2020 MERCEDES-BENZ E-CLASS CABRIOLET Owner's Manual

ing
con dition (/page395 ).Obser vethe
no teson tirete mp eratur e(/ page39 4).
% The values displa yedin themultifunc tiondis‐
pla yma yde viat efrom those ofthetir epr es‐
sur ega ug eas they referto sea leve l.At high
altitudes, thetir epr essur eva lues indic ated
by apr essur ega ug ear ehigh erthan those
sho wnbytheon- boar dcom puter.In this
case, donotre duce thetir epr essur e.
Mak esur eto obser vethefo llo wing further rela‐
te dsubjec t:
R Noteson tirepr essur e(/ page39 4)
Re star ting thetir epr essur emoni toring sys‐
te m
Re quirement s:
R The recomme ndedtirepr ess ureis cor rectl y
se tfo rth ere spectiv eoper ating status on
eac hof thefo ur wheel s(/ page39 4).
Re star tth etir epr essur emonit oring system in
th efo llo wing situat ions:
R The tirepr essur ehas chang ed.
R The wheels ortires have been chang edor
ne wlyins talled. On-
boar dcom puter:
4 Service 5
Tires #
Swipe down wardson theTo uc hCon trol on
th elef t-hand sideofthesteer ing wheel.
The Use Current Pressures asNew Refer-
ence Values? messageis sho wninthemulti‐
func tion displa y. #
Tobegin restar t,pr ess theTo uc hCon trol on
th elef t-hand sideofthesteer ing wheel.
The Tire Press. MonitorRestart edmessag eis
sho wninthemultifunc tiondispla y.
Cur rent wa rning mess ages aredele tedand
th eye llo w0077 warning lam pgoes out.
Af teryo uha ve been driving fora fe w
minut es,thesy stem checks whe ther thecur‐
re nt tirepr ess ures arewi thin thespecif ied
ra ng e. The current tirepr ess ures areth en
accep tedas refere nce values andmon itor ed.
Mak esur eto obser vethefo llo wing further rela‐
te dsubjec t:
R Noteson tirepr essur e(/ page39 4) Ra
dio -equipme ntappr oval of thetir epr es‐
sur emoni toring system
Ra dio equipme ntappr oval number s Co
untr yR adiotype approval number
Ca nada IC:2546A -AG5S P4
US AF CCID:MRXA G5SP4
FCC ID:MRXM FR Fu
rther information onthedeclar ationofcon ‐
fo rm ity forwir eles sve hicle component s
(/ page26). Ti
re pres sur elo ss wa rning system Fu
nction ofthetir epr essur eloss warning
sy stem
The tirepr essur eloss warning system warnsth e
dr iver by means ofdisp lay messa geswhen ther e
is ase vere tirepr es su re loss.
Af tera ch ang ein tirepr essur e,awheel rotatio n
or atir ech ang e,or ifyo uha ve re-ins talled
wheels ortires, thetir epr essur eloss warning
sy stem has tobe restar ted(/ page400) . Wheels
andtires 399

The
tirepr essur eloss warning system does not
re place theneed toregular lych eckth etir epr es‐
sur e.
Sy stem limita tions
The system maybe impair edorma yno tfunc tion
par ticular lyin thefo llo wing situat ions:
R Incorrectl yse ttir epr ess ure
R Sud den press urelos scau sed,fo rex am ple,
by afo re ign obje ctpene trating thetir e
R Steady pressur eloss inseveraltir es
The system has are strict ed ordel ayed func tion
par ticular lyin thefo llo wing situat ions:
R Poor ground condit ions,e.g.snowor grave l
R Driving with sno wch ains
R When adoptingave ry spor tydriving style
wit hhigh corner ing speeds orsudden accel‐
er ation
R Drivin gwit hahigh load
Be sureto also obse rveth efo llo wing further
re lat ed subje cts:
R Noteson tirepr essur e(/ page39 4) R
Displa ymessag esabout thetir es
(/ page47 3)
Re star ting thetir epr essur eloss warning
sy stem
Re quirement s:
R The recomme ndedtirepr ess ureis cor rectly
se tfo rth ere spectiv eoper ating status on
eac hof thefo ur wheel s(/ page39 4).
Re star tth etir epr essur eloss warning system in
th efo llo wing situat ions:
R The tirepr essur ehas chang ed.
R The wheels ortires have been chang edor
ne wlyins talled.
On- boar dcom puter:
4 Service 5
Tires #
Swipe down wardson theTo uc hCon trol on
th elef t-hand sideofthesteer ing wheel.
The Tire Pressure ControlSystem
Act iveR estart :Press Touch Controlmessag e
is sho wninthemultifunc tiondispla y. Re
star tth etir epr essur eloss warning system in
th efo llo wing situat ions:
R The tirepr essur ehas chang ed.
R The wheels ortires have been chang edor
ne wlyins talled. #
Tobegin there star t,pr ess theTo uc hCon trol
on thelef t-hand sideofthesteer ing wheel.
The Tire Pressure NowOK?messag eis
sho wninthemultifunc tiondispla y. #
Select Yes. #
Toconf irm there star t,pr ess theTo uc hCon ‐
tr ol on thelef t-hand sideofthesteer ing
wheel.
The Run FlatIndic atorRestart edmessag eis
sho wninthemultifunc tiondispla y.
Af teryo uha ve driven fora fe w min utes, the
tir epr es su re loss warning system monit ors
th ese ttir epr essur esofall thetir es.
Be sureto also obse rveth efo llo wing further
re lat ed subje cts:
R Noteson tirepr essur e(/ page39 4) 400
Wheels andtires

Load
ingtheve hicl e No
teson Tire and Loading Information plac‐
ar d &
WARNIN GRisk ofacci dent from overloa‐
ded tires
Ov erloaded tires ma yove rheat and burstas a
con sequenc e.Ov erloaded tires can also
im pair thesteer ing and handling charact eris‐
tic sand lead tobrak efa ilur e. #
Obser vetheload-bear ingcapacity of
th etir es. #
The load-bear ingcapacity mustbe at
leas thalf thegr oss axle weight rating of
th eve hicle. #
Neverove rload thetir es by exc eeding
th emaximum load. The
Tire and Loadi ngInfo rm atio nplacar dis on
th eB-pillar onthedr iver's side oftheve hicle. 1
Tire and Loadi ngInfo rm atio nplacar d %
The datasho wnintheillus tration isexam ple
dat a.
The Tire and Loadi ngInfo rm atio nplacar dsho ws:
R Maximum numberofseats 2accor dingto
th emaximum numberofpeople permitt edto
tr ave lin theve hicle.
R Maximum permissible load3com prises the
gr os swe ight ofall vehicle occupants, load
and luggage. Wheels
andtires 40
1

R
Recomme ndedtirepr ess ures 1 forcold
tir es. The recomme ndedtirepr ess ures are
va lid forth emaximum permissible loadand
up tothemaximum permissible vehicle
speed.
Please alsonote:
R Information onper missib lewe ight sand loads
on theve hicle identif ication plate
(/ page426).
R Information ontirepr essur ein thetir epr es‐
sur eta ble (/ page395).
Fu rther relat ed subje cts:
R Determ inin gth emaximum permissible load
(/ page402)
R Noteson tirepr essur e(/ page39 4). De
term ining thema xim um permis sible load The
follo wing steps have been developed as
re qu ired ofall manuf acturersunder Title 49,
Co de ofU.S. Feder alRe gulations, Part57 5pur‐
sua nttothe"N ational Traf fic and MotorVe hicle
Saf etyAc tof 1966". #
Ste p1: loca tethest at emen t"The combined
we ight ofocc upant sand cargoshould never
exc eed XXX kgorXXX lbs." ("The combined
we ight ofocc upant sand cargoshould never
exc eed XXX kgorXXX lbs.") onyour vehicle's
Ti re and Loadi ngInfo rm atio nplacar d. #
Ste p2: determ ine thecombin edweight of
th edr iver and passeng ersth at will betravel‐
ing inyour vehicle. #
Ste p3: subtr act thecombin edweight ofthe
dr iver and passeng ersfrom XXX kgor
XXX lbs. #
Ste p4: there sulting figur eeq uals theper‐
missible cargoand luggageload capacity .Fo r
ex am ple: If"XXX "eq uals 1400 lbs and ther e
ar efive occupant sin your vehicle witha
we ight of150lbs eac h,themaximum cargo
and luggageload capacity is650 lbs(1,400 -
75 0(5 x15 0) =650 lbs). #
Ste p5: determ ine thecombin edweight of
lugg ageand cargothat theve hicle willbe
car rying. Forsaf etyre ason s,this we ight may
no tsaf elyexc eed theav ailable cargoand lug‐
ga ge load capac itycalc ulatedinstep 4. Ev
en ifyo uha ve cal cul ated thetot alload care‐
full y,yo usho uld still mak esur eth at themaxi‐
mum permissible gross mass andthemaximum
gr oss axle weight rating ofyour vehicle areno t
exc eeded. Details can befound ontheve hicle
identif ication plate. #
Have your loaded vehicle –including driver ,
occupants andload –we ighed onave hicle
we ighbr idge.
The measur edvalues mayno texc eed the
maximu mper missi blevalues stat ed on the
ve hicle identif ication plate.
Fu rther relat ed subje cts:
R Calculation exam ple forde term inin gth emax‐
imum load(/page403)
R Tire and Loadi ngInfo rm atio nplacar d
(/ page40 1)
R Tire pressur eta ble (/ page395)
R Vehicle identif ication plate 402
Wheels andtires

Calcu
lation exam ple forde term ining the
ma ximum load The
follo wing table showsexam ples ofhowto
cal cul ateto ta land load capac itieswithva rying seatin
gcon figur ations anddiffere nt num bers
and sizes ofocc upant s.The follo wing exam ples
use amax imum loadof1500 lbs (680 kg).This
is forillus tratio npur pos esonly.Mak esur e
yo uar eusin gth eactual loadlimit foryo ur vehi‐ cle
stat ed on your vehicle's Tire and Loadi ng
In fo rm atio nplacar d(/ page40 1).
The high erthewe ight ofall theoccupant s,the
smaller themaximum loadforlug gage .
Ste p1 Ex
am ple 1E xamp le2
Combine dmaxim umweight ofocc upant sand
load (datafrom theTire and Loadi ngInfo rm atio n
placar d) 15
00 lbs (680 kg)1 500lbs(680 kg) Ste
p2 Ex
am ple 1E xamp le2
Nu mb erofpeople intheve hicle (driver and
occupants) 51
Dis trib uti on oftheoccupant sF ront:2
Re ar:3 Fr
ont :1 Wheels
andtires 403

Ex
am ple 1E xamp le2
We ight ofocc upant sO ccupant1:150lbs (68 kg)
Occupant 2:180lbs (82 kg)
Occupant 3:160lbs (73 kg )
Occupant 4:140lbs (63 kg)
Occupant 5:120lbs (54kg ) Occupant
1:200 lbs(91 kg )
To talwe ight ofall occ upant s7 50lbs (340 kg)2 00lbs (91 kg ) Ste
p3 Ex
am ple 1E xamp le2
Pe rm issible load(maxim umgros sve hicle weight
ra ting from theTire and Loadi ngInfo rm atio n
placar dmin usthegr oss weight ofall occ upant s)15
00 lbs (680 kg)00F8 75 0lbs (340 kg)= 75 0lbs
(340 kg) 15
00 lbs (680 kg)00F8 200 lbs(91 kg )= 13 00 lbs
(589 kg) 40
4
Wheels andtires

Ti
re labeling Ov
ervie wof tirelabeling 1
Uniform Tire Qua lityGradi ng Standar d
(/ page40 5)
2 DOT,Tire Identif ication Number
(/ page406)
3 Maximu mtireloa d(/ page40 7)
4 Maximu mtirepr essu re(/ pag e40 7) 5
Manuf acturer
6 Char acteristics ofthetir e(/ page408)
7 Tire size designation, load-bearing cap acity,
spe edrating andload index(/ pag e408)
8 Tire nam e
% The data sho wnintheimag eis exam ple
dat a. Ti
re Quality Grading In
accor dance withth eUS Depar tmentof Trans ‐
por tatio n's "Uni form Tire Qua lityGradi ng Stand‐
ar ds", tireman ufact urersar ere qu ired tograde
th eir tires on thebasis ofthefo llo wing thre eper‐
fo rm anc efa ct or s: 1
Tread weargrade
2 Tract ion grade
3 Temp eratur egr ade
% The datasho wnintheimag eis exam ple
dat a.
% The classificat ion isno tleg allyst ipulat edfor
Canad a,but itis ge ner ally stat ed.
Tr ead weargrade
The tread weargrade isacom parativ era ting
ba sedon thewe arrate ofthetir ewhen tested
under controlled conditions onaspecif iedtest
tr ac kof theUS Depar tmentof Trans portatio n.
Fo rex am ple, atir egr aded 150wo uld wearone Whee
lsand tires 405

and
one-h alftim esaswellon thego vernment
te st trac kas atir egr ad ed 100.
The relativ eper form anc eof tires depen dsupon
th eactual conditions oftheir use, howe ver,and
ma ydepar tsign ifican tly from thenor mdue to
va riatio nsindrivin ghabit s,ser vicepr act icesand
dif fere nces inroad charact eristic sand climate
con dition s.
Tr actio ngr ade &
DANG ER Risk ofacc iden tdue toinade‐
qu atetract ion
The tract ion grade assig nedtothis tireis
based onstra ight -ahead brakin gtract ion
te sts, and does notinclude either acceler a‐
tion, corner ing, hydroplaning orpeak traction
ch aract eristic s. #
Alw aysadap tyo ur drivin gst yle and
dr ive at aspeed tosuit thepr ev ailin g
traf fic and weather condition s. *
NO
TEDama getothedr ivet ra in from
wheelspin #
Avoid wheelspin. The
traction grades –from highes tto lowe st–
ar eAA ,A, Band C.Tho segrad es repr esent the
tir e'sab ility tostop onwetpa vement asmeas‐
ur ed under controlledconditions onspecif ied
go vernment test sur faces mad eof asp haltand
concr ete.
Te mp eratur egr ade &
WARNIN GRisk ofacci dent from tire
ove rheating andtirefa ilur e
The temp eratur egr ade forth is tireis es tab‐
lished fora tir eth at isproper lyinflat ed and
no tove rloaded. Excessiv espeed, underinfla‐
tion, orexc essiv eloading, either separ ately
or incombin ation,cancause excessiv eheat
build-up andpossible tirefa ilur e. #
Obser vethere comme ndedtirepr es‐
su resand regular lych eckth etir epr es‐ sur
eof all tires including thespar e
wheel. #
Adjus tth etir epr essur eas neces sary. The
temp eratur egr ades areA (the highes t),B
and C.The yre pr esent thetir e's resis tance tothe
ge ner ation ofhea tand itsability todissipat e
heat when tested under controlled conditions on
a specif iedindoor laborator yte st wheel. Sus‐
ta ined hightemp eratur ecan cause themat erial
of thetir eto deg ener ateand reduce tirelife, and
exc essiv ete mp eratur ecan lead tosudden tire
fa ilur e.Grade Ccor responds toaleve lof per‐
fo rm anc ewhic hall passe nger car tires mus t
mee tunde rth ere qu iremen tsof theUS Depar t‐
ment ofTrans portatio n. DO
T,Tire Iden tificat ionNumbe r(TI N) US
tirere gulations stipulat eth at eve rytire man‐
uf actu reror retrea de rmu stimprint aTIN inor
on theside wallof eac htir epr oduced. 406
Wheels andtires