belt MERCEDES-BENZ C CLASS 2019 User Guide

Status ofthe front passenger front airbag
Function ofthe automatic front passengerfront airbag shutoffThe automatic front passenger front airbag shut‐off is abletodetect whetherthe front passengerseat is occupiedbya person or achildrestraintsystem. The front passenger front airbag is ena‐bled or disabled accordingly.
When installing achildrestraint system onthefront passenger seat, always make sure ofthefollowing:
REnsurethatthechildrestraint system is posi‐tioned correctly (page48).
RAlways observethechildrestraint systemmanufacturer's installation instructions.
RNever place objects, e.g. cushions, under orbehindthechildrestraint system.
RFullyretractthe seat cushion length adjust‐ment.
RThe entire base ofthechildrestraint systemmust alwaysrestonthe seat cushion ofthefront passenger seat.
RThe backrest oftheforward-facingchildrestraint system must lie asflat as possibleagainstthe backrest ofthe front passengerseat.
RThechildrestraint system must nottouchtheroof or be put understrainbythe headrestraints.Adjustthe seat backrest inclina‐tion andthe headrestraint setting accord‐ingly.
\nWARNINGRisk of injuryor death duetoobjects betweenthe sitting surface andthechildrestraint system
Objects betweenthe sitting surface andthechildrestraint system could affectthe func‐tion ofthe automatic front passenger airbagshutoff.
This couldresult inthe front passenger air‐bag not functioning as intended during anaccident.
Do not place any objects betweenthesitting surface andthechildrestraintsystem.
The entire base ofthechildrestraintsystem must alwaysrestonthe sittingsurface ofthe front passenger seat.
The backrest oftheforward-facingchildrestraint system must, asfar as possi‐ble, beresting onthe seat backrest ofthe front passenger seat.
Always comply withthechildrestraintsystem manufacturer's installationinstructions.
A person onthe front passenger seat mustobservethefollowing information:
RFasten seat belts correctly (page36).
RSit in an almost upright seat position withtheir back againstthe seat backrest.
RSit withtheirfeetresting onthefloor, if pos‐sible.
The front passenger front airbag mayotherwisebe disabledbymistake,forexample inthefol‐lowing situations:
RThe front passenger transferstheirweightbysupportingthemselves on avehicle armrest.
Occupant safety43

\nWARNINGRisk of injuryor death duetoincorrect positioning oftheforward-facingchildrestraint system
Ifyou secure achild in aforward-facingchildrestraint system onthe front passenger seatandyou positionthe front passenger seattooclosetothe cockpit, intheevent of an acci‐dent,thechild could:
RCome into contact with thevehicle inte‐rior ifthePASSENGER AIRBAG OFF indi‐cator lamp is lit,forexample.
RBestruckbythe air bag ifthePASSENGER AIRBAG OFF indicator lampis off.
Always movethe front passenger seatasfar back as possible and fullyretractthe seat cushion length adjustment.Always make surethatthe shoulder beltstrap is correctlyrouted fromthe seatbelt outlet onthevehicletothe shoul‐der belt guide onthechildrestraint sys‐tem. The shoulder beltstrap must beroutedforwards and downwards fromthevehicle belt outlet. If necessary,
adjustthe seat belt outlet andthe frontpassenger seat accordingly.
Always observethechildrestraint sys‐tem manufacturer's installation instruc‐tions.
When installing achildrestraint system onthefront passenger seat, observethevehicle-spe‐cific information (page 59).
If a person is sitting onthe front passengerseat:PASSENGER AIRBAG OFF may be lit con‐tinuously or be off, depending onthe person'sstature.
A person onthe front passenger seat mustalways observethefollowing information:
RIfthe front passenger seat is occupiedbyanadult or a person with astature correspond‐ingtothat of an adult,thePASSENGER AIRBAG OFF indicator lamp must be off. Thisindicatesthatthe front passenger front air‐bag is enabled.
IfthePASSENGER AIRBAG OFF indicatorlamp is lit continuously,an adult or person
with a build correspondingtothat of an adultshould not usethe front passenger seat.
Instead,theyshould use arear seat.
RIfthe front passenger seat is occupiedby aperson of smallerstature (e.g. ateenager orsmall adult),thePASSENGER AIRBAG OFFindicator lamp either lights up continuouslyorremains off, depending ontheresult oftheclassification.
-IfthePASSENGER AIRBAG OFF indicatorlamp is off: movethe front passengerseat asfar back as possible, orthe per‐son of smallerstature should use arearseat.
-IfthePASSENGER AIRBAG OFF indicatorlamp is lit continuously:the person ofsmallerstature should not usethe frontpassenger seat.
46Occupant safety

\nWARNINGRisk of injuryor death whenthePASSENGER AIRBAG OFF indicatorlamp is lit
IfthePASSENGER AIRBAG OFF indicatorlampremains lit afterthe system self-test,the front passenger air bag is deactivated. Itwill not be deployed intheevent of an acci‐dent. Inthis case,the front passenger air bagcannotperformits intended protective func‐tion, e.g. when a person is seated inthe frontpassenger seat.
That person could,forexample, come intocontact with thevehicle interior, especially ifthe person is sittingtoo closetothe cockpit.
Ifthe front passenger seat is occupied,always ensurethat:
RThe classification ofthe person inthefront passenger seat is correct andthefront passenger air bag is enabled ordeactivated in accordance withthe per‐son inthe front passenger seat.
RThe person is seated properlywith a cor‐rectlyfastened seat belt.
RThe front passenger seat has been movedasfar back as possible.
Be suretoalso observethefollowing furtherrelated subjects:
RChildrestraint system onthe front passengerseat (page 59).
PRE-SAFE®system
PRE-SAFE®(anticipatoryoccupant protec‐tion)
PRE-SAFE®is abletodetect certain critical driv‐ing situations and implement pre-emptive meas‐urestoprotectthevehicle occupants.
PRE-SAFE®can implementthefollowing meas‐ures independently of eachother:
RTighteningthe seat belts onthe driver's seatand front passenger seat.
RClosingthe side windows.
RVehicles with sliding sunroof:Closingthesliding sunroof.
RVehicles with memory function:Movingthe front passenger seattoa morefavorableseat position.
RVehicles with multicontour seat:Increas‐ingthe air pressure inthe seat side bolstersofthe seat backrest.
RPRE-SAFE®Sound: providedthatthe multi‐media system is switched on,generates abrief noise signaltostimulatethe innate pro‐tective mechanism of a person's hearing.
NOTEDamagecausedbyobjects inthefootwell or behindthe seat
The automatic adjustment ofthe seat posi‐tion mayresult in damagetothe seat and/orthe object.
Stowobjects in a suitable place.
Occupant safety47

Reversingthe PRE-SAFE®system measures
If an accident did not occur,the pre-emptivemeasuresthatweretaken arereversed.
You will needtoperformcertain settingsyour‐self.
Ifthe seat belt pre-tensioning is notreduced,movethe seat backrest back slightly.The locking mechanismreleases.
Function of PRE-SAFE®PLUS (anticipatoryoccupant protection plus)
PRE-SAFE®PLUS can detect certain impacts,particularlyan imminentrear impact, andtakepre-emptive measurestoprotectthevehicleoccupants. These measures cannot necessarilyprevent an imminent impact.
PRE-SAFE®PLUS can implementthefollowingmeasures independently of eachother:
RTighteningthe seat belts onthe driver's seatand front passenger seat.
RIncreasing brake pressure whenthevehicleisstationary.This brake application is can‐
celed automatically whenthevehicle pullsaway.
If an accident did not occur,the pre-emptivemeasuresthatweretaken arereversed.
System limitations
The system will not initiate any action inthefol‐lowing situations:
Rwhen backing up
The system will not initiate any braking applica‐tion inthefollowing situations:
Rwhilst driving
or
Rwhen entering orexiting a parking spacewhile usingActiveParking Assist
Safely transportingchildren inthevehicle
Always observewhenchildren are travelinginthevehicle
Alsostrictly observethe safety notesforthespecific situation. Inthiswayyou canrecog‐nize potentialrisks andavoid dangers ifchil‐
dren are traveling inthevehicle(page 49).
Be diligentBear in mindthat neglectingtosecure achild inthechildrestraint system may haveserious con‐sequences. Always be diligent in securing achildcarefully beforeevery journey.
Toimprove protectionforchildrenyoungerthan12years old or under 5ft(1.50 m) in height,Mercedes-Benzrecommendsyou observethefollowing information:
RAlways securethechild in achildrestraintsystem suitableforthis Mercedes-Benzvehi‐cle.
RThechildrestraint system must be appropri‐atetothe age,weight and size ofthechild.
RThevehicle seat must be suitablefor instal‐ling achildrestraint system.
Accidentstatistics showthatchildren secured intherear seats aregenerallysaferthanchildrensecured inthe front seats.Forthisreason,Mercedes-Benzstrongly advisesthatyou installachildrestraint system on arear seat.
48Occupant safety

Genericterm"childrestraint system"
Thegenerictermchildrestraint system is usedinthis Operator's Manual. Achildrestraint sys‐tem is,forexample:
Ra baby car seat
Rarearward-facingchild seat
Raforward-facingchild seat
Rachild booster seat with a backrest and seatbelt guide
Mercedes-Benzrecommends using achildbooster seat with a backrest.
Thechildrestraint system must be appropriatetothe age,weight and size ofthechild.
Observing lawsand legalrequirementsAlways observethe legalrequirements whenusing achildrestraint system inthevehicle.
Observingstandardsforchildrestraint sys‐tems
Allchildrestraint systems must meetthefollow‐ingstandards:
RU.S.Federal MotorVehicle SafetyStandards213 and 225
RCanadian MotorVehicle SafetyStandards213 and210.2
Confirmationthatthechildrestraint systemcomplies withthestandards can befound on aninstruction label onthechildrestraint system.This confirmation can also befound inthe instal‐lation instructionsthat are included withthechildrestraint system.
Detectingrisks,avoiding danger
Securing systemsforchildrestraint systemsinthevehicle
Only usethefollowing securing systemsforchildrestraint systems:
RtheLATCH-type (ISOFIX) mounting brackets
Rthevehicle's seat belt system
RtheTopTether anchorages
Installing aLATCH-type (ISOFIX)childrestraintsystem is preferred.
Simply attachingtothe securingrings onthevehicle canreducetherisk of installingthechildrestraint system incorrectly.
When securing achild withthe integrated seatbelt oftheLATCH-type (ISOFIX)childrestraintsystem, always comply withthe permissiblegrossweightforthechild andchildrestraint sys‐tem (page54).
A booster seat may be necessarytoachieveproper seat belt positioningforchildrenover40 lbs (18kg) inweight or untiltheyreach aheight where athree-point seat belt can beinstalled properlywithout a booster seat.
Mercedes-Benzrecommends a suitablechildbooster seat with a backrest and seat belt guide.
Advantage of arearward-facingchildrestraint systemIt is preferabletotransporta baby or a smallchild in a suitablerearward-facingchildrestraintsystem. Inthis case,thechild sits inthe oppo‐
Occupant safety49

site directiontothe direction of travel andfacesbackwards.
Babies and smallchildren havecomparativelyweak neck muscles inrelationtothe size andweight oftheir head. Therisk of injurytothe cer‐vical spine during an accident can bereduced inarearward-facingchildrestraint system.
Always secure achildrestraint system cor‐rectly
\nWARNINGRisk of injuryor death causedbyincorrect installation ofthechildrestraint system
Ifthechildrestraint system is incorrectlyinstalled on a suitable seating position, itcannot performits intended protective func‐tion.
Thechild cannot berestrained intheevent ofan accident, heavy braking or a suddenchange of direction.
Always comply withthe manufacturer'sinstallation instructionsforthechildrestraint system and its correct use.
Makesurethatthe entire base ofthechildrestraint system alwaysrests onthe sitting surface ofthe seat.
Never place objects under or behindthechildrestraint system, e.g. cush‐ions.
Always usechildrestraint systems withthe original cover designedforthem.
Alwaysreplace damaged coverswithgenuine covers.
\nWARNINGRisk of injuryor death fromunsecuredchildrestraint systems inthevehicle
Ifthechildrestraint system is not correctlyinstalled or secured, it couldrelease intheevent of an accident, sudden braking or asuddenchange in direction.
Thechildrestraint system could beflungaround and hitvehicle occupants.
Always installchildrestraint systemscorrectly,even when not in use.
Always comply withthechildrestraintsystem manufacturer's installationinstructions.
RAlways observethechildrestraint systemmanufacturer's installation and operatinginstructions aswell asthevehicle-specificinformation:
-InstalltheLATCH-type (ISOFIX)childrestraint system ontherear seat(page54).
-Securethechildrestraint system withtheseat belt ontherear seat(page 58).
-Securethechildrestraint system withtheseat belt onthe front passenger seat(page 60). Observethe specificinstructionsfortherearward-facing andforward-facingchildrestraint systems(page 59).
Ifthe front passenger seat is occupied,ensure, bothbefore and duringthe jour‐ney,thatthestatus ofthe front
50Occupant safety

Overview of suitable seats inthevehiclefor installing achildrestraint system
Securing systemsforchildrestraint systems
Vehicle seat
Left/rightrear seatPreferred securing system:
LATCH-type (ISOFIX)child seat securing sys‐tem
Also secureTopTether if present(page 56)
Alternative securing system:
RVehicle seat belt
Front passenger seatSecuring system:
RVehicle seat belt
Be suretoobserve:
RIfthe front passenger seat is occupied, ensure,bothbefore and duringthe journey,thatthesta‐tus ofthe front passenger front airbag is correctforthe current situation (page44).
RNotes on automatic front passenger front airbagshutoff (page 43).
Centerrear seatSecuring system:
RVehicle seat belt
Occupant safety53

Activating/deactivating the seat belt'schildspecial seat beltretractor
\nWARNINGRisk of injuryor death if aseat belt is unfastened whilethevehicleis in motion
Ifthe seat belt isreleased whilethevehicle isin motion,thechildrestraint system is nolonger correctly secured. Thechild seatsafetyfeature is deactivated andthe seatbelt is drawn in a bitbythe inertiareel.
It istherefore not possibletoengagethe seatbelt again.
Pullover andstopthevehicle safely assoon as possible, paying attentiontoroad and traffic conditions.
Activatethechild seat safetyfeatureagain and correctly securethechildrestraint system.
When enabled,the special seat beltretractorensuresthatthe seat belts ofthe frontpassenger seat andrear seats do not slackenoncethechildrestraint system is secured.
The seat belts onthefollowing seats are equip‐ped with a special seat beltretractor:
RFront passenger seat
RRear seats
Toinstall achildrestraint system:wheninstalling achildrestraint system, alwaysobservethe manufacturer's installation andoperating instructions aswell asthe informa‐tion inthis Operator's Manual.Pullthe seat belt smoothly fromthe seat beltoutlet.
Engagethe seat belttongue inthe seat beltbuckle.Toactivatethe special seat beltretrac‐tor:pullthe seat belt out fully and lettheinertiareelretract it again.Whenthe special seat beltretractor is activa‐ted,you should hear aratcheting sound.
Pushthechildrestraint system down untilthe seat belt sits tightly.Todeactivate the special seat beltretrac‐tor:presstherelease button ofthe seat beltbuckle.
Holdthe seat belttongue and guide backtothe seat belt outlet.
InstallingtheLATCH-type (ISOFIX)childrestraint system ontherear seat
InstallingtheLATCH-type (ISOFIX)childrestraint system ontherear seat
\nWARNINGRisk of injuryiftherearbenchseat/rear seat and seat backrestare not engaged
Iftherear benchseat/rear seat and seatbackrest are not engagedtheycouldfoldfor‐wards, e.g. when braking suddenly or intheevent of an accident.
RIfthis isthe case,thevehicle occupantwould beforced intothe seat beltbytherear benchseat/rear seat orbythe seatbackrest. The seat belt cannotprotect asintended and couldresult in additionalinjury.
54Occupant safety

RObjects or loads inthe trunk/cargo com‐partment cannotberestrainedbytheseat backrest.
Make surethatthe seat backrest andtherear benchseat/rear seat areengaged beforeeverytrip.
Iftherear seat backrest is not engaged andlocked,thered lockverification indicator will bevisible.
\nWARNINGRisk of injuryor death ifthepermissible gross mass ofthechild andchildrestraint system isexceeded
ForLATCH-type (ISOFIX)childrestraint sys‐tems in whichthechild is secured usingtheintegrated seat belt inthechildrestraint sys‐tem,the permissible gross mass ofthechildandchildrestraint system is73lb (33kg).
Ifthechild andthechildrestraint systemtogetherweigh morethan73lb (33kg),theLATCH-type (ISOFIX)childrestraint systemwith integrated seat belt does not offer suffi‐
cient protection. Anexcessive load may beplaced ontheLATCH-type (ISOFIX)child seatattachments andthechild may not berestrained intheevent of an accident,forexample.
Ifthechild andthechildrestraint sys‐temtogetherweigh morethan73lb(33kg), useonly aLATCH-type (ISOFIX)childrestraint systemthat securesthechild withthevehicle seat belt.
Also securethechildrestraint systemwiththeTopTether belt, ifavailable.
Always comply withthe information aboutthemass ofthechildrestraint system:
Rinthe manufacturer's installation and operat‐ing instructionsforthechildrestraint systemused
Ron a label onthechildrestraint system, ifpresent
Regularlycheckthatthe permissible gross massofthechild andchildrestraint system isstillcomplied with.
Whenyou are installing achildrestraint system,observethefollowing:
sAlways observethe correct use andthe suit‐ability ofthe seatsfor attaching achildrestraint system.
sAlways comply withthe manufacturer'sinstallation and operating instructionsforthechildrestraint system used.
sMake surethatthechild'sfeetdo nottouchthe front seat. If necessary,movethe frontseatforward slightly.
Whenyou are installing aLATCH-type(ISOFIX)childrestraint system, observethefol‐lowing:
sWhenyou are using a Group 0/0+ babycar seat and a Group 1rearward-facingchildrestraint system on arear seat:adjustthe front seat sothatthe seat doesnottouchthechildrestraint system.
sWhenyou are using a Group 1forward-facingchildrestraint system:removetheheadrestraint fromtherespective seat, if
Occupant safety55

possible. In addition,the seat backrest ofthechildrestraint system must, asfar aspossible, lieflat againstthe backrest ofthevehicle seat.
Afterthechildrestraint system has beenremoved,replacethe headrestraints againimmediately and adjustthem correctly.
sFor certainchildrestraint systems inweightgroup 2 or 3,there may berestrictions inthe maximum size setting, e.g. duetopossi‐ble contact with theroof.
sThechildrestraint system must not beten‐sioned betweentheroof andthe seat cush‐ion and/or be installedfacingthe wrongdirection. Where possible, adjustthe seatcushion inclination accordingly.
sThechildrestraint system must not be putunderstrainbythe headrestraints.Adjustthe headrestraints accordingly.
1LATCH-type (ISOFIX) mounting bracket
Beforeevery trip, make surethattheLATCH-type(ISOFIX)childrestraint system is engaged cor‐rectly in bothmounting brackets inthevehicle.
NOTEBe careful nottodamagethe seatbeltforthe center seat when installingthechildrestraint system
Make surethatthe seat belt is not trap‐ped.
AttachtheLATCH-type (ISOFIX)childrestraint systemtobothmounting bracketsinthevehicle.
SecuringTopTether
\nWARNINGRisk of injuryor death iftherear seat backrests are not locked afterinstallingTopTether belts
Iftherear seat backrests are not locked,theycouldfoldforwards intheevent of an acci‐dent or during braking or suddenchanges ofdirection.
As aresult,childrestraint systems cannotperformtheir intended protective function.Rear seat backreststhat are not locked can
56Occupant safety