2019 MERCEDES-BENZ C CLASS engine oil

Glide mode can also be activated ifyou haveselectedthe "Eco" settingforthe drive inthedrive program=.
Glide mode is deactivated again if one oftheconditions is no longer met.
Glide mode can also be preventedbythefollow‐ing parameters:
RIncline
RDownhill gradient
RTemperature
RHeight
RSpeed
ROperatingstatus ofthe engine
RTraffic situation
Glide mode can be endedbypressingtheright-handsteering wheel paddle shifter(page156).
Problems withthe transmission
ProblemPossible causes/consequences andPPSolutions
The transmission has afaultygearshift. The transmission is losing oil.
Havethe transmissionchecked at aqualified specialistworkshop immediately.
The accelerationcharacteristics aredeteriorating.
The transmission no longer shiftsgear.
The transmission is in emergency operation mode.
It is only possibletoshifttoonegear andreversegear.
Pullover andstopthevehicle safely as soon as possible, paying attentiontoroad and traffic conditions.
Switchthe transmissiontoposition].
Switch offthe engine.
Wait at leastten seconds before restartingthe engine.
15 8Driving and parking

Vehicles withTraffic Sign Assist:Detectedinstructions and traffic signs (page217).
Adjusting the instrument lighting
Turnbrightness control1up or down.The lighting ofthe Instrument Display and inthe control elements ofthevehicle interior isadjusted.
Menus and submenus
Functions onthe service menu ofthe on-board computer
On-board computer:
Service
Toselectthe function:swipe upwards ordownwards onthe left-handTouch Control.
Pressthe left-handTouch Control.
Functions ontheServicemenu:
RMessage memory (page 433)
RTires:
-Restartthe tire pressure losswarningsystem (page 398)
-Checkthe tire pressure withthe tire pres‐sure monitor (page 396)
-Restartthe tire pressure monitor(page 397)
RASSYST PLUS: calls upthe service due date(page 351)
RVehicles with aWidescreen Cockpit:Cool-ant: coolanttemperature display
REngine Oil Level: engine oil level
Calling upthe assistancegraphic
On-board computer:
Assistance
Thefollowing displaysareavailable onthe assis‐tance graphic menu:
RAssistancegraphic
RAttention level (page215)
Toswitch betweenthe displays:swipeupwards or downwards onthe left-handTouch Control.
Instrument Display and on-board computer231

Rfrequent operation in mountainousterrain oron poorroad surfaces
Rwhenthe engine is often leftidlingfor longperiods
Roperation in particularly dusty conditionsand/or if air-recirculation mode is frequentlyused
Inthese or similar operating conditions, havetheinterior airfilter, engine air cleaner, engine oiland oilfilteretc.changed more frequently. Thetires must bechecked more frequently ifthevehicle is operated under increased loads.Fur‐ther information can be obtained at aqualifiedspecialistworkshop.
Battery disconnection periods
The ASSYST PLUS service interval displaycan only calculatethe service due datewhenthe batteryis connected.
Notedownthe service due date displayed onthe instrument display before disconnectingthe battery (page 351).
Engine compartment
Opening/closingthe hood
\nWARNINGRisk of accident ifthe enginehood is unlatched while driving
An unlocked engine hood may open up whenthevehicle is in motion and blockyour view.
Never unlatchthe engine hood whiledriving.
Beforeevery trip, ensurethattheengine hood is latched.
\nWARNINGRisk of accident and injurywhen opening and closingthe enginehood
When opening or closingthe engine hood, itmay suddenly drop intothe end position.
There is arisk of injuryfor anyone intheengine hood'srange of movement.
Only open or closethe engine hoodwhenthere are no persons intheengine hood'srange of movement.
\nWARNINGDanger of burns when open‐ingthe hood
Ifyou openthe hood whenthe engine hasoverheated or during afireinthe enginecompartment,you could come into contactwith hotgases orother escaping operatingfluids.
Before openingthe hood, allowtheenginetocool down.
Intheevent of afireinthe engine com‐partment,keepthe hood closed andcallthefireservice.
\nWARNINGRisk of injuryduetomovingparts
Certain components inthe engine compart‐ment may continuetomoveor suddenlymoveagaineven afterthe ignition has beenswitched off, e.g.the coolerfan.
Makesure ofthefollowing before performingtasks inthe engine compartment:
Switchthe ignition off.
352Maintenance and care

Push handle1ofthe hood catch upwardsand liftthe hoodbyapproximately15in(40 cm).Toclose:lowerthe hood and let itfall from aheight of approximately 8 in (20 cm).
Ifthe hood canstill be lifted slightly,openthe hood again and close it with a little moreforce until it engages correctly.
Engine oil
Checkingthe engine oil level usingthe oildipstick
\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.
Requirements:RThe engine must havean oil dipstick.If not,the engine oil level can bechecked only withthe on-board computer (page 355).
Depending onthe engine,the oil dipstick may beinstalled inthe engine compartment in differentlocations.
Thewaiting time beforecheckingthe oil levelwhenthe engine is at normal operatingtempera‐ture isfiveminutes.
Parkthevehicle on a level surface.
Pull oil dipstick1out and wipe off.
Slowly slide oil dipstick1intothe guidetubetothestop, andtakeit out again afterapproximatelythree seconds.ROil level is correct: oil level is between2and3.
ROil leveltoo low: oil level is at3orbelow.
354Maintenance and care

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

\nWARNINGRisk offireand injury fromengine oil
If engine oil comes into contact withhotcomponent parts inthe engine compart‐ment, it may ignite.
Make surethat no engine oil is spillednexttothefiller opening.
Allowthe enginetocool off andthor‐oughly cleanthe engine oil from compo‐nent parts beforestartingthevehicle.
NOTEEngine damagecausedbyanincorrect oilfilter, incorrect oil or addi‐tives
Do not use engine oils or oilfilterswhich do not correspondtothe specifi‐cationsexplicitly prescribedfortheservice intervals.
Do not alterthe engine oil or oilfilter inordertoachievelongerchange intervalsthan prescribed.
Do not use additives.
Followthe instructions inthe serviceinterval displayregardingthe oilchange.
NOTEDamagecausedbyaddingtoomuch engine oil
Too much engine oil can damagethe engineorthe catalytic converter.
Haveexcess engine oilremoved at aqualified specialistworkshop.
Turncap1counter-clockwise andremoveit.
Add engine oil.
Replace cap1and turn it clockwise asfaras it will go.
Checkthe oil level again (page 354).
356Maintenance and care

NOTEPrematurewear causedbyunlea‐dedregulargasoline
Unleadedregulargasoline can causetheenginetowear morequickly and impair lon‐gevity and performance.
If unleaded premium gradegasoline isunavailable andyou havetorefuel usingunleadedregulargasoline:
Onlyfillthe fueltanktohalf full withunleadedregulargasoline andrefill assoon as possible with unleaded pre‐miumgradegasoline.
Do not drive atthe maximum speed.
Avoid sudden acceleration and enginespeedsover 3,000rpm.
Further information on fuel isavailable atthefol‐lowing locations:
Rat agasstation
Rat aqualified specialistworkshop
RUSA only: at http://www.mbusa.com
Information on additives ingasolineObservethe notes on operatingfluids(page 425).
NOTEDamagefrom use of unsuitableadditives
Even small amounts ofthe wrong additivemay leadtomalfunctions occurring.
Only add cleaning additivesrecommen‐dedbyMercedes-Benztothe fuel.
Mercedes-Benzrecommendsthatyou use fuelbrandsthat haveadditives.
In some countries,the fuelavailable may nothavesufficient additives.Residue could build upinthe fuel injection system as aresult. Inthiscase, in consultation with an authorizedMercedes-Benz Center,the fuel may be mixedwiththe cleaning additiverecommendedbyMercedes-Benz. Be suretoobservethe notesand mixingratios specified onthe container.
Tank content and fuelreserveThetotal capacity ofthe fueltank mayvary,depending onthevehicle equipment.
Capacity
ModelTotal capacity
All models17.4gal (66.0 liters)
ModelOf whichreserve
All models1.8gal (7.0 liters)
Engine oil
Notes on engine oilObservethe notes on operatingfluids(page 425).
Technical data427

NOTEEngine damagecausedbyanincorrect oilfilter, incorrect oil or addi‐tives
Do not use engine oils or oilfiltersotherthanthose which meetthe specifica‐tions necessaryforthe prescribedservice intervals.
Do not alterthe engine oil or oilfilter inordertoachievelongerchange intervalsthan prescribed.
Do not use additives.
Havethe engine oilchanged aftertheprescribed intervals.
Mercedes-Benzrecommendsthatyou havetheoilchange carried out at aqualified specialistworkshop.
Further information on engine oil and oilfilters isavailable atthefollowing locations:
RInthe Mercedes-Benz SpecificationsforOperating Fluidsbyenteringthe designation:
-Athttp://bevo.mercedes-benz.com
-Inthe Mercedes-Benz BeVo app
Rat aqualified specialistworkshop
Quality and capacity of engine oil
MB-Freigabe or MB-Approval
Gasoline engine MB-Freigabe or MB-Approval
All models229.51,229.52,229.61,229.71
Thefollowingvaluesrefertoan oilchange,includingthe oilfilter.
Replacement amount
ModelReplacementamount
C 3007.0 US qt (6.6 liters)
C 300 4MATIC 6.3 US qt (6.0 liters)
Notes on brakefluid
Observethe notes on operatingfluids(page 425).
\nWARNINGRisk of an accident duetovapor pocketsforming inthe brake sys‐tem
The brakefluid constantly absorbs moisturefromthe air. This lowersthe boiling point ofthe brakefluid. Ifthe boiling point istoo low,vapor pockets mayforminthe brake systemwhenthe brakes are applied hard.
This causesthe braking effecttobeimpaired.
Havethe brakefluidrenewed atthespecified intervals.
Havethe brakefluidregularlyreplaced at aqualified specialistworkshop.Only use brakefluid approvedbyMercedes-BenzaccordingtoMB-Freigabe or MB-Approval 331.0.
You can obtain further information on brakefluidinthefollowing places:
Rinthe Mercedes-Benz SpecificationsforOperating Fluids
-at http://bevo.mercedes-benz.com
-inthe Mercedes-Benz BeVo App
428Technical data