2019 MERCEDES-BENZ C CLASS air conditioning

Overview of climate control systems
Notes on climate control
An interior airfilter must always be used sothatthe air conditioning system, pollution level moni‐toring andthe airfiltering functionworkcor‐rectly. Makesurethatthefilter is installed cor‐rectly andthefilter housing inthe engine com‐partment is closed correctly usingthe cap andalways tightly sealed when in operation. Usefil‐tersrecommended and approvedbyMercedes-Benz. Always haveserviceworkcarried out at aqualified specialistworkshop.
Overview ofthe control panelfor dual-zoneautomatic climate control
The indicator lamps onthe buttons indicatethatthe corresponding function is activated.
1

3-Setsthe airflowor switch off climatecontrol
4XSets climate controltoautomaticmode (page140)
5dDefroststhe windshield
6Calls upthe air conditioning menu
Switchestheresidual heat on or off(page141)
7lSwitchestherear windowheateron/off
8ZSwitchesthe A/C function on/off(page139)
9rSwitches air-recirculation mode on/off(page141)
A

Make surethat marked space2is empty.
RemoveSmartKey1fromthekeyring.
Place SmartKey1in marked space2onthe symbol3.Thevehicle willstart after a short time.
IfyouremoveSmartKey1from markedspace2the engine continuesrunning.Forfurther enginestarts however,SmartKey1
must be located in marked space2on sym‐bol3duringthe entire journey.
Havethe SmartKey1checked at aqualifiedspecialistworkshop.
Ifthevehicle does notstart:
Place SmartKey1in marked space2andleaveitthere.
Depressthe brake pedal andstartthevehicleusingthestart/stop button.
You can also switchonthe power supplyorthe ignition withthestart/stop button.
Startingthevehicle viaRemoteOnline serv‐ices
Cooling or heatingthevehicle interior beforecommencingyour journey
This function is notavailable in all countries.
Ifyoustartthevehicle viayour smartphone,thepreviously selected air conditioning adjustmentis active.
Ensurethefollowing beforestartingthe engine:
RThe legalstipulations inthe area whereyourvehicle is parked allow enginestarting viasmartphone.
RIt is safetostart andrunthe engine whereyourvehicle is parked.
RThe fueltank is sufficientlyfilled.
RThestarter battery is sufficientlycharged.
You can also setthetemperature withyoursmartphone. Information on Mercedes meconnect andother services: http://www.mercedes.meThis function is notavailablefor all models.
Chargingthe batterybefore commencingyour journey
This function is notavailable in all countries.
RIfthevehicle battery is discharged,youreceivea message onyour smartphone.
RYou canthenstartthevehicle withthesmartphonetochargethe battery.
RThevehicle is automatically switched offafterten minutes.
14 6Driving and parking

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

Active Service System PLUSsee ASSYSTPLUS
Active Speed Limit Assist.......................187Display.................................................187Function ..............................................187
ActiveSteering Assist.............................189Activating/deactivating .......................191Active EmergencyStop Assist .............193Active Lane Change Assist...................191Displays inthe Instrument Display ......19 3Function ..............................................189System limitations ...............................189
Adaptive cruise controlseeActive Distance AssistDISTRONIC
Adaptive Highbeam AssistFunction ..............................................12 5Switching on/off .................................12 6
AdditionalvaluerangeSetting display content ........................ 229
Additives.................................................. 427Engine oil ............................................. 427Fuel ..................................................... 427
Additives (engine oil)seeAdditives
Additives (fuel)seeFuel
Address booksee Contacts
Adjusting the balance/fader
Burmester®surround sound system ... 350
Adjusting the headlamprange...............12 3
Adjusting the soundfocus
Burmester®surround sound system ... 350
Adjusting treble, mid-range and basssettings
Burmester®surround sound system ... 350
ADS PLUS damping systemsee AIRMATIC
After-sales service centersee ASSYST PLUS
Air bagReduced protection ...............................42
Air conditioning systemsee Climate control
Air distributionSetting .................................................138
Air freshener systemseePerfume atomizer
Air inletsee Air-water duct
Air pressureseeTirepressure
Air suspensionsee AIRMATIC
Airvents...................................................14 3Adjusting (front) ..................................14 3Adjusting (rear) ....................................14 3
Airventssee Airvents
Air-recirculation mode.............................141
Air-water duct.......................................... 358Keeping free ........................................358
Airbag.........................................................40Activation .............................................. 34Front airbag (driver, front passenger) ....40Installation locations .............................40Knee airbag ........................................... 40
494Index

O
Occupant safetyPets inthevehicle ................................. 62
Occupant safetysee AirbagseeAutomatic front passenger frontairbag shutoff
see PRE-SAFE®(anticipatory occu‐pant protection)
see PRE-SAFE®PLUS (anticipatoryoccupant protection plus)seeRestraint systemsee Seat belt
OdometerseeTotal distance
Oilsee Engine oil
On-board computer................................. 228Assistance graphic menu ..................... 231Displayingthe service due date ........... 351Head-up Display menu ........................ 237Media menu ........................................235Menu designs ...................................... 229Menuoverview .................................... 228
Multifunction display ...........................230Navigation system menu ..................... 233Operating ............................................ 228Radio menu .........................................235Service menu ...................................... 231Telephone menu .................................. 236Trip menu ............................................ 232
On-boarddiagnostics interfacesee Diagnostics connection
Open-source software...............................31
Openingthe trunk lid usingyourfootHANDS-FREEACCESS ...........................76
OperatingfluidsAdditives (fuel) .................................... 427Brakefluid ...........................................428Coolant (engine) .................................. 429Engine oil ............................................. 427Fuel (gasoline) .....................................426Notes .................................................. 425Refrigerant (air conditioning system) ... 430Windshieldwasherfluid ...................... 429
Operating safetyDeclaration of conformity (wirelessvehicle components) ............................. 25
Information ............................................24
Operating systemsee On-board computer
Operator's ManualVehicle equipment ................................. 22
Operator's Manual (digital)......................20
Overhead control panelMaking calls (Mercedes me connect) ..319Overview ................................................14
P
Paint code................................................ 423
Paintwork (cleaning instructions).......... 361
Panic alarm................................................ 65Activating/deactivating ......................... 65
Panoramic sliding sunroofsee Sliding sunroof
ParkpositionInserting ..............................................15 5Selecting automatically.......................15 5
Parkingsee Electric parking brake
Index515

Preventative occupant protection sys‐tem
see PRE-SAFE®(anticipatory occu‐pant protection)
Previous destinationsSelecting .............................................280
ProgramsseeDYNAMIC SELECT
Protectingthe environmentNotes .....................................................21
Q
QR codeRescue card .......................................... 28
Qualified specialistworkshop................. 26
R
Radar sensorsFoil covering ........................................171
RadioActivating/deactivatingradiotext ....... 345Calling upthestation list .....................344Deletingchannels ................................ 344
Direct frequency entry........................ 344Displaying information ......................... 345Displayingradiotext ............................ 345Editingstation presets ........................ 344Menu (on-board computer) .................. 235Movingstations ...................................344Overview ............................................. 343Searchingforstations .........................344Setting achannel ................................ 344Settingthewaveband .......................... 344Storingradiostations .......................... 344Switching on .......................................342Switchingthe HDradio functionon/off .................................................344Voice commands (Voice Control Sys‐tem) .....................................................247
RadiostationsDialing (on-boardcomputer) ................235
Rain closing functionSliding sunroof ...................................... 86
RangeDisplaying ............................................ 232
Reading lightsee Interior lighting
Realwood (Care).....................................365
Rear climate controlSetting .................................................14 0
Rear door (child safety lock).....................61
Rearfog lampSwitching on/off .................................123
Rear seatsee Seat
Rear view camera....................................204Care.................................................... 364Function .............................................. 204Openingthe camera cover (360°Camera) ..............................................209Settingfavorites (360° Camera) ......... 209
Rear windowRoller sunblind ...................................... 79
Rear window defroster...........................138
Reflective safetyvest............................. 368
Refrigerant (air conditioning system)Notes .................................................. 430
RefuelingRefuelingthevehicle ...........................15 9
Index517