fuel consumption MERCEDES-BENZ C CLASS 2019 Owners Manual

Ifthevehicle is not opened within approximately40 seconds after unlocking, it locksagain. Anti-theft protection is activated again.
Do notkeepthe SmartKeytogether with elec‐tronic devices or metal objects. This can affectthe SmartKey's functionality.
If batterycheck lamp2does not light upafter pressingthe6or7button,thebattery is discharged.
Replacingthe SmartKeybattery(page 66).
Activating/deactivating the acoustic lockingverification signal
Multimedia system:
VehicleîVehicle SettingsAcoustic Lock
Activatesor deactivateSthe function.
Activating/deactivating the panic alarm
Requirements:RThe ignition is switched off
The panic alarm function is onlyavailable incertain countries.
Toactivate:press button1for approx‐imatelyone second.A visual and audible alarm is triggered.Todeactivate:briefly press button1again.
or
Pressthestart/stop button onthe cockpit(the SmartKeyis insidethevehicle).
Changingthe unlocking settings
Possible unlocking functions ofthe SmartKey:
RCentral unlocking
RUnlockingthe driver's door and fuelfillerflap
Toswitch between settings:pressthe6and7buttons simultaneouslyforapproximately six seconds untilthe batterycheck lampflashes twice.
Ifthe unlocking functionforthe driver's doorand fuelfillerflap has been selected:
RPressingthe6button a second time cen‐trally unlocksthevehicle
RVehicles with KEYLESS-GO:Ifyoutouchthe inner surface ofthe door handle onthedriver's door, onlythe driver's door and fuelfillerflap are unlocked.
Deactivatingthe SmartKeyfunctions
Ifyou do not usethevehicle or a SmartKey foranextended period of time,you canreducetheenergy consumption oftherespective Smart‐Key .Todo so, deactivatethe SmartKeyfunc‐tions.
Opening and closing65

Todeactivate:pullsteering wheel paddleshifter2and hold it in place.The transmission position[appears inthemultifunction display.
Permanent setting:
Changetodrive program=(page153).
Select drive programManual(page153).
Mercedes-AMGvehicles:observethe notes inthe Supplement. Otherwise,you mayfailtorec‐ognize dangers.
Gearshiftrecommendation
Mercedes-AMGvehicles:observethe notes inthe Supplement. Otherwise,you mayfailtorec‐ognize dangers.
Thegearshiftrecommendation assistsyou inadopting an economical drivingstyle.
Ifgearshiftrecommendation message1isshown onthe multifunction display,shifttotherecommendedgear.
Using kickdown
Mercedes-AMGvehicles:observethe notes inthe Supplement. Otherwise,you mayfailtorec‐ognize dangers.
Maximum acceleration:depressthe accel‐erator pedal beyondthe pressure point.
The automatic transmission shifts uptothe nextgear whenthe maximum engine speed isreachedtoprotectthe engine fromoverrevving.
Glide mode function
Mercedes-AMGvehicles:observethe notes inthe Supplement. Otherwise,you mayfailtorec‐ognize dangers.
Withan anticipatory drivingstyle,glide modehelpsyoutoreduce fuel consumption.
Glide mode ischaracterizedbythefollowing:
Rthe combustion engine is disconnected fromthe drivetrain andthe engine continuestorun in neutral.
Rthe transmission position[is displayed ingreen inthe multifunction display.
Glide mode is activated ifthefollowing condi‐tions are met:
Rdrive program;is selected.
Rthe speed is within a suitablerange.
Rtheroad's course is suitable, e.g. nosteepuphill or downhill inclines or tight bends.
Ryou are no longer depressingthe acceleratoror brake pedal.
Driving and parking157

The drive program can be adjusted usingtheDYNAMIC SELECT switch.
AIRMATIC
Function of AIRMATICAIRMATIC is an air suspension system withvaria‐ble dampingfor improved driving comfort. Theall-round level control system ensuresthe best
possible suspension and constant ground clear‐ance,even witha ladenvehicle. When driving atspeed,thevehicle is lowered automaticallytoimprove driving safety andtoreduce fuel con‐sumption.You also havethe option of manuallyadjustingthevehicle level.
AIRMATIC includesthefollowing componentsand functions:
RAir suspension with automatic level control
RSpeed-dependent loweringtoreduce fuelconsumption
RManually selectable high-level settingforgreater ground clearance
RADS PLUS (Adaptive Damping System withconstant dampingforce adjustment)
RDYNAMIC SELECT switch and level button
Available suspension tunings
Drive programCharacteristics
A(Comfort)RThe suspension tuning is comfortable.
RThevehicle is settothe normal level.
RWhen driving at speeds above77mph (125 km/h)thevehicle is lowered.
RWhen driving at speeds below 50mph (80 km/h)thevehicle israised again.
;(Economy)RThe suspension tuning is comfortable.
RThevehicle is settothe low level.
RThevehicle is not lowered any further ifyou are traveling at higher speeds.
Driving and parking197

Example: trip computer
1Total distance
2Driving time
3Average speed
4Average fuel consumption
Resettingvalues onthe trip menu ofthe on-board computer
On-board computer:
Trip
The spelling onthe main menu displayedmay differ.Therefore, observethe menu
overviewforthe Instrument Display(page 228).
You canresetthevalues ofthefollowing func‐tions:
RTrip distance
RTrip computerFrom StartandFrom Reset
RECO display(page152)
Toselectthe functiontobereset:swipeupwards or downwards onthe left-handTouch Control.
Pressthe left-handTouch Control.
SelectYes.
Pressthe left-handTouch Control.
Ifyou press and holdthe left-handTouch Con‐trol,thevalues ofthe function will beresetimmediately.
Calling up navigation instructions onthe on-board computer
On-board computer:
Navigation
Example: nochange of direction announced
1Distancetothe nextchange of direction
2Distancetothe next destination
3Estimated arrival time at next destination
4Currentroad
Instrument Display and on-board computer233

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
392Wheels and tires

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.
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 meansthattherisk
412Wheels and tires

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

Foil coveringRadar sensors ......................................171
FragranceseePerfume atomizer
Free software.............................................31
FrequenciesTwo-wayradio ...................................... 422
Frequency bandDialing (on-board computer) ................ 235
Front airbag (driver, front passenger).....40
Front passenger seatsee Seat
Front wheel arch.....................................12 9Installing/removingthe cover .............129
Front wheel archcoverInstalling/removing .............................12 9
Fuel...........................................................427Additives .............................................427E10 ...................................................... 426Fuelreserve......................................... 427Gasoline .............................................. 426Quality (gasoline) ................................ 426Refueling .............................................15 9
sulfur content ...................................... 426Tank content ....................................... 427
Fuel consumptionOn-board computer .............................232
Function seatsee Door control panel
Fuses........................................................ 386Beforereplacing a fuse ........................ 386Dashboard fuse box ............................ 388Fuse assignment diagram ...................386Fuse box inthe engine compartment .. 387Fuse box inthe front-passengerfoot‐well ...................................................... 388Fuse box inthe trunk ........................... 388Notes .................................................. 386
FusesseeFuses
G
Garage door openerClearingthe memory ...........................16 6Opening or closingthe door ................166Programming buttons ..........................16 3Radio equipment approval numbers ....16 6
Resolving problems .............................16 5Synchronizingtherolling code .............164
Gasstation searchStarting automatic search................... 281Switching automatic search on/off ..... 287Using automatic search....................... 287
Gasoline................................................... 426
Gearshiftrecommendation....................157
Genuine parts............................................21
Glide mode...............................................157
GloveboxLocking/unlocking ..............................105
H
Handbrakesee Electric parking brake
Handlingcharacteristics (unusual)....... 390
HANDS-FREEACCESS................................76
Hazardwarning lights.............................125
HeadrestraintFront (adjusting mechanically) .............. 96Rear (installing/removing) .....................97
508Index