2020 MERCEDES-BENZ SL ROADSTER light

Imp
ortant noteson tire pressu re G
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NING
If th etire pre ssur edro psrep eatedly, the
whee l,valv eor tire may bedamag ed.Tire
pre ssur eth at istoolow may result inatire
blow- out.Ther eis aris kof an acc iden t.
R Chec kth etire for foreign objects.
R Chec kwhet herthewhee lis losi ngair or
th evalv eis leak ing.
If you areunab leto rec tify thedamag e,con-
tac ta qualif iedspec ialist workshop. G
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NING
If you fituns uitable accessories onto tire
valv es,thetire valv esmay beove rloaded
and malf unction ,whic hcan caus etire pre s-
sur eloss .Due totheir desi gn,ret rofitte dtire
pre ssur emon itors keep thetire valv eopen .
This canalso result intire pre ssur eloss .
Ther eis aris kof an acc iden t.
On lyscrew thest and ard valvecap orother
valv ecap sappr ovedby Mer cedes- Benzfor
your vehicleon to thetire valv e.
Use asuit able pressur egauge tocheckth e
ti re pre ssur e.The outerappear anceof atire
does notper mit any reliable conclusio nabout
th etire pre ssur e.On veh icles equipp edwith
th eelec tron ictire pre ssur emon itor, thetire
pre ssur ecan bechecke din theon -board com-
put er.
The tire tempe rature and pressur einc reas e
when theveh icleis in mot ion.This isdepe nd-
en ton thedriv ingspee dand theload.
Ther efore, you should onlyco rrec ttire pre s-
sur eswhen thetires are cold.
The tires are cold:
R ifth eveh iclehas been parkedwithth etires
out ofdire ctsun lightfor atleast three hour s
and
R ifth eveh iclehas notbeen drivenfurther
th an 1mile (1.6km)
The tire tempe rature chang esdepe nding on
th eout side tempe rature, theveh iclespee d
and thetire load. Ifth etire tempe rature
ch ang esby 18 ‡(10 †), thetire pre ssur e
ch ang esby appr oximat ely10kPa(0. 1bar/
1. 5psi) .Tak eth is int oacc oun twhen checkin g th
epre ssur eof warm tires .On lyco rrec tth e
ti re pre ssur eif it is toolow forthecur ren t
oper ating cond ition s.Ifyou checkth etire
pre ssur ewhen thetires are warm ,th eres ult-
ing value willbehigh erthan ifth etires were
co ld. This isno rm al. Do notred uce thetire
pre ssur eto thevalue specifiedfor cold tires .
The tire pre ssur ewould other wise betoolow.
Obs erveth erec omm ended tire pre ssur esfor
co ld tires :
R on theTir eand Load ingInfor mat ionplac ard
on theB- pillar onthedriv er'sside
R in thetire pre ssur etab leon theins ide ofthe
fuel filler flap Und
erinflated orover inflated tires
Und erinflated tires G
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NING
Tir es wit hpre ssur eth at istoolow can over-
heat andburs tas aco nsequen ce.In addi-
ti on ,th ey also suffer from exce ssiv eand /or
irr egular wear,whic hcan severelyimpa irth e
brak ingproperties and thedriv ingcharac ter-
ist ics .Ther eis aris kof an acc iden t.
Av oid tire pre ssur esthat are toolow inall
th etires ,inc ludin gth espar ewhee l.
Un der inflat ed tires may:
R ove rheat,leadin gto tire def ects
R adve rselyaff ecthan dling
R wear exce ssiv elyand /orune venly
R hav ean adve rseeffecton fuel consumpt ion
Over inflated tires G
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NING
Tir es wit hex ce ssiv elyhigh pressur ecan
burs tbec ause they are damag edmor eeas-
ily by road debris,pot hole set c. In addit ion,
th ey also suffer from irregular wear,whic h
can severelyimpa irth ebrak ingproperties
and thedriv ingcharac teris tics .Ther eis a
ris kof an acc iden t.
Av oid tire pre ssur esthat are toohigh inall
th etires ,inc ludin gth espar ewhee l. Ti
re pressu re
301Wheels andtire s Z

stantly,
thetire pressure monitorismalfunc-
tioning.
In addition tothe warning lamp,amessage
appea rsinthe multifunction display.Observe
the information ondispla ymessages
(Y page 230).
It may take uptoten minutes foramalfunc-
tion ofthe tire pressure monitortobe indica-
ted. Amalfunction willbeindicated bythe tire
pressure warninglampflashing forapprox-
imately oneminute andthen remaining lit.
When themalfunction hasbeen rectified, the
tire pressure warninglampgoesoutafter a
few minutes ofdriving.
The tirepressure valuesindicated bythe on-
board computer maydiffer fromthose meas-
ured atagas station withapressure gage.The
tire pressures shownbythe on-board com-
puter refertothose measured atsea level. At
high altitudes, thetire pressure valuesindica-
ted byapressure gagearehigher thanthose
shown bythe on-board computer. Inthis case,
do not reduce thetire pressures.
The operation ofthe tire pressure monitorcan
be affected byinterferen cefrom radio trans-
mitting equipment (e.g.radio headphones,
two-way radios)thatmay bebeing operated in
or near thevehicle.
Checki ngthe tire pressure electroni-
cally X
Make surethattheSmartKey isin position
0048 (Ypage 126)inthe ignition lock.
X Press the0059 or0065 button onthe steer-
ing wheel toselect theServ. Serv.
menu.
X Press the0063 or0064 button toselect
Tire Pressure Tire
Pressure.
X Press 0076.
The current tirepressure ofeach tireis
shown inthe multifunction display.
If the vehicle hasbeen parked forover
20 minutes, theTire pressure willbe Tire
pressure willbe
displayed afterdriving afew minutes displayed
afterdriving afew minutes
message appears.
Aft erateach-in process, thetire pressure
monitor automatically detectsnewwheels or
new sensors. Aslong asaclear allocation of
the tire pressure valuetothe individua lwheels
is not possible ,the Tire Pressure Monitor Tire
Pressure Monitor
Active Active
displaymessage isshown instead of
the tire pressure display.The tirepressures
are alread ybeing monitored. Tire
pressure monitorwarning mes-
sages The
tirepressure monitordetectsapressure
loss inone ormore tires:
R Ifthe tire pressure monitordetectsapres-
sure lossinone ormore tires,awarning
message isshown inthe multifunction dis-
play .The yellow tire pressure warninglamp
then lights up.
R Ifthe Please Correct TirePressure Please
Correct TirePressure
message appearsinthe multifunction dis-
play ,the tire pressure inat least onetireis
too low. Thetirepressure mustbecorrect ed
when theopportunity arises.
R Ifthe Check Tires Check
Tiresmessage appearsinthe
multifunction display,the tire pressure inat
least onetirehas dropped significantly. The
tires must bechecked.
R Ifthe Warning TireMalfunction Warning
TireMalfunction mes-
sage appea rsinthe multifunction display,
the tire pressure inat least onetirehas
dropped suddenly .The tires must be
checked.
Observe theinstruct ionsandsafety notesin
the displa ymessages inthe "Tires" section
(Y page 230).
If the wheel positions onthe vehicle arerota-
ted, thetire pressures maybedispla yedfor
the wrong positions forashort time.Thisis
rectified afterafew minutes ofdriving, andthe
tire pressures aredispla yedforthe correct
positions.
Restart ingthe tire pressure monitor When
yourestart thetire pressure monitor,all
existing warning messages aredeleted andthe
warning lampsgoout. Themonitor usesthe
currently settire pressures asthe reference
values formonitoring. Inmost cases, thetire
pressure monitorwillautomaticall ydetect the
new reference valuesafteryouhave changed
the tire pressure. However, youcan also set
reference valuesmanuall yas described here.
The tirepressure monitorthenmonitors the
new tirepressure values.
X Set thetire pressure tothe value recom-
mended forthe corresponding drivingsitua-
tion onthe Tire andLoading Information
placard onthe driver's sideB-pillar
(Y page 299). 304
Tire
pressur eWheels andtires

wall
ofthetir e. You willfindth is aft erthelet-
ter that iden tifies thespeed rating
(Y page 310).
R Ifno spec ification isgiven :no text(as inthe
exam pleabove) ,repr esen tsast andar dload
(SL )tir e
R XL orExtra Load: represen tsarein forced
tir e
R Light Load: represen tsalight loadtire
R C, D, E:repr esen tsaload rangethat
depen dson themax imum loadthat thetir e
can carryat acer tain pressure
i Tire
data isvehic le-speci ficand may devi-
ate fromthedata intheexam ple.
Max imumload rating Maxim
umtireload 0043isthemax imum permis-
sible weight forwhich thetir eis approv ed.
Do not over load thetir es by exc eedin gth e
spec ified loadlimit.The maximum permissible
load canbefoun don thevehic le'sTire and
Loadin gIn for mat ionplacar don theB- pillar on
th edriv er's side (Ypage 306).
i The
actual values fortires are vehic le-spe-
cif icand may deviat efro mthevalues inthe
illust ration.
DOT, TireIdent ification Number (TIN) US
tireregulat ionsstipulate that ever ytir e
man ufact urerorret reader mustimprintaTIN
in or on thesidewall ofeach tireproduc ed. The
TINisaunique identificat ion num ber. The
TIN enabl esthetir eman ufact urersor ret read-
ers toinform purchaser sof rec alls and other
safet y-relevan tmat ters.Itmak esitposs ible
for thepurc haser toeasily identifyth eaffe cted
tir es.
The TINismade upofman ufact ureridentifica-
tio ncod e0044, tiresiz e0087, tiretype code0085
and man ufact uringdate 0083.
DOT (Depa rtment ofTransp ortation): tire
symbo l0043 mark sth at thetir ecom plies with
th erequir ementsof theU.S .Dep artmen tof
Tran spor tation.
Man ufactu rer ident ification code: manufac-
tur eriden tificat ion code0044 prov ides details on
th etir eman ufact urer.New tires have acod e
with twosymbo ls.Retr eaded tires have acod e
with foursymbo ls.
For further inform ation about retreaded tires,
see (Ypage 321).
Tir esize: identifier 0087 desc ribes thetir esiz e.
Tir ety pe code: tiretype code0085 can beused
by theman ufact urerasacod eto desc ribe
spec ificchar acterist icsofthetir e.
Dat eof ma nuf acture: date ofman ufact ure
0083 prov ides inform ation about theage ofa
tir e. The firstand second posit ionsrepresen t
th eweek ofman ufact ure,start ing with "01"
for thefirs tcalen darweek .Posit ionsthree and
four represen tth eyear ofman ufact ure.For
exam ple,atir eth at ismark ed"321 4"was
man ufact ured inweek 32in20 14.
i Tire
data isvehic le-speci ficand may devi-
ate fromthedata intheexam ple. All
abou twheels andtires
313Wheels andtires Z