warning lights MERCEDES-BENZ S CLASS 2019 Owner's Manual

Furtherrelated subjects:
RNotes on tire pressure (→page 435)
RTirepressuretable (→page 437)
RTireand Loading Information placard(→page442)
Tirepressure monitoring system
Function ofthe tire pressure monitoring sys‐tem
&DANGERRisk of accident duetoincor‐rect tire pressure
Every tire, includingthe spare (if provided),should bechecked when cold at least once amonth and inflatedtothe pressurerecom‐mendedbythevehicle manufacturer (seeTireand Loading Information placard ontheB-pillar onthe driver’sside orthe tire pres‐sure label onthe inside ofthe fuelfillerflapofyourvehicle). Ifyourvehicle has tires of adifferent sizethanthe size indicated ontheTireand Loading Information placard orthe
tire pressuretable,you needtodeterminethe proper tire pressureforthose tires.
As an added safetyfeature,yourvehicle hasbeen equipped with a tire pressure monitor‐ing system (TPMS)that illuminates a low tirepressure indicator lamp when one or more ofyour tires are significantly underinflated.Accordingly, ifthe low tire pressure indicatorlamp lights up,you shouldstop andcheckyour tires as soon as possible, and inflatethemtothe proper pressure. Driving on asignificantly underinflated tire causesthe tiretooverheat and can leadtotirefailure.Underinflation also increases fuel consump‐tion andreduces tire tread life, and mayaffectthevehicle's handling and braking abil‐ity. Please notethatthe TPMS is not a substi‐tutefor proper tire maintenance, and it isthedriver'sresponsibilitytomaintain correct tirepressure,even if underinflation has notreachedthe leveltotrigger illumination ofthe TPMS low tire pressure indicator lamp.
Yourvehicle has also been equipped with aTPMS malfunction indicatortoindicate when
the system is not operating properly. TheTPMS malfunction indicator is combined withthe low tire pressure indicator lamp. Whenthe system detects a malfunction,the indica‐tor lamp willflashfor approximatelya minuteandthenremain continuously illuminated.This sequence will continue upon subsequentvehiclestart-ups as long asthe malfunctionexists.
Whenthe malfunction indicator is illumina‐ted,the system may not be abletodetect orsignal low tire pressure as intended. TPMSmalfunctions may occurfor avariety ofrea‐sons, includingthe installation of incompati‐blereplacement or alternate tires or wheelsonthevehiclethat preventthe TPMS fromfunctioning properly.
Alwayscheckthe TPMS malfunctionwarninglamp afterreplacing one or more tires orwheels onyourvehicletoensurethatthereplacement or alternate tires and wheelsallowthe TPMStocontinuetofunction prop‐erly.
Wheels and tires439

Display messagesPossible causes/consequences andPPSolutions
Detection of arestraint system malfunction:
RTheurestraint systemwarning lamp does not light up whenthe ignition is switched on.
RTheurestraint systemwarning lamp lights up continuously orrepeatedly during a journey.#Visit aqualified specialistworkshop immediately.
u
Front Left MalfunctionService Required(Example)
*The correspondingrestraint system is malfunctioning (→page 32).
&WARNINGRisk of injuryorfatal injury duetoa malfunction intherestraint system
Iftherestraint system is malfunctioning,restraint system components may be triggered unintentionally ormight not be triggered at all intheevent of an accident. This may affectthe EmergencyTensioning Device orairbag,forexample.
#Havetherestraint systemchecked andrepaired immediately at aqualified specialistworkshop.
Detection of arestraint system malfunction:
RTheurestraint systemwarning lamp does not light up whenthe ignition is switched on.
RTheurestraint systemwarning lamp lights up continuously orrepeatedly during a journey.
#Visit aqualified specialistworkshop immediately.
u
*The corresponding window curtain airbag is malfunctioning (→page 32).
488Display messages andwarning/indicator lamps

Display messagesPossible causes/consequences andPPSolutions
#Openthe windowtoensurethatthere is an adequate supply of fresh air.
#Visit aqualified specialistworkshop immediately.
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.
%LED light bulbs:the display messageforthe corresponding lamp appearsonly when allthe light-emitting diodesinthe lamp havefailed.
I
*The active headlamps are defective.
#Visit aqualified specialistworkshop.
520Display messages andwarning/indicator lamps

Display messagesPossible causes/consequences andPPSolutions
Active Headlamps Inopera-tive
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.
Display messages andwarning/indicator lamps521

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
Progressive setting
Ifyou selectthe progressive display setting,thepositions ofthe indicator lamps onthe instru‐ment display willchange.
Warning and indicator lamps:XLow beam(→page145)
`Parking lights (→page145)
WHigh beam(→page146)
>=Turnsignal lights(→page146)
^Rearfog light(→page145)
uRestraint system(→page 524)

Warning/indicator lampPossible causes/consequences andPPSolutions
#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 (→page37).
Ifyou haveplaced objects onthe front passenger seat,the seat beltwarning lamp mayremain lit.
v
Seat beltwarning lampflashes
Thered seat beltwarning lampflashes and an intermittentwarningtone sounds.
The driver or front passenger has notfastenedtheir seat belt whilethevehicle is in motion.
#Fastenyour seat belt(→page37).There are objects onthe front passenger seat.
#Removethe objects fromthe front passenger seat.
Display messages andwarning/indicator lamps529

Warning/indicator lampPossible causes/consequences andPPSolutions
Engine diagnosiswarninglampIn somestates, legalrequirementsstipulatethatyou must immediately consult aqualified specialistworkshop as soonastheyellow Check Enginewarning lamp lights up.
#Havethevehiclechecked as soon as possible at aqualified specialistworkshop.
=
Electrical malfunctionwarn‐ing lamp
Thered electrical malfunctionwarning lamp is lit.
There is a malfunction inthe electrics.
#Observethe messages onthe multifunction display.

Warning/indicator lampPossible causes/consequences andPPSolutions
or
#Exitthevehicle andkeep a safe distance from it untilthe engine has cooled down.
#Checkthe coolant level (→page 401).
#Make surethatthe air supplytotheradiator is not obstructed.
#Avoiding high loads onthe engine, drivetothe nearestqualified specialistworkshop. In doing so, ensurethatthecoolanttemperature displayremains belowthered area.
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.
&WARNINGRisk 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.
Display messages andwarning/indicator lamps533

Front passenger headrestraintInstalling/removing (chauffeurmode) ..................................................101
Front passenger seatAdjusting fromthe driver's seat ............ 95Adjusting fromtherear passengercompartment ........................................ 95Installing/removingthe headrestraint (chauffeur mode) ...................101
Fuel...........................................................470Additives ..............................................470E10 ...................................................... 469Fuelreserve.........................................470Gasoline .............................................. 469Quality (gasoline) ................................ 469Refueling .............................................180sulfur content ...................................... 469Tank content ........................................470
Fuel consumptionOn-board computer .............................257
Function seatsee Door control panel
Function seat (rear passenger com‐partment)see Seat (rear passenger compartment)
Fuse insertseeFuses
Fuses........................................................ 430Beforereplacing a fuse ........................ 430Dashboard fuse box ............................ 432Fuse assignment diagram ...................430Fuse box inthe engine compartment .. 431Fuse box inthe front-passengerfoot‐well ...................................................... 432Fuse box inthe trunk ........................... 433Notes .................................................. 430
FusesseeFuses
G
Garage door openerClearingthe memory ...........................187Opening or closingthe door ................186Programming buttons ..........................184Radio equipment approval numbers ....187Resolving problems .............................186
Synchronizingtherolling code .............185
Gasstation searchStarting automatic search................... 305Switching automatic search on/off ......311Using automatic search.......................311
Gasoline...................................................469
Gearshiftrecommendation....................17 9
Genuine parts............................................19
Glassroofsee MAGIC SKYCONTROL
Glide mode...............................................180
GloveboxAirvent ................................................16 6Locking/unlocking ..............................12 3
H
Handbrakesee Electric parking brake
Handlingcharacteristics (unusual)....... 434
HANDS-FREEACCESS................................73
Hazardwarning lights.............................147
552Index

K
KEYLESS-GOLockingthevehicle ................................67Problem .................................................68Unlocking setting .................................. 63Unlockingthevehicle ............................67
Kickdown.................................................180Using ...................................................180
Knee airbag................................................ 38
L
Labeling (tires)seeTirelabeling
Lampsee Interior lighting
Lamps (Instrument Display)seeWarning/indicator lamps
Lane detection (automatic)seeActive LaneKeeping Assist
LaneKeeping AssistseeActive LaneKeeping Assist
Language.................................................293Notes .................................................. 293Setting .................................................293
LATCH-type (ISOFIX)child seat secur‐ing systemInstalling ................................................ 53
Level control systemsee AIRMATICsee MAGICBODYCONTROL
Light switchOverview .............................................145
Lightingsee Interior lightingsee Lights
Lights........................................................14 5Adaptive Highbeam Assist ...................148Adjustingthe instrument lighting ........ 255Automatic driving lights .......................14 6Combination switch.............................14 6Cornering light function .......................14 8Hazardwarning lights ..........................147High beam ...........................................14 6High-beamflasher ...............................146Light switch .........................................14 5
Low-beam headlamps .........................145Parking lights .......................................145Rearfog lamp ......................................14 5Responsibilityfor lighting systems ......14 5Settingtheexterior lighting switch-off delay time ......................................14 9Settingthe surround lighting ...............149Standing lights .....................................145Turnsignals .........................................14 6
LimitedWarrantyVehicle .................................................. 25
LiveTraffic InformationDisplaying subscription information .....318Displayingthe traffic map ....................319Displaying traffic incidents .................. 320Extending a subscription ......................318Issuing hazard alerts ........................... 320
Load index (tires)....................................449
Load-bearing capacity (tires).................449
LoadingDefinitions ...........................................451Notes ...................................................121Roof carrier .........................................12 9Stowage space underthe trunkfloor ...12 9
Index555