2014 MERCEDES-BENZ CLS warning

If you sell yourvehicle, it is important that you
make the buyer aware of this safety
information.Besure to give the buyer this
Operator's Manual.
If the air bags are deployed, you will hear a
bang, andasmall amount of powder may also
be released. Only in rare cases will the bang
affect your hearing. The powder that is
released generally does not constitute a
health hazard and does not indicatethat there
isafire in the vehicle. The dust might cause
some temporary breathingdifficulty for
people with asthma or other breathing
trouble. To avoid this, you may wish to get out
of the vehicle as soon as it is safe to do so.
You can also open the window to allow fresh
air to enter the vehicle interior. TheSRS
warning lamp lights up.
The air bag installation locationsare
identified by the AIR BAG symbol.
The air bags are deployed if the air bag control
unit detects the need for deployment. Only in
the event of suchasituation will the air bags
provide their supplemental protection.
If the driver and frontpassenger do notwear
their seat belts, it is not possible for the air
bags to provide their supplemental
protection.
In the event of other types of impacts and
impacts below air bag deployment
thresholds, the air bags will not deploy. The
driver and passenger will then be protected
to the extent possible byaproperly fastened
seat belt.Aproperlyfastened seat beltisalso
needed to provide the best possible
protection inarollover.
Air bags provide additional protection; they
are not, however,asubstitute for seat belts.
All vehicle occupants must fasten their seat
belts regardless of whether your vehicle is
equipped with air bags or not.
It is important for your safety and that of your
passenger to have deployed air bags replaced
and to have any malfunctioning air bags
repaired. This will help to make sure the air
bags continue to perform their protective
function for the vehicle occupants in the
event ofacrash.
iAfter an air bag has been deployed, have
the vehicle towed to the nearest qualified
specialist workshop, even if your vehicle is
ready to drive.
Front air bags
Driver's air bagdeploysinfront of the
steering wheel; front-passenger front air
bagdeploysinfront of and above the glove
box.
The front air bags increase protection for the
driver's and front passenger's head and
chest.
They are deployed:
Rat the start of an accident withahigh rate
of vehicle acceleration or deceleration in a
longitudinal direction
Rin the event of certain frontal impacts
Rif the system determines that air bag
deployment can offer additional protection
to that provided by the seat belt
Rdepending on whether the seat belt is being
used
Rindependently of other air bags in the
vehicle
If the vehicle rolls over, the front air bags are
generally not deployed.
Your vehicle has adaptive, two-stage front air
bags. The air bag control unit evaluates
vehicle deceleration or acceleration in the
event ofacollision. In the first deployment
stage, the front air bag is filled with part of the
44Occupant safety
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totalavailablepropellant gas, thereby
reducing the risk of injury.Ifthe airbag
control unitrecognizeswithinafew
milliseconds thatthe vehicle is being braked
or accelerated faster than originally
predicted, the front air bag is filled with the
maximum amount of propellant gas available.
The deployment of the front-passenger front
air bag is also influenced by the weight
category of the front passenger, which is
determined by the Occupant Classification
System (OCS) (Ypage 47).
The lighter the passenger-side occupant, the
higher the vehicle deceleration rate required
(predicted at the start of the impact) for
second-stage inflation of the front-passenger
front air bag. In the second stage, the front
air bags are inflated with the maximum
amount of propellant gas available.
The front air bags are not deployed in
situations wherealow impact severity is
predicted. You will then be protected by the
fastened seat belt.
The front-passenger front air bag will only
deploy if:
Rthe system, based on the OCS weight
sensor readings, detectsthat the front-
passenger seat is occupied
Rthe PASSENGER AIR BAG OFF indicator
lamp on the center console is not lit
(Ypage 47)
Rthe air bag control unit predictsahigh
impact severity
Knee bags
Driver's knee bagdeploysunderneath the
steering column and front-passenger knee
bagunderneath the glove box. They
deploy together with the front air bags. They
are designed to operate together with the
front air bags in frontal impacts if certain
thresholds are exceeded. The knee bags
operate at best in conjunction with correctly
positioned and fastened seat belts.
Knee bags provide increased protection for
the driver and front passenger against the risk
of:
Rknee injuries
Rthigh injuries
Rlower leg injuries
Side impact air bags
GWARNING
Using unsuitable seat covers could restrict or
even prevent deployment of the air bags
integrated into the seats. Consequently, the
air bags cannot protect vehicle occupants as
they are designed to do. In addition, the
function of the air bag deactivation system
could be restricted. This poses an increased
risk of injury or even fatal injury.
You should only use seat covers that have
been approved for the respective seat by
Mercedes-Benz.
GWARNING
Sensors to control the air bags are located in
the doors. Modifications or work not
performed correctly to the doors or door
paneling, as well as damaged doors, can lead
to the function of the sensors being impaired.
The air bags might therefore not function
properly any more. Consequently, the air bags
cannot protect vehicle occupants as they are
designed to do. There is an increased risk of
injury.
Never modify the doors or parts of the doors.
Always have work on the doors or door
paneling carried out ataqualified specialist
workshop.
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You should only use seat cover that have been
approved for your vehicle by Mercedes-Benz.
The seat covers must haveaspecial tear
seam for side impact air bags. Otherwise, the
side impact air bags cannot deploy correctly
and therefore cannot provide the intended
protection in the eventofanaccident.
Front side impact air bagsand rear side
impact air bagsdeploy nexttothe outer
seat cushions.
When deployed, the side impact air bags offer
additional protection for the thorax of the
vehicle occupantsonthe side of the vehicle
on which the impact occurs. However, they
do not protectthe:
Rhead
Rneck
Rarms
The side impact air bags are deployed:
Ron the side on which an impact occurs
Rat the start of an accident withahigh rate
of lateral vehicle deceleration or
acceleration, e.g. inaside impact
Rindependently of the use of the seat belt
Rindependently of the front air bags
Rindependently of the ETDs
If the vehicle rolls over,the side impact air
bags are generally not deployed. Side impact
air bags are deployed if the system detects
high vehicle deceleration or acceleration in a
lateral direction and determines that side
impact air bag deploymentcan offer
additional protection to that providedbythe
seat belt.
Sideimpactair bags will not deploy in side
impacts which do not exceed the system's
presetdeployment thresholds for lateral
acceleration/deceleration.You will then be
protected by the fastened seat belt.
The side impact air bag on the front-
passenger side is not deployed in the
following situations:
ROCS has detected that the front-passenger
seat is unoccupied.
Rthe front-passenger seat belt is not
fastened.
The side impact air bag on the front-
passenger side will deploy if the front-
passenger seat belt is fastened, regardless of
whether the front-passenger seat is occupied
or not.
Pelvis air bags
GWARNING
Only use seat covers which have been tested
and approved by Mercedes-Benz for your
vehicle model. Using seat covers or other seat
coverings can causeamalfunction of the side
impact air bags and/or the pelvis air bags.
Contact an authorized Mercedes-Benz Center
for availability.
Pelvis air bagsenhancethe level of
protection of the vehicle occupantsonthe
side of the vehicle on which the impact
occurs.
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The pelvis air bags deploy next to and below
the outer seat cushions. They are deployed:
Ron the side on which an impact occurs
Rat the start of an accident withahigh rate
of lateral vehicle deceleration or
acceleration,e.g. inaside impact
Rindependently of the use of the seat belt
Rindependently of the front air bags
Rindependently of the ETDs
If the vehicle rolls over,the pelvis air bags are
generally not deployed. Exception: if the
system detectshigh vehicle deceleration or
acceleration inalateral direction and
determines that deploymentcan offer
additional protection to that providedbythe
seat belt.
Pelvis air bagswill notdeploy in side
impacts which do not exceed the system's
preset deployment thresholds for lateral
acceleration/deceleration.You will then be
protected by the fastened seat belt.
The pelvis air bag on the front-passenger side
is not deployed in the following situations:
ROCS has detected that the front-passenger
seat is unoccupied.
Rthe front-passenger seat belt is not
fastened.
The pelvis air bag on the front-passenger side
will deploy if the front-passenger seat belt is
fastened, regardless of whether the front-
passenger seat is occupied or not.
Window curtain air bags
Window curtain air bagsenhancethe level
of protection for the head, but not chest or
arms, of the vehicle occupantsonthe side of
the vehicle on which the impact occurs.
The window curtain air bags are integrated
into the side of the roof frame and deploy in
the area from the A-pillar to the C-pillar.
Window curtain air bags are deployed:
Rat the start of an accident withahigh rate
of lateral vehicle deceleration or
acceleration, e.g. inaside impact
Ron the side on which an impactoccurs
Ron the driver'ssideand passenger side, in
the event ofavehiclerollover and if the
system determinesthat airbag deployment
can offer thevehicle occupants additional
protection to that providedbytheseat belt
Rindependently of theuse of theseat belt
Rregardless of whether thefront-passenger
seat is occupied
Rindependently of thefrontair bags
Windowcurtain air bagswill not deploy in
the eventofimpacts which do not exceed the
system'spresetdeployment thresholds for
vehicle acceleration/deceleration. You will
then be protected by the fastened seat belt.
Occupant Classification System
(OCS)
Method of operation
GWARNING
If theindicator lamp illuminates
when an adult or someone larger thanasmall
individual is in the front-passenger seat, have
the front passenger reposition himself or
herself in the seat until the
indicator lamp goes out.
In the event ofacollision, the air bag control
unit will not allow front-passenger front air
bag deployment when the OCS has classified
the front-passenger seat occupant as
weighing as much as or less thanatypical 12-
month-old child inastandard child restraint
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or if the front-passenger seat is classified as
being empty.
When the OCS senses that the front-
passenger seat occupant is classified as
being up to or less than the weight ofatypical
12-month-old child inastandard child
restraint,theindicator lamp will
illuminate when the engine is started and
remain illuminated, indicating that the front-
passenger front air bag is deactivated.
When the OCS senses that the front-
passenger seat is classified as being empty,
theindicator lamp will illuminate
when the engine is started and remain
illuminated, indicating that the front-
passenger front air bag is deactivated.
When the OCS senses that the front-
passenger seat occupant is classified as
being heavier than the weight ofatypical 12-
month-old child seated inastandardchild
restraint or as beingasmall individual (such
asayoung teenager orasmall adult), the
indicator lamp willilluminate for
approximately6seconds when the engine is
started and then,depending on occupant
weight sensor readings from the front-
passenger seat, remain illuminated or go out.
With theindicator lamp
illuminated, the front-passenger frontair bag
is deactivated. With theindicator
lamp out, the front-passengerfront air bag is
activated.
When the OCS senses that the front-
passenger seat occupant is classifiedasan
adult or someone larger thanasmall
individual, theindicator lamp will
illuminate for approximately6seconds when
the engine is started and then go out,
indicating that the front-passenger frontair
bag is activated.
If theindicator lamp is illuminated,
the front-passenger frontair bag and the
front-passenger knee bag are deactivated and
will not be deployed.
If theindicator lamp is not
illuminated, the front-passenger frontair bag
and the front-passengerknee bagare
activatedand will be deployed:
Rin the event of certain frontalimpacts
Rif impact exceedsapreset deployment
threshold
Rindependentlyofthe side impact airbag or
pelvis air bag
If thefront-passenger frontair bag is
deployed, therateofinflation will be
influenced by:
Rtherateofrelevantvehicle deceleration as
assessed by the air bag control unit
Rthe frontpassenger's weightcategoryas
identified by OCS
GWARNING
Accordingtoaccidentstatistics, childrenare
saferwhen properly restrained on the rear
seats than on the front-passenger seat. Thus,
we strongly recommendthat children be
placed in the rear seats whenever possible.
Regardless of seating position, children 12
years old and under must be seated and
properly secured in an appropriate infant
restraint,toddler restraint,orbooster seat
recommended for the size and weight of the
child.
The infant or child restraint must be properly
secured with the vehicle's seat belt, the seat
belt and Top Tether strap, or lower LATCH-
type (ISOFIX) child seat retaining loops and
Top Tether strap, fully in accordance with the
infant or child seat manufacturer's
instructions.
Occupants, especially children, should always
sit as upright as possible, wear the seat belt
properly and use an appropriately sized infant
restraint,toddler restraint,orbooster seat
recommended for the size and weight of the
child.
Children can be killed or seriously injured by
an inflating air bag.
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Note the following important information if it
is necessary to carryachild on the front-
passenger seat:
RYour vehicle is equipped with air bag
technology designed to deactivate the
front-passenger front air bag and the front-
passenger knee bag in yourvehicle when
the system senses the weight ofatypical
12-month-old child or less along with the
weight ofastandardappropriate child
restraint on the front-passenger seat.
RAchild inarear-facing child restraint on the
front-passenger seat will be seriously
injured or even killed if the front-passenger
front air bag inflates inacollision which
could occur under some circumstances,
even with the air bag technology installed
in your vehicle. The only means to eliminate
this risk completely is never to placeachild
inarear-facing child restraint in the front-
passenger seat. We therefore strongly
recommendthat you always placeachild
inarear-facing child restraint on the rear
seat.
RIf you installarear-facing child restraint on
the front-passenger seat, make sure the
indicator lamp is illuminated,
indicating that the front-passenger front air
bag and front-passenger knee bag are
deactivated. Should the
indicator lamp not illuminate or go out while
the restraint is installed, please check
installation. Periodicallycheck the
indicator lamp while driving to
make sure that theindicator
lamp is illuminated. If the
indicator lamp goes out or remains out, do
not transportachild on the front-passenger
seat until the system has been repaired.
Achild inarear-facing child restraint on the
front-passenger seat could be seriously
injured or even killed if the front-passenger
front air bag is deployed.
RIf you placeachild inaforward-facing child
restraint on the front-passenger seat:
-move the seat as far back as possible
-use the proper child restraint
recommended for the age, size and
weight of the child
-secure child restraint with the vehicle's
seat belt according to the child seat
manufacturer's instructions
RFor children larger than the typical 12-
month-old child, the front-passenger front
air bag and the front-passenger knee bag
may or may not be activated.
GWARNING
If the redSRS warning lamp in the
instrumentcluster and the
indicator lamp light up simultaneously,the
OCS is malfunctioning. The front passenger
front air bag and the front passenger knee bag
will be deactivated in this case. Have the
system checked by qualified technicians as
soon as possible. Contact an authorized
Mercedes-BenzCenter.
Only have the seat repaired or replaced at an
authorized Mercedes-BenzCenter.
In order to ensure proper operation of the air
bag system and OCS:
RSit with the seat belt properly fastened in a
position that is as upright as possible with
your back against the seat backrest.
RWhen seated,apassenger should not
position him/herself in suchaway as to
cause the passenger'sweight to be lifted
from the seat cushion as this may result in
the OCS being unable to correctly
approximatethe passenger'sweight
category.
RRead and observe all warnings in this
chapter.
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If the SmartKey is removed from the ignition
lock or is in position0,PASSENGER AIR BAG
OFF indicator lampdoes not light up.
The Occupant Classification System (OCS)
categorizesthe occupant on the front-
passengerseat usingaweight sensor.The
front-passenger front air bag is deactivated
automatically for certain weight categories.
The PASSENGER AIR BAG OFF indicator lamp
shows you the current status.
Occupant Classification System (OCS)
categories the occupant on the front-
passenger seat usingaweight sensor.
The front-passenger front air bag and the
front-passenger knee bag are deactivated
automatically for certain weight categories.
The PASSENGER AIR BAG OFF indicator lamp
shows you the current status.
If the PASSENGER AIR BAG OFF indicator
lamp lights up, the front-passenger front air
bag and the front-passenger knee bag are
disabled.
The system does not deactivate:
Rthe side impact air bag
Rthe pelvis air bag
Rthe window curtain air bag
Rthe Emergency Tensioning Devices
To be classified correctly, the front passenger
must sit:
Rwith the seat belt fastened correctly
Rinaposition that is as upright as possible
with their back against the seat backrest
Rwith their feet on the floor
The OCS weight sensor reading is affected if
the occupant's weight is transferred, e.g. by
leaning on the armrest.
If the front-passenger seat, the seat cover or
the seat cushion are damaged, have the
necessary repair work carried out at a
qualified specialist workshop.
For safety reasons, Mercedes-Benz
recommends that you only use seat
accessories that have been approved by
Mercedes-Benz.
Both the driver and the front passenger
should always observe the PASSENGER AIR
BAG OFF indicator lamp as an indication of
whether or not the front passenger is
positioned correctly. Observe also the air bag
displaymessages that can be displayed in the
instrumentcluster (Ypage 244).
If the driver's air bag deploys, this does not
mean that the front-passenger front air bag
will also deploy.
The OCS may have detected that the seat:
Ris empty or occupied by the weight of a
typical child up to twelve months old,
seated inachild restraint system
Ris occupied byasmall individual, such as a
young teenager orasmall adult
Ris occupied byachild inachild restraint
system whose weight is greater than that
ofatypical twelve monthold child.
These are examples of when the OCS
deactivates the front-passenger front air bag
and front-passenger knee bag. Deactivation
takes place although the collision fulfills the
criteria for deploying the driver's air bag.
For further information,see "Air bag display
messages" (Ypage 244).
System self-test
GWARNING
If theindicator lamp does not
illuminate, the system is not functioning. You
must contactanauthorized Mercedes-Benz
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Centerbefore seating any child on the front
passenger seat.
GWARNING
Objects between the seat surface and the
child restraint system could affect the
function of the OCS. This could result in the
front-passenger frontair bag not functioning
as intended during an accident. This poses an
increased risk of injury or even fatal injury.
Do not place any objects between the seat
surface and the child restraint system. Make
sure that the bottom and back of the child
restraint system make full contact with the
front-passenger seat cushion and backrest.
Always comply with the child restraint system
manufacturer's installation instructions.
The PASSENGER AIR BAG OFF indicator lamp
lights up:
Rif you turn the SmartKey in the ignition lock
to position1or2
Rif you press the KEYLESS-GO Start/Stop
button onceortwice on vehicles with
KEYLESS-GO
Rif an adult is seated properly on the front-
passenger seat and the OCS classifies the
occupant as an adult
The PASSENGER AIR BAG OFF indicator
lamp goes out again after approximately six
seconds.
If the seat is not occupied and the OCS
system detects that the front-passenger
seat is empty, the PASSENGER AIR BAG
OFF indicator lamp will continue to light up.
The PASSENGER AIR BAG OFF indicator
lamp will not go out.
For more information about the OCS, see
"Problems with the Occupant Classification
System"(Ypage 52).
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