ignition MERCEDES-BENZ C CLASS 2019 Service Manual

ROil leveltoo high: oil level is above2.
Ifthe oil level istoo low,add1.1 US qt(1 liter) of engine oil.
Ifthe oil level istoo high, drain offexcessengine oil. Consult aqualified specialistworkshop.
Checkingthe engine oil level usingthe on-board computer
RequirementsThe engine must havean oil level sensor. If not,the engine oil level can bechecked only withtheoil dipstick (page 354).
The engine oil level is determined during driving.Determiningthe engine oil level cantakeupto30 minutes with a normal drivingstyle andevenlonger with an active drivingstyle.
In ordertoreceivearesult asquickly as possi‐ble:
RWarmupthe engine
RParkthevehicle on a level surface
RLeavethe enginerunning at idling speed
On-board computer:
ServiceEngine Oil Level
You will see one ofthefollowing messages onthe multifunction display:
RMeasuring Engine Oil Level...: measurementofthe oil level is notyet possible.
Repeattherequest after a maximum of30 minutes driving.
REngine Oil Level OKandthe bar displayforindicatingthe oil level onthe multifunctiondisplay is green and is between "min" and"max":the oil level is correct.
REngine Oil Level Add 1.0 landthe bar displayfor indicatingthe oil level onthe multifunc‐tion display is orange and is below "min":
Add1.1 US qt (1 l) engine oil.
RReduce Engine Oil Levelandthe bar displayfor indicatingthe oil level onthe multifunc‐tion display is orange and is above"max":
Drain offexcess engine oilthat has beenadded. Consult aqualified specialistwork‐shop.
RFor Engine Oil Level Switch Ignition On:
Switch onthe ignitiontocheckthe engine oillevel.
REngine Oil Level System Inoperative: sensorfaulty or not inserted.
Consult aqualified specialistworkshop.
REngine Oil Level System Currently Unavail.:
Closethe hood.
Adding engine oil
\nWARNINGRisk of burns from hot com‐ponent parts inthe engine compartment
Certain components inthe engine compart‐ment can beveryhot, e.g.the engine,theradiator and parts oftheexhaust system.
Allowthe enginetocool down and onlytouch component parts described inthefollowing.
Maintenance and care355

Notes on care ofvehicle parts
\nWARNINGRisk of entrapment ifthewindshield wipers are switched on whilethe windshield is being cleaned
Ifthe windshield wipers are set in motionwhileyou are cleaningthe windshield orwiper blades,you can be trappedbythewiper arm.
Always switch offthe windshield wipersandthe ignition before cleaningthewindshield or wiper blades.
\nWARNINGRisk of burning fromthetail‐pipe ortailpipe trim
Thetailpipe andtailpipe trim can becomeveryhot. Ifyou come into contact withthesecar parts,you could burnyourself.
Always be particularlycareful when inthe vicinity ofthetailpipe andtailpipetrims and supervisechildrenveryclosely when inthis area.
Before any contact, allowthe car partstocool down.
Observethefollowing information:
Notes on cleaning and careAvoidingvehicle damage
Wheels/rimsUsewater and acid-free wheel cleaners.RDo not use acidic wheel cleanerstoremovebrake dust.This could damage wheel bolts and brake components.
RToavoid corrosion ofthe brake discs and brakepads, drivethevehiclefor afew minutes after cleaning before parkingit. The brake discs and brakepadswarmup and dry out.
WindowsClean windowsinside and outside with a damp clothand witha cleaning agentrecommendedfor Mercedes-Benz.Do not use dry cloths or abrasive or solvent-based cleaningagentstocleanthe inside of windows.
Wiper bladesFold outthe wiper blades and cleanthem using a damp cloth.Do not cleanthe wiper bladestoo often.
364Maintenance and care

Affix part1ofthe TIREFITstickertotheinstrument cluster withinthe driver'sfield ofvision.
Affix part2ofthe TIREFITsticker nearthevalve onthe wheel withthefaulty tire.
Pull plug4withthe cable and hose5outofthe tire inflation compressor housing.
Pushthe plug of hose5intoflange6oftire sealant bottle1untilthe plug engages.
Place tire sealant bottle1head downwardsintorecess2ofthe tire inflation compres‐sor.
Removethe cap fromvalve7onthefaultytire.
Screwfilling hose8ontovalve7.
Insert plug4into a12V socket inyourvehicle.
Switch onthe ignition.
Press on and off switch3onthe tire infla‐tion compressor.The tire inflation compressor is switched on.The tire is inflated. First, tire sealant is pum‐ped intothe tire. The pressure may brieflyrisetoapproximately 500 kPa (5 bar/73 psi).
Do not switch offthe tire inflation compres‐sor duringthis phase.
Letthe tire inflation compressorrunfor amaximum often minutes.The tire shouldthen haveattained a tirepressure of at least 200 kPa (2.0 bar/29 psi).
If tire sealant leaks out, make sureyou cleantheaffected area asquickly as possible. It is prefera‐bletouse clearwater.
Ifyouget tire sealant onyour clothing, haveitcleaned as soon as possible with perchloroethy‐lene.
Breakdown assistance373

Ifthe indicator/warning lamps inthe instrumentcluster do not light up at lowtemperatures, it isverylikelythatthe discharged battery has fro‐zen. Inthis caseyou may neither jump-startthevehicle norchargethe battery.
The service life of a batterythat has beenthawed may be dramatically shortened. Thestartingcharacteristics may be impaired, espe‐cially at lowtemperatures.
It isrecommendedthatyou haveathawed bat‐terychecked at aqualified specialistworkshop.
AllvehiclesPlug-inhybrid:observethe notes inthe Supple‐ment. Otherwise,you mayfailtorecognize dan‐gers.
NOTEDamagecausedbynumerous orextended attemptstostartthe engine
Numerous orextended attemptstostarttheengine may damagethe catalytic converterduetonon-combusted fuel.
Avoid numerous andextended attemptstostartthe engine.
Observethefollowing points duringstartingassistance and whenchargingthe battery:
ROnly use undamaged jumper cables/charg‐ing cables with a sufficient cross-section andinsulatedterminal clamps.
RNon-insulated parts oftheterminal clampsmust not come into contact withother metalparts whilethe jumper cable/charging cableis connectedtothe battery/jump-startcon‐nection point.
RThe jumper cable/charging cable must notcome into contact withany parts which maymovewhenthe engine isrunning.
RAlways make surethat neitheryou northebattery is electrostaticallycharged.
RKeepawayfromfireand openflames.
RDo not leanoverthe battery.
Observethe additionalfollowing points whenchargingthe battery:
ROnly use batterychargerstested andapprovedfor Mercedes-Benz.
RReadthe batterycharger's operating instruc‐tions beforechargingthe battery.
Observethe additionalfollowing points duringstarting assistance:
RStarting assistance may only be providedusing batteries with a nominalvoltage of12V.
RThevehicles must nottouch.
RGasoline engine:Onlyacceptstarting assis‐tance ifthe engine andexhaust system arecold.
Starting assistance andchargingthe12 Vbattery
Requirements:RThevehicle is secured withthe electric park‐ing brake.
RAutomatic transmission:The transmissionis in position].
RThe ignition and all electrical consumers areswitched off.
RThe hood is open.
Breakdown assistance37 9

NOTEDamagedueto towingawayatexcessively high speeds orover long dis‐tances
The drivetrain could be damaged whentow‐ing atexcessively high speeds orover longdistances.
Atowing speed of 30mph (50 km/h)must not beexceeded.
Atowing distance of 30 miles (50 km)must not beexceeded.
\nWARNINGRisk of accident whentowingavehicle which istoo heavy
Ifthevehicle beingtow-started ortowedawayis heavierthanthe permissible grossmass ofyourvehicle,thefollowing situationscan occur:
RThetowingeye may become detached.
RThevehicle/trailer combination mayswerveorevenoverturn.
If anothervehicle istow-started ortowedaway, itsweight must notexceed
the permissible gross mass ofyourownvehicle.
If avehicle must betowstarted ortowedaway,its permissible gross mass must notexceedthepermissible gross mass ofthetowingvehicle.Information onthe permissible gross mass ofthevehicle can befound onthevehicle iden‐tification plate (page 423).
Vehicles with automatic transmission:Donot openthe driver's door or front passengerdoor,otherwisethe automatic transmissionautomatically shiftstoposition].Installingthetowingeye (page 385).
Fastenthetow bar.
NOTEDamageduetoincorrect connec‐tion
Only connectthetowrope ortow bartothetowingeyes.
Deactivatingthe automatic locking mecha‐nism (page71).
Do notactivatethe HOLD function.
DeactivateActive Brake Assist(page181).
Vehicles with automatic transmission:Shiftthe automatic transmissiontoposition\\.
Releasethe electric parking brake.
\nWARNINGRisk of accident duetolimi‐ted safety-related functions duringthetowing process
Safety-related functions are limited or no lon‐geravailable inthefollowing situations:
Rthe ignition is switched off.
Rthe brake system or powersteering sys‐tem is malfunctioning.
Rthe energy supply orthe on-board electri‐cal system is malfunctioning.
Whenyourvehicle isthentowedaway, signif‐icantly more effortmay berequiredtosteerand brakethan is normallyrequired.
Use atow bar.
Breakdown assistance383

RAll electrical consumers are switched off
RThe ignition is switched off
The electrical fuses are located invarious fuseboxes:
RFuse box inthe engine compartment onthedriver's side (page 387)
RFuse box onthe driver's side ofthe cockpit(page 388)
RFuse box inthe front passengerfootwell(page 388)
RFuse box inthe trunk ontheright-hand sideofthevehicle when viewed inthe direction oftravel (page 388)
Opening and closingthe fuse box intheengine compartment
Requirements:RA dry clothand a screwdriver areavailable.
Observethe notes on electrical fuses(page 386).
Opens
\nWARNINGRisk of injuryfrom usingthewindshield wipers whilethe engine hoodis open
Whenthe engine hood is open andthe wind‐shield wipers are set in motion,you can betrappedbythe wiper linkage.
Always switch offthe windshield wipersand ignition before openingthe enginehood.
Turnclip2on cover1aquarter-turncounter-clockwise.
Fold cover1up inthe direction ofthearrow.
Breakdown assistance387

allowthe TPMStocontinuetofunction prop‐erly.
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 396).
Ifthere is a substantial pressure loss or ifthetiretemperature isexcessive,you will bewarnedinthefollowingways:
Rvia display messages (page 466)
Rviathewwarning lamp inthe instrumentcluster (page 490)
The tire pressuremonitoring system is only anaid. It isthe driver'sresponsibilitytosetthe tirepressuretotherecommended cold tire pressuresuitableforthe operating situation. Setthe tirepressurefor cold tires using a tire pressure
gauge.Notethatthe correct tire pressureforthecurrent operating situation mustfirst betaught-intothe tire pressure monitoring system.
In most cases,the tire pressure monitoring sys‐tem will automatically updatethe newreferencevalues afteryou havechangedthe tire pressure.You can, however,also updatethereferenceval‐uesbyrestartingthe tire pressure monitoringsystem manually (page 397).
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 392)
Checkingthe tire pressure withthe tire pres‐sure monitoring system
Requirements:RThe ignition is switched on.
On-board computer:
ServiceTires
One ofthefollowing displaysappears:
RCurrent tire pressure and tiretemperature ofthe individual wheels:
RTire pressure will be displayed after driving afew minutes
396Wheels and tires

Operatingfluids
Notes on operatingfluids
Mercedes-AMGvehicles:be suretoobservethe information inthe Supplement. Otherwise,you mayfailtorecognize dangers.
\nWARNINGRisk of injuryfrom operatingfluids harmfulto your health
Operatingfluids may be poisonous and harm‐fulto your health.
Observethetext onthe original con‐tainers when using,storing or disposingof operatingfluids.
Alwaysstore operatingfluids sealed intheir original containers.
Alwayskeepchildrenawayfrom operat‐ingfluids.
ENVIRONMENTALNOTEEnvironmentalpollution causedbyenvironmentally irre‐sponsible disposal
Dispose of operatingfluids in an envi‐ronmentallyresponsible manner.
Operatingfluids includethefollowing:
RFuels
RLubricants
RCoolant
RBrakefluid
RWindshieldwasherfluid
RClimate control systemrefrigerant
Only use products approvedbyMercedes-Benz.Damage causedbythe use of productsthat havenot been approved is not coveredbytheMercedes-Benzwarranty or goodwillgestures.
You can identify operatingfluids approvedbyMercedes-Benzbythefollowing inscriptions onthe container:
RMB-Freigabe (e.g. MB-Freigabe 229.51 )
RMB-Approval (e.g. MB-Approval 229.51)
Further information on approved operatingfluidsisavailable atthefollowing locations:
Rinthe Mercedes-Benz SpecificationsforOperating Fluidsbyenteringthe designation
-at http://bevo.mercedes-benz.com
-inthe Mercedes-Benz BeVo App
Rat aqualified specialistworkshop
\nWARNINGRisk offireorexplosion fromfuel
Fuels are highlyflammable.
Fire, openflames, smoking and creationof sparksmust beavoided.
Switchoffthe ignition and, ifavailable,thestationary heater, before and whilerefuelingthevehicle.
\nWARNINGRisk of injuryfrom fuels
Fuels are poisonous and hazardousto yourhealth.
Technical data425

Do not swallow fuel or let it come intocontact withskin,eyes or clothing.
Do not inhale fuelvapor.
Keepchildrenawayfrom fuel.
Keep doors and windowsclosed duringtherefueling process.
Ifyou orother people come into contact withfuel, observethefollowing:
Immediatelyrinse fuel offyour skin withsoap andwater.
If fuel comes into contact withyoureyes, immediatelyrinsethemthor‐oughly with cleanwater.Seek medicalattention immediately.
Ifyou swallow fuel, seek medical atten‐tion immediately.Do not inducevomit‐ing.
Change immediately out of clothingthathas come into contact withfuel.
Fuel
Notes on fuelgradesforvehicles with agas‐oline engineObservethe notes on operatingfluids(page 425).
NOTEDamagecausedbythe wrong fuel
Even small amounts ofthe wrong fuel couldresult in damagetothe fuel system,theengine andthe emission control system.
Onlyrefuel with low-sulfur unleadedfuel.
This fuel may contain upto10%ethanolbyvolume.Yourvehicle is suitablefor use withE10 fuel.
Neverrefuel with one ofthefollowing fuels:
RDiesel
RGasoline with morethan10%ethanolbyvolume, e.g. E15, E85, E100
RGasoline with morethan 3% methanolbyvolume, e.g. M15, M30, M85, M100
RGasoline with additives containing metal
Ifyou haveaccidentallyrefueled withthewrong fuel:
Do not switchonthe ignition.
Consult aqualified specialistworkshop.
Iftheavailable fuel is not sufficiently low in sul‐fur,this can produce unpleasant odors.
Onlyrefuel with fuelthat has at leastthe octanenumber specified inthe instruction label inthefuelfillerflap (page159).
Ifyouwant maximum engine output:onlyrefuel with unleaded premium gradegasolinewith an octane number of at least91AKI/95RON.
As atemporary measure, iftherecommendedfuel is notavailable,you may alsorefuel withunleadedregulargasoline with at least87AKI/91RON. This mayreduce engine output andincrease fuel consumption.
Neverrefuel usinggasoline with aneven lowerRON.
426Technical data

Display messagesPossible causes/consequences andPPSolutions
$
(Canada only)
Turn On the Ignition toRelease the Parking Brake
I
(USA only)
$
(Canada only)
Parking Brake See Opera-tor's Manual
*Theyellow$indicator lamp is lit. The electric parking brake is malfunctioning.
Toapply:
Switch offthe ignition and switch it back on.
Applythe electric parking brake manually (page169).
If it isnot possibletoapplythe electric parking brake:
Visit aqualified specialistworkshop.
Where necessary,also safeguardthe parkedvehicle againstrollingaway.Theyellow$andtheredI(USA only) or$(Canada only) indicator lamps are lit. The electric parkingbrake is malfunctioning.
Torelease:
Switchoffthe ignition and switch it back on.
Releasethe electric parking brake manually (page169).
Displaymessages andwarning/indicator lamps435