2019 MERCEDES-BENZ C CLASS warning light

Lights
Display messagesPossible causes/consequences andPPSolutions
I
Intell. Light System Inoper-ative
*The Intelligent Light System is defective. The lighting system continuestofunction properly withoutthe functions ofthe Intelligent Light System.
Visit aqualified specialistworkshop.
I
Check Left LowBeam(Example)
*The corresponding light source is defective.
Drive on carefully.
Visit aqualified specialistworkshop immediately.
or
Check whetheryou are permittedtoreplacethe light sourceyourself (page129).
LED light bulbs:the display messageforthe corresponding lamp appearsonly when allthe light-emitting diodesinthe lamp havefailed.
I
Active Headlamps Inopera-tive
*The active headlamps are defective.
Visit aqualified specialistworkshop.
476Displaymessages andwarning/indicator lamps

Display messagesPossible causes/consequences andPPSolutions
I
Switch Off Lights
*You are leavingthevehicle andthe lights arestill switched on.
Turnthe light switchtotheXposition.
I
Malfunction See Opera-tor’s Manual
*Theexterior lighting is defective.
Visit aqualified specialistworkshop.
I
Switch On Headlamps
*You are driving without low-beam headlamps.
Turnthe light switchtotheXorXposition.
I
Automatic Headlamp ModeInoperative
*The light sensor isfaulty.
Consult aqualified specialistworkshop.
*Adaptive Highbeam Assist is malfunctioning.
Display messages andwarning/indicator lamps477

Warning and indicator lamps
Overview ofwarning and indicator lamps
Some systems will performa self-test whentheignition is switched on. Somewarning and indi‐cator lamps may brieflylight up orflash. Thisbehavior is non-critical. Thesewarning and indi‐cator lamps indicate a malfunction only iftheylight up orflash afterthe engine has beenstar‐ted or during a journey.
Instrument Display (standard)
Widescreen Cockpit Instrument Display
Depending onthe display setting,the positionsofthe indicator lamps onthe Instrument Displaymay differ fromtheexample shown.
Warning and indicator lamps:XLow beam (page122)
`Parking lights (page122)
WHigh beam (page124)
>=Turnsignal indicator(page124)
^Rearfog light(page122)
uRestraint system (page 480)

Warning/indicator lampPossible causes/consequences andPPSolutions
Restraint systemwarninglamp\nWARNINGRisk of injuryorfatal injury duetoa malfunction intherestraint system
Iftherestraint system is malfunctioning,restraint system components may be triggered unintentionally or might notbe triggered at all intheevent of an accident. This may affectthe EmergencyTensioning Device or airbag,forexam‐ple.
Havetherestraint systemchecked andrepaired immediately at aqualified specialistworkshop.
Drive on carefully.
Observethe messages onthe multifunction display.
Visit aqualified specialistworkshop immediately.
Seat belts
Warning/indicator lampPossible causes/consequences andPPSolutions
v
Seat beltwarning lamplights up
Thered seat beltwarning lamp will light upfor six seconds oncethe engine hasstarted.
In addition, awarningtone may sound.
The seat beltwarning lampremindsthe driver and front passengertofastentheir seat belts.
Fastenyour seat belt (page 38).
Ifyou haveplaced objects onthe front passenger seat,the seat beltwarning lamp mayremain lit.
Display messages andwarning/indicator lamps485

Tires
Warning/indicator lampPossible causes/consequences andPPSolutions
w
Tirepressure monitoringsystemwarning lamp lightsup
Theyellow tire pressure monitoring systemwarning lamp (pressure loss/malfunction) is lit.
The tire pressure monitoring system has detected tire pressure loss in at least one ofthe tires.
\nWARNINGRisk of an accident duetoinsufficient tire pressure
Tirepressuresthat aretoo low posethefollowing hazards:
RThe tires may burst, especially asthe load andvehicle speed increase.
RThe tires maywearexcessively and/or unevenly,which may greatly impair tire traction.
RThe drivingcharacteristics, aswell assteering and braking, may be greatly impaired.
You couldthen lose control ofthevehicle.
Observetherecommended tire pressure.
Adjustthe tire pressure if necessary.
Stopthevehicle, paying attentiontoroad and traffic conditions.
Checkthe tire pressure andthe tires.
w
Theyellow tire pressure monitoring systemwarning lamp (pressure loss/malfunction)flashesfor approximatelyoneminute andthenremains lit.
The tire pressuremonitoring system is defective.
490Display messages andwarning/indicator lamps

wWarningTireMalfunction............ 467
wWheel Sensor(s) Missing.............469
Display onthe windshieldsee Head-up Display
Distance controlseeActive Distance AssistDISTRONIC
DistancerecorderseeTrip distance
DISTRONICseeActive Distance AssistDISTRONIC
DoorChild safety lock(rear door) ...................61Locking (emergencykey) .......................72Opening (fromthe inside) ......................69Unlocking (emergencykey) ....................72Unlocking (fromthe inside) ...................69
Door control panel.....................................16
DOT,TireIdentificationNumber (TIN)... 404
DrawbarseeTow-bar system
Drinking and driving................................14 8
DriveAway Assist....................................214
Drive positionInserting ..............................................15 6
Drive program display.............................15 3
Drive programsseeDYNAMIC SELECT
Driver's seatsee Seat
Driving lightsseeAutomatic driving lights
Driving safety system.............................170ABS (Anti-lock Braking System) ...........171Active Brake Assist..............................175BAS (Brake AssistSystem) ...................172EBD (electronic brakeforce distribu‐tion) .....................................................175
ESP®Crosswind Assist........................175Overview ..............................................171Radar sensors ......................................171Responsibility ......................................17 0STEER CONTROL .................................175
Driving systemDYNAMICBODYCONTROL ..................19 6
Driving systemsee 360° CameraseeActive Blind Spot AssistseeActive Distance AssistDISTRONICseeActive EmergencyStop AssistseeActive Lane Change AssistseeActive LaneKeeping AssistseeActiveParking AssistseeActive Speed Limit AssistseeActiveSteering Assistsee AIRMATICseeATTENTION ASSISTsee Blind Spot Assistsee Cruise controlsee Driving safety systemsee HOLD functionseeParking AssistPARKTRONICseeRear view cameraseeTraffic Sign Assist
Driving tipsDrinking and driving ............................14 8General driving tips .............................148Notes on breaking-in a newvehicle .....147
Drowsiness detectionseeATTENTION ASSIST
Index505

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

Rear passenger compartment(adjusting) .............................................97
Head-up Display...................................... 237Adjusting display elements (on-boardcomputer) ............................................ 237Adjustingthe brightness (on-boardcomputer) ............................................ 237Function .............................................. 237Menu (on-board computer) .................. 237Settingthe position (on-board com‐puter) .................................................. 237Switching on/off ................................. 238
Headliner (care)....................................... 365
Heatingsee Climate control
High beamSwitching on/off .................................124
High-beam flasher...................................124
High-beam headlampsAdaptive Highbeam Assist ...................125Replacing bulbs ...................................130
Hillstart assist........................................19 5
HOLD function.........................................19 5Function/notes ...................................19 5Switching on/off .................................19 5
HoodOpening/closing ................................. 352
Hookingthe luggage net........................109
HotspotSetting up (Wi-Fi) ................................. 267
I
Identification plateEngine .................................................423Refrigerant .......................................... 430Vehicle ................................................ 423
IgnitionSwitching on (Start/Stop button) ........14 4
Ignitionkeysee SmartKey
Immobilizer................................................ 88
Indicator lampsseeWarning/indicator lamps
Individual drive programConfiguring ..........................................15 3
Selecting .............................................15 3
Insiderearview mirrorsee Exterior mirrors
Inspectionsee ASSYSTPLUS
Instrument clustersee Instrument Display
Instrument cluster lighting.................... 231
Instrument Display................................. 226Adjustingthe lighting ........................... 231Function/notes ................................... 226Instrument cluster .................................10Settingthe additionalvaluerange ....... 229Warning/indicator lamps .....................479
Intelligent Light SystemAdaptive Highbeam Assist ...................125Cornering light function .......................12 5
Interior lighting........................................127Ambient lighting ..................................12 8Reading light ........................................127Setting .................................................127Switch-off delaytime ...........................12 8
Index509