2020 MERCEDES-BENZ S-CLASS Owner's Manual

Pr
eceding letter 1 1:
R Without :passeng ervehicle tires accor dingto
Eur opeanm anufactu ring standar ds.
R "P": passe nger vehicle tires accor dingtoUS
manuf acturingstandar ds.
R "LT": light truc kt ires acc ordin gtoU Sm anu‐
fa ctur ingstandar ds.
R "T": com pact emer gency sparewheels with
high tirep ressur ethat areo nly designe dfor
te mp orar yu seinan emer gency .
As pec tratio 3 3:
Ra tio betwee nt ireh eight and tirew idth inpe r‐
cent (tire height divided bytirew idth ).
Tir ec ode4 4
(tire type ):
R "R"r adial tire
R "D": bias plytire
R "B": bias beltedtires
R "ZR": radial tirew itham aximum speedabove
14 9m ph(240 km/h) (optional) Rim
diame ter5 5
:
The diam eter oftheb ead seat (notthe diame ter
of ther im flang e).The rimd iame teri ss pecif ied
in inc hes (in).
Load-be aring inde x6 6:
Numer icalcode that spec ifies them aximum
load-bear ingcapacity ofat ire( e.g. "91" cor re‐
sponds to1356 lbs (615 kg)).
The load-bear ingcapacity ofthet irem ustb ea t
leas thalf thep ermissible axleload ofyour vehi‐
cle. Donoto verload thet ires by exc eeding the
specif iedload limit.
See also:
R Maximum permissible loadontheT irea nd
Loadi ngInfo rm atio nplacar d(/pag e454)
R Max imum tirel oad (/page461)
R Load index
Speed ratin g7 7:
Spe cifiest he appr ovedm aximum speedofthe
tir e. %
Anelectr onicspeed limi terp reve nts your
ve hicle from exceeding aspeed of130m ph
(2 10 km/h) .
Ma kesur ethat your tires have ther equir ed
speed rating .You can obtain information onthe
re qu ired speed rating from anauthor ized
Mer cedes-B enzCent er.
Summ ertires Inde
xS peedrating
Qu pto1 00 mph(160k m/h)
Ru pto1 06 mph(170k m/h)
Su pto1 12 mp h(180k m/h)
Tu pto1 18 mp h(190k m/h)
Hu pto1 30 mph(210k m/h)
Vu pto1 49 mph(240k m/h)
Wu pto1 68 mph(27 0k m/h)
Yu pto1 86 mph(300 km/h) Wh
eelsan dt ires 463

Inde
xS peedrating
ZR ...Y 1
upto186m ph(300 km/h)
ZR...( ..Y)1
over186 mph(300 km/h)
ZR 1
over149 mph(240k m/h) R
Specifying thes peed rating asthe" ZR" inde x
in tirec ode 4isop tion alfort ires up to
18 6m ph(300 km/h).
R Ifyo ur tirec ode4 includes "ZR"andther e
is no speed rating 7,f indout what them ax‐
imum speed isfrom thet irem anuf actur er.
R Ifload-bear inginde x6 and speed rating 7
ar ei nb rack ets, them aximum speedrating of
yo ur tirei sa bove 186m ph(300 km/h). To
fi nd outthe maximum speed,askthet ire
manuf acturer. All-w
eather tires and wint ertires Inde
xS peedrating
QM +S2
upto100m ph(160 km/h)
TM +S2
upto118m ph(190 km/ h)
HM +S2
upto130m ph(210 km/h)
VM +S2
upto149m ph(240 km/h) Wi
nter tires bear the004D snowflak es ymbol
and fulfillther equir ements oftheR ubber Manu‐
fa ctur ersA ssoci ation (RMA) andtheR ubber
Assoc iationofCanada (RAC)rega rding thet ire
tra ction onsno w.
Load index8 8:
R Nospec ificat ion given: standar dload (SL)
tir e
R "XL" or"Ex tra Load": extral oa dt ireo rrein‐
fo rc ed tire
R "Light Load": lightloadtire R
"C", "D", "E":aload rang et hat depe ndso n
th em aximum loadthat thet irec an car ryata
cer tain pressur e Def
inition ofterm sfor tire sa nd loadin g
Ti re stru ctu reand charact eristics :descr ibes
th en umber oflaye rs or then umber ofrubber -
coat edbelts inthet irec ontact surface and the
tir ew all. These arem ade ofsteel, nylon, poly‐
es tera nd other materials.
Bar: metric unit fort irep ressu re.
14 .5038 pounds persquar einc h( psi)and
10 0k ilop asca l(kP a) isthee quivalent ofone bar.
DO T(Depar tment ofTranspo rtation ):DO T-
mar kedt ires fulf illther equir ements ofthe
US Depar tment ofTrans portatio n.
Av erag ew eight ofthev ehic leoccup ants:the
num bero fvehicle occupants forw hich thev ehi‐
cle isdesigned, multiplied by150lb( 68 kg).
1 "ZR" stat ed inthet irec ode.
2 Or "M+S 004D"f orwint ertires 46
4
Wheels andtires

Un
ifor mT ireQ uality Grading Standar ds:a
unif orms tandar dtog rade theq ualit yoftires
wit hregardt ot read qualit y,tiret racti on and
te mp eratur echar acteristics. Thequalit ygradin g
asses smentismade bythem anuf actur erfollo w‐
ing spec ificat ions from theU .S.government. The
qu alit ygrade ofat irei simp rint ed on thes ide
wa llof thet ire.
Re comm endedtirep ressu re:th er ecom men‐
ded tirep ress urei st he tirep ressur especif ied
fo rt he tires mount edtothev ehicle atthef ac‐
to ry.
The tirea nd information table con tains ther ec‐
omm ended tirep ress ures forc old tires, them ax‐
imum permissible loadandthem aximum per‐
missible vehicle speed.
The tirep ressur etable contains ther ecom men‐
ded tirep ress ures forc old tires under various
oper ating condit ions,i.e.loading and/orspeed
of thev ehicle.
Incr eased vehicl eweight duetooptiona l
eq uip ment :th ec ombin edweight ofall standar d
and optio nal equipme ntavailable fort he vehicle, re
ga rdless ofwhe ther itis actually installed on
th ev ehicle ornot.
Rim: thep arto fthe wheel onwhic hthe tirei s
ins talled.
GA WR (Gross AxleW eight Ratin g):th eG AWR
is them aximum permissible axleload. The
actual loadonanaxle mustnever exc eed the
gr os sa xle weight rating .The gross axlew eight
ra ting canbefound onthev ehicle identification
plat eonthe B‑pillar onthed rive r's side.
Speed ratin g:thes peed rating ispa rtof thet ire
identif ication .Its pecif iesthes peed rang ef or
whic hatirei sa ppr ove d.
GV W( Gross Vehicl eW eight ):th eg ross vehicle
we ight comprises thew eight ofthev ehicle
including fuel,tools, thes par ew heel, accesso‐
ri es installed, occupant s,lugg agea nd thet railer
dr aw bar nose weight ,ifa pplicable. Thegros s
ve hicle weight mustnotexc eed theg ross vehicle
we ight rating GVWR asspecif iedonthev ehicle
identif ication plateonthe B‑pillar onthed rive r's
side.
GV WR (Gross Vehicl eW eight Ratin g):th e
GV WR isthem aximum permitt edgross weight of
thef ully laden vehicle (weight ofthev ehicle
including allaccessor ies,occupants, fuel,lug‐
ga ge and thet railer draw bar nose weight ifappli‐
cable). Thegros sv ehicle weight rating issp eci ‐
fi ed on thev ehicle identification plateonthe
B‑pi llar on thed rive r's side.
Maxim umweight ofthel ad en vehicl e:the
maximu mweight isthes um ofthec urb weight
of thev ehicle, thew eight ofthea ccesso ries, the
maximu mloada nd thew eight ofoption aleq uip‐
ment installed atthef act ory.
Kilop ascal(kP a): metric unit fort irep ressu re.
6.9 kPac orresponds to1p si.A nother unit for
tir ep ress urei sb ar.1 00 kilop ascal(kP a) equals
1b ar.
Lo ad inde x:inadd ition tothel oad-bear ing
inde x,thel oad indexmayalso beimprint ed on
th es ide wallof thet ire. This specif iesthel oad-
bear ingcapacity ofthet irem orep recisel y.
Cur bw eight :th ew eight ofav ehicle withstand‐
ar de quipme ntinc ludin gthe maximum capacity
of fuel, oiland coolant. Italso includes thea ir
con ditionin gsystema ndoption aleq uipment if Wheels
andtires 465

th
ese arei nstalled onthev ehicle, butdoes not
include passeng erso rlugg age.
Maximum tirel oad: them aximum tirel oad is
th em aximum permissible weight inkilog rams or
lbs forw hich atirei sa ppr ove d.
Maxim umpermissible tirep ressur e:maxi‐
mum permissible tirep ressur efor one tire.
Maxim umload onone tire: maxim umloado n
one tire. This iscalcu lated bydividing them axi‐
mum axleload ofone axle bytwo.
PSI (pounds persquar einc h):st andar dunit of
meas uremen tfor tirep ressu re.
Aspe ctratio :ra tio betwee nt ire height and tire
wi dthi np ercent.
Tir ep ress ure: press urei nsi de thet irea ppl ying
an outw ardf orce toeve rysquar einc ho fthe tire.
The tirep ressur eiss pecif iedinpounds per
sq uar einc h( psi), inkilopascals (kPa)or inbar .
The tirep ressur eshould onlybec orrected whe n
th et ires arec old.
Cold tirep ressur e:thet ires arec old when the
ve hicle hasbeen parkedf or atleas t3h ours wit
hout direct sunli ghtonthet ires orthev ehicle
has been driven forl ess than 1m ile(1.6 km ).
Ti re contact surface: thep arto fthe tiret hat
comes intoc ontact with ther oad.
Ti re bead: thep urpose ofthet ireb ead isto
ensur ethat thet ires its secur elyo nthe wheel
ri m. Ther eareseveralw irec ores inthet ireb ead
to preve ntthet iref romc hanging lengthonthe
whee lrim.
Sid ew all: thep arto fthe tireb etwe en thet read
and thet ireb ead.
We ight ofoptiona lequ ipm ent:th ec ombin ed
we ight oftheo ption aleq uipment weighin gmore
th an ther eplaced standar dparts and morethan
5l bs (2.3k g).T his optional equipment, suchas
high-per form anc ebrake s,leve lc on trol system, a
ro of lugg ager acko rhigh-per form anc ebatteries,
is no tincluded inthec urb weight andthew eight
of thea ccessor ies.
TIN (TireI dentif ication Numbe r):au niqu e
ident ificat ion numb erwhic hcan be used bya
tir em anufactu rert oi dent ifytires, fore xamp le,
in ap roduc trecall, andthus iden tifyt he pur‐
ch aser s.The TINismade upofthem anuf actur‐ er's
identit ycode, tires ize, tiret ype code and
th em anuf actur ingdate.
Load-bear inginde x:thel oad-bear inginde xisa
code that con tains them aximum load-bear ing
capacity ofat ire.
Tr actio n:traction istheg ripr esulting from fric‐
tion between thet ires and ther oad surface.
We arindi cator:nar row bars(tread wearbar s)
th at ared istribut edove rthe tirec ontact surface.
If th et iret read isleve lw itht he bar s,thew ear
limit of1/1 6in( 1.6m m)has been reac hed.
Dis tribut ionofvehicl eoccupants: distribu tion
of vehicle occupants over designat edseat posi‐
tion sinav ehicle.
Maximum permissible payload weight :nom i‐
nal load andluggagel oad plus 150lb( 68 kg)
multip liedb ythe number ofseats inthev ehicle. 466
Wheels andtires

Cha
nging awheel No
teso ns electing, installing andreplac ing
tir es Mer
cedes -AMG vehicl es:obse rvet he notesi n
th eS upplement .Other wise, youm ayfailto rec‐
ogni zedangers.
Yo uc an ask fori nfor mation rega rding permitted
wheel/ tirec om binat ionsatan aut hor ized
Mer cede s-Ben zCent er. &
WARNIN GRisk ofacci dent duet oincor‐
re ct dimensi onsofwhe elsa nd tires
If whe elsa nd tires ofthew rong size are
ins talled, thew heel brak es orwheel suspen‐
sion componen tsma ybed amag ed. #
Alw aysr eplace wheels andtires wit h
th ose that fulf illthes pecif ication sof
th eo riginal part.
When replacing wheels, makesuret of itth e
cor rect:
R Desi gnati on R
Mod el
Whe nreplacing tires, mak esuret oinstallth e
cor rect:
R Desi gnati on
R Manuf actu rer
R Model &
WARNIN GRisk ofinju rythro ugh exceed‐
ing thes pecif iedtirel oad rating orthe
per missible speedrating
Ex cee ding thes pecif iedtirel oad rating or
th ep ermissible speedrating maylea dt ot ire
da ma geand tothet ires bur sting. #
Ther efor e, onl yusetiret ypes andsizes
appr ovedfor your vehicle model. #
Obser vethet irel oad rating andspee d
ra ting requ ired fory our vehicle. *
NO
TEVehicle andtired amag ethrough
tir et ypes and sizes that have notb een
ap prove d Fo
rs afet yr easons, onlyusetires, wheel s
and accessories whic hhave been speciall y
appr ovedbyM ercedes-Ben zfor your vehicle.
These tires ares pecially adaptedt ot he con‐
tr ol systems, suchasA BS,ESP ®
and
4MA TIC,andmarkeda sfollo ws:
R MO =Mercedes-Ben zOriginal
R MOE =Mercedes-Ben zOriginal Extended
(r un-f lattireo nlyf or cer tain wheels)
R MO1 =Mercedes -Benz Original (onlycer‐
ta in AMG tires)
Cer tain charact eristic s,suc hashandlin g,
ve hicle noise emissions, consumption, etc.
ma yother wise beadv ersely affect ed. Fur‐
th er mor e,other tires izes could result inthe
tir es rubbing agains tthe body andaxle com‐
ponents whenloaded. Thiscould result in
damag etot he tireo rthe vehicle. Wheels
andtires 46
7

Onl
yusetires, wheels andaccessor iesthat
ha ve been checkeda nd recomme ndedby
Mer cedes-Ben z. *
NO
TERisk todriving safetyf romr etre a‐
de dt ires Re
trea de dt ires aren eith er tested nor recom‐
mend edbyMer cedes-Ben z,since prev ious
damag ecanno ta lway sb ed etect edon
re trea de dt ires .
Fo rthis reason drivin gsafet yc anno tb eg uar ‐
ant eed. #
Donotu se used tire si fy ou have no
inf orma tiona bout their prev ious usage. *
NO
TEPossible damag etow heels ortires
when drivin govero bstacle s Larg
ewheelsh ave alow ertires ection width.
The lowe rthe tires ect ion widt h,theg reater
is ther isk ofdama getowheels ortires when
dr ivin govero bstacle s. #
Avoid obstacle so rdrive particular ly
car efu lly. *
NO
TEDama getoelectr oniccomponen t
par tsfrom theu seoftire-moun tingtools Ve
hicl eswith atirep ress urem onit oring
sy stem: Electronic component partsare
locat edinthew heel. Tire -mou nting tools
should notb eu sed inthea reao fthe valve.
This could other wise damag ethe electr onic
com ponent parts. #
Have thet ires chang edataq ualif ied
spec ialistworks hop only. *
NO
TEDama getosummer tires atlow
ambient temp eratur es At
lowa mbien ttem per atur es,tear sc oul d
fo rm when drivin gw iths umm ertires, caus‐
ing perman entdamag etot he tires. #
Attemp eratur esbelo w45°F(7° C),
use M+S tires . Ac
cess oryp arts that aren otappr ovedfor your
ve hicle byMer cedes-Ben zorare notb eing used
cor rectl yc an impairth eo per ating safety.
Bef orep urch asing andusing non-appr oved
acc esso ries, visit aqualif iedspec ialistworks hop
and inquirea bout :
R Suit ability
R Leg alstipulation s
R Factor yr ecom mendatio ns &
WARNIN GRisk ofacci dent with high
per form anc etires
The spec ialtiret read incom binatio nwitht he
op timized tirec om pound means that ther isk
of skid ding orhydroplaning onwetroads is
incr eased .
In addi tion ,the tireg ripi sg reatl yr educed at
al ow outside temp eratur eand tirer unn ing
te mp eratur e. #
Switc honthe ESP ®
and adap tyour
dr iving stylea ccor dingly. #
Use M+S tirea toutside temp eratur es
of less than 10 °C (50 °F). 468
Wheels andtires

Obser
vethef ollo wing when selecting, installing
and replacing tires:
R Onlyusetires and wheels ofthes ame type
(summer tires, wint ertires, MOEx tende d
tir es) and thes ame make.
R Onlyins tal lw heels ofthes ame sizeonone
axle (leftand right).
It is onl ypermissible toins tallad iffe re nt
wh eelsizei nt he eve ntofaflat tirei no rder
to drivet ot he specialis tworks hop.
R Onlyins talltir es ofthec orrect size ontothe
whee ls.
R Vehicl eswith atirep ress urem onit oring
sy stem: Allinstalled wheels mustbee quip‐
ped withfunc tion ingsensorsfor thet ire
pr essur emonit oring system.
R Attemp eratur esbelo w45°F(7° C), use win‐
te rt ires orall-seaso ntirem arke dM +Sfora ll
whee ls.
Wi nter tires bearing the004D snowflak es ym‐
bol inaddition totheM +Smar king prov ide
th eb estp ossible grip inwintr yroad condi‐
tions. R
ForM +Stires, only usetires wit hthe same
tr ead.
R Obser vethem aximum permissible speedfor
th eM +Stires installed.
If th is isbelo wthe vehicle's maximum speed,
th is mus tbeindic ated byan appr opriate
label inthed rive r's field ofvision.
R Break inne wt ires atmoder ates peeds for
th ef irst 60 miles( 10 0k m).
R Replace thet ires afte rs ixyearsa tthe latest,
re ga rdless ofwe ar.
R Wh enreplac ingwith tires that donotfea‐
tu re run-flat charact eristics :ve hicles with
MOExt ended tires aren otequipped witha
TIREFIT kitatthef act ory. Eq uipt he vehicle
wit haT IREFIT kitafte rr eplacing withtires
th at do notfeatur erun- flat charact eristic s,
e.g .winter tires.
Fo rm orei nfor mation onwhee lsand tires, con‐
tac taq ualifiedspec ialistworks hop.
Be suretoa lso obse rvet he follo wing further
re lat ed subje cts:
R Noteso ntirep ressur e(/pag e448) R
Tire and Loadi ngInfo rm atio nplacar d
(/ page454)
R Tire size designation, load-bearing cap acity,
spe edrating andload index(/ pag e462)
R Tire pressur etable (/page449)
R Noteso nthe emer gency sparewheel
(/ page477) No
teso nrotating whee ls &
WARNIN GRisk ofinju rythro ugh differ‐
ent whee lsizes
Int erch ang ingthef ront and rear wheels ifth e
wheels ortires have differe nt dimens ions
ma yseve rely im pa irth ed riving charact eris‐
tic s.
The wheel brak es orwheel suspension com ‐
pon entsm ayalso bedamag ed. #
Rotate front and rear wheels onlyifth e
wheels andtires areo fthe same dimen‐
sions. Wheels
andtires 469

The
wearpat tern so nthe front and rear wheels
dif fer:
R Front wheels wearmor eonthe shoulder of
th et ire
R Rear wheels wearmor eatthe cent erofthe
tir e
Do notd rive with tires that have tool ittle tread
dep th.T hiss ignif ica ntlyreduces traction onwet
ro ads (hydr oplan ing).
On vehicles that have thes ame sizefront and
re ar wheels ,rotatet he wheels accordingtothe
int erva ls in thet irem anuf actur er'swarrant y
book inyour vehicle documents. Ifth is isno t
av ailable, rotate thet ires every
3,000 to6,000 miles(5,000 to10,000 km),
dependin gonthe wear.E nsuret hat thed irect ion
of rotatio nism aint ained .
Ob servet he instructions andsafetyn otes on
"Changing awheel" when doing so
(/ page471). No
teso ns toring wheels When
stor ing wheels, observethef ollo wing
no tes:
R Afterr emo ving wheels, stor et hem inac ool,
dr ya nd prefer ably darkplace.
R Protect thet ires from contact with oil, grease
or fuel. Ov
ervie wo fthe tire-c hang etool kit Apar
tfroms ome country- specif icvariant s,vehi‐
cles aren otequipped withat ire-c hang etool kit.
Fo rm orei nfor mation onwhi chtire-c hangi ng
to ols arer equir ed and appr ovedfor per form ing a
wheel chang eonyour vehicle, consult aqualif ied
spec ialistworks hop.
Re quired tire-c hang etools mayinclude, for
ex am ple:
R Jack
R Choc k
R Lugw renc h
The tire-c hang etool kitislocat edunder the
tr unk floor . 1
Ratche t
2 Alignme ntbolt
3 Jack ing suppor t
4 Jack
5 Lugw renc h
6 Folding choc k 47
0
Wheels andtires