2019 MERCEDES-BENZ CLA COUPE fuel pressure

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

Res
tarting thetire pres sure monitor Whe
nyo ures tart thetire pressu remoni tor,all
exi sting warning messages aredeleted andthe
wa rning lamps goout.The moni toruses the cur-
rentl yset tire pressu res asthe refe rence values
for moni toring. Inmost cases, the tire pressu re
moni torwillau toma tically dete ctthe new refer-
ence valuesafte ryo uha ve cha nged thetire
pre ssu re.How ever,yo ucan also set refe rence
val uesmanu ally as des crib edher e.The tire
pre ssu remoni torthen monitorsthenew tire
pre ssu reval ues.
X Set thetire pressu reto the value reco mmen-
ded forthe corre spondingdriving situation on
the Tire and Loading Inform ation placa rdon
the driver' ssid eB-pi llar (Y page 293 ).
Yo ucan find more tirepressu reval uesfor
var ious ope ratingcondi tions inthe tire pres-
su re tab leinsi dethe fuelfil lerfla p
(Y page 141 ).
X Ma kesure that thetire pressu reiscorre cton
al lfou rwh eel s.
X Ma kesure that theSmar tKeyisin pos ition 0048
in the igniti onlock (Ypage 123).
X Pre ss0059 or0065 onthe stee ring wheel to
sel ect the Serv . Serv
.menu .
X Pre ssthe 0063 or0064 button tosel ect
Tire Pressure Tire
Pressure.
X Pre ssthe 0076 button.
The multifunction displ aysho wsthe curr ent
tire pressu refor each tire orthe Tire pres‐ Tire
pres‐
sure sure
will will
be be
disp layed disp
layedafte r afte
rdriv ing driv
ing
a few minutes a
few minutesmessage.
X Pre ssthe 0064 button.
The multifunction displ aysho wsthe Use Use
Curr entPressuresas New Reference Curr
entPressuresas New Reference
Valu es Valu
esmes sage.
If you wish toconfi rm the restart:
X Pre ssthe 0076 button.
The Tire Tire
Press. Pres
s.Moni tor Moni
torRest arted Rest
artedmes -
sa ge appea rsinthe multifunction displ ay.
After driving forafew minu tes,thesystem
checks whethe rthe curr enttire pressu res are
wi thin thespecified rang e.The new tirepres-
su res are then accepted asrefe rence values
and moni tored .
If you wish tocan celthe restart:
X Pre ssthe 0038 button.
The tirepressu reval uesstore dat the last
res tart willcontinu eto be moni tored . Radio
typeapprov alfor the tire pres -
sure monitor Co
untry Radio
typeapprov alnumb er USA FCC
ID:MRXMW 2433A
FCC ICID:MR XGG4 Thisdev ice
comp lies with part15 ofthe FCC
rul es and with license exempt
RSS stand ardsof Indu stry Can-
ad a.Ope rationissu bject tothe
fol lowi ng condi tions.(1) This
dev icemay notcauseharmfu l
inter ference, and(2)Thisdev ice
mus tacce ptany inter ference
rece ived,incl uding inter ference
that may causeund esired oper-
ati on. Lepre sent apparei lest
confor med'indu strieCa nad a
ap plica bles auxap parei lsrad io
exem ptsdelicence. L'exploita-
tion estauthori seeauxdeu xcon-
di tions suiva ntes. (1).L'a ppare il
ne doitpa spro duire debro uil-
la ge, et(2) L'autisateu rde l'ap-
pa rei ldoi tacce ptertoutbro uil-
la ge rad ioelectri quesu bi,meme
si le bro uillag eest suscep tible
d'e ncomp romettrelefonc-
tionne ment.WARNING :Ch ang es
or mod ificati ons notexpr essively
ap pro ved bythe party respons i-
bl efor comp liance couldvoi dthe
us ers authori tyto ope rate the
equ ipment. Theterm "IC:"bef ore
the radiocerti fication numb er
only signifi esCanad atechni cal
spe cificati ons weremet.
FCC ID:MR XMC34MA4 This
dev icecomp lies with part15 of
the FCC rules and with license
exem ptRSS stand ardsof Indu s-
try Canad a.Ope rationissu bject
to the followi ng condi tions.(1)
Thi sdev icemay notcauseharm-
ful inter ference, and(2)This
dev icemus tacce ptany inter fer-
ence received,incl uding inter fer-
ence thatmay causeund esired
ope ration. Lepre sent apparei l
est confor med'indu strieCa nad a
ap plica bles auxap parei lsrad io
exem ptsdelicense .L'e xploita-
tion estauthori seeauxdeu xcon-
di tions suiva ntes. (1).L'a ppare il 30
0 Tire
press ureWheelsand tires

Count
ry Ra
dio type approval number ne
doit pasprod uiredebrouil -
lage, et(2) L'aut isatuer del'ap-
pareil doitacceptertout brouil -
lage radioe lectrique subi,meme
si le brouil lageestsusc eptible
d'en comprom ettrelefon c-
tio nnemen t.WARN ING:Chang es
or modi ficatio nsnot expressive ly
appro vedbythepart yres pon si-
ble forcom plian cecould voidthe
users authorityto oper atethe
equipm ent.The term"IC: "befo re
th eradio certificat ion num ber
onl ysign ifies Canada technical
spec ificatio nswere met. Canada IC:
2546A-MW2 433A
IC: 2546A-GG4 Thisdevic ecom -
plies withpart15oftheFCC
rules andwith licenseexe mpt
RSS standar dsofIndust ryCan-
ada. Oper ationis subj ecttothe
follo wing condition s.(1) This
devic emay notcause harmful
int erf eren ce,and (2)This devic e
must accept any interf eren ce
rec eived ,inc ludin gint erf eren ce
th at may cause undesiredoper -
atio n.Le pres entappare ilest
con forme d'indust rieCanada
applic ablesauxappare ilsradio
exe mpt sde lice nse. L'ex ploit a-
tio nest auth oriseeaux deux con-
dit ion ssuivan tes.(1). L'app areil
ne doit pasprod uiredebrouil -
lage, et(2) L'aut isateur del'ap-
pareil doitacceptertout brouil -
lage radioe lectrique subi,meme
si le brouil lageestsusc eptible
d'en comprom ettrelefon c-
tio nnemen t.WARN ING:Chang es
or modi ficatio nsnot expressive ly
appro vedbythepart yres pon si-
ble forcom plian cecould voidthe
users authorityto oper atethe
equipm ent.The term"IC: "befo re
th eradio certificat ion num ber
onl ysign ifies Canada technical
spec ificatio nswere met.
IC: 2546A-MC34 MA4 Load
ingthevehicle Inst
ruction labels fortires and loads G
WAR
NING
Ove rloade dtir es can over heat ,causi nga
blowout .Ove rloade dtir es can also impair the
st eerin gand drivingchar acteris ticsand lead
to brak efailur e.Ther eis arisk ofacc iden t.
Obse rvetheload rating ofthetir es. The load
rat ing must beatleast halfoftheGAWR of
your vehicle.Nev erover load thetir es by
exc eedin gth emax imum load.
Two instruct ion labels onyour vehicle show the
max imum possibleload.
(1) TheTire andLoadin gIn for mat ionplacar dis
on theB- pillar onthedriv er'sside. TheTire
and Loadin gIn for mat ionplacar dshows the
max imum permissiblenum berofocc u-
pant sand themax imum permissibleveh icle
load. Italso contain sdet ails ofthetir esiz es
and correspon ding pressures fortires
moun tedatthefac tory.
(2) Thevehicle iden tificat ion plat eis on theB-
pillar onthedriv er'sside. Thevehicle iden -
tif icat ion plat einf orm syou ofthegro ss
veh icle weight rating .It is made upofthe
veh icle weight ,all veh icle occupant s,the
fuel andthecar go. You canalso findinf or-
mat ionabout themax imum grossaxle
weight rating onthefro ntand rear axle.
The maximum grossaxle weight rating is
th emax imum weight that can becar ried by
one axle (front orrear axle) .Nev erexc eed
th emax imum loadorthemax imum gross
axle weight rating forthefro ntor rear axle. 0043
B-pillar ,driv er'sside Load
ingthevehicle
301Wheels andtires 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