run flat MERCEDES-BENZ SL CLASS 2020 User Guide

Imp
ortant noteson tire pressu re G
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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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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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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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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

Overinflated
tiresmay:
R increase thebraking distance
R adversely affecthandling
R wear excessively and/orunevenly
R have anadverse effectonride comfort
R be more susceptible todamage
Maximum tirepressures 0043
Example: maximum permissibletire pres-
sure
Never exceed themaximum permissibletire
inflation pressure. Alwaysobserve therecom-
mended tirepressure foryour vehicle when
adjusting thetire pressure (Ypage 299).
i The
actual valuesfor tires arevehicle-spe-
cific andmay deviate fromthevalue sin the
illu stration. Checki
ngthe tire pressures
Importa ntsafety notes The
tirepressure monitordoesnotwarn you
of:
R incorrect lyset tire pressure
R sudden lossoftire pressure, e.g.from afor-
eign object thathaspenetrated thetire
Observe thenotes ontire pressure
(Y page 299).
Information onair pressure forthe tires on
your vehicle canbefound:
R on the vehicle's TireandLoading Informa-
tion placard onthe B-pillar
R on the tire pressure tableinthe fuel filler
flap
R in the "Tire pressure" section Checki
ngtire pressures manually To
determine andsetthe correct tirepressure,
proceed asfollows:
X Remove thevalve capofthe tire that isto
be checked.
X Press thetire pressure gaugesecurely onto
the valve.
X Read thetire pressure andcompare itto the
recommended valueonthe Tire andLoading
Information placardorthe tire pressure
table (Ypage 299).
X Ifthe tire pressure istoo low, increase the
tire pressure tothe recommended value.
X Ifthe tire pressure istoo high, release air.
To do so, press downthemetal pininthe
valve, usingthetipofapen forexample.
Then check thetire pressure againusing the
tire pressure checker.
X Screw thevalve caponto thevalve.
X Repea tthese stepsforthe other tires. Tire
pressure monitor
General notes If
atire pressure monitorisinstalled, thevehi-
cle's wheels havesensors thatmonitor thetire
pressures inall four tires. Thetirepressure
monitor warnsyouifthe pressure dropsinone
or more ofthe tires. Thetirepressure monitor
only functions ifthe corresponding sensors
are installed inall wheels.
Information ontire pressures isdispla yedin
the multifunction display.After afew minutes
of driving, thecurrent tirepressure ofeach tire
is shown inthe Serv. Serv.
menuofthe multifunc-
tion displa y. Example:
currenttirepressure display
For information onthe message display,refer
to the "Checking thetire pressure electroni-
cally "section (Ypage 304). 302
Tire
pressur eWheels andtires

R
The jack must beplaced onafirm, flatand
non- slipsurface. Onaloose surface, alarge,
flat, load-bearing underlaymustbeused. On
a slippery surface, anon- slipunderlay must
be used, e.g.rubber mats.
R Do not use wooden blocksorsimilar objects
as ajack underlay. Otherwise, thejack will
not beable toachieve itsload-bearing capa-
city due tothe restr icted height.
R Make surethatthedistance between the
underside ofthe tires andtheground does
not exceed 1.2in(3 cm).
R Never placeyourhands andfeet under the
raised vehicle.
R Do not lieunder thevehicle.
R Do not start theengine whenthevehicle is
raised.
R Do not open orclose adoor orthe trunk lid
when thevehicle israised.
R Make surethatnopersons arepresent in
the vehicle whenthevehicle israised.
Vehicles withalloy wheels andhub caps:
the wheel boltsarecovered byahub cap.
Before youcan unscrew thewheel bolts,you
must remove thehub cap. Twodifferent var-
iants canbeinstalled. X
To remove: takesocket 0044and lugwrench
0087 from thevehicle toolkit(Ypage 280).
X Position socket0044onhub cap0043.
X Position lugwrench 0087onsocket 0044.
X Using lugwrench 0087,turn hubcap0043coun-
ter- clock wiseandremove it.
X To install: beforeinstalling, checkhub
cap 0043and thewheel areaforsoiling and
clean ifnecessary.
X Put hub cap0043inposition andturn until itis
in the right position. X
Position socket0044onhub cap0043.
X Attach lugwrench 0087tosocket 0044and
tighten hubcap0043.
The tighten ingtorque mustbe
18 lb-ft (25Nm).
i Note
thatthehub capshould betight-
ened tothe specified torqueof18 lb-ft
(25 Nm). Mercedes- Benzrecomm endsthat
you have thehub capinstalled ataqualified
specialist workshop. X
Using lugwrench 0087,loosen thebolts on
the wheel youwish tochange byabout one
full turn. Donot unscrew thebolts com-
pletely. The
jackingpoints arelocated justbehind the
front wheel housings andjust infront ofthe
rear wheel housings (arrows).
Mercedes-AMG vehiclesandvehicles with
AMG equipm ent:toprotec tthe vehicle body,
the vehicle hascovers installed nexttothe
jack ingpoints onthe outer sills. 318
Changing
awheelWheels andtires