brakes MERCEDES-BENZ C CLASS 2019 Owners Manual

QR codeforrescue card
The QR code is secured inthe fuelfillerflap andonthe opposite side onthe B-pillar. Intheeventof an accident,rescue services can usethe QRcodetoquicklyfindthe appropriaterescue cardforyourvehicle. The currentrescue card con‐tainsthe most important information aboutyourvehicle in a compactform, e.g.therouting oftheelectric lines.
Further information can be obtained at http://www.mercedes-benz.de/qr-code.
Datastorage
Electronic control units
Electronic control units are installed inyourvehi‐cle. Some ofthese are necessaryforthe safeoperation ofyourvehicle, while some assistyouwhen driving (driver assistance systems). Inaddition,yourvehicle provides comfortandentertainment functions, which are also madepossiblebyelectronic control units.
Electronic control units contain datamemorieswhichcantemporarily or permanentlystore
technical information aboutthevehicle's operat‐ingstate, component loads, maintenancerequirements andtechnicalevents or malfunc‐tions.
Ingeneral,this information documentsthestateof a component part, a module, a system orthesurroundings such as:
Roperatingstatus of system components (e.g.fill levels, batterystatus, tire pressure)
Rstatus messages concerningthevehicle orits individual components (e.g. number ofwheelrevolutions/speed, longitudinal accel‐eration, lateral acceleration, display offas‐tened seat belts)
Rmalfunctions orfaults in important systemcomponents (e.g. lights, brakes)
Rinformation onevents leadingtovehicledamage
Rsystemreactions in special driving situations(e.g. airbag deployment, intervention ofsta‐bility control systems)
Rambient conditions (e.g.temperature,rainsensor)
In additiontoprovidingthe actual control unitfunction,this data assiststhe manufacturer indetecting andrectifying malfunctions and opti‐mizingvehicle functions. The majority ofthisdata istemporary and is only processed inthevehicle itself. Only a small portion ofthe data isstored intheevent or malfunction memory.
Whenyourvehicle is serviced,technical datafromthevehicle can beread outbyservice net‐workemployees (e.g.workshops, manufactur‐ers) orthird parties (e.g. breakdown services).Services includerepair services, maintenanceprocesses,warranty claims andquality assur‐ance measures,forexample. Theread out is per‐formed viathe legally prescribed portforthediagnostics connection inthevehicle. Therespective service network locations orthirdparties collect, process and usethe data. Theydocumenttechnicalstatuses ofthevehicle,assist infinding malfunctions and improvingquality and are transmittedtothe manufacturer,if necessary.Furthermore,the manufacturer issubjecttoproduct liability.Forthis,the manu‐facturerrequirestechnical datafromvehicles.
28General notes

If ABS intervenes when braking,you willfeel apulsing inthe brake pedal. The pulsating brakepedal can be an indication of hazardousroadconditions and can serveas aremindertotakeextra care while driving.
System limitationsRABS is active from speeds of approx. 5mph(8 km/h).
RABS may be impaired or may not function if amalfunction has occurred andtheyel‐low%ABSwarning lamp lights up contin‐uously inthe instrument cluster aftertheengine isstarted.
Function ofBAS (Brake Assist System)
\nWARNINGRisk of an accident causedbya malfunction inBAS (Brake AssistSys‐tem)
IfBAS is malfunctioning,the braking distancein an emergency braking situation isincreased.
Depressthe brake pedal with fullforcein emergency braking situations. ABSpreventsthe wheels from locking.
BAS supportsyour emergency braking situationwith additional brakeforce.
Ifyou depressthe brake pedalquickly,BAS isactivated:
RBAS automaticallybooststhe brake pres‐sure.
RBAS can shortenthe braking distance.
RABS preventsthe wheels from locking.
The brakes will function as usual onceyoureleasethe brake pedal.BAS is deactivated.
Function of ESP®(ElectronicStability Pro‐gram)
\nWARNINGRisk of skidding if ESP®ismalfunctioning
If ESP®is malfunctioning, ESP®cannot carryoutvehiclestabilization. In addition,otherdriving safety systems are switched off.
Drive on carefully.
HaveESP®checked at aqualified spe‐cialistworkshop.
\nWARNINGRisk of skidding if ESP®isdeactivated
Ifyou deactivate ESP®, ESP®cannot carryoutvehiclestabilization.
ESP®should onlybe deactivated inthefollowing situations.
Mercedes‑AMGvehicles:always observethenotes inthe Supplement. Otherwise,you mayfailtorecognize dangers.
17 2Driving and parking

1Cruise control is selected
2Speed is saved, cruise control is deactivated
3Speed is saved, cruise control is activated
The segments betweenthestored speed andthe end ofthe segment display light up inthe speedometer.
System limitationsCruise control may be unabletomaintainthestored speed on uphill gradients. Thestoredspeed isresumed whenthe gradientevens out.
Change into a lowergear in good time on longandsteep downhill gradients.Takeparticularnoteofthis when driving a ladenvehicle. By
doing so,you will make use ofthe engine's brak‐ing effect. Thisrelievesthe load onthe brakesystem and preventsthe brakes fromoverheat‐ing andwearingtooquickly.
Do not use cruise control inthefollowing situa‐tions:
RIn traffic situations whichrequire frequentchanges of speed, e.g. in heavy traffic, onwindingroads.
ROn slipperyroads.Accelerating can causethe drive wheelstolose traction andthevehicle couldthen skid.
RIfyou are driving when visibility is poor.
Operating cruise control
\nWARNINGRisk of accident duetostoredspeed
Ifyou call upthestored speed andthis islowerthanyour current speed,thevehicledecelerates.
Takeinto accountthe traffic situationbefore calling upthestored speed.
Requirements:RESP®must be activated, but not intervening.
RThe driven speed is at least15mph(20 km/h).
RThe transmission is in position[.
Toactivate cruise control:pressrockerswitch1up.
18 2Driving and parking

Toactivate cruise control:pressrockerswitch2up (SET+) or down (SET-).The current speed isstored and maintainedbythevehicle whenyoutakeyourfootoffthe accelerator pedal.
or
Pressrocker switch3up (RES).The laststored speed is called up and main‐tainedbythevehicle.
Ifthe laststored speed has previously beendeleted,the currently driven speed isstored.
Whenyou switchoffthevehicle,the lastspeedstored is cleared.
Toincrease/reduce speed:pressrockerswitch2up/downtothe pressure point.Thestored speed is increased orreducedby1mph (1km/h).
or
Pressrocker switch2beyondthe pressurepoint.Thestored speed is increased orreducedby5mph (10 km/h).
or
Acceleratethevehicletothe desired speed.
Pressrocker switch2up.If cruise control is activated andTraffic SignAssisthas detected a speedrestriction sign witha maximum permissible speed andthis is dis‐played inthe instrument cluster:
Toadoptthe detected speed:pressrockerswitch3up.The maximum permissible speed shownbythe traffic sign isstored andthevehiclemaintainsthis speed.Todeactivate cruise control:pressrocker switch3down (CNCL).
Todeactivate cruise control:pressrockerswitch1down.
Ifyou brake, deactivate ESP®or if ESP®
intervenes, cruise control is deactivated.Whenyou switchoffthevehicle,the lastspeedstored is cleared.
Active Distance Assist DISTRONIC
Function ofActive Distance AssistDISTRONIC
Active Distance AssistDISTRONIC maintainstheset speed on free-flowingroads. Ifvehicles infront are detected,the set distance is main‐tained, if necessary,untilthevehicle comesto ahalt. Thevehicle accelerates or brakes depend‐ing onthe distancetothevehicle in front andthe set speed. The speed and distancetothevehicle in front are set and saved onthesteeringwheel onvehicles withoutthe Driving AssistancePackage, intherange between15mph(20 km/h) and120mph (200 km/h) and, on
Driving and parking18 3

Always carefully observethe traffic con‐ditions and bereadytobrake at alltimes.
Takeinto accountthe traffic situationbefore calling upthestored speed.
\nWARNINGRisk of accident duetoinsuf‐ficient decelerationbyActive DistanceAssistDISTRONIC
Active Distance AssistDISTRONIC brakesyourvehicle with upto50% ofthe maximumpossible deceleration. Ifthis deceleration isnot sufficient,Active Distance AssistDISTRONIC alertsyou with a visual andacousticwarning.
Inthese cases, adjustyour speed andkeep a sufficient distance.
Brakethevehicleyourself and/ortakeevasive action.
\nWARNINGRisk of accident if detectionfunction ofActive Distance AssistDISTRONIC is impaired
Active Distance AssistDISTRONIC does notreact or has a limitedreaction:
Rwhen driving on a different lane or whenchanging lanes
Rtopedestrians, animals, bicycles orsta‐tionaryvehicles, or unexpected obstacles
Rtocomplextraffic conditions
Rtooncomingvehicles and crossing traffic
As aresult,Active Distance AssistDISTRONIC may neither givewarnings norintervene in suchsituations.
Always observethe traffic conditionscarefully andreact accordingly.
OperatingActive Distance Assist DISTRONIC
Requirements:RThevehicle has beenstarted.
RThe electric parking brake isreleased.
RESP®is activated and is not intervening.
RThe transmission is in position[.
RAllthe doors are closed.
RCheck oftheradar sensor system has beensuccessfully completed (vehicle travelingfasterthan12mph (20 km/h)).
RParking AssistPARKTRONIC is not beingusedtoparkthevehicle ortoexit from aparking space.
RThevehicle does not skid.
Driving and parking18 5

NOTEDamagefrom automatic braking
If one ofthefollowing functions is switchedon,thevehicle brakes automatically in cer‐tain situations:
RActive Brake Assist
RActive Distance AssistDISTRONIC
RHOLD function
RActiveParking Assist
Toavoid damagetothevehicle, deactivatethese systems inthefollowing or similar sit‐uations:
Duringtowing
In a carwash
Requirements:RThevehicle isstationary.
RThe driver's door is closed orthe seat belt onthe driver's side isfastened.
RThe engine isrunning or has been automati‐cally switched offbythe ECOstart/stopfunction.
RThe electric parking brake isreleased.
RActive Distance AssistDISTRONIC is deacti‐vated.
RThe transmission is in position[,^or\\.
Activating the HOLD function
Depressthe brake pedal and after a shorttimequickly depress further untilthe

RIfthe maneuvering assistance function isactivated inthe multimedia system.
System limitationsDriveAwayAssistis notavailable on inclines.
Function of CrossTraffic Alert
Alsoreadthe instructions on Blind SpotAssist (page219).
Vehicles with Blind Spot Assist:drivers canalso bewarned of any crossing traffic whenbacking up out of a parking space. If a criticalsituation is detected, symbol1appearsinthemultimedia system display.Ifthe driver does notrespondtothewarning,thevehicle's brakes canbe applied automatically.Todothis,the functionusestheradar sensors inthe bumper. The areaadjacenttothevehicle is continually monitored.
Iftheradar sensors are obstructedbyvehiclesorother objects, detection is not possible.
The CrossTraffic Alert function is activeunderthefollowing conditions:
RIf Blind Spot Assist is activated.
RIfthevehicle is backing up atwalking pace.
RIfthe maneuvering assistance function isactivated inthe multimedia system.
System limitationsThe CrossTraffic Alert function is notavailableon inclines.
Deactivating/activating maneuvering assis‐tanceMultimedia system:
VehiclekAssistanceCamera & ParkingManeuvering Assist.
Activatesor deactivateSthe function.
Maneuvering assistance mustbe activeforthe function of DriveAwayAssist(page214) and CrossTraffic Alert(page215).
ATTENTION ASSIST
Function ofATTENTION ASSISTATTENTION ASSIST assistsyou on long, monoto‐nous journeys, e.g. on highways and trunkroads.IfATTENTION ASSIST detects indicators offati‐gue or increasing lapses in concentration onthepart ofthe driver, it suggeststaking a break.
ATTENTION ASSIST is only an aid. It cannotalways detectfatigue or lapses in concentrationin time. The system is not a substitutefor awell-rested and attentive driver. On long journeys,
Driving and parking215

fied onthevehicle identification plate ontheB‑pillar onthe driver's side.
Maximumweight ofthe ladenvehicle:themaximumweight isthe sum ofthe curbweightofthevehicle,theweight ofthe accessories,themaximum load andtheweight of optional equip‐ment installed atthefactory.
Kilopascal (kPa):metric unitfor tire pressure.6.9 kPa correspondsto1 psi. Another unitfortire pressureis bar.100 kilopascal (kPa) equals1 bar.
Load index:in additiontothe load-bearingindex,the load index may also be imprinted onthe sidewall ofthe tire. This specifiesthe load-bearing capacity ofthe tire more precisely.
Curbweight:theweight of avehicle withstand‐ard equipment includingthe maximum capacityof fuel, oil and coolant. It also includesthe airconditioning system and optional equipment ifthese 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 hourswithout 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 wheel
rim. 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.
41 0Wheels and tires

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.
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.
\nWARNINGRisk 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
\nWARNINGRisk 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
Wheels and tires411

Notes onrotating wheels
\nWARNINGRisk 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.
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'swarranty
book 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(page415).
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
Mercedes-AMGvehicles:observethe notes inthe Supplement. Otherwise,you mayfailtorec‐ognize dangers.
Apartfrom 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.
Yourequirethefollowingtools,for instance,tochange a wheel:
RJack
RChock
RLug wrench
RAlignment bolt
The tire-changetool kit is located underthetrunkfloor.
414Wheels and tires