change wheel MERCEDES-BENZ E CLASS 2019 Owner's Manual

Tirepressure
Notes on tire pressure
\nWARNINGRisk of accident duetoinsuf‐ficient orexcessive tire pressure
Underinflated oroverinflated tires posethefollowingrisks:
RThe tires may burst, especially astheload andvehicle speed increase.
RThe tires maywearexcessively and/orunevenly,which maygreatlyimpair tiretraction.
RThe drivingcharacteristics, aswell assteering and braking, may be greatlyimpaired.
Comply withtherecommended tirepressure andcheckthe tire pressure ofall tires includingthe spare wheelregu‐larly:
Rat least once a month
Rwhenthe loadchanges
Rbefore embarking on a longer journey
Rif operating conditionschange, e.g. off-road driving
Adjustthe tire pressure as necessary.
Driving withtire pressurethat istoo high ortoolow can:
RShortenthe service life ofthe tires.
RCause increased tire damage.
RAdversely affect drivingcharacteristics andthus driving safety,e.g. dueto hydroplaning.
\nWARNINGRisk of an accident duetoinsufficient tire pressure
Tires with pressurethat istoo low canover‐heat and burstas aresult.
In addition,theyalso suffer fromexcessiveand/or irregularwear, which can significantlyimpairthe braking properties andthe han‐dlingcharacteristics.
Avoidexcessively low tire pressures inallthe tires, includingthe spare wheel.
Tirepressure which istoo low can cause:
RTiredefects as aresult ofoverheating
RImpaired handlingcharacteristics
RIrregularwear
RIncreased fuel consumption
\nWARNINGRisk of accident fromexces‐sive tire pressure
Tires withexcessively high pressure canburstbecausetheyare damaged more easilybyhighwayfill, pot holesetc.
In addition,theyalso suffer from irregularwear, which can significantly impairthe brak‐ing properties andthe handlingcharacteris‐tics.
Avoidexcessively high tire pressures inallthe tires, includingthe spare wheel.
Excessively high tire pressure canresult in:
RIncreased braking distance
RImpaired handlingcharacteristics
RIrregularwear
386Wheels and tires

The systemchecksthe tire pressure andthe tiretemperature ofthe tires installed onthevehiclebymeans of a tire pressuresensor.
New tire pressure sensors, e.g. in winter tires,are automaticallytaught-in duringthefirst jour‐neytheyare used.
The tire pressure andthe tiretemperatureappear inthe multifunction display(→page 390).
Ifthere is a substantial pressure loss or ifthetiretemperature isexcessive,you will bewarnedinthefollowingways:
Rvia display messages (→page 460)
Rviathewwarning lamp inthe instrumentcluster (→page 484)
The tire pressuremonitoring system is only anaid. It isthe driver'sresponsibilitytosetthe tirepressuretotherecommended cold tire pressuresuitableforthe operating situation. Setthe tirepressurefor cold tires using a tire pressuregauge.Notethatthe correct tire pressureforthecurrent operating situation mustfirst betaught-intothe tire pressure monitoring system.
In most cases,the tire pressure monitoring sys‐tem will automaticallyupdatethe newreferencevalues afteryou havechangedthe tire pressure.You can, however,also updatethereferenceval‐uesbyrestartingthe tire pressure monitoringsystem manually (→page 391).
System limitations
The system may be impaired or may not functioninthefollowing situations:
RIfthe tire pressure is set incorrectly
RIfthere is a sudden pressure loss caused,forexample,byaforeign object penetratingthetire
RIfthere is a malfunction causedbyanotherradio signal source
Make suretoobservethefollowing furtherrela‐ted subject:
RNotes on tire pressure (→page 386)
Checkingthe tire pressure withthe tire pres‐sure monitoring system
Requirements:RThe ignition is switched on.
On-board computer:
Service Tires
One ofthefollowing displaysappears:
RCurrent tire pressure and tiretemperature ofthe individual wheels:
RTire pressure will be displayed after driving afew minutes
RTire Pressure Monitor Active:theteach-inprocess ofthe system is notyet complete.The tire pressures are already being moni‐tored.
Comparethe tire pressure withtherecom‐mended tire pressureforthe current operat‐
390Wheels and tires

ing condition (→page 387). Observethenotes on tiretemperature (→page 386).
Thevalues displayed inthe multifunction dis‐play may deviate fromthose ofthe tire pres‐suregauge astheyrefertosea level.Athighaltitudes,the tire pressurevalue indicatedbya pressuregauge are higherthanthoseshownbythe on-board computer. Inthiscase, do notreducethe tire pressure.
Make suretoobservethefollowing furtherrela‐ted subject:
RNotes on tire pressure (→page 386)
Restartingthe tire pressure monitoring sys‐tem
Requirements:RTherecommended tire pressure is correctlysetfortherespective operatingstatus oneach ofthefour wheels (→page 386).
Restartthe tire pressure monitoring system inthefollowing situations:
RThe tire pressure haschanged.
RThe wheels or tires havebeenchanged ornewly installed.
On-board computer:
Service Tires
Swipe downwards onTouch Control ontheleft-hand side ofthesteering wheel.TheUse Current Pressures as New Refer-ence Values?message is shown inthe multi‐function display.
Tobeginrestart, pressTouch Control ontheleft-hand side ofthesteering wheel.TheTire Press. Monitor Restartedmessage isshown inthe multifunction display.
Currentwarning messages are deleted andtheyellowwwarning lamp goes out.
Afteryou havebeen drivingfor afewminutes,the systemcheckswhetherthe cur‐rent tire pressures are withinthe specifiedrange. The current tire pressures arethenaccepted asreferencevalues and monitored.
Make suretoobservethefollowing furtherrela‐ted subject:
RNotes on tire pressure (→page 386)
Radio equipment approval ofthe tire pres‐sure monitoring system
Radio equipment approval numbers
CountryRadio type approval number
Canada IC: 2546A-AG5SP4
USAFCC ID: MRXAG5SP4
FCC ID: MRXMFR
Further information onthe declaration of con‐formityfor wirelessvehicle components(→page 23).
Tirepressure losswarning system
Function ofthe tire pressure losswarningsystemThe tire pressure losswarning systemwarnsthedriverbymeans of display messages whenthereis a severetire pressureloss.
After achange in tire pressure, a wheelrotationor a tirechange, or ifyou havere-installedwheels or tires,the tire pressure losswarningsystem hastoberestarted (→page 392).
Wheels and tires391

The tire pressure losswarning system does notreplacethe needtoregularlycheckthe tire pres‐sure.
System limitations
The system may be impaired or may not functionparticularlyinthefollowing situations:
RIncorrectly set tire pressure
RSudden pressure loss caused,forexample,byaforeign object penetratingthe tire
RSteady pressure loss in several tires
The system has arestricted or delayed functionparticularly inthefollowing situations:
RPoor ground conditions, e.g. snow or gravel
RDriving withsnowchains
RWhen adopting averysporty drivingstylewith high cornering speeds or sudden accel‐eration
RDriving with a high load
Be suretoalso observethefollowing furtherrelated subjects:
RNotes on tire pressure (→page 386)
RDisplay messages aboutthe tires(→page 460)
Restartingthe tire pressure losswarningsystem
Requirements:RTherecommended tire pressure is correctlysetfortherespective operatingstatus oneach ofthefour wheels (→page 386).
Restartthe tire pressure losswarning system inthefollowing situations:
RThe tire pressure haschanged.
RThe wheels or tires havebeenchanged ornewly installed.
On-board computer:
Service Tires
Swipe downwards ontheTouch Control onthe left-hand side ofthesteering wheel.TheTire Pressure Control SystemActiveRestart: Press Touch Controlmessageis shown inthe multifunction display.
Restartthe tire pressure losswarning system inthefollowing situations:
RThe tire pressure haschanged.
RThe wheels or tires havebeenchanged ornewly installed.
Tobegintherestart, presstheTouch Controlonthe left-hand side ofthesteering wheel.TheTire Pressure Now OK?message isshown inthe multifunction display.
SelectYes.
Toconfirmtherestart, presstheTouch Con‐trol onthe left-hand side ofthesteeringwheel.TheRun Flat Indicator Restartedmessage isshown inthe multifunction display.
Afteryou havedrivenfor afew minutes,thetire pressurelosswarning system monitorsthe set tire pressures of allthe tires.
Be suretoalso observethefollowing furtherrelated subjects:
RNotes on tire pressure (→page 386)
392Wheels and tires

Only use tires, wheels and accessoriesthathavebeenchecked andrecommendedbyMercedes-Benz.
NOTERisktodriving safety fromretrea‐ded tires
Retreaded tires are neithertested norrecom‐mendedbyMercedes-Benz, since previousdamage cannot always be detected onretreaded tires.
Forthisreason driving safety cannot be guar‐anteed.
Do not use used tires ifyou havenoinformation abouttheir previous usage.
NOTEPossible damagetowheels or tireswhen drivingover obstacles
Large wheels havea lower tire section width.The lowerthe tire section width,the greateristherisk of damagetowheels or tires whendrivingover obstacles.
Avoid obstacles or drive particularlycarefully.
NOTEDamagetoelectronic componentparts fromthe use of tire-mountingtools
Vehicles with a tire pressure monitoringsystem:Electronic component parts arelocated inthe wheel.Tire-mountingtoolsshould not be used inthe area ofthevalve.
This couldotherwise damagethe electroniccomponent parts.
Havethe tireschanged at aqualifiedspecialistworkshop only.
NOTEDamagetosummer tires at lowambienttemperatures
Atlow ambienttemperatures,tears couldformwhen driving with summer tires, caus‐ing permanent damagetothe tires.
Attemperatures below 45 °F (7 °C),use M+S tires .
Accessory partsthat are not approvedforyourvehiclebyMercedes-Benz or are not being usedcorrectly can impairthe operating safety.
Before purchasing and using non-approvedaccessories, visit aqualified specialistworkshopand inquire about:
RSuitability
RLegalstipulations
RFactoryrecommendations
\nWARNINGRisk of accident withhighperformance tires
The special tire tread in combination withtheoptimized tire compound meansthattheriskof skidding orhydroplaning onwetroads isincreased.
In addition,the tire grip is greatlyreduced ata low outsidetemperature and tirerunningtemperature.
Switch onthe ESP®and adaptyourdrivingstyle accordingly.
Use M+S tire at outsidetemperaturesof lessthan10°C (50 °F).
406Wheels and tires

Thewear patterns onthe front andrear wheelsdiffer:
RFront wheelswear more onthe shoulder ofthe tire
RRear wheelswear more inthe center ofthetire
Onvehiclesthat havethe same size front andrear wheels,rotatethe wheels accordingtotheintervals inthe tire manufacturer'swarrantybook inyourvehicle documents. Ifthis is notavailable,rotatethe tiresevery3,000to6,000 miles (5,000to10,000 km),depending onthewear. Ensurethatthe directionofrotation is maintained.
It is imperativetoobservethe instructions andsafety notes on "Changing a wheel" when doingso Preparingthevehiclefor a wheelchange(→page 409).
Notes onstoring wheels
Whenstoring wheels, observethefollowingnotes:
RAfterremoving wheels,storethem in a cool,dry and preferably dark place.
RProtectthe tires from contact withoil, greaseor fuel.
Overview ofthe tire-changetool kit
Apart from some country-specificvariants,vehi‐cles are not equipped with a tire-changetool kit.For more information on whichtire-changetoolsarerequired and approvedfor performing awheelchange onyourvehicle, consult aqualifiedspecialistworkshop.
Required tire-changetools may include,forexample:
RJack
RChock
RLug wrench
RAlignment bolt
The tire-changetool kit is located intool bag1.
1Tool bag
Tool bag1contains:
RJack
RGloves
RLug wrench
RAlignment bolt
RFoldingchock
RRatchetfor jack
408Wheels and tires

Setting upthefoldingchock
Preparingthevehiclefor a wheelchange
Requirements:RTherequired tire-changetool isavailable. Ifyourvehicle is not equipped withthe tire-changetool kit, consult aqualified specialistworkshoptofind out about suitabletools.
RThevehicle is not on a slope.
RThevehicle is on solid, non-slippery and levelground.
Applythe electric parking brake manually.
Movethe front wheelstothestraight-aheadposition.
Vehicles with automatic transmission:Shift into position].
Vehicles with level control system:Setthenormalvehicle level (→page192).
Switch offthe engine.
Make surethatthe engine cannotbestarted.
Placechocksorother suitable items underthe front andrear ofthe wheelthat is diago‐nally oppositethe wheelyou wishtochange.
Removethe hub caps if necessary(→page 409).
Raisethevehicle (→page410).
Removing and installing hub caps
Requirements:RThevehicle is preparedfor a wheelchange(→page 409).
Plastic hub cap
Toremove:turnthe center cover ofthe hubcap counter-clockwise andremovethe hubcap.
Toinstall:make surethatthe center cover ofthe hub cap is turned counter-clockwise.
Positionthe hub cap and turnthe centercover clockwise untilthe hub cap engagesphysically and audibly.
Wheels and tires409

Aluminum hub cap
Toremove:position socket2on hub cap1.
The socket can befound inthe tire-changetool kit.
Position wheel wrench3on socket2.
Using wheel wrench3, turn hub cap1counter-clockwise andremoveit.
Toinstall:position hub cap1and turn untilit is completelyflush withthe wheel.
Position socket2on hub cap1.
Attachwheel wrench3tosocket2andtightenthe hub cap clockwise.Specified tighteningtorque:18lb-ft(25 Nm).
Raisingthevehicle whenchanging a wheel
Requirements:RThere are no persons inthevehicle.
RThevehicle has been preparedfor a wheelchange (→page 409).
RThe hub caps havebeenremoved(→page 409).
Important notes on usingthe jack:
RUse onlythevehicle-specific jackthat hasbeentested and approvedbyMercedes-Benztoraisethevehicle.
RThe jack is only designedforraising andholdingthevehiclefor a short time while awheel is beingchanged and notfor mainte‐nanceworkunderthevehicle.
RThe jack must be placed on afirm,flat andnon-slip surface. If necessary,use a large,flat, load-bearing, non-slip underlay.
RThefootofthe jack must be positionedverti‐cally underthe jack support point.
Rules of conduct whenthevehicle israised:
RNever placeyour hands orfeetunderthevehicle.
RNever lie underthevehicle.
RDo notstartthe engine and do notreleasethe electric parking brake.
RDo not open or close any doors orthe trunklid.
41 0Wheels and tires

Usingthe lug wrench, loosenthe wheel boltsonthe wheelyou wishtochangebyaboutone full turn. Do not unscrewthe bolts com‐pletely.
Position of jack support points
\nWARNINGRisk of injuryfrom incorrectpositioning ofthe jack
Ifyou do not positionthe jack correctly atthe appropriate jacking point ofthevehicle,the jack could tip withthevehicleraised.
Only positionthe jack atthe appropri‐ate jacking point ofthevehicle. Thebase ofthe jack must be positionedver‐tically underthe jacking point ofthevehicle.
NOTEVehicle damage fromthe jack
Ifyou do not positionthe jack correctly atthe appropriate jack support point ofthevehicle,the jack could tipover withthevehi‐cleraised.
The jack is designedexclusivelyforjacking upthevehicle atthe jack sup‐port points.
Taketheratchet out ofthe tire-changetoolkit and place it onthe hexagon nut ofthejack sothatthe letters "AUF" are visible.
Wheels and tires411

\nWARNINGRisk of accident from losing awheel
Oiled, greased or damaged wheel bolt/wheelnutthreads or wheel hub/wheel mountingboltthreads can causethe wheel bolts/wheel nutstocome loose.
As aresult,you could lose a wheel while driv‐ing.
Never oil or greasethethreads.
Intheevent of damagetothethreads,contact aqualified specialistworkshopimmediately.
Havethe damaged wheel bolts or dam‐aged hubthreadsreplaced.
Do not continue driving.
Observethe information onthechoice oftires (→page 405).
For tires with a specified direction ofrotation, anarrowonthe sidewall ofthe tire indicatesthecorrect direction ofrotation. Observethe direc‐tion ofrotation when installing.
Slidethe wheeltobe mounted ontothealignment bolt and push it on.
\nWARNINGRisk of injuryfrom tighteningwheel bolts and nuts
Ifyou tightenthe wheel bolts or wheel nutswhenthevehicle israised,the jack could tip.
Only tighten wheel bolts or wheel nutswhenthevehicle is onthe ground.
Be suretoobservethe instructions andsafety notes on "Changing a wheel"(→page 405).
For safetyreasons, onlyuse wheel boltswhich havebeen approvedbyMercedes-Benz andforthe wheel inquestion.
NOTEDamagetopaintwork ofthe wheelrim when screwing onthefirst wheel bolt
Ifthe wheel hastoo much play when screw‐ing inthefirst wheel bolt,the wheelrim paintcan be damaged.
Pressthe wheelfirmlyagainstthewheel hub when screwing onthefirstwheel bolt.
Tightenthe wheel boltsevenly in a diagonalpattern inthe order indicated untiltheyarefinger-tight.
Unscrewthe alignment bolt.
Tightenthe last wheel bolt until it isfinger-tight.
Lowerthevehicle (→page413).
Loweringthevehicle after a wheelchange
Requirements:RThe new wheel has been installed(→page412).
Placetheratchet ontothe hexagon nut ofthejack sothatthe letters "AB" are visible.
Tolower thevehicle:turntheratchet ofthejack counter-clockwise.
Wheels and tires413