iscombined with
the low tirepressu retelltal e.When thesys-
tem detects amalfu nction, thewarning lamp
wil lflash forappro ximately aminute andthen
remain continuously illuminated .This
sequ ence willbe repea tedevery timethevehi-
cle isstarted aslong asthe malfu nction
exists. Whenthemalfu nction indicator isillu-
minated, thesystem maynotbeabl eto detect
or signal lowtirepressu reas intended.
TPMS malfunctions mayoccur foravariety of
reasons, includingthe installa tionofincom-
patibl erepla cement oralternate tiresor
wheel son the vehicle thatprevent theTPMS
from functioning properly.Alway scheck the
TPMS malfunction telltaleafter replacingone
or more tiresorwheel son you rvehicle to
ensure thattherepla cement oralternate Tires
and wheel sall ow the TPMS tocontinue to
function properly.
It is the driver's responsib ility to set the tire
pressu reto that recommended forcold tires
which issuita bleforthe opera tingsitua tion
(Y page 293). Notethatthecorrect tirepressu re
for the current operatingsitua tionmust firstbe
taught-in tothe tire pressu remonitor. Ifasub-
stantial lossofpressu reoccurs, thewarning
threshold forthe warning messageis ali gned to
the taught-in reference values.Restart thetire
pressu remonitor afteradjusting thepressu reof
the cold tires (Ypage 300). Thecurrent pres-
sures aresaved asnew reference values.Asa
resul t,awarning messagewil lappe arifthe tire
pressu redrops significa ntly.
The tirepressu remonitor doesnotwarn youof
an incorrectly settire pressu re.Observe the
notes onthe recommended tirepressu re
(Y page 293).
The tirepressu remonitor isnot ableto warn you
of asudd enloss ofpressu re,e.g. ifthe tire is
penetrated byaforeign object.Inthe event ofa
sudd enloss ofpressu re,bring thevehicle toa 298
Tire
pressureWheel sand tires

halt
bybraking carefully. Avoidabrupt steering
movement s.
The tirepressure monitorhasayellow warning
lamp inthe instrumen tcluster forindicating
pressure lossoramalfunction. Whetherthe
warning lampflashes orlights upindicates
whether atire pressure istoo low orthe tire
pressure monitorismalfunctionin g:
R ifthe warning lampislit cont inuously ,the tire
pressure onone ormore tiresissignificantly
too low. Thetirepressure monitorisnot mal-
funct ioning.
R ifthe warning lampflashes foraround a
minute andthen remains litconst antly, the
tire pressure monitorismalfunctionin g.
In addition tothe warning lamp,amessage
appea rsinthe multifunction display.Observe
the information ondisplay messages
(Y page 213).
It may take uptoten minutes foramalfunction
of the tire pressure monitortobe indicated. A
malfunction willbeindicated bythe tire pres-
sure warning lampflashing forapproximately
one minute andthen remaining lit.When the
malfunction hasbeen rectified, thetire pressure
warning lampgoesoutafter afew minutes of
driving.
The tirepressure valuesindicated bythe on-
board computer maydiffer fromthose meas-
ured atagas station withapressure gauge.The
tire pressures shownbythe on-board computer
refer tothose measured atsea level. Athigh
altitudes, thetire pressure valuesindicated bya
pressure gaugearehigher thanthose shown by
the on-board computer. Inthis case, donot
reduce thetire pressures.
The operation ofthe tire pressure monitorcan
be affected byinterfer encefromradio transmit -
ting equipment (e.g.radio headphones, two-way
radios) thatmay bebeing operated inor near the
vehicle.
Checking thetire pressur eelec troni-
cally X
Make surethattheSmartKey isin position 0048
in the ignition lock(Ypage 123).
X Press 0059or0065 onthe steering wheelto
select theServ. Serv.
menu. X
Press the0063 or0064 button toselect
Tire Pressure Tire
Pressure.
X Press the0076 button.
The current tirepressure ofeach tireisshown
in the multifunction display.
If the vehicle wasparked forlonger than
20 minutes, theTire pressure willbe Tire
pressure willbe
displayed afterdriving afew minutes displayed
afterdriving afew minutes
message isshown.
Aft erateach-in process, thetire pressure mon-
itor automatically detectsnewwheels ornew
sensors. Aslong asaclear allocation ofthe tire
pressure valuetothe individua lwheels isnot
possible, theTire Tire
Pressure Pressure
Monitor Monitor
Active Active
message isshown instead ofthe tire pressure
display .The tirepressures arealready being
monitored.
If an emergency sparewheel ismounted, the
system maycontinue toshow thetire pressure
of the wheel thathasbeen removed forafew
minutes. Ifthis occurs, notethatthevalue dis-
play edfor the position wherethespare wheel is
fitted isnot thesame asthe current tirepres-
sure ofthe emergency sparewheel.
Tire pressur emonitor warning mes-
sages If
the tire pressure monitordetectsapressure
loss inone ormore tires,awarning message is
shown inthe multifunction display.The yellow
tire pressure warninglampthenlights up.
R Ifthe Please Correct TirePressure Please
Correct TirePressure
message appearsinthe multifunction display,
the tire pressure inat least onetireistoo low.
The tirepressure mustbecorrect edwhen the
opportunity arises.
R Ifthe Check TirePressure Check
TirePressure message
appea rsinthe multifunction display,the tire
pressure inone ormore tireshasdropped
significantly. Thetires must becheck ed.
R Ifthe Tire Tire
Pressure Pressure
Warning Warning
Tire Tire
Fail‐ Fail‐
ure ure
message appears,the tire pressure inone
or more tireshasdropped suddenly. Thetires
must becheck ed.
Observe theinstruct ionsandsafety notesinthe
display messages inthe "Tires" section
(Y page 213).
If the wheel positions onthe vehicle arerotated,
the tire pressures maybedisplay edfor the
wrong positions forashort time.Thisisrectified
after afew minutes ofdriving, andthetire pres-
sures aredisplay edfor the correct positions. Tire
pressure
299Wheelsandtires Z

Uniform
TireQualit yGra ding Standar ds
A unifor mstan dard tograde thequality oftires
with regards totread quality, tiretraction and
tempe rature charac teristics.The quality grad-
ing assessmen tis made bythe manufac turer
following specificationsfrom theU.S.govern -
ment .The ratin gsare molded intothe sidewall of
the tire.
Recomm endedtirepr essures
The recom mended tirepressure appliestothe
tires mount edatthe factory.
The Tire andLoading Informat ionplacard con-
tains therecom mended tirepressures forcold
tires onafully loaded vehicle andforthe maxi-
mum permissible vehiclespeed.
The tirepressure tablecontains therecom men-
ded pressures forcold tires forvarious operat-
ing con dition s,i.e. differin gload andspeed con-
dition s.
Increased vehicleweightduetooptiona l
equip ment
The combin edweight ofall stan dard and
option alequipment availableforthe vehicle,
regardless ofwhether itis actually installed on
the vehicle ornot .
Rim
This isthe part ofthe wheel onwhich thetire is
mount ed.
GAWR (Gross AxleWeight Rating)
The GAWR isthe maximum grossaxleweight
ratin g.The actual loadonanaxle must never
exc eed thegross axleweight rating.The gross
axle weight ratingcan befound onthe vehicle
ident ificationplate onthe B-pillar onthe driver' s
side.
Speed rating
The speed ratingis part ofthe tire ident ification.
It specifies thespeed rangeforwhich thetire is
approved.
GVW (Gross Vehicle Weight)
The gross vehicle weightincludes theweight of
the vehicle includin gfuel, tools, thespare wheel,
access oriesinstalled, occupants, luggage and
the drawbar noseweight ,if applicable. Thegross
vehicle weightmustnotexceed thegross vehi-
cle weight ratingGVWR asspecified onthe vehi-
cle ident ificationplate onthe B-pillar onthe
driver' sside. GVW
R(Gross Vehicle WeightRating)
The GVWR isthe maximum permissible gross
weight ofafully loaded vehicle (theweight ofthe
vehicle includin gall acces sories, occupants,
fuel, luggage andthedrawbar noseweight ,if
applicable). Thegross vehicle weightratingis
specified onthe vehicle identificationplate on
the B-pillar onthe driver' sside.
Maxim umloaded vehicle weight
The maximum weightisthe sum of:
R the curb weight ofthe vehicle
R the weight ofthe acces sories
R the load limit
R the weight ofthe factoryinstalled option al
equipment
Kilopascal (kPa)
Metr icunit fortire pressure. 6.9kPa corre-
sponds to1psi. Another unitfortire pressure is
bar. 100 kilopasc als(kPa) arethe equivalent of
1 bar.
Load index
In addition tothe load-bearin gindex ,the load
index mayalsobeimprin tedonthe sidewall of
the tire. This specifies theload-bearin gcapacit y
more precise ly.
Curb weight
The weight ofavehicle withstandard equipment
includin gthe maximum capacityof fuel, oiland
coolant .It also includes theair-c ondit ioningsys-
tem andoption alequipment ifthese areinstal-
led inthe vehicle, butdoes notinclude passen-
gers orluggage.
Maxim umload rating
The maximum tireload isthe maximum permis-
sible weight inkilogram sor lbs forwhich atire is
approved.
Maxim umperm issible tirepr essure
Maximum permissible tirepressure forone tire.
Maxim umload onone tire
Maximum loadonone tire. This iscalculated by
dividing themaximum axleload ofone axle by
two. All
about wheels andtires
309Wheels andtires Z

bolts
tocome loose. Asaresult, youcould
lose awheel whiledriving .There isarisk of
acciden t.
Never oilorgrease wheelbolts.Inthe event of
damage tothe threads, contact aqualified
specialist workshopimmediately. Havethe
damaged wheelboltsorhub threads
replaced/r enewed.Donot continue driving . G
WARN
ING
If you tight enthe wheel boltsorwheel nuts
when thevehicle israised, thejack could tip
over. There isarisk ofinjury.
Only tightenthe wheel boltsorwheel nuts
when thevehicle ison the ground.
Always payattention tothe instruct ions and
safety notesinthe "Changing awheel" section
(Y page 310).
Only usewheel boltsthathave been designed
for the wheel andthevehicle. Forsafety rea-
sons, Mercedes -Benzrecom mends thatyou
only usewheel boltswhich havebeen approved
for Mercedes -Benzvehicles andtherespect ive
wheel.
! To
preven tdamage tothe paintwor k,hold
the wheel securely againstthewheel hub
while screwin gin the first wheel bolt. X
Clean thewheel andwheel hubcontact sur-
faces.
X Place thenew wheel onthe wheel huband
push iton.
X Tighten thewheel boltsuntiltheyarefinger -
tight . Lowering
thevehicle G
WARN
ING
The wheels couldworkloose ifthe wheel nuts
and bolts arenot tight ened tothe specified
tight eningtorque. Thereisarisk ofacciden t.
Have thetight eningtorque immediately
chec kedataqualified specialist workshop
after awheel ischang ed.
X Place theratc hetwrenc hont othe hexagon
nut ofthe jack sothat theletters ABare visi-
ble.
X Turn theratc hetwrenc huntil thevehicle is
onc eagain standing firmly onthe ground.
X Place thejack toone side. X
Tighten thewheel boltsevenly inacros swise
patte rninthe sequence indicated(0043 to0083).
The specified tighteningtorque is96 lb-ft
(130 Nm).
X Turn thejack back toits initial position .
X Stow the jack andtherest ofthe vehicle tools
in the vehicle again.
X Mercedes-
AMGvehicles andvehicles
with AMG Line: usethecover ofthe outer sill.
X Check thetire pressure ofthe newly mount ed
wheel andadjust itifnec essary.
Observe therecom mended tirepressure
(Y page 293).
Canad aonly: aslong asyou aredriving withthe
emergen cyspare wheel mounted,the tire pres-
sure losswarning systemcannotfunc tion relia-
bly. Only restartthe tire pressure losswarning
system whenthedefect ivewheel hasbeen
replaced withanew wheel.
Vehicles withtirepr essure monitor (USA
only): allmount edwheels mustbeequipped
with functioningsensor s. 314
Changing
awheelWheels andtires

Whee
land tirecombinatio ns Gene
ralnote s
You canaskforinforma tionrega rding permi tted
whee l/tire combina tionsatan authorized
Merced es-Benz Center.
You shou ldregu larlycheck thepress ureofthe
emerge ncysparewhe el,parti cularlyprio rto
long trips, andcorrect thepress ureasneces-
sary (Ypag e293). Thevalueon the whe elis
vali d.
! For
safe tyreas ons, Merced es-Benz recom-
mends thatyouonly usetires andwheels
whi chhave been approved byMerced es-Benz
speci ficallyfor you rvehicl e.
These tireshave been speciallyada pted for
use with thecontrol systems,such asABS or
ESP ®
,and aremarked asfoll ows:
R MO =Merced es-Benz Original
R MOE =Merced es-Benz OriginalExtended
(tires featuringrun-fla tchara cteristics)
R MO1 =Merced es-Benz Original(only cer-
tain AMG tires)
Merced es-Benz OriginalExtended tiresmay
only beuse don whe elsthat have been spe-
cifica llyapp roved byMerced es-Benz.
Only usetires, wheelsoraccesso riestested
and approved byMerced es-Benz. Certain
chara cteristics, e.g.handl ing,vehicl enoise
emiss ionsorfuel consump tion,mayother-
wis ebe adve rsely affected .In add ition, when
drivi ngwith aloa d,tire dime nsion variations
coul dcaus ethe tires tocome intocontact
with thebody work andaxle components. This
coul dresu ltin dama getothe tires orthe vehi-
cle.
Merced es-Benz accepts noliabil ity for dam-
age resu lting from theuse oftires, wheelsor
accesso riesother thanthose tested and
app roved.
Informatio non tires, wheelsand approved
combina tionscanbeobtai nedfrom anyquali-
fied speci alist worksho p.
! Retrea
dedtires areneither testednorrec-
ommende dby Merced es-Benz, sinceprevi-
ous dama gecannot alwaysbe detected on
retread edtires. Asaresu lt,Merced es-Benz
cannot guarantee vehiclesafe tyifretread ed
tires aremounted .Do not mount usedtires if
you have noinforma tionabouttheir previous
usa ge. The
recommende dpress uresforvari ous oper-
ating conditio nscan befound:
R on the Tire andLoad ingInformatio npla card
on the B-pill aron the drive r'sside
R in the tire press uretablein the fuel filler flap
Obser vethe notes onrecommende dtire pres-
sure sunder various opera tingconditio ns
(Y pag e293) .
Che cktire press uresregularly,and only when
the tires arecold. Comp lywith themaintenance
recommenda tionsofthe tire manufa cturerin
the vehicl edocu ment wallet.
Notes onthe vehicl eequ ipme nt–alw aysequ ip
the vehicl e:
R with tires ofthe same sizeonagive naxle (left
and right)
R with thesame typeoftire (summer tires,
MOExtended tires,winter tires)
Exception: itis permi ssibleto instal la diffe r-
ent type ormake inthe event ofaflat tire.
Obser vethe "MOExtended tires(tires with
run-fla tchara cteristics" section(Ypag e275) .
Vehi cles equipped with MOExtended tiresare
not equippedwith aTIREFIT kitatthe factory .It
is therefore recommende dthat youadditiona lly
equ ipyou rvehicl ewith aTIREFIT kitifyou mount
tires thatdonot featu rerun-fla tprope rties,e.g.
winter tires.ATIREFIT kitmay beobtai nedfrom
a qua lified speci alist worksho p. Emerge
ncyspare wheel Important
safetynotes G
WARNING
The whe elor tire size aswel las the tire type of
the sparewhe elor emerge ncysparewhe el
and thewhe elto be repl aced maydiffer.
Mou nting anemerge ncysparewhe elmay
severe lyimpa irthe drivi ngchara cteristics.
There isarisk ofan accid ent.
To avoi dhaza rdoussitua tions:
R ada ptyou rdrivi ngstyle accordi nglyand
drive carefu lly.
R never mount morethanonesparewhe elor
emerge ncysparewhe elthat differsinsize.
R only useaspa rewhe elor emerge ncyspare
whe elof adiffe rent sizebriefly. Emerge
ncyspare wheel
315Whee lsand tires
Z

R
do not switch ESP®
off.
R have aspare wheel oremergen cyspare
wheel ofadifferen tsize replaced atthe
nearest qualified specialist workshop.
Observe thatthewheel andtiredimension s
as well asthe tire type must becorr ect.
When usinganemergen cyspare wheel orspare
wheel ofadifferen tsize, youmust notexceed
the vehicle's maximum designspeedof50 mph
(8 0km/ h).
You should regularly checkthe press ureofthe
emerg encyspare wheel, particularly priorto
long trips, and correctthe press ureasnec es-
sary (Ypage 293). Thevalue onthe wheel is
valid.
Sn ow chain smust notbemoun tedonemer-
genc yspare wheels. Genera
lnotes
You canaskforinformat ionregard ingpermit ted
emerg encyspare wheels atan author ized
Merc edes- BenzCent er.
An emerg encyspare wheel mayalsobemoun -
ted against thedirec tionofrot ation .Obser ve
the timerest riction onuse aswell asthe speed
limit ation specif iedonthe emerg encyspare
wheel.
Replace thetires afte rsix years atthe latest ,
regard lessofwear. Thisalso applies tothe
emerg encyspare wheel.
Tir epr essur eloss warn ingsyst em(Canad a
only): aslong asyou aredrivin gwith theemer-
genc yspare wheel mounted,thetirepress ure
loss warnin gsyste mcan not func tion reliably.
Only restartthe tirepress ureloss warnin gsys-
tem when thedefec tivewheel hasbeen
replace dwith anew wheel.
Vehicles withtirepr essur emonit or(USA
only): afteran emerg encyspare wheel hasbeen
moun ted,thesyste mmay stilldisplay thetire
press ureofthe remo vedwheel forafew
minut es.The value displayed forthe moun ted
emerg encyspare wheel isnot thesame asthe
curr enttirepress ureofthe emerg encyspare
wheel. Rem
oving theemer gency sparewheel Vehic
leswith the"Minisp are"emerg encyspare
wheel
The "Minispar e"emerg encyspare wheel is
secur edinemerg encyspare wheel bag0043inthe
tr unk .
X Open thetrunk lid
X Release securingstraps 0044onemerg ency
spare wheel bag0043.
X Remove emergencyspare wheel bag0043with
the "Minispar e"emerg encyspare wheel.
X Open emerg encyspare wheel bag0043and
remo vethe "Minispar e"emerg encyspare
wheel.
Obser vethe instruct ions andsafet ynot esinthe
"Changin gawheel" section(Ypage 311). 316
Emer
gency sparewheelWheels andtires