2021 MERCEDES-BENZ METRIS MY21 Operator's Manual

&
WARNING Risk of accident du etotoo
high atirep ressure
Ti re sw ithe xcessively high pressur ecan
bur st.
In addition, they also suf ferf romi rregular
we ar,w hic hc an significantl yimp air theb rak‐
ing properties and theh andling characteris‐
tics. #
Avoid excessively high tir epressures. Excessively high tir
epressur ecan result in:
R Increased braking dis tance
R Impaired handling characteristics
R Irre gular wear
R Impaired drivin gcom fort
R Susceptibility todamage &
WARNING Risk of accident du etorepea‐
te dp ressur edropint he tires
The wheels, valves or tires could be damaged.
To ol ow atirep ressur ecan lead tothet ires
bur sting. #
Examine thet ires forf oreign objects. #
Chec kwhether thet ireh asap uncture
or thev alveh asaleak. #
Ifyo ua reunabl etorectify thed amage,
contact aqualified specialis tworks hop. Yo
uc an find information on recommended tire
pressures fort he vehicle's factor y-ins talled tires
on thef ollowing labels:
R Tire and Loadin gInforma tionp lacar dont he
B‑pi llarofyour vehicle .
R Tire pressur etable on thei nside of thef uel
fi ller flap .
Obse rvet he maximum tir epressure
(/ page213).
Use asuita ble pressur egaug etoc heckthe tire
pressure. The outer appearance of atired oes not
permit an yreliable conclusion about thet ire
pressure.
+ ENVIRONMEN
TALN OTE Environmental
damag eduetoinsuf ficient or excessive
tir ep ressure Insuf
ficient or excessiv etirep ressur eshort‐
ens thes ervice lif eofthe tires. #
Chec kthe tir epressur eregularly ,but at
leas tevery 14 days. Ve
hicles with atirep ressur emonitor: youc an
also checkt he tir epressur eusing theo n-board
computer.
Onl ycorrect tir epressu rewhen thet ires are
cold. Condition sfor cold tires:
R The vehicle has been par kedw itht he tires out
of direct sunlight foratl east thre eh ours.
R The vehicle has tr aveled less than 1m ile
(1.6 km).
Ar ise in thet iret emperatur eof18°F( 10°C)
increases thet irep ressur ebya pprox.10k Pa
(0. 1b ar/1.5 psi). Take this int oaccount when
ch ecking thet irep ressur eofw armt ires.
The tir epressur erecommended fori ncreased
load/spee dinthe tir epressur etable ma yaffect
th er ide comfort. &
WARNING Risk of accident du eto
unsuitable accesso ries on tir evalves
If yo um ountunsuitable accesso ries ont otire
va lves, thet irev alves ma ybeoverloaded and
malfunction ,whic hc an cause tir epressure
loss. #
Onlyscrew standar dvalvec aps or valve
cap sspecifically appr ovedbyM ercedes-
Benz fory our vehicle ont othe tir evalve. Note
sont railer operation
The applicable tir epressur efor thet ires of the
re ar axle is alw ayst he recommended tir epres‐
sur efor afull load. Overvie
wofthe tirepressur etable Wheels and tires
207

Ad
ditionall y,thet irep ressur etable ma yalso
st at et irep ressures ford iffe re nt load conditions.
These ar edefin ed in thet irep ressur einformation
ta ble as dif fere nt number sofpassenger sand
amounts of luggage. The actual number of seats
ma ydiffe r–f or mor einformation, please referto
th ev ehicle's registration documents.
The tir epressur evalues given forp artl yladen
ve hicles ar eminimum values whic hoffer you
good ride comfort. The yarenotfor trailer opera‐
tion.
Yo uc an also use thet irep ressur evalues fora
fully laden vehicle. These ar ealway sa llowe da nd
permissible. Ho wever,in ap artiall yladen vehicle,
th er ide is no tascomfor table and fuel consump‐
tion is onl yminimall yreduced. In addition, wear
is grea terint he middle of thet iret read.
Fo rtrailer operation, thea pplicable value fort he
re ar tires is them aximum tir epressur evalue sta‐
te dint he tir epressur etable inside thef uel filler
fl ap.
Use asuitable pressur egaug etoc heckthe tire
pressure. The outer appearance of atired oes not
permit an yreliable conclusion about thet ire
pressure.
On vehicles ins talled wit hthe electronic tir epres‐
sur em onitor ,the tir epressur ecan be checked
usin gthe on-boar dcomputer.
Se tthe cor rect tir epressur ebefor eloading the
ve hicle. Once thev ehicle is laden, checkt he tire
pressures and cor rect them if necessar y.
Onl ycorrect tir epressur ewhent he tires are
cold. The tires ar ecold under thef ollowing condi‐
tions:
R The vehicle has been par kedw itht he tires out
of direct sunlight foratl east th reeh ours.
R The vehicle has tr aveled less than 1m ile
(1.6 km). Ar
ise in thet iret emperatur eof18°F( 10°C)
increases thet irep ressur ebya pprox.10k Pa
(0. 1b ar/1.5 psi). Take this int oaccount when
ch ecking thet irep ressur eofw armt ires.
Driving wi thtirep ressur ethat is tooh igh or too
lo wc an:
R shor tent he service lif eofthe tires
R cause increased tir edamage
R have an egativ eeffect on handling character‐
istic sand thus drivin gsafet y( e.g. due to
hy droplaning)
Ve hicles with agross vehicl eweight of
6,6 14 lbs (3,000 kg)
The following tir epressur evalues appl ytothefol‐
lowing vehicles:
R With ag ross vehicle weight of 6,6 14lbs
(3,00 0kg)
R With ag ross axle weight rating of 3,3 07lbs
(1,500 kg)o nt he rear axle
R The tires referred tounde r"Whee land tire
combinations "(/pag e221 )
The tir epressur efor thes par ew heel is 350 kPa
(3.5 bar/5 1psi). Pa
rtiall yladen vehicl eF ullyladen vehicle
Ti re s/disc
wheel Fr
ont axle Rear axle Front axle Rear axle
225/55 R17
XL 280 kP
a(2.8
bar/4 1psi) 27
0k Pa(2.7 bar/39
psi) 31
0k Pa(3.1
bar/45 psi) 31
0k Pa(3.1
bar/45 psi) 208
Wheels and tires

Ti
re pressur emonitoring sy stem Fu
nction of thet irep ressur emonitoring sys‐
tem
The sy stem checks thet irep ressur eand thet ire
te mp eratur eofthe tires ins talled on thev ehicle
by means of atirep ressure sensor.
Ne wt irep ressur esensors, e.g. in winter tires,
ar ea utomatically taught-in during thef irst jour‐
ne yt heya reused.
It is thed rive r's responsibility tosetthe tir epres‐
sur etot herecommended cold tir epressur esuit‐
able fort he operating situation (/ page206).
No tethat thec orrect tir epressur efor thec urrent
ope rating situatio nmustfirst be taught-in tothe
tir ep ressur emonitoring sy stem. If asubs tantial
loss of pressur eoccu rs,t he warning thre shold for
th ew arning messag eisaligned tothet aught-in
re fere nce values. Restar tt he tir epressur emoni‐
to ra fter adju sting tothec old tir epressure
(/ page209). The cur rent pressures ar esaved
as ne wreference values. This will ensur ethat a
wa rning messag ewill onl yappear if thet irep res‐
sur edrops significant ly.
The 0077 warning lam pinthe instrument clus ter
displa ysad etected pressur elossoram alfunc‐
tion as follo ws:
R Ifthe 0077 warning lam pislit continuousl y,
th et irep ressur eono ne or mor etires is sig‐
nificantly tool ow .The tir epressur emonitor is
no tm alfunctioning.
R Ifthe 0077 warning lam pflashes fora round a
minut eand then remains lit cons tantl y,the
tir ep ressur emonitorism alfunctioning.
R Am essa gealso appear sinthe instrument
clus ter.
Sy stem limits
The sy stem ma ybeimpaired or ma ynotfunction
in thef ollowing situations:
R The tir epressur ehas been se tincor rectly.
R Thereisas udden pressur eloss caused, for
ex ample, byaforeign object penetratin gthe
tire.
R Ther eisam alfunction caused byano ther
ra dio signal source.
If th et irep ressur emonitor is malfunctioning, it
ma ytakem oret han tenm inutesf or the 0077 tire
pressur ewarning lam ptoinformyou of them al‐
function. When them alfunction has been recti‐ fi
ed, the 0077 warning lam pgoes out af tery ou
ha ve driven foraf ewminutes.
The tir epressur evalue indicated bytheo n-board
computer ma ydiffe rf romt hose measured at a
ga ss tatio nu singap ressur egauge.
The tir epressures shown bytheo n-boar dcom‐
puter refertot hose measured at sea le vel.At
high altitudes, thet irep ressur evalue indicated
by ap ressur egaug earehigher than those shown
by theo n-boar dcomputer .Inthis case, do not
re duce thet irep ressure.
Checking thet irep ressur eelectronically
(onl yvehicles wit hsteering wheel but tons)
Requ irements:
R The ignition is switched on. #
Press the0059 or0065 button toselect
Service. #
Press the0076 button. #
Press the0064 or0063 button toselect Tire
Pressure. #
Press the0076 button.
The displa yshows thec urrent tir epressur eof
ea ch wheel.
If th ev ehicle wasp arke df or longer than
20 minutes, theTire pressure will be displayed
after driving afew minutes messageappear sin
th ed ispla y.
Mak esuretoo bservethef ollowing fur ther rela‐
te ds ubject:
R Notesont irep ressur e(/pag e206)
Rest arting thet irep ressur emonitor
Requ irements:
R The ignition is switched on.
R The recommended tir epressu reis cor rectly
se tfor ther espectiv eoperating condition on
eac hoft hefour wheel s(/pag e207). Wheels and tires
209

Ve
hicles with steering-wheel but tons #
Use the0059 or00D0 button toselect
Service. #
Use the0064 or0063 button toselect Tire
Pressure. #
Press the0076 button toconfirm.
The displa yshows thec urrent tir epressures
of ea chwheel or theTire pressure will be dis-
played after driving afew minutes message. #
Press the0064 button.
The Use Current Pressures as New Refer-
ence Values: messageisshown in thed ispla y. #
Toconfir mrestar t:press the0076 button.
The Tire Press. Monitor Restarted messageis
shown in thed ispla y.
Af tery ou ha vedriven foraf ewminutes, the
sy stem checks whe ther thec urrent tir epres‐
su resa rewithin thes pecified range. The new
tir ep ressures ar ethen accep tedasr eference
va lues and monitored. #
Tocancel restar t:press the0038 button.
The tir epressur evalues stored at thel ast
re star tw ill continue tobe monitored.
Ve hicles without steering-wheel but tons
The vehicle mus tbeatastandstill .Use theb ut‐
to ns on thei nstrument clus ter. #
Press the00DC button toselect theTire Pres-
sure menu. #
Press the0078button toconfirm.
The Monitoring Active messageisshown in
th ed ispla y. #
Press the0078button toconfirm.
The TireP ressur eOK?messag eisshown in
th ed ispla y. #
Toconfir mrestar t:press the0074button.
The displa yshows theD ista nce menu.
Af tery ou ha vedriven foraf ewminutes, the
sy stem checks whe ther thec urrent tir epres‐
su resa rewithin thes pecified range. The new
tir ep ressures ar ethen accep tedasr eference
va lues and monitored. #
Tocancel restar t:press the0075button.
The displa yshows the Tire Pressure menu.
The tir epressur evalues stored at thel ast
re star tw ill continue tobe monitored. Ra
dio equipment appr oval of thet irep ressure
monitoring sy stem
Ra dio equipment appr oval numbers Countr
yRadio equipment appr oval
number
Argentina CNC
:H-12336
Model: Schrade rHSW4
Brazil MODELO: GG4
AN
ATEL: 0381-13-8001
Es te equipament ooper aem
caráter secundário, is toé, não
te md ireit oàp roteção cont rain‐
te rferência prejudicial, mesmo de
es tações do mesm otipo enão
pod ecausar inter ferê ncia asiste‐
mas operando em caráter pri‐
mário.
Jordan Kingdom of Jordan Type appr oval
fo rT yreP ressur eSensor and ECU
Manufacturer :Schrader Elect ron‐
ics Ltd.
Model :Mercedes HS Snap in 433
MHz
Ty pe Appr oval Numb er:
TRC/LPD/20 13/48
Ty pe Appr oval Numb er:L PD
Morocco AGREE PARL 'ANR TMAROC
MR79 07ANR T2013
Dat ed'agrement :05/03/20 13
Moldo va 210
Wheels and tires

Count
ry Radio equipment appr oval
number
Philip‐
pines NTC
Ty
pe Appr oved.
No: ESD-13 06995C
Singapo reComplies wit hIDA Standards
DA -103365
Sou th
Africa TA
-20 13/461
United
Arab Emi‐
ra tes
Abu Dhabi
and Dubai TRA
Re
gis tere dN o: ER0 104996/13
Dealer No: DA00470 74/10 Tir
elabeling Overvie
woftirel abeling 1
Unifor mTireQ uality Grading Standards
(/ page211 )
2 DOT(Depa rtment of Transpor tation), (TIN)
Ti re Identification Number (/ page212 )
3 Maximum tir eloa d( /pag e213 )
4 Maximum tirep ressur e(/ page 213)
5 Manu facturer
6 Characteristics of thet ire( /pag e213 ) 7
Tire size designation, load-beari ng capacity,
speed rating and load ind ex (/pag e213 )
8 Tire name
% The da
tashown in thei llustration is sample
data. Information on tir
equality grades Ac
cording tother equirements of theU .S.
Depa rtment of Transpor tation's "Uni form Tire
Quality Grading Standards" tir emanufacturers
mus tgrade their tires using thef ollowing three
per form anc efactors: 1
Tread weargrade
2 Traction grade
3 Temp eratur egrade
% The dat
ashown in thei llustration is sample
data.
% This grading is no
tlegall yprescribed forC an‐
ada,b ut specified in mos tcases anyw ay.
Tr ead weargrade
The tread wear grade is acomparativ egrading
based on tread wear grade testsc onducted
under controlled conditions on aspecified U.S.
Depa rtment of Transpor tatio nt esttrack .F or
ex ample, atireg raded 150w ould wear one and
one-half times as well on theg ove rnment test
trac kasat ireg rade d1 00.
The relativ eperform anc eoft ires depends upon
th ea ctual conditions of their use, ho wever,and
ma ydepar tsignificantl yfromt he nor mdueto
va riations in drivin ghabits, servic epractices and
dif fere nces in road characteristic sand climate
conditions. Wheel
sand tires 211

Tr
actio ngrade &
DANG ER Risk of acciden tdue toinade‐
qu atet raction
The traction grade assigned tothis tir eis
based on stra ight-ahead brakin gtraction
te sts, and does no tinclude either accelera‐
tion, cornering, hydroplaning or peak traction
ch aracteristics. #
Alwaysa dap tyour driving stylea nd
driv eatas peedtosuit thep reva iling
traf fica nd weather conditions. *
NO
TEDama getothed rive trai nfrom
wheelspin #
Avoid wheelspin. The traction grades
–fromh ighes ttolowest –
ar eA A, A, Band C. These grades relat etot he
tire's ability tocome toas tandstill on awetpave‐
ment under controlle dconditions on aspecified
U. S. go vernment test sur face mad efroma sphalt
and concr ete.
Te mp eratur egrade &
WARNING Risk of accident from tire
ove rheating and tir efailure
The temp eratur egrade fort his tir eisestab‐
lished forat iret hat is properly inflated and
no to verloaded. Excessiv espeed, underinfla‐
tion, or excessiv eloading, either separatel yor
in combination, can cause excessiv eheat
build-up and possible tir efailure. #
Obser vether ecommended tir epres‐
sures and regular lych eckt he tir epres‐
sur eofa ll tires including thes pare
wheel. #
Adjus tthe tir epressur easn ecessar y. The
temp eratur egrades ar eA(highes tgrade), B
and C. These relat etoat ire'sresis tance toheat
and its ability torelease heat on aspecified test
wheel in laborator ytests under cont rolled condi‐
tions. Sus tained high temp eratures can cause the
material of thet iretod egenerat eand reduce tire
life. In addition, excessivel yhigh temp eratures
can lead tosudden tir efailure. Grade Crefer sto
ap erform anc ewhicha ll passenger vehicle tires
mus texhibit, accordin gtotheU.S. Depa rtment
of Transpor tation's requ irements. Information on DO
Tand TIN (Tir eIdentifica‐
tion Number) U.
S. tir eregulations indicat ethat everyt irem an‐
ufacturer or retreade rmustimp rint aT IN in or on
th es ide wall of eac htirep roduced. %
The dat
ashown in thei llustration is sample
data.
The TIN is aunique identification number fort ires
and consists of thef ollowing components:
R DOT(Department of Transportation): tire
symbol 1indicates that thet irec omplies
wit hthe requ irements of theU .S. Depa rtment
of Transpor tation.
R Manufacturer identi fication code: manu‐
fa cturer identification code 2prov ides infor‐
matio nabout thet irem anufacturer .New tires
ha ve ac odew itht wo symbols. Retreaded
tires ha veac odew ithf our symbols.F or fur‐
th er information about retreade dtires, see
(/ page 216).
R Tire size: identifier 3describes thet ires ize.
R Tire type code: tiret ypec ode 4can be
used bythem anufacturer as acode to
describe specific characteristic softhe tire.
R Dat eofm anufactu re:date of manufacture
5 prov ides informatio nabout thea geof a
tire. The 1s tand 2nd number sindicat ethe
calendar week and the3 rdand 4t hnumbers
indicat ethe year of manufactur e(e.g. "3208"
re fers to the3 2ndw eek of they ear 2008). 212
Wheels and tires

Information on maximum tir
eload %
The dat
ashown in thei llustration is sample
data.
Maximum tir eload 1isthem aximum permissi‐
ble weight forw hichthe tir eisa pprove d.
Do no toverload thet ires by ex ceeding them axi‐
mum permissible load. The maximum permissible
load can be found on thev ehicle's Tire and Load‐
ing In form atio nplacar dont he B-pillar on thed riv‐
er's side . Information on maximum tir
epressure %
The dat
ashown in thei llustration is sample
data.
Maximum permitted tir epressure 1mus tnever
be exc eeded. Alw ayso bser vether ecommended
tir ep ressur efor your vehicle when adjusting the
tir ep ressur e(/pag e207). Information on tir
echaracteristics %
The dat
ashown in thei llustration is sample
data.
This information describes thet ype of tir ecord
and then umber of la yers in side wall1 and
under tir etread 2. Ti
re size designation, load-bearing capacity,
speed ratin ga nd load index &
WARNING Risk of inju rythro ugh exceed‐
ing thes pecified tir eload-bearing capa‐
city or thep ermissible speed rating
Exceeding thes pecified tir eload rating or the
permissible speed rating ma ylea dtot ire
dama geand tothet ires bur sting. #
Therefore, onl yuse tir etypes and sizes
appr ovedfor your vehicle model. #
Obser vethet irel oad rating and speed
ra ting requ ired fory our vehicle. 1
Firstletter(s)
2 Nominal tir ewidthinm illimeters
3 Aspect ratio (i npercent)
4 Tire code
5 Rimd iame ter
6 Load-bearing index
7 Load index
8 Speed rating
% The da
tashown in thei llustration is sample
data.
Fu rther information about reading tir edatac an
be obtaine dfroma nyqualified specialis twork‐
shop.
First letter(s) 1 1:
R "LT": light truc ktires in acco rdanc ewithUS
manufacturer standards.
R "C": tires forc ommercial usage in accordance
wit hE uropean manufacturer standards. Wheel
sand tires 213

Aspec
tratio (in percent) 3 3:
The size ratio betwee nthe tir eheight and tire
widt hand is shown in percent (tir eheight divided
by tirew idth ).
Tir ec ode 4
4 (tire type):
R "R": radial tire
Rim diam eter 5 5:
The diame teroft he bead seat (no tthe diame ter
of ther im flange). The rimd iame teriss pecified in
inches (in).
Load-bearing index 6 6:
Nu merical code whic hspecifies them aximum
load-bearing capacity of atire( "91" equals, e.g.
1, 356 lb (6 15kg)).
Th et irel oad-bea ring capacity mu stbe at least
half theg ross axle weight rating of thev ehicle.
Do no toverload thet ires by ex ceeding them axi‐
mum permissible load.
See also:
R Maximum permissible load on theT irea nd
Loading In form atio nplacard
R Maximum tir eload (/ page213 )
R Load index
Spee drating 8 8:
Specifies thea ppr ove dm aximum speed of the
tire.
% An electroni
cspeed limiter pr events your
ve hicle from exceeding aspeed of 130m ph
(2 10 km/h).
Ensu rethat your tires ha vether equired speed
ra ting .You can obtain information on the
re qu ired speed rating at aMercedes-Benz Com‐
mercial VanC enter.
Summe rtires Inde
xS peedrating
LU pto75mph (120 km/h)
MU pto81mph (130 km/h)
NU pto87mph (140 km/h)
PU pto93mph (150 km/h)
QU pto100mph(160k m/h)
RU pto106mph(170k m/h) Summer
,all-season and winter tires Inde
xS peedrating
LM +S1
Upto75 mph(120k m/h)
MM +S1
Upto81 mp h(130k m/h)
NM +S1
Upto87 mph(140k m/h)
PM +S1
Upto93 mph(150k m/h)
QM +S1
Upto100m ph (160 km/h)
RM +S1
Upto118m ph (170 km/h) 1
:or" M+S 004D"f or winter tires.
Wi nter tires ar emarke dw itht he 004D snowflake
symbol and fulfill ther equirements of theR ubber
Manufacturer sAssociation (RMA) and theR ubber
Associatio nofCanada (RAC) rega rding thet ire
traction on sno w.
Load index 7 7:
R "Light load": light load tire
R "C": commercial tires Information on definitions (tires and load‐
ing)
Ti re stru ctu reand characteristics: describes
th en umber of la yers or then umber of rubber-
coated la yers inthet iret read and thet irew all.
These ar emade of steel, nylon, pol yester and
ot her materials.
Bar: metric unit fort irep ressu re.
14 .5038 pounds per squar einc h( psi) and
10 0k ilopascals (kPa) ar ethe equivalent of 1bar.
DO T(Department of Transportation): DOT
mar kedt ires fulfill ther equirements of the
U. S. Depa rtment of Transpor tatio n.
Av erag eweight of vehicl eoccupants: the
number of occupants forw hichthe vehicle is
designed multiplied by150lbs (68 kg).
Un ifor mT ireQ uality Grading Standards: auni‐
fo rm standar dtog rade theq uality of tires with
re ga rdstot read quality ,tiret raction and temp er‐
atur echaracteristics. The quality grading assess‐
men tism adebythem anufacturer in accordance
wit htests pecifications of theU .S. go vernment.
The quality grade of atireisi mprinted on the
side wall of thet ire.
Re commended tir epressu re:ther ecommen‐
ded tir epressur eist he pressur especified fort he
tires ins talled on thev ehicle at thef actor y. 214
Wheels and tires