Get Safety -> Occupant safety Guide for Mercedes A Class 4 Door Third Generation (2012-2017)

Occupant safety

40

Useful information

Occupant safety

Introduction to the restraint system

i This Owner's Manual describes all mod-

els, series and optional equipment for your

vehicle that were available at the time of

going to press. National variations are pos-

sible. Note that your vehicle may not be

equipped with all of the functions descri-

bed. This is also the case for systems and

functions relevant to safety.

The restraint system can reduce the risk of

vehicle occupants coming into contact with

parts of the vehicle's interior in the event of

an accident. The restraint system can also

reduce the forces to which vehicle occupants

are subjected during an accident.

The restraint system comprises:

i Read the information on qualified special-

ist workshops: (Y page 24).

R

Seat belt system

Airbags

R

Child restraint system

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Child seat securing systems

Panic alarm

The components of the restraint system work

in conjunction with each other. They can only

deploy their protective function if all vehicle

occupants always:

R

fasten their seat belts correctly

(Y page 44)

R

adjust their seat and head restraint prop-

erly (Y page 107).

As the driver, you also have to make sure that

the steering wheel is adjusted correctly.

Observe the information relating to the cor-

rect driver's seat position (Y page 106).

You also have to make sure that an airbag can

inflate properly if deployed (Y page 46).

An airbag supplements a correctly fastened

seat belt. As an additional safety device, the

airbag increases the level of protection for

vehicle occupants in the event of an accident.

For example, if the protection of the seat belt

is sufficient in an accident, the airbags are not

deployed. In the event of an accident, only the

airbags that increase protection in the rele-

vant accident situation are deployed. How-

ever, seat belts and airbags generally do not

protect against objects penetrating the vehi-

cle from the outside.

X

To activate: press and hold the

! button : for approx. one second.

A visual and audible alarm is triggered if the

alarm system is primed.

To deactivate: press the ! button :

again.

X

or

X

Insert the key into the ignition lock.

or, on vehicles with KEYLESS-GO start func-

tion or KEYLESS‑GO

X

Press the Start/Stop button.

The key must be in the vehicle.

The panic alarm function is only available in

certain countries.

Information on the restraint system operation

can be found under "Triggering of belt ten-

sioners and airbags" (Y page 55).

Occupant safety

41

For more information about children travel-

ling with you in the vehicle, see "Children in

the vehicle" (Y page 57).

WARNING

G

If the restraint system is malfunctioning,

restraint system components may be trig-

gered unintentionally or might not be trig-

gered at all in the event of an accident with a

high rate of vehicle deceleration. This can

effect belt tensioners or airbags, for example.

There is an increased risk of serious or even

fatal injuries.

Important safety notes

WARNING

G

If the restraint system is modified, it may no

longer work as intended. The restraint system

may then not perform its intended protective

function by failing in an accident or triggering

unexpectedly, for example. There is an

Have the restraint system checked and

repaired immediately at a qualified specialist

workshop.

increased risk of injury, possibly even fatal.

Never modify parts of the restraint system. Do

not attempt to modify the wiring as well as

electronic components or their software.

PASSENGER AIRBAG indicator lamp

If it is necessary to modify an airbag system to

accommodate a person with disabilities, con-

tact a Mercedes-Benz Service Centre for

details.

Restraint system warning lamp

The functions of the restraint system are

checked after the ignition is switched on and

at regular intervals while the engine is run-

ning. Therefore, malfunctions can be detec-

ted in good time.

The 6 restraint system warning lamp in

the instrument cluster lights up when the igni-

tion is switched on. It goes out no later than a

few seconds after the vehicle is started. The

components of the restraint system are in

operational readiness.

PASSENGER AIR BAG ON indicator lamp :

and PASSENGER AIR BAG OFF indicator

lamp ; are part of the automatic deactiva-

tion system of the front-passenger front air-

bag.

The indicator lamps display the status of the

front-passenger front airbag.

R

PASSENGER AIR BAG ON lights up: the

front-passenger front airbag is enabled. If,

in the event of an accident, all deployment

criteria are met, the front-passenger front

airbag is deployed.

A malfunction has occurred if the 6

restraint system warning lamp:

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does not light up after the ignition is

R

PASSENGER AIR BAG OFF lights up: the

switched on

front-passenger front airbag is disabled. It

will then not be deployed in the event of an

accident.

R

does not go out after a few seconds with

the engine running

lights up again while the engine is running

R

Z

Occupant safety

42

Depending on the person in the front-

vehicle occupants in the event of a collision or

passenger seat, the front-passenger front air- if the vehicle overturns. This reduces the risk

bag must either be disabled or enabled; see of vehicle occupants coming into contact with

the following points. You must make sure of parts of the vehicle interior or being ejected

this both before and during a journey.

from it. The seat belt also helps to keep the

vehicle occupants in the best position in rela-

tion to the airbag being deployed.

R

Children in a rearward-facing child

restraint system: the PASSENGER AIR

BAG OFF indicator lamp must be lit. The

front-passenger front airbag is disabled. It

is imperative to observe the notes on the

"Automatic front-passenger front airbag

deactivation system" (Y page 49) and on

"Children in the vehicle" (Y page 57).

The seat belt system consists of:

R

seat belts

R

belt tensioners for the front seat belts and

the outer seat belts in the rear

R

belt force limiters for the front seat belts

and the outer seat belts in the rear

R

Children in a forward-facing child

If the seat belt is pulled quickly or sharply

from the belt outlet, the inertia reel locks. The

belt strap cannot be pulled out any further.

The belt tensioner tightens the seat belt in the

event of a collision so that it fits tightly across

your body. However, it does not pull the vehi-

cle occupants back in the direction of the seat

backrest.

The belt tensioner does not, however, correct

an incorrect seat position or correct the rout-

ing of a seat belt that is worn incorrectly.

When triggered, seat belt force limiters help

to reduce the peak force exerted by the seat

belt on the vehicle occupant.

restraint system: depending on the instal-

led child restraint system and the age and

size of the child, the front-passenger front

airbag is either disabled or enabled. There-

fore, it is imperative to observe the notes

on the "Automatic front-passenger front

airbag deactivation system" (Y page 49)

and on "Children in the vehicle"

(Y page 57).

R

All other persons: the PASSENGER AIR

BAG ON indicator lamp must be lit. The

front-passenger front airbag is enabled.

Depending on the build of the person on the

front-passenger seat, the PASSENGER AIR

BAG OFF indicator lamp may light up. The

front-passenger front airbag is disabled. It

will then not be deployed in the event of an

accident. In this case, the front-passenger

seat should not be used.

The belt force limiters on the front seats are

synchronised with the front airbags, which

take on a part of the deceleration force. This

can reduce the forces to which the vehicle

occupants are subjected during an accident.

It is imperative to observe the notes on the

"Automatic front-passenger front airbag

deactivation system" (Y page 49) as well

as on "Seat belts" (Y page 42) and "Air-

bags" (Y page 46). There you can also find

information on the correct seat position.

! If the co-driver's seat is not occupied, do

not engage the seat belt tongue in the

buckle on the co-driver's seat. Otherwise,

the belt tensioner could be triggered in the

event of an accident and would have to be

replaced.

Important safety notes

Seat belts

WARNING

G

Introduction

The seat belt cannot perform its intended pro-

tective function if it is not fastened correctly.

Also, an improperly fastened seat belt can

A correctly worn seat belt is the most effec-

tive means of restraining the movement of

Occupant safety

43

front airbag deactivation system

(Y page 49)

always observe the instructions and safety

notes on "Children in the vehicle" in this

Owner's Manual (Y page 57) in addition

to the child restraint system manufactur-

er's installation instructions

cause additional injuries in the event of an

accident, sudden braking or abrupt changes

of direction. There is an increased risk of

injury, possibly even fatal.

Always make sure that all vehicle occupants

are wearing their seat belt properly and are

seated correctly.

R

WARNING

G

Seat belts cannot protect as intended, if:

WARNING

G

The seat belt does not offer the intended level

of protection if you have not moved the back-

rest to an almost vertical position. When brak-

ing or in the event of an accident, you could

slide underneath the seat belt and sustain

abdomen or neck injuries, for example. This

poses an increased risk of injury or even fatal

injury.

Adjust the seat properly before beginning

your journey. Always ensure that the backrest

is in an almost vertical position and that the

shoulder section of your seatbelt is routed

across the centre of your shoulder.

R

they are damaged, have been modified, are

extremely dirty, bleached or dyed

the seat belt buckle is damaged or

extremely dirty

modifications have been made to the belt

tensioners, belt anchorages or inertia reels

R

Seat belts may sustain non-visible damage in

an accident, e.g. due to glass splinters. Modi-

fied or damaged seat belts can tear or fail, for

example in the event of an accident. Modified

seat belt tensioners may be deployed unin-

tentionally or fail to be deployed when

required. There is an increased risk of injury,

possibly even fatal.

WARNING

G

Persons under 1.50 m tall cannot wear the

seat belts correctly without a suitable, addi-

tional restraint system. The seat belt cannot

perform its intended protective function if it is

not fastened correctly. Also, an improperly

fastened seat belt can cause additional inju-

ries in the event of an accident, sudden brak-

ing or abrupt changes of direction. There is an

increased risk of injury, possibly even fatal.

Never modify safety belts, seat belt tension-

ers, seat belt anchorages and inertia reels.

Ensure that seat belts are not damaged or

worn and are clean. After an accident, have

the seat belts checked immediately at a quali-

fied specialist workshop.

Mercedes-Benz recommends that you only

use seat belts which have been approved

specifically for your vehicle by Mercedes-

Benz. Otherwise, your vehicle's general oper-

ating permit could be invalidated.

Secure persons less than 1.50 m tall in a suit-

able restraint system.

If a child younger than twelve years old and

under 1.50 m in height is travelling in the

vehicle:

Sports seat or AMG Performance seat: this

seat is designed for the standard three-point

seat belt. If you fit another multipoint seat

belt, e.g. sport or racing seat belts, the

restraint system cannot provide the best level

of protection.

R

always secure the child in a child restraint

system suitable for this Mercedes-Benz

vehicle. The child restraint system must be

appropriate to the age, weight and size of

the child.

WARNING

G

If you feed seat belts through the opening in

the seat backrest, the seat backrest may be

damaged or may even break in the event of an

R

always observe the instructions and safety

notes on the automatic front-passenger

Z

Occupant safety

44

Infants and children must never travel sit-

ting on the lap of a vehicle occupant. In the

event of an accident, they could be crushed

between the vehicle occupant and seat

belt.

accident. This poses an increased risk of

injury or even fatal injury.

Only use the standard three-point seat belt.

Never modify the seat belt system.

R

objects are never secured with a seat belt if

the seatbeltis alsobeing usedby one ofthe

vehicle's occupants

Also ensure that no objects are placed

between a person and the seat. e.g. a cush-

ion.

Correct seat belt use

Observe the safety notes on the seat belt

(Y page 42).

All vehicle occupants must be wearing the

seat belt correctly before beginning the jour-

ney. Also make sure that all vehicle occu-

pants are always wearing the seat belt cor-

rectly while the vehicle is in motion.

When fastening the seat belt, always make

sure that:

Seat belts are only intended to secure and

restrain vehicle occupants. Always observe

the "Loading guidelines" for securing objects,

luggage or loads (Y page 306).

Fastening and adjusting the seat belts

R

the seat belt tongue is only inserted into the

belt buckle belonging to that seat

the seat belt is tight across your body

Avoid wearing bulky clothing, e.g. a winter

coat.

Observe the safety notes on the seat belt

(Y page 42) and the information on the cor-

rect use of the seat belt (Y page 44).

R

the seat belt is not twisted

Only then can forces which occur be dis-

tributed across the surface of the seat belt.

R

the shoulder section of the belt is always

routed across the centre of your shoulder

The shoulder section of the seat belt should

not touch your neck nor be routed under

your arm. If possible, adjust the seat belt to

the appropriate height.

R

the lap belt passes across your lap as

tightly and as low down as possible

The lap belt must always be routed across

your hip joints and never across your abdo-

men. This applies particularly to pregnant

women. If necessary, press the lap belt

down into your hip joints and pull tight with

the shoulder section of the belt.

the seat belt is not routed across sharp,

pointed or fragile objects

If you have such items located on or in your

clothing, e.g. pens, keys or spectacles,

store these in a suitable place.

Basic illustration

X

Adjust the seat (Y page 106).

The seat backrest must be in an almost

vertical position.

R

X

Pull the seat belt smoothly from belt outlet

=.

X

Engage seat belt tongue ; in belt

buckle :.

The seat belt on the driver's seat and the

front-passenger seat may be tightened

R

only one person is using a seat belt

Occupant safety

45

automatically; see "Belt adjustment"

(Y page 45).

X

If necessary, pull upwards on the shoulder

section of the seat belt to tighten the belt

across your body.

Basic illustration

The shoulder section of the seat belt must

always be routed across the centre of the

shoulder. Adjust the belt outlet if necessary.

X

Press release button :, hold belt

tongue ; firmly and guide it back towards

belt outlet =.

X

To raise: slide the belt outlet upwards.

The belt outlet will engage in various posi-

tions.

Seat belt adjustment

The seat-belt adjustment is an integral part of

the PRE-SAFE^®convenience function. This

function adjusts the driver's and front-

passenger seat belt to the upper body of the

occupants.

X

To lower: hold belt outlet release ? and

slide belt outlet downwards.

Let go of belt outlet release ? in the

desired position and make sure that the

belt outlet engages.

X

The belt strap is tightened slightly when:

R

the seat belt tongue is engaged in the belt

buckle and

Releasing the seat belts

! Make sure that the seat belt is fully rolled

up. Otherwise, the seat belt or belt tongue

will be trapped in the door or in the seat

mechanism. This could damage the door,

the door trim panel and the seat belt. Dam-

aged seat belts can no longer fulfil their

protective function and must be replaced.

Visit a qualified specialist workshop.

R

the ignition is switched on

The seat-belt adjustment will apply a certain

tightening force if any slack is detected

between the vehicle occupant and the seat

belt. Do not hold on to the seat belt tightly

while it is adjusting.

You can switch the seat-belt adjustment on

and off in the on-board computer

(Y page 253).

Belt warning for the driver and front

passenger

The 7 seat belt warning lamp in the instru-

ment cluster reminds you that all vehicle

occupants must fasten their seat belts. It may

Z

Occupant safety

46

light up continuously or flash. A warning tone An airbag supplements a correctly worn seat

may also sound.

The 7 seat belt warning lamp goes out and

the warning tone stops as soon as the driver's

belt. It is not a replacement for the seat belt.

The airbag offers additional protection in

applicable accident situations.

and the co-driver's seat belts have been fas- Not all airbags are deployed in an accident.

tened.

The different airbag systems work independ-

ently of each other (Y page 55).

i For more information on the 7 seat

belt warning lamp, see "Warning and indi-

cator lamps in the instrument cluster, seat

belt" (Y page 292).

However, no system available today can com-

pletely eliminate injuries and fatalities.

It is also not possible to completely rule out a

risk of injury caused by an airbag due to the

speed at which the airbag must be deployed.

Rear seat belt status indicator

Important safety notes

WARNING

G

If you deviate from the correct seat position,

the airbag cannot perform its intended pro-

tective function and can even cause addi-

tional injuries when deployed. There is an

increased risk of serious or even fatal injuries.

The seat belts on the left and centre rear

seats, when viewed in the direction of travel,

are not fastened. (Example)

In order to avoid such risks, always ensure

that all vehicle occupants:

The rear seat belt status indicator is only

available for certain countries.

For approximately 30 seconds, the rear seat

belt status indicator informs you which rear

seat belt is not fastened.

R

fasten their seatbelts correctly, including

pregnant women

are seated correctly and maintain the fur-

thest possible distance from the airbags

R

observe the following notes

The rear seat belt status indicator appears if:

Always ensure that there are no objects loca-

ted between the airbag and the vehicle occu-

pant.

R

you drive off and reach a speed of approx-

imately 10 km/h

R

the rear passengers fasten or unfasten

R

Adjust the seats properly before beginning

your journey. Always make sure that the

seat is in an almost upright position. The

centre of the head restraint must support

the head at about eye level.

their seat belts while the vehicle is in

motion

R

someone gets in or out of the vehicle and

you pull away again

You can also cancel the rear seat belt status

indicator immediately (Y page 257).

R

Move the driver's and front-passenger

seats as far back as possible. The driver's

seat position must allow the vehicle to be

driven safely.

Airbags

R

Only hold the steering wheel on the out-

side. This allows the airbag to be fully

deployed.

Always lean against the backrest while driv-

ing. Do not lean forwards or lean against

Introduction

The installation location of an airbag is iden-

tified by the AIRBAG symbol.

Occupant safety

47

R

the door or side window. You may other-

wise be in the deployment area of the air-

bags.

Always keep your feet in the footwell in

front of the seat. Do not put your feet on the

dashboard, for example. Your feet may oth-

erwise be in the deployment area of the

airbag.

Always secure persons less than 1.50 m tall

in suitable restraint systems. Up to this

height, the seat belt cannot be worn cor-

rectly.

If a child is travelling in your vehicle, also

observe the following notes:

no accessories, such as cup holders, are

attached to the vehicle within the deploy-

ment area of an airbag, e.g. to doors, side

windows, rear side trim or side walls.

no heavy, sharp-edged or fragile objects

are in the pockets of your clothing. Store

such objects in a suitable place.

R

WARNING

G

If you modify an airbag cover or affix objects

such as stickers to it, the airbag can no longer

function correctly. There is an increased risk

of injury.

Never modify an airbag cover or affix objects

to it.

R

Always secure children under twelve years

of age and less than 1.50 m tall in suitable

child restraint systems.

Child restraint systems should be fitted to

the rear seats.

Only secure a child to the front-passenger

seat when the front-passenger front airbag

is disabled, and only then in a rearward-

facing child restraint system. If the

PASSENGER AIR BAG OFF indicator lamp is

permanently lit, the front-passenger front

airbag is disabled (Y page 41).

WARNING

G

Sensors to control the airbags are located in

the doors. Modifications or work not per-

formed correctly to the doors or door panel-

ling, as well as damaged doors, can lead to the

function of the sensors being impaired. The

airbags might therefore not function properly

any more. Consequently, the airbags cannot

protect vehicle occupants as they are

designed to do. This poses an increased risk

of injury.

R

Always observe the instructions and safety

Never modify the doors or parts of the doors.

Always have work on the doors or door pan-

elling carried out at a qualified specialist

workshop.

notes on the automatic front-passenger

front airbag deactivation system

(Y page 49) and on "Children in the vehi-

cle" (Y page 57) in addition to the child

restraint system manufacturer's installa-

tion instructions.

Front airbags

! Do not place heavy objects on the front-

passenger seat. This could cause the sys-

tem to identify the seat as being occupied.

In the event of an accident, the restraint

systems on the front-passenger side may

be triggered and have to be replaced.

Objects in the vehicle interior may pre-

vent the airbag from functioning cor-

rectly. Before starting your journey and to

avoid risks resulting from the speed of the

airbag as it deploys, make sure that:

R

there are no people, animals or objects

between the vehicle occupants and an air-

bag.

R

there are no objects between the seat, door

and B-pillar.

R

no hard objects, e.g. coat hangers, are

hanging on the grab handles or coat hooks.

Z

Occupant safety

48

Driver's kneebag : deploys under the steer-

ing column. The driver's kneebag is triggered

together with the front airbags.

The driver's kneebag offers additional thigh,

knee and lower leg protection for the occu-

pant in the driver's seat.

i The driver's kneebag is only available in

certain countries.

Sidebags

Driver's airbag : deploys in front of the

steering wheel. Front-passenger front air-

bag ; deploys in front of and above the glove

compartment.

When deployed, the front airbags offer addi-

tional head and thorax protection for the

occupants in the front seats.

The PASSENGER AIR BAG OFF and

PASSENGER AIR BAG ON indicator lamps

inform you about the status of the front-

passenger front airbag (Y page 41).

The front-passenger front airbag will only

deploy if:

WARNING

G

Unsuitable seat covers can obstruct or pre-

vent the deployment of the airbags integrated

into the seats. Consequently, the airbags can-

not protect vehicle occupants as they are

designed to do. In addition, the function of the

automatic front-passenger front airbag deac-

tivation 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 corresponding seats by

Mercedes-Benz.

R

the automatic front-passenger front airbag

deactivation system has detected that the

front-passenger seat is occupied

(Y page 49). The PASSENGER AIR BAG

ON indicator lamp is lit (Y page 50)

R

the restraint system control unit predicts a

high accident severity

Driver's kneebag

Front sidebags : and rear sidebags ;

deploy next to the outer bolster of the seat

backrest.

When deployed, the sidebag offers additional

thorax protection. It also offers additional pel-

vis protection for occupants in the front

seats. However, it does not protect the:

R

head

R

neck

R

arms

Occupant safety

49

In the event of a side impact, the sidebag is

deployed on the side on which the impact

occurs.

Vehicles with the automatic front-passenger

airbag deactivation system: the sidebag on

the front-passenger side deploys under the

following conditions:

Automatic front-passenger front air-

bag deactivation

Introduction

In order to recognise a child restraint system

on the front-passenger seat, the automatic

front-passenger front airbag deactivation sys-

tem categorises the person in the front-

passenger seat. Depending on that result, the

front-passenger front airbag is either enabled

or disabled. If a rearward-facing child

R

an occupant is detected on the front-

passenger seat or

R

the belt tongue is engaged in the belt

buckle of the front-passenger seat

restraint system is fitted to the front-

If the belt tongue is engaged in the belt

buckle, the sidebag on the front-passenger

side deploys if an appropriate accident situa-

tion occurs. In this case, deployment is inde-

pendent of whether the front-passenger seat

is occupied or not.

passenger seat, the PASSENGER AIR BAG

OFF indicator lamp must light up after the

system self-test and remain lit. The front-

passenger front airbag is disabled.

The system does not disable:

R

the sidebag

Windowbags

R

the windowbag

R

the seat belt tensioner

Make sure that your vehicle is equipped with

the automatic front-passenger front airbag

deactivation system (Y page 61). If this is

not the case, always install a child restraint

system on a suitable rear seat (Y page 62).

If it is absolutely necessary to install a child

restraint system on the front-passenger seat,

be sure to observe the correct positioning of

the child restraint system. Never place

objects under or behind the child restraint

system, e.g. a cushion. Fully retract the seat

cushion length. The entire base of the child

restraint system must always rest on the seat

cushion of the front-passenger seat. The

backrest of the forward-facing child restraint

system must, as far as possible, be resting on

the backrest of the front-passenger seat. The

child restraint system must not touch the roof

or be put under strain by the head restraint.

Adjust the angle of the seat backrest and the

head restraint position accordingly. Only then

is the correct function of the automatic front-

passenger front airbag deactivation system

guaranteed. Always observe the information

on suitable positioning of the child restraint

system (Y page 62) in addition to the child

Windowbags : are integrated into the side

of the roof frame and deploy in the area from

the A-pillar to the C-pillar.

When deployed, the windowbag enhances the

level of protection for the head. However, it

does not protect the chest or arms.

In the event of a side impact, the windowbag

is deployed on the side on which the impact

occurs.

If the system determines that they can offer

additional protection to that provided by the

seat belt, a windowbag may be deployed in

other accident situations (Y page 55).

Z

Occupant safety

50

restraint system manufacturer's installation

instructions.

tion to the PASSENGER AIR BAG ON and

PASSENGER AIR BAG OFF indicator lamps. Be

aware of the status of the front-passenger

front airbag both before and during the jour-

ney.

Operation of automatic front-passenger

front airbag deactivation

If a person sits in the passenger seat, they

must be:

R

seated with the seat belt fastened correctly

R

in an almost upright position with their

back against the seat backrest

R

with their feet resting on the floor, if possi-

ble

If the front passenger does not observe these

conditions, the automatic front-passenger

front airbag deactivation system may be influ-

enced, e.g. because the front passenger:

:

PASSENGER AIR BAG ON indicator lamp

PASSENGER AIR BAG OFF indicator lamp

R

transfers their weight by supporting them-

;

selves on a vehicle armrest

The indicator lamps inform you whether the

front-passenger front airbag is disabled or

enabled.

R

sits in such a way that their weight is raised

from the seat cushion

The front-passenger front airbag may be dis-

abled by mistake as a result of these or similar

actions. In this case, the PASSENGER AIR

BAG OFF indicator lamp lights up perma-

nently. The front-passenger front airbag does

not then deploy during an accident.

X

Press the Start/Stop button once or twice,

or turn the key to position 1 or 2 in the

ignition lock.

The system carries out a self-diagnosis.

The PASSENGER AIR BAG OFF and

PASSENGER AIR BAG ON indicator lamps

must light up simultaneously for approx-

imately six seconds.

The indicator lamps display the status of the

front-passenger front airbag:

WARNING

G

If the PASSENGER AIRBAG OFF indicator lamp

is lit, the front-passenger front airbag is disa-

bled. It will not be deployed in the event of an

accident and cannot perform its intended pro-

tective function. A person in the front-

passenger seat could then, for example, come

into contact with the vehicle's interior, espe-

cially if the person is sitting too close to the

dashboard. This poses an increased risk of

injury or even fatal injury.

R

PASSENGER AIR BAG ON lights up: the

front-passenger front airbag is enabled. If,

in the event of an accident, all deployment

criteria are met, the front-passenger front

airbag is deployed.

R

PASSENGER AIR BAG OFF lights up: the

front-passenger front airbag is disabled. It

will then not be deployed in the event of an

accident.

If the status of the front-passenger front air-

bag changes while the vehicle is in motion, an

airbag display message appears in the instru-

ment cluster (Y page 270). When the front-

passenger seat is occupied, always pay atten-

When the front-passenger seat is occupied,

always make sure that:

R

the classification of the person in the front-

passenger seat iscorrect and that the front-

passenger front airbag is enabled or disa-

Occupant safety

51

bled in accordance with the person in the

front-passenger seat.

the front-passenger seat has been moved

back as far back as possible.

shoulder belt strap is correctly routed from

the vehicle belt outlet to the shoulder belt

guide on the child restraint system. The shoul-

der belt strap must be routed forwards and

downwards from the vehicle belt outlet. If

necessary, adjust the vehicle belt outlet and

the front-passenger seat accordingly. Always

observe the information about suitable posi-

tioning of the child restraint system in this

Owner's Manual as well as the child restraint

system manufacturer's installation instruc-

tions.

R

the person is seated correctly.

Make sure, both before and during the jour-

ney, that the status of the front-passenger

front airbag is correct.

WARNING

G

If you secure a child on the co-driver's seat in

a rearward-facing child restraint system and

the PASSENGER AIR BAG ON indicator lamp

lights up, the co-driver's airbag could be

deployed in the event of an accident. The child

could be struck by the airbag. There is an

increased risk of injury, possibly even fatal.

In this case, always ensure that the co-driver's

airbag is disabled. The PASSENGER AIRBAG

OFF indicator lamp must light up.

If the automatic front-passenger front airbag

deactivation system detects that:

R

the front-passenger seat is unoccupied, the

PASSENGER AIR BAG OFF indicator lamp

lights up after the system self-test and

remains lit. This indicates that the front-

passenger front airbag is disabled.

R

the front-passenger seat is occupied by a

child in a rearward-facing child restraint

system, the PASSENGER AIR BAG OFF indi-

cator lamp lights up after the system self-

test and remains lit. This indicates that the

front-passenger front airbag is disabled.

But in the case of a child in a rearward-

facing child restraint, the PASSENGER AIR

BAG ON indicator lamp can light up after

the system self-test and remain lit. This

indicates that the front-passenger front air-

bag is enabled. The result of the classifica-

tion is dependent on, among other factors,

the child restraint system and the child's

build. It is recommended that you fit the

child restraint system to a suitable rear

seat.

If the PASSENGER AIR BAG OFF indicator

lamp remains off and/or the PASSENGER AIR

BAG ON indicator lamp lights up, do not install

a rearward-facing child restraint system on

the front-passenger seat. Further information

can be found under "Problems with the auto-

matic front-passenger front airbag deactiva-

tion system" (Y page 54).

WARNING

G

If you secure a child in a forward-facing child

restraint system on the front-passenger seat

and you position the front-passenger seat too

close to the dashboard, in the event of an

accident, the child could:

R

come into contact with the vehicle's inte-

R

the front-passenger seat is occupied by a

rior if the PASSENGER AIR BAG OFF indi-

cator lamp is lit, for example

child in a forward-facing child restraint sys-

tem, either the PASSENGER AIR BAG ON or

PASSENGER AIR BAG OFF indicator lamp

lights up and remains lit after the system

self-test depending on the result of the

classification. The result of the classifica-

tion is dependent on, among other factors,

the child restraint system and the child's

build.

R

be struck by the airbag if the PASSENGER

AIR BAG ON indicator lamp is lit

This poses an increased risk of injury or even

fatal injury.

Always move the front-passenger seat as far

back as possible and fully retract the seat

cushion length. Always make sure that the

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Occupant safety

52

Move the front-passenger seat as far back If the front-passenger seat, the seat cover or

as possible. Always observe the informa-

the seat cushion is damaged, have the nec-

tion in "Child restraint systems on the front- essary repair work carried out at a Mercedes-

passenger seat" (Y page 61) and in "Suit-

able positioning of the child restraint sys-

tem" (Y page 62). Alternatively, you can

fit the child restraint system to a suitable

rear seat.

Benz Service Centre.

For safety reasons, Mercedes-Benz recom-

mends that you only use a child restraint sys-

tem which has been tested and approved by

Mercedes-Benz in combination with the auto-

matic front-passenger front airbag deactiva-

R

the front-passenger seat is occupied by a

person with a smaller build (e.g. a teenager tion system.

or small adult), either the PASSENGER AIR

BAG ON or PASSENGER AIR BAG OFF indi-

cator lamp lights up and remains lit after

the system self-test depending on the

result of the classification.

System self-test

DANGER

G

If both the PASSENGER AIR BAG OFF and

PASSENGER AIR BAG ON indicator lamps do

not light up during the system self-test, the

system is malfunctioning. The front-

passenger front airbag might be triggered

unintentionally or might not be triggered at all

in the event of an accident with high deceler-

ation. This poses an increased risk of injury or

even fatal injury.

-

if the PASSENGER AIR BAG ON indicator

lamp lights up, move the front-passenger

seat as far back as possible. Alterna-

tively, a person with a small build can sit

on a rear seat.

-

if the PASSENGER AIR BAG OFF indicator

lamp is lit, a person with a smaller build

should not use the front-passenger seat.

In this case the front-passenger seat may not

be used. Do not install a child restraint system

on the front-passenger seat. Have the auto-

matic front-passenger front airbag deactiva-

tion system checked and repaired immedi-

ately at a qualified specialist workshop.

R

the front-passenger seat is occupied by an

adult or a person with a build correspond-

ing to that of an adult, the PASSENGER AIR

BAG ON indicator lamp lights up after the

system self-test and remains lit. This indi-

cates that the front-passenger front airbag

is enabled.

WARNING

G

If children are travelling in the vehicle, be sure

to observe the notes on "Children in the vehi-

cle" (Y page 57).

If the PASSENGER AIRBAG OFF indicator lamp

remains lit after the system self-test, the

front-passenger front airbag is disabled. It will

not be deployed in the event of an accident. In

this case, the front-passenger front airbag

cannot perform its intended protective func-

tion, e.g. when a person is seated in the front-

passenger seat.

That person could, for example, come into

contact with the vehicle's interior, especially

if the person is sitting too close to the dash-

board. This poses an increased risk of injury or

even fatal injury.

If the automatic front-passenger front airbag

deactivation system is malfunctioning, the

red 6 restraint system warning lamp in

the instrument cluster and the PASSENGER

AIR BAG OFF indicator lamp light up simulta-

neously. The front-passenger front airbag is

disabled in this case and does not deploy dur-

ing an accident. Have the system checked as

soon as possible by qualified technicians.

Consult a Mercedes-Benz Service Centre. The

front-passenger seat should only be repaired

at a Mercedes-Benz Service Centre.

Occupant safety

53

front airbag deactivation system"

(Y page 54).

When the front-passenger seat is occupied,

always ensure that:

R

the classification of the person in the front-

passenger seat is correct and the front-

passenger front airbag is enabled or disa-

bled in accordance with the person in the

front-passenger seat.

R

the person is seated properly with a cor-

rectly fastened seat belt.

R

the front-passenger seat has been moved

as far back as possible.

If the PASSENGER AIR BAG OFF indicator

lamp remains lit when it should not, the front-

passenger seat may not be used. Do not

install a child restraint system on the front-

passenger seat. Have the automatic front-

passenger front airbag deactivation system

checked and repaired immediately at a quali-

fied specialist workshop.

WARNING

G

Objects between the seat surface and the

child restraint system could affect the func-

tion of the automatic front-passenger front

airbag deactivation system. This could result

in the front-passenger front airbag not func-

tioning 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. The

entire base of the child restraint system must

always rest on the seat cushion of the front-

passenger seat. The backrest of the forwards-

facing child restraint system must, as far as

possible, be resting on the backrest of the

rear reclining seat. Always comply with the

child restraint system manufacturer's instal-

lation instructions.

After the system self-test, the PASSENGER

AIR BAG OFF or PASSENGER AIR BAG ON

indicator lamp then shows the status of the

co-driver's front airbag (Y page 50).

Further information can be obtained under

"Problems with the automatic co-driver's

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Safety -> Occupant safety for Your Mercedes A Class 4 Door Third Generation (2012-2017)

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