2019 MERCEDES-BENZ S CLASS tire type

Preceding letter11:RWithout: passengervehicle tires accordingtoEuropean manufacturingstandards.
R"P": passengervehicle tires accordingtoUSmanufacturingstandards.
R"LT": light truck tires accordingtoUS manu‐facturingstandards.
R"T": compact emergency sparewheels withhigh tire pressurethat are only designedfortemporary use in an emergency.
Aspectratio33:Ratio between tire height and tire width in per‐cent (tireheight dividedbytire width).
Tire code44(tiretype):R"R"radial tire
R"D": bias ply tire
R"B": bias belted tires
R"ZR":radial tire with a maximum speed above149mph (240 km/h) (optional)
Rim diameter55:The diameter ofthe bead seat (notthe diameteroftherimflange). Therim diameter is specifiedin inches (in).
Load-bearing index66:Numerical codethat specifiesthe maximumload-bearing capacity of a tire (e.g. "91" corre‐spondsto1356 lbs (615kg)).
The load-bearing capacity ofthe tire must be atleast halfthe permissible axle load ofyourvehi‐cle. Do notoverloadthe tiresbyexceedingthespecified load limit.
See also:
RMaximum permissible load ontheTireandLoading Information placard (→page442)
RMaximum tire load (→page448)
RLoad index
Speedrating77:Specifiesthe approved maximum speed ofthetire.
%An electronic speed limiter preventsyourvehicle fromexceeding a speed of130mph(210km/h).
Makesurethatyour tires havetherequiredspeedrating.You can obtain information ontherequired speedrating from an authorizedMercedes-Benz Center.
Summer tires
IndexSpeedrating
Qupto100mph (160 km/h)
Rupto106mph (170 km/h)
Supto112mph (180 km/h)
Tupto118mph (190 km/h)
Hupto130mph (210km/h)
Vupto149mph (240 km/h)
Wupto168mph (270 km/h)
Yupto186mph (300 km/h)
450Wheels and tires

these are installed onthevehicle, but does notinclude passengers or luggage.
Maximum tire load:the maximum tire load isthe maximum permissibleweight in kilograms orlbsfor whicha tire is approved.
Maximum permissible tire pressure:maxi‐mum permissible tire pressurefor one tire.
Maximum load on one tire:maximum load onone tire. This is calculatedbydividingthe maxi‐mum axle load of one axlebytwo.
PSI (pounds per square inch):standard unit ofmeasurementfor tire pressure.
Aspectratio:ratio between tire height and tirewidth in percent.
Tirepressure:pressure insidethe tire applyingan outwardforcetoeverysquare inch ofthe tire.The tire pressure is specified in pounds persquare inch (psi), in kilopascals (kPa) or in bar.The tire pressure should only be corrected whenthe tires are cold.
Cold tire pressure:the tires are cold whenthevehicle has been parkedfor at least3 hours
without direct sunlight onthe tires orthevehiclehas been drivenfor lessthan 1 mile (1.6 km).
Tirecontact surface:the part ofthe tirethatcomes into contact with theroad.
Tirebead:the purpose ofthe tire bead istoensurethatthe tire sits securely onthe wheelrim. There are several wire cores inthe tire beadtopreventthe tire fromchanging length onthewheelrim.
Sidewall:the part ofthe tire betweenthe treadandthe tire bead.
Weight of optional equipment:the combinedweight ofthe optional equipmentweighing morethanthereplacedstandard parts and morethan5 lbs (2.3kg).This optional equipment, such ashigh-performance brakes, level control system, aroof luggagerackor high-performance batteries,is not included inthe curbweight andtheweightofthe accessories.
TIN (Tire IdentificationNumber):a uniqueidentification number which can be usedby atire manufacturertoidentify tires,forexample,in a productrecall, andthus identifythe pur‐chasers. The TIN is made up ofthe manufactur‐
er's identity code, tire size, tire type code andthe manufacturing date.
Load-bearing index:the load-bearing index is acodethat containsthe maximum load-bearingcapacity of a tire.
Traction:traction isthe gripresulting from fric‐tion betweenthe tires andtheroad surface.
Wear indicator:narrowbars (treadwear bars)that are distributedoverthe tire contact surface.Ifthe tire tread is level withthe bars,thewearlimit of 1/16in (1.6 mm) has beenreached.
Distribution ofvehicle occupants:distributionofvehicle occupantsover designated seat posi‐tions in avehicle.
Maximum permissible payloadweight:nomi‐nal load and luggage load plus150 lb (68kg)multipliedbythe number of seats inthevehicle.
Wheels and tires453

Changing a wheel
Notes on selecting, installing andreplacingtires
Mercedes-AMGvehicles:observethe notes inthe Supplement. Otherwise,you may notrecog‐nize dangers.
You can askfor informationregarding permittedwheel/tire combinations at an authorizedMercedes-Benz Center.
&WARNINGRisk of accident duetoincor‐rect dimensions of wheels and tires
If wheels and tires ofthe wrong size areinstalled,the wheel brakes or wheel suspen‐sion components may be damaged.
#Alwaysreplace wheels and tires withthosethat fulfillthe specifications ofthe original part.
Whenreplacing wheels, make suretofitthecorrect:
RDesignation
RModel
Whenreplacing tires, make suretoinstallthecorrect:
RDesignation
RManufacturer
RModel
&WARNINGRisk of injurythroughexceed‐ingthe specified tire loadrating orthepermissible speedrating
Exceedingthe specified tire loadrating orthe permissible speedrating may leadtotiredamageandtothe tires bursting.
#Therefore, only use tire types and sizesapprovedforyourvehicle model.
#Observethe tire loadrating and speedratingrequiredforyourvehicle.
*NOTEVehicle and tire damagethroughtire types and sizesthat havenot beenapproved
For safetyreasons, onlyuse tires, wheelsand accessories which havebeen speciallyapprovedbyMercedes-Benzforyourvehicle.
These tires are specially adaptedtothe con‐
trol systems, such as ABS, ESP®and4MATIC, and marked asfollows:
RMO = Mercedes-Benz Original
RMOE = Mercedes-Benz Original Extended(run-flat tire onlyfor certain wheels)
RMO1 = Mercedes-Benz Original (only cer‐tain AMG tires)
Certaincharacteristics, such as handling,vehicle noise emissions, fuel consumption,etc. mayotherwise be adversely affected.Furthermore,other tire sizes couldresult inthe tiresrubbing againstthe body and axlecomponents when loaded. This couldresultin damagetothe tire orthevehicle.
454Wheels and tires

Observethefollowing when selecting, installingandreplacing tires:
ROnly use tires and wheels ofthe same type(summer tires, winter tires, MOExtendedtires) andthe same make.
ROnly install wheels ofthe same size on oneaxle (left andright).
It is only permissibletoinstall a differentwheel size intheevent of aflat tire in ordertodrivetothe specialistworkshop.
ROnly install tires ofthe correct size ontothewheels.
RVehicles with a tire pressure monitoringsystem:All installed wheels must be equip‐ped with functioning sensorsforthe tirepressure monitoring system.
RAttemperatures below 45 °F (7 °C), use win‐ter tires or all-season tires marked M+Sforall wheels.
Winter tires bearingtheMsnowflake sym‐bol in additiontothe M+S marking providethe best possible grip in wintryroad condi‐tions.
RFor M+S tires, only use tires withthe sametread.
RObservethe maximum permissible speedforthe M+S tires installed.
Ifthis is belowthevehicle's maximum speed,this must be indicatedbyan appropriatelabel inthe driver'sfield of vision.
RBreak in new tires at moderate speedsforthefirst 60 miles (100 km).
RReplacethe tires after sixyears atthe latest,regardless ofwear.
RWhenreplacing with tires that do notfea‐turerun-flatcharacteristics:vehicles withMOExtended tires are not equipped with aTIREFIT kit atthefactory.Equipthevehiclewith a TIREFIT kit afterreplacing with tiresthat do notfeaturerun-flatcharacteristics,e.g. winter tires.
For more information on wheels and tires, con‐tact aqualified specialistworkshop.
Be suretoalso observethefollowing furtherrelated subjects:
RNotes on tire pressure (→page 435)
RTireand Loading Information placard(→page442)
RTiresize designation, load-bearing capacity,speedrating and load index (→page449)
RTirepressuretable (→page 437)
Notes onrotating wheels
&WARNINGRisk of injurythrough differ‐ent wheel sizes
Interchangingthe front andrear wheels ifthewheels or tires havedifferent dimensionsmay severely impairthe drivingcharacteris‐tics.
The wheel brakes or wheel suspension com‐ponents may also be damaged.
#Rotatefront andrear wheels onlyifthewheels and tires are ofthe same dimen‐sions.
456Wheels and tires

K
KEYLESS-GOLockingthevehicle ................................67Problem .................................................68Unlocking setting .................................. 63Unlockingthevehicle ............................67
Kickdown.................................................180Using ...................................................180
Knee airbag................................................ 38
L
Labeling (tires)seeTirelabeling
Lampsee Interior lighting
Lamps (Instrument Display)seeWarning/indicator lamps
Lane detection (automatic)seeActive LaneKeeping Assist
LaneKeeping AssistseeActive LaneKeeping Assist
Language.................................................293Notes .................................................. 293Setting .................................................293
LATCH-type (ISOFIX)child seat secur‐ing systemInstalling ................................................ 53
Level control systemsee AIRMATICsee MAGICBODYCONTROL
Light switchOverview .............................................145
Lightingsee Interior lightingsee Lights
Lights........................................................14 5Adaptive Highbeam Assist ...................148Adjustingthe instrument lighting ........ 255Automatic driving lights .......................14 6Combination switch.............................14 6Cornering light function .......................14 8Hazardwarning lights ..........................147High beam ...........................................14 6High-beamflasher ...............................146Light switch .........................................14 5
Low-beam headlamps .........................145Parking lights .......................................145Rearfog lamp ......................................14 5Responsibilityfor lighting systems ......14 5Settingtheexterior lighting switch-off delay time ......................................14 9Settingthe surround lighting ...............149Standing lights .....................................145Turnsignals .........................................14 6
LimitedWarrantyVehicle .................................................. 25
LiveTraffic InformationDisplaying subscription information .....318Displayingthe traffic map ....................319Displaying traffic incidents .................. 320Extending a subscription ......................318Issuing hazard alerts ........................... 320
Load index (tires)....................................449
Load-bearing capacity (tires).................449
LoadingDefinitions ...........................................451Notes ...................................................121Roof carrier .........................................12 9Stowage space underthe trunkfloor ...12 9
Index555

Restraint system.......................................31Basic instructionsforchildren ...............47Function in an accident ......................... 32Functionality .......................................... 32Malfunction ........................................... 32Protection ..............................................31Reduced protection ...............................31Self-test ................................................. 32Warning lamp ........................................ 32
ReversegearInserting ..............................................178
Rims (Care).............................................. 409
ROAD SURFACE SCANMultifunction camera .......................... 220
Roadside Assistance.................................21
Roadside Assistance callsee Mercedes me connect
Rollawayprotectionsee HOLD function
Roller sunblindRear window..........................................77Side windows(electric) ..........................76
Roof carrierAttaching .............................................129Loading ................................................12 9
Roof load..................................................476
Route.................................................309,311Activating a commuterroute ................311Calculating .......................................... 309Displaying destination information .......311Displaying destination information(Rear Seat Entertainment) ...................387External ...............................................317Planning ..............................................306Selecting a type .................................. 309Selecting an alternativeroute ..............311Selecting notifications .........................310Selecting options .................................310Startingthe automatic servicesta‐tion search...........................................312Switchingthe automaticgasstationsearchon/off .......................................311Using automaticgasstation search.....311Withintermediate destinations ...........306
Route guidance........................................312Canceling .............................................316Changing direction ...............................313
Destinationreached .............................314From an off-road location ....................316Lanerecommendations .......................314Notes ...................................................312Off-road ...............................................316Toan off-road destination ....................316
Route-based speed adaptationDisplays inthe Instrument Display .......212Function .............................................. 207
Route-based speed adjustmentSetting .................................................208
Run-flatcharacteristicsMOExtended tires ................................414
S
Safety systemssee Driving safety system
Satellite map...........................................326
SatelliteradioActivating/deactivatingTuneStart.......374Adding achanneltoSmartFavorites ...374Deleting achannel ...............................373Displaying EPG information .................373Displaying service information .............375
564Index