2017 MERCEDES-BENZ C-Class COUPE airbag off

tection in an accident. There is an increased
riskofi njury.
Hav ethe vehicl etowed to aquali fied special-
is tw orkshop in order to have adeployed air
ba gr eplaced.
It is important for your safety and thatofy our
passenge rtohaved eployed airb agsr eplaced
and to have any malfunctioning ai rbags
repaired .Thisw illh elptom akes uret he ai rbags
continue to perform their protective functio nfor
the vehicl eoccupants in the event of acrash.
GWARNING
Pyrotechni cEmergency Tensioning Devices
thath aveb eend eployed arenol ongero pera-
tional and ar eunabl etop erform their inten-
de dp rotective function. Thi sposes an
increasedr iskofi njury or eve nfatal injury.
Therefore ,havep yrotechni cEmergency Ten-
sioning Devices which have been triggered
immediatel yreplaced at aquali fied specialist
workshop.
An electri cmotorisu sedbyP RE-SAFE
®to trig-
ge rthe tightening of the seat belt in hazardous
situations. Thi sprocedur eisreversible.
If Emergency Tensioning Devices ar etriggered
or ai rbagsa redeployed ,you will hear abang,
and asmall amount of powder maya lsob e
released. The 6restraint systemw arning
lamp lights up.
Onlyinr arec ases will the bang affect your hear-
ing .The powder thati sreleasedg enerall ydoes
not constitute ahealth hazard, bu titmaycause
short-ter mbreathing difficultie sinpeoplewith
asthma or othe rrespiratory problems .Provided
it is safe to do so, yo ushoul dleave the vehicle
immediatel yoropent he windo winorder to pre-
vent breathing difficulties.
Air bags and pyrotechni cEmergency Tensioning
Devi ces (
ETDs) contain perchlorate material,
which mayr equire special handling and regard
for the environment. National guideline smust
be observe dduringd ispo sal. In California ,see
www.dtsc.ca.gov/HazardousWaste/
Perchlorate/index.cfm.
Methodofo peration
During the first stage of acollision, the restraint
systemc ontrolunite valuate simportant physi-
cal data relating to vehicl edeceleratio noraccel-
eration, such as:
Rduration
Rdirection
Rintensity
Based on the evaluation of thisd ata, the
restraint systemc ontrol unittriggers the Emer-
gency Tensioning Devices durin gafrontal or
rea rcollision.
An Emergency Tensioning Device can onl ybe
triggered ,if:
Rthe ignition is switched on
Rthe components of the restraint systema re
operational .You can fin dfurthe rinformation
under: "Restraint systemw arning lamp"
(
Ypage 41)
Rthe belt tongue is engaged in the buckle on
the respectiv efront-passenge rseat
The Emergency Tensioning Devices in the rear
compartment ar etriggered independentl yofthe
lock status of the seat belts.
If the restraint systemc ontrol unitdetects a
mor eseverea ccident, furthe rcomponents of
the restraint systema reactivated independ-
entl yofe acho the rinc ertainfrontal collision
situations:
RFron tairbags as well as driver's and front-
passenge rknee bags
RWindo wcurtai nairbag, if the systemd eter-
mines thatd eployment can offer additional
protection to thatp rovided bythe s
eat belt
The front-passenge rfront ai rbag is activated or
deactivated depending on the perso nonthe
front-passenge rseat. The front-passenge rfront
ai rb ag can onl ydeplo yinana ccident if the
PASSENGER AIR BAG ON indicator lamp is lit.
Observe the information on the PASSENGER AIR
BAG indicator lamps (
Ypage 42).
Your vehicl ehastwo-stage front ai rbags. During
the first deployment stage ,the front ai rbag is
fille dwithp ropellant ga storeduce the ris kof
injuries. Th efront ai rbag is full ydeployed with
the maximum amount of propellant ga sifasec-
ond deployment threshold is reache dwithina
few milliseconds.
The activatio nthreshold of the Emergency Ten-
sioning Devices and the ai rbag ared etermined
by evaluating the rate of vehicl edeceleratio nor
54Occupant safety
Safety

Display messagesPossible causes/consequences andMSolutions
FrontPassengerAir‐bag Disabled SeeOperator' sManual
The front-passenger fron tair bag and front-passenger knee bag are
deactivated during th ejou rney, although:
Ran adult
or
Rap erson of th ecorre spondin gstatur eisont hefront-passenger seat
If additional force sare applie dtotheseat ,the system may interpret
th eo ccupant's weigh taslower than it actually is.
GWARNIN G
The front-passenger fron tair bag and front-passenger knee bag are
no ttriggered in th eevent of an accident.
There is an increased ris kofinjury.
XPull ove rand stop th evehicl esafely as soo naspossible, payin g
attention to roa dand traffic conditions.
XSecur ethe vehicl eagainst rollin gaway (Ypage 152).
XSwitc hthe ignition off .
XHavethe occupant get out of th evehicle.
XKee pthe seat unoccupied ,close th efront-pa ssenger door and
switch on th eignition .
XObserv ethe PASSENGER AI RBAG indicator lamp sinthecenter
console and th emultifunction display and chec kthe following:
Seat unoccupied and ignition switched on :
Raself-diagnosis is carrie dout.T he PASSENGER AI RBAG OFFa nd
PASSENGER AI RBAG ON indicator lamp smustligh tups imulta-
neousl yfor approximately six seconds
RtheP ASSENG ER AIRBAG OFFindicator lamp mus tthe nl ightup
and remain lit after th eself-diagnosis .Iftheindicator lamp is on ,
OCS (Occupant Classification System) has disabled th efront -
passenger fron tair bag and front-passenger knee bag
(
Ypage 49)
Rth ed isplay message sFront Passenger Airbag Enable dSee Operator'sManualorFront Passenger Airbag Dis ‐abled See Operator'sManualmus tnotappear in th emulti-
function display.
XWait for aperiod of at least 60 seconds until th eneces sarysystem
checks hav ebeen completed.
XMak esuret hatthe display message sdonotappear in th emulti-
function display.
If these condition sare fulfilled ,the front-passenger seat can be occu-
pied again .Whether th ePASSENG ER AIRBAG OFForONi ndicator
lamp remain slit or goe sout depend sonhow OCS classifies th eoccu-
pant.
If th econditi onsa re no tfulfilled ,the system is no toperating correctly.
XVisit aqualified specialist workshop immediately.
Fo rfurther information about th eOccupant Classification System, see
(
Ypage 49) .
Display messages229
On-boardc omputer andd isplays
Z

Display messagesPossible causes/consequences andMSolutions
FrontPassengerAir‐bag Enable dSeeOperator' sManual
The front-passenger fron tair bag and front-passenger knee bag are
enabled during th ejou rney, although:
Rac hild, asmall adult or an objec tweighing less than th esystem' s
weigh tthreshold is locate donthefront-passenger seat
or
Rth ef ront-pa ssenger seat is unoccupied
The system may detec tobjects or force sapplyin gadditional weigh ton
th es eat .
GWARNIN G
The front-passenger fron tair bag and th efront-pa ssenger knee bag
may be triggered unintentionally.
There is an increased ris kofinjury.
XPull ove rand stop th evehicl esafely as soo naspossible, payin g
attention to roa dand traffic conditions.
XSecur ethe vehicl eagainst rollin gaway (Ypage 152).
XSwitc hthe ignition off .
XOpenthe front-passenger door .
XRemove thechild and th echild restrain tsystem from th efront -
passenger seat .
XMakesuret hatthe re are no objects on th eseat addin gtothe
weight.
The system may otherwise detec tthe additional weigh tand inter-
pre tthe seat occupant's weigh tasgreatertha nita ctually is.
XKeepthe seat unoccupied ,close th efront-pa ssenger door and
switch on th eignition .
XObserv ethe PASSENGER AI RBAG indicator lamp sinthecenter
console and th emultifunction display and chec kthe following:
Seat unoccupied and ignition switched on :
Raself-diagnosis is carrie dout.T he PASSENGER AI RBAG OFFa nd
PASSENGER AI RBAG ON indicator lamp smustligh tups imulta-
neousl yfor approximately six seconds
RtheP ASSENG ER AIRBAG OFFindicator lamp mus tthe nligh tup
and remain lit after th eself-diagnosis .Iftheindicator lamp is on ,
OCS has deactivated th efront-pa ssenger fron tair bag and front-
passenger knee bag (
Ypage 49)
Rthed isplay message sFront Passenger Airbag Enable dSee Operator'sManualorFront Passenger Airbag Dis ‐abled See Operator'sManualmus tnotappear in th emulti-
function display.
XWait for aperiod of at least 60 seconds until th eneces sarysystem
checks hav ebeen completed.
XMak esuret hatthe display message sdonotappear in th emulti-
function display.
If these condition sare fulfilled ,the front-passenger seat can be occu-
pied again .Whether th ePASSENG ER AIRBAG OFForONi ndicator
lamp remain slit or goe sout depend sonhow OCS classifies th eoccu-
pant.
230Display messages
On-boardc omputer andd isplays