2018 MERCEDES-BENZ E-CLASS SEDAN winter tires

The system checks thet irep ressur eand thet ire
te mp eratur eofthe tires fitted tothev ehicle by
means of atirep ressure sensor.
Ne wt irep ressur esensors, e.g. in winter tires,
ar ea utomaticall ytaught-in thef irst tim etheya re
driven.
The tir epressur eand thet iret emperature
appear in them ultifunction display
(
→pag e206).
If th er eisas ubstantia lpressure loss or if the
tir et emperatur eisexcessive, awarning will be
given:
RVi ad ispla ymessages (→page426).
RViat he h warning lam pinthe instrument
clus ter(→pag e456).
It is thed rive r's responsibility tosetthe tire
pressur etotherecommended cold tir epressure
suitable fort he operating situation. Se tthe tire
pressur efor cold tires using atirep ressure
ga uge. Notethat thec orrect tir epressur efor the
cur rent operating situatio nmustfirst be taught-
in to thet irep ressur emonitoring sy stem. In mos
tcases, thet irep ressur emonitoring sys‐
te mw illautom atically updat ethe ne wreference
va lues af tery ou ha vechanged thet irep ressure.
Yo uc an,h ow ever,a lso updat ethe refere nce val‐
ues byrestartin gthe tir epressur emonitoring
sy stem manuall y(
→page361).
Sy stem limitations
The sy stem ma y
bei mpaired or ma ynotfunction
in thef ollowing situations:
RIfth et irep ressur eiss etincor rectly.
RIfth er eisas udden pressur eloss caused, for
ex ample, byaforeign object penetratin gthe
tire.
RIf th er eisam alfunction caused byano ther
ra dio signal source.
Mak esuretoo bservethef ollowing fur ther rela‐
te ds ubjec t:
RNotesont irep ressur e(→page356)
Checking thet irep ressur ewitht he tir epres‐
sur em onitoring sy stem
Requ irement:
RThe ignition is switched on. On-boar
dcomputer:
,6HUYLFH.7LUHV
One of thef ollowing displa ysappears:
RCur rent tir epressur eand tir etemperatur eof
th ei ndividual wheels:
R7LUH SUHVVXUH ZLOO EH GLVSOD\HG DIWHU GULYLQJ D
IHZ PLQXWHV
R7LUH 3UHVVXUH 0RQLWRU $FWLYH:t heteach-in
process of thes ystemisn ot yetcomple te.
The tir epressures ar ealready being moni‐
to re d.
#Compar ethe tir epressur ewitht he recom‐
mended tir epressur efor thec urrent operat‐
360
Wheel sand tires

IndexS peedrating
ZR...Y
1up to186m ph (300 km/h)
ZR...(..Y)
1ove r186 mph(300 km/h )
ZR
1ove r149 mph(240k m/h)
RSpecifying thes peed rating as the" ZR" index
in tir ecode 4is optional fort ires up to
18 6m ph (300 km/h).
RIfyo ur tir ecode4 includes "ZR"andthere
is no speed rating 7,f ind out what them ax‐
imum speed is from thet irem anufacturer.
RIf load-bearing index 6and speed rating 7
ar einb rack ets, them aximum speed rating of
yo ur tir eisa bove 186m ph (300 km/h). To
fi nd outt he maximum speed, ask thet ire
manufacturer. All-weather tires and winter tires
Inde
xS peedrating
QM +S
2upto100m ph (160 km/h)
TM +S
2upto118m ph (190 km/h)
HM +S
2upto130m ph (2 10km/h)
VM +S
2upto149m ph (240 km/h)
Winter tires bear thei snowflak esymbol
and fulfill ther equirements of theR ubber Manu‐
fa cturer sAssociation (RMA) and theR ubber
Associatio nofCanada (RAC) rega rding thet ire
traction on sno w.
Load index 8
:RNo specification given: standar dload (SL)
tire
R"XL" or "Extra Load": extral oa dt ireorr ein‐
fo rc ed tire
R"Light Load": light load tire
R"C", "D", "E": aload rang et hat depe ndso n
th em aximum load that thet irec an car ryat a
cer tain pressure
Definition of termsfor ti resa nd loading
Ti re stru ctureand characteristics: describes
th en umber of la yers or then umber of rubber-
coated belts in thet irec ontact surf ace and the
tir ew all. These ar emade of steel, nylon, poly‐
es tera nd other materials.
Bar: metric unit fort irep ressure .
14 .5038 pounds per squar einc h( psi) and
10 0k ilopasca l(kPa) is thee quivalent of one bar.
DO T(Department of Transport ation):DOT-
mar kedt ires fulfill ther equirements of the
US Department of Transpor tatio n.
Av erag eweight of thev ehicle occupants: the
numbe rofvehicle occupants forw hich th evehi‐
cle is designed, multiplied by150lb( 68kg).
1"ZR" stated in thet irec ode.2Or "M+S i"for winter tires
Wheels and tires 37
1

Observethef ollowing when selecting, ins talling
and replacing tires:
ROnl yuse tires and wheels of thes ame type
(summer tires, winter tires, MOEx tended
tires) and thes ame make.
ROnl yins tal lw heels of thes ame size on one
axle (lef tand right).
It is onl ypermissible toins tallad iffe re nt
whee lsizeint heeve nt of aflat tir eino rder
to driv etot he specialis tworks hop.
ROnl yins tall tires of thec orrect size ont othe
wheels.
RVe hicles with atirep ressur emonitoring
sy stem: all mounte dwheels mus tbeequip‐
ped wit hfunctioning sensor sfor thet ire
pressur emonitoring sy stem.
RAt temp eratures belo w45°F(7°C), use win‐
te rt ires or all-seaso ntires mar kedM +Sfor
all wheels.
Wi nter tires bearing thei snowflak esym‐
bol in addition totheM +S marking pr ovide
th eb estp ossible grip in wintr yroad condi‐
tions.
RFo rM +S tires, only use tires wit hthe same
tread.
RObser vethem aximum permissible speed for
th eM +S tires ins talled.
If th is is belo wthe vehicle's maximum speed,
th is mus tbeindicated in an appropriat elabel
in thed rive r's field of vision.
RRu ninn ewtires at moderat espeed sfor the
fi rs t60m iles (100km).
RReplace thet ires af ters ixyearsatt he latest,
re ga rdless of wear.
RWhen replacing with tires that do no tfea‐
tu re run-flat charac teristics:vehicles with
MOExtended tires ar enotequipped wit ha
TIREFIT kit at thef actor y.Equi pthe vehicle
wit haT IREFIT kit af terr eplacing wit htires
th at do no tfeatur erun- flat characteristics,
e.g .winter tires.
Fo rm orei nformation on wheels and tires, con‐
ta ct aq ualified specialis tworks hop.
Be sur etoalso observ ethe following fur ther
re lated subjects:
RNo tesont irep ressur e(→page356)
RTire and Loading Info rmatio nplacard
(→pag e361)
RTire size designation, load-beari ng capacity,
speed rating and load ind ex(→pag e369)
RTire pressur etable (→pag e357)
Note sonr otating wheels
&
WARNING Risk of injury thro ugh dif fer‐
ent wheels izes
Inter changing thef ront and rear wheels if the
wheels or tires ha vediffere nt dimensions
ma yseve rely impair thed riving characteris‐
tics.
The wheel brakes or wheel suspension com‐
ponent smayalso be damaged.
#Rotate front and rear wheels only ifth e
wheels and tires ar eofthe same dimen‐
sions.
37 6
Wheels and tires