Get Occupant safety Guide for Mercedes C Class 4 Door 2023

Occupant safety – Brief overview of most important points

99

The information is structured as follows:

Deﬁning generic terms clearly

Brief overview of most important points

Basic information

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The most important information in brief: in this In this Owner's Manual, the following generic

chapter, you are provided with an overview of

the relationship between the restraint system

and the correct behaviour of all vehicle occu-

pants.

terms are used:

Make sure that the following prerequisites in par-

ticular have been met so that the components of

the restraint system are able to provide the inten-

ded level of protection:

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Occupant safety: comprises the components

and system functions which help to minimise,

as much as possible, the stresses on and con-

sequences for vehicle occupants during an

accident.

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Speciﬁc information: in further sections of the

chapter "Occupant safety", you can ﬁnd spe-

ciﬁc information on the equipment and func-

tions of the restraint system.

Keyword directory: you can also ﬁnd certain

subjects in this Owner's Manual using the key-

word directory.

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Sit correctly (/ page 100).

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Fasten the seat belt correctly (/ page 101).

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Restraint system: comprises those compo-

nents which, along with the vehicle structure,

help prevent vehicle occupants from poten-

tially coming into contact with parts of the

vehicle interior. The seat belts and airbags, for

example, are components of the restraint sys-

tem.

-

Function of the ü seat belt warning

lamp (/ page 103).

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Function of the rear seat belt status dis-

play (/ page 103).

Information on the following subjects, among oth-

ers, are not provided in the chapter "Occupant

safety":

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The 6 restraint system warning lamp is not

lit up aꢀer the self-test (/ page 102).

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Child restraint system: you can ﬁnd all infor-

mation on this subject in the chapter "Children

in the vehicle" (/ page 117).

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The PASSENGER AIR BAG indicator lamps dis-

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Children in the vehicle (/ page 117)

play the correct status of the front passenger

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airbag (/ page 104).

Driving and driving safety systems

(/ page 334)

Be diligent

For clear understanding

For the components of the restraint system to

provide the intended level of protection, it is

essential that your posture is correct and that the

seat belt is correctly fastened.

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Stowage areas (/ page 196)

The chapter "Occupant safety" includes informa-

tion on equipment, functions and behaviours that

contribute directly to safety of vehicle occupants.

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Occupant safety – Brief overview of most important points

100

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Bear in mind that negligence when adjusting your

sitting position and fastening the seat belt may

have serious consequences. Be diligent and make

sure that all vehicle occupants are sitting cor-

rectly and have fastened their seat belts properly

before starting every journey (/ page 100).

Keep your distance from the airbags, espe-

cially the front airbags. Set the driver's seat

and front passenger seat as far back as possi-

ble while making sure the seat belt is fastened

correctly.

If persons are sitting on the rear seats, vehicle

occupants should maintain an suﬃcient dis-

tance to the parts of the vehicle interior in

front of them.

Make sure there are no people, animals or

objects between the vehicle occupants and an

airbag.

If you are the driver, observe the following

information on the correct position of the driv-

er's seat (/ page 174).

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WARNING Risk of injury or death due to

an incorrect seat position

If you deviate from the correct seat position,

the airbag cannot provide its intended protec-

tive function.

Each vehicle occupant must make sure of the

following.

Information on the correct seat position

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Put the seat in the correct position.

The seat position must be correct in order for the

components of the restraint system to provide the

intended level of protection.

The seat position inﬂuences both the protection

provided by the seat belt and the additional pro-

tection provided by the airbag.

A correct seat position in which the seat is nearly

perfectly upright and a correctly fastened seat

belt reduce the risks posed by the airbag when it

is deployed.

Keep space considerations in mind when choos-

ing a seat. With the seat in the correct, nearly

upright position, your head should not touch the

roof.

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Fasten seat belts correctly. Pregnant

women must take particular care to

ensure that the lap belt never lies across

the abdomen.

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Observe the following information.

In order for the restraint system to provide the

intended level of protection, observe the following

information:

Only hold the steering wheel by the steering

wheel rim. This allows the driver's airbag to

fully deploy.

Assume a nearly upright sitting posture, with

your buttocks positioned as far back as possi-

ble in the gap between the seat cushion and

the seat backrest.

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Before starting your journey, adjust your seat

correctly (/ page 174).

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When doing so, make sure you are able to fas-

ten your seat belt correctly. The shoulder belt

strap must be routed forward from the seat

belt outlet over the centre of your shoulder.

Your back must lie as ﬂatly and as ﬁrmly as

possible against the seat backrest.

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Occupant safety – Brief overview of most important points

101

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While driving, do not lean forward and do not

lean against the door or side window. You may

otherwise be in the deployment area of the

airbags.

Sit with their feet resting on the ﬂoor, if possi-

ble. Your thighs are slightly supported by the

seat cushion

Do not put your feet on the cockpit, for exam-

ple. Your feet may otherwise be in the deploy-

ment area of the airbag.

The shoulder belt strap must be routed

forward from the seat belt outlet over the

centre of your shoulder.

The shoulder belt strap should neither touch

your neck nor be routed under your arm or

behind your back.

The lap belt must be routed as low down

across the hips as possible.

In addition, push the lap belt down as far as

possible across your hips and pull tight with

the shoulder belt strap. Never route the lap

belt across your abdomen.

Pregnant women must also take particular

care with this.

Aꢀer being tightened, the shoulder belt strap

and lap belt must ﬁt snugly against the body.

Avoid wearing bulky clothing, e.g. a winter

coat.

In addition, an incorrectly fastened seat belt

can also cause injuries, for example, in the

event of an accident or when braking or

changing direction suddenly.

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Always ensure that all vehicle occupants

have their seat belts fastened correctly

and are sitting properly.

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WARNING Risk of injury or death when

additional restraint systems are not used

for persons with a smaller stature

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Fasten the seat belt correctly (/ page 101).

Persons under 1.50 m tall cannot wear the

seat belt correctly without a suitable addi-

tional restraint system.

Notes on wearing the seat belt correctly

Always fasten your seat belt correctly before

starting a journey. A seat belt can only provide

the best level of protection if it is worn correctly.

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#

Always secure persons under 1.50 m tall

in a suitable restraint system.

Observe the following information on the correct

seat position and posture (/ page 100).

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WARNING Risk of injury or death due to

incorrectly fastened seat belt

Never route the seat belt across sharp, poin-

ted, abrasive or fragile objects.

Only one person should use each seat belt at

any one time.

Each vehicle occupant must observe the following

notes in particular:

If the seat belt is not worn correctly, it cannot

perform its intended protective function.

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The seat belt must not be twisted.

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Occupant safety – Brief overview of most important points

102

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Never secure objects with a seat belt if the

seat belt is also being used by one of the vehi-

cle's occupants.

Also ensure that no objects, e.g. a cushion,

are ever placed between a person and the

seat.

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NOTE Deployment of components of the

restraint system when the front passenger

seat is unoccupied and a seat belt is

buckled

When the front passenger seat is unoccupied

and the seat belt tongue of the seat belt is

engaged in the seat belt buckle, components

of the restraint system may deploy unnecessa-

rily on the front passenger side, e.g. the seat

belt tensioner.

If you are driving with a child in the vehicle,

observe the information in the chapter "Children

in the vehicle" (/ page 117)

Observe the instructions for loading the vehicle

when securing objects, luggage or loads

(/ page 196).

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Only buckle the seat belts as intended.

Function of the restraint system warning lamp

Fastening and adjusting seat belts

When the vehicle is switched on, a self-test is per-

formed, during which the 6 restraint system

warning lamp lights up. It goes out no later than a

few seconds aꢀer the vehicle is started. The com-

ponents of the restraint system are then func-

tional.

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Always engage seat belt tongue 1 of the seat

belt into seat belt buckle 2 of the corre-

sponding seat.

To adjust the seat belt height: press button 3

on the seat belt outlet and slide the seat belt

outlet to the desired position.

To engage the seat belt outlet: release button

3 and ensure that the seat belt outlet

engages.

If the seat belt is pulled quickly or sharply, the

seat belt retractor locks. The seat belt strap can-

not be pulled out any further.

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Occupant safety – Brief overview of most important points

In addition, a warning tone may sound.

103

A malfunction has occurred in the restraint sys-

tem if:

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DANGER Risk of fatal injury due to mal-

As soon as the driver and front passenger fasten

their seat belts, the seat belt warning goes out.

functioning automatic high-voltage emer-

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the 6 restraint system warning lamp does

gency shutoﬀ

not light up when the vehicle is switched on

In the event of an accident, the high-voltage

on-board electrical system may not be deacti-

vated as intended.

You may receive an electric shock if you touch

the damaged components of the high-voltage

on-board electrical system.

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the 6 restraint system warning lamp lights

Function of the rear seat belt status display

up continuously or repeatedly during a journey

The rear seat belt status display in the driver's dis-

play is a reminder that all vehicle occupants must

wear their seat belts correctly.

If components of the restraint system have been

deployed, the 6 restraint system warning lamp

lights up continuously.

In addition, a warning tone may sound.

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Have the automatic high-voltage emer-

If a person unfastens a seat belt in the rear

passenger compartment while the vehicle is

motion, the rear seat belt status display appears

again.

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WARNING Risk of injury due to malfunc-

tions in the restraint system

gency shutoﬀ checked and repaired

immediately at a qualiﬁed specialist

workshop.

Components in the restraint system may be

activated unintentionally or not deploy as

intended in an accident.

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Aꢀer an accident, switch oﬀ the vehicle

Display in the driver's display

immediately.

Every time the vehicle is switched on, the rear

seat belt status display informs you for a certain

amount of time which rear seat belt is not fas-

tened.

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Have the restraint system checked and

Mercedes-Benz recommends that you have the

vehicle towed to a qualiﬁed specialist workshop.

repaired immediately at a qualiﬁed spe-

cialist workshop.

Plug-in hybrid vehicles: if the restraint system is

malfunctioning, the automatic high voltage emer-

gency shutoﬀ may not function.

Function of the seat belt warning lamp

The ü seat belt warning lamp in the driver's

display is a reminder that all vehicle occupants

must wear their seat belts correctly.

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Occupant safety – Brief overview of most important points

104

Function of the PASSENGER AIR BAG indicator

lamps (front passenger airbag)

If the front passenger seat is occupied or a child

restraint system is ﬁtted on the front passenger

seat, you must make sure both before, and also

during the journey, that the status of the front

passenger airbag is correct for the situation.

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WARNING Risk of potentially fatal injuries

due to objects trapped under the front

passenger seat

Objects trapped under the front passenger

seat may interfere with the function of the

automatic front passenger airbag shutoﬀ or

damage the system.

You can determine the status of the rear seat belt

by the colour of the seat symbol in the driver's

display as follows:

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Grey: the rear seat belt is not fastened.

Green: the seat belt tongue of a rear seat belt

is engaged in the seat belt buckle of the dis-

played seat.

Red: the person in the rear seat has unfas-

tened their seatbelt.

Do not stow any objects under the front

passenger seat.

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#

When the front passenger seat is occu-

pied, ensure that no objects have

become trapped beneath the front

passenger seat.

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Vehicles without automatic front passenger airbag

shutoﬀ have a special sticker aﬃxed to the side of

the cockpit on the front passenger side

(/ page 124).

Self-test: when the vehicle is switched on, both

the PASSENGER AIR BAG ON and OFF indicator

lamps light up simultaneously for several seconds.

The PASSENGER AIR BAG indicator lamps display

the status of the front passenger airbag.

F206 0105 02

Occupant safety – Brief overview of most important points

105

%

Aꢀer the self-test, you can determine the status of

If you are driving with a child in the vehicle,

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Both before and during the journey,

ensure that the status of the front

passenger airbag is correct.

the front passenger airbag as follows:

observe the information in the chapter "Chil-

dren in the vehicle" (/ page 117)

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Front passenger airbag disabled: PASSENGER

AIR BAG OFF lights up continuously.

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WARNING Risk of injury or death due to a

disabled front passenger airbag

Malfunction of the automatic front passenger air-

bag shutoﬀ

The PASSENGER AIR BAG OFF indicator lamp and

the 6 restraint system indicator lamp light up

simultaneously.

In this case, no one may use the front passenger

seat and no child restraint system may be ﬁtted

on the front passenger seat.

Have the automatic front passenger airbag shutoﬀ

checked and repaired immediately at a qualiﬁed

specialist workshop.

The front passenger airbag will not be

deployed in the event of an accident. If

PASSENGER AIR BAG OFF is lit, no one may

use the front passenger seat.

If a rearward-facing child restraint system is

ﬁtted on the front passenger seat,

PASSENGER AIR BAG OFF must be lit continu-

ously.

The front passenger airbag is disabled when

the PASSENGER AIR BAG OFF indicator lamp

is lit.

A person in the front passenger seat could

then, for example, come into contact with the

vehicle interior, especially if the person is sit-

ting too close to the cockpit.

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Front passenger airbag enabled: PASSENGER

If the front passenger seat is occupied, always

ensure that:

AIR BAG ON lights up for up to 60 seconds or

until both the PASSENGER AIR BAG ON and

OFF indicator lamps go out.

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the classiﬁcation of the person in the front

passenger seat is correct and the front

passenger airbag is enabled or disabled in

accordance with the person in the front

passenger seat.

the front passenger seat has been moved

as far back as possible.

Disabling or enabling the front passenger airbag

The front passenger airbag may be deployed

during an accident. If the front passenger air-

bag is in this status, no rearward-facing child

restraint system may be ﬁtted on the front

passenger seat.

The automatic front passenger airbag shutoﬀ can

disable or enable the front passenger airbag

according to the situation.

This happens automatically as a result of the clas-

siﬁcation of the person or child restraint system

on the front passenger seat.

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the person is seated correctly.

F206 0105 02

Occupant safety – Information on the automatic functions of the restraint system

106

You cannot manually disable or enable the front

passenger airbag.

Information on the automatic functions of the

restraint system

Function of the automatic front passenger airbag

shutoﬀ

Information on the child restraint system

When ﬁtting a child restraint system, observe the

notes in "Children in the vehicle" (/ page 117).

A person on the front passenger seat must

observe the following information:

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Sit correctly (/ page 100).

Notes on the child restraint system on the front

passenger seat

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Fasten the seat belt correctly (/ page 101).

The automatic front passenger airbag shutoﬀ can

disable or enable the front passenger airbag

according to the situation.

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WARNING Risk of injury or death due to

an enabled co-driver airbag

If the co-driver airbag is enabled, a child on

the co-driver seat may be struck by the co-

driver airbag during an accident.

Make sure you observe the following information:

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The status of the front passenger airbag, see

"Function of the PASSENGER AIR BAG indica-

Status of the front passenger airbag in relation to

the stature of the person:

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NEVER use a rearward-facing child

tor lamps"(/ page 104).

restraint system on a seat with an ENA-

BLED FRONT AIRBAG. DEATH or SERI-

OUS INJURY to the CHILD can occur.

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When ﬁtting a child restraint system to the

Front passenger airbag disabled: PASSENGER

AIR BAG OFF lights up continuously.

front passenger seat, observe the vehicle-spe-

ciﬁc information (/ page 121).

The front passenger airbag will not be

deployed in the event of an accident. If

PASSENGER AIR BAG OFF is lit, no one may

use the front passenger seat.

Also pay particular attention to the notes on rear-

ward-facing or forward-facing child restraint sys-

tems on the front passenger seat (/ page 121).

F206 0105 02

Occupant safety – Information on the automatic functions of the restraint system

Function of PRE-SAFE^®(anticipatory occupant

107

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Front passenger airbag enabled: PASSENGER

AIR BAG ON lights up for up to 60 seconds or

until both the PASSENGER AIR BAG ON and

OFF indicator lamps go out.

The front passenger airbag may be deployed

during an accident. Observe the following

information on the correct seat position

(/ page 100).

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NOTE Deployment of components of the

protection)

restraint system when the front passenger

seat is unoccupied

PRE-SAFE^®is able to detect certain critical driv-

ing situations and implement pre-emptive meas-

ures to protect the vehicle occupants.

PRE-SAFE^®can implement the following meas-

ures independently of each other:

In an accident, the components of the

restraint system may deploy unnecessarily on

the front passenger side if:

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There are heavy objects on the front

passenger seat.

The seat belt tongue is engaged in the seat

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Tightening the seat belts on the driver's seat

and front passenger seat.

Vehicles with rear seats: a person of smaller

stature should use a rear seat.

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belt buckle of the front passenger seat and

the front passenger seat is unoccupied.

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Closing the side windows.

Vehicles with sliding sunroof: closing the slid-

ing sunroof.

System limits

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The front passenger airbag may otherwise be dis-

abled by mistake, for example, in the following sit-

uation:

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Stow objects in a suitable place.

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Vehicles with memory function: moving the

front passenger seat to a more favourable seat

position.

Only one person should use each seat

belt at any one time.

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The front passenger transfers their weight by

supporting themselves on a vehicle armrest.

The front passenger sits in such a way that

their weight is raised from the seat surface.

Depending on the detected accident situation, the

window airbag on the front passenger side may

deploy. The airbag is deployed regardless of

whether the front passenger seat is occupied.

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Vehicles with multicontour seat: increasing the

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lateral support by inﬂating the seat side bol-

sters of the seat backrest.

PRE-SAFE^®Sound: provided that the multime-

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dia system is switched on, generating a brief

noise signal to stimulate the innate protective

mechanism of a person's hearing.

F206 0105 02

Occupant safety – Information on the automatic functions of the restraint system

108

pants. These measures cannot necessarily pre-

The system will not initiate any braking application

in the following situations:

*

NOTE Damage caused by objects in the

footwell or behind the seat

vent an imminent impact.

PRE-SAFE^®PLUS can implement the following

measures independently of each other:

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whilst driving

The automatic adjustment of the seat position

may result in damage to the seat and/or the

object.

or

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Tightening the seat belts on the driver's seat

and front passenger seat.

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when entering or exiting a parking space while

using Active Parking Assist

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Stow objects in a suitable place.

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Activating the rear hazard warning lights at a

higher ﬂashing frequency.

You can watch an animation on this topic via the

following link:

Reversing the PRE-SAFE^®system measures

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Increasing brake pressure when the vehicle is

stationary. This brake application is cancelled

automatically when the vehicle pulls away.

If an accident did not occur, the pre-emptive

measures that were taken are reversed.

Function of PRE-SAFE^®Impulse Side

If an imminent side impact is detected, PRE-

SAFE^®Impulse Side can pre-emptively move the

front seat vehicle occupant's upper body towards

the centre of the vehicle. It does this by rapidly

inﬂating an air cushion in the outer seat side bol-

ster of the seat backrest on the side on which the

impact is anticipated. This increases the distance

between the door and the vehicle occupant.

If PRE-SAFE^®Impulse Side has been deployed or

is faulty, the PRE-SAFE impulse side inoperative

See Owner's Manual display message appears.

If an accident did not occur, the pre-emptive

measures that were taken are reversed.

You will need to perform certain settings yourself.

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If the seat belt pre-tensioning is not reduced,

move the seat backrest back slightly.

The locking mechanism releases.

System limits

The system will not initiate any action in the fol-

lowing situations:

Function of PRE-SAFE^®PLUS (anticipatory occu-

pant protection plus)

PRE-SAFE^®PLUS can detect certain impacts, par-

ticularly an imminent rear impact, and take pre-

emptive measures to protect the vehicle occu-

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when reversing

or

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when the vehicle is towing a trailer and there

is a risk of a rear impact

F206 0105 02

Occupant safety – Information on the automatic functions of the restraint system

109

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Seat belt adjustment function

Overview of the automatic measures aꢀer an acci-

displaying the emergency guide in the central

dent

display (/ page 66)

Vehicles with PRE-SAFE^®: aꢀer you have fastened

the seat belt of the front seat, it may adjust itself

against your body by pulling at the shoulder until

somewhat tight. Do not hold the seat belt tightly

while it is adjusting.

This function is a reminder that all vehicle occu-

pants must wear their seat belts correctly.

You can activate and deactivate the seat belt

adjustment function using the multimedia system

(/ page 109).

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switching on the interior lighting

Depending on the type and severity of the acci-

dent, and depending on the vehicle's equipment,

the following measures can be implemented, for

example:

Function of the post-collision brake aꢀer an acci-

dent

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automatic braking (post-collision brake)

(/ page 109)

Depending on the accident situation, the post-col-

lision brake can minimise the severity of a further

collision or even avoid it.

If an accident is detected, the post-collision brake

can initiate automatic braking. When the vehicle

has come to a standstill, the electric parking

brake is automatically applied.

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activating the hazard warning lights

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triggering an automatic emergency call

(/ page 66)

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switching oﬀ the engine

Activating/deactivating seat belt adjustment via

the multimedia system

To start the vehicle again, switch the vehicle

oﬀ and on once more (/ page 261). Depend-

ing on the type and severity of the accident,

you may no longer be able to start the vehicle.

The driver can cancel automatic braking by taking

the following actions:

Multimedia system:

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braking more strongly than automatic braking

fully depressing the accelerator pedal with

force

4

5

©

Settings

Vehicle

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switching oﬀ the fuel supply

5

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Occupant protection

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Plug-in hybrid: switching oﬀ the hybrid system

and high-voltage on-board electrical system

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Activate or deactivate Belt adjustment.

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unlocking the vehicle doors

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lowering the side windows

F206 0105 02

Occupant safety – Purpose and function of the restraint system

110

Depending on the detected deployment situation,

Information on how the restraint system works

Purpose and function of the restraint system

Overview of deployment situations (restraint sys-

tem)

the components of the restraint system can be

activated or deployed independently of each

other:

How the restraint system functions depends on

the severity of the impact detected and the appa-

rent type of accident.

For more information about types of accidents,

see "Overview of deployment situations"

(/ page 110).

Make sure that the following prerequisites in par-

ticular have been met so that the components of

the restraint system are able to provide the inten-

ded level of protection:

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Seat belt tensioner: frontal impact, rear

impact, side impact, rollover

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Driver's airbag, front passenger airbag: frontal

impact

The activation thresholds for the components of

the restraint system are determined based on the

evaluation of the sensor values measured at vari-

ous points in the vehicle. This process is pre-emp-

tive in nature. The triggering/deployment of the

components of the restraint system must take

place in good time at the start of the collision.

Factors which can only be seen and measured

aꢀer a collision has occurred cannot play a deci-

sive role in airbag deployment. Nor do they pro-

vide an indication of airbag deployment.

The vehicle may be deformed signiﬁcantly without

an airbag being deployed. This is the case if only

parts which are relatively easily deformed are

aﬀected and the rate of vehicle deceleration is

not high. Conversely, an airbag may be deployed

even though the vehicle suﬀers only minor defor-

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Sit correctly (/ page 100).

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Knee airbag: frontal impact

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Fasten the seat belt correctly (/ page 101).

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Side airbag: side impact

-

Function of the seat belt warning lamp

(/ page 103).

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Centre airbag in the driver's seat backrest:

side impact

-

Function of the rear seat belt status dis-

play (/ page 103).

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Window airbag: side impact, rollover, frontal

impact

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The 6 restraint system warning lamp is not

PRE-SAFE^®Impulse Side: side impact

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lit up aꢀer the self-test (/ page 102).

The installation location of an airbag is identiﬁed

by the AIRBAG symbol (/ page 116).

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The PASSENGER AIR BAG indicator lamps dis-

play the correct status of the front passenger

airbag (/ page 104).

Observe the information on the function of the

restraint system (/ page 110).

F206 0105 02

Occupant safety – Purpose and function of the restraint system

111

mation. If very rigid vehicle parts such as longitu-

dinal members are hit, this may result in suﬃ-

ciently high levels of vehicle deceleration.

Depending on the apparent type of accident and

the detected deployment situation, seat belt ten-

sioners and/or airbags supplement the protection larly if a seat belt tensioner is triggered or an air-

oﬀered by a correctly worn seat belt.

When enabled, an airbag can provide additional

protection for the respective vehicle occupant.

Potential protection provided by each airbag:

not possible to completely rule out the risk of

injury caused by the airbag deploying.

Mercedes-Benz recommends that you have the

vehicle towed to a qualiﬁed specialist workshop

aꢀer an accident. Take this into account, particu-

Information on the limited protection provided by

the restraint system

Risk due to the incorrect behaviour of vehicle

occupants

Every vehicle occupant must make sure of the fol-

lowing in particular:

bag deployed.

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They observe the information on the correct

seat position (/ page 100).

If the seat belt tensioners are triggered or an air-

bag is deployed, you will hear a bang, and a small

amount of powder may also be released:

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There are no heavy, sharp-edged or fragile

objects in the pockets of their clothing. Store

such objects in a suitable place.

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The bang will not generally aﬀect your hearing.

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Knee airbag: thigh, knee and lower leg

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In general, the powder released is not hazard-

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Driver's airbag, front passenger airbag: head

and ribcage

ous to health but may cause short-term

breathing diﬃculties to persons suﬀering from

asthma or other pulmonary conditions.

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WARNING Risk of injury or death due to

incorrect seat position

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Window airbag: head

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The seat belt will not oﬀer the intended level

of protection if you have not moved the seat

backrest to an almost vertical position.

In particular, you may slip under the seatbelt

and injure yourself.

Side airbag: ribcage, also pelvis for front seat

occupants

Provided it is safe to do so, leave the vehicle

immediately or open the window in order to

prevent breathing diﬃculties.

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Centre airbag: head and ribcage

However, no system available today can com-

pletely eliminate injuries and fatalities in every

accident situation. In particular, the seat belt and

airbag generally do not protect against objects

penetrating the vehicle from the outside. It is also

#

Adjust the seat properly before begin-

ning your journey.

#

Always ensure that the seat backrest is

in an almost vertical position and that

F206 0105 02

Occupant safety – Purpose and function of the restraint system

112

The installation location of an airbag is identiﬁed

by the AIRBAG (/ page 116) symbol.

the shoulder section of your seat belt is

routed across the centre of your shoul-

der.

anchorage on the front seat impair the func-

tion of the seat belt tensioners.

Observe the following information:

#

Before starting the journey, make sure

R

that there are no objects around the seat

belt buckle or between the front seat

and door.

Notes on loading the vehicle (/ page 196)

Risk due to objects in the vehicle interior

Every vehicle occupant must make sure of the fol-

lowing in particular:

R

Information on the centre airbag in the driver's

seat backrest (/ page 116)

Risk due to ﬁtting accessories

R

They observe the information on the correct

seat position (/ page 100).

&

WARNING Risk of injury from objects in

the deployment area of an airbag

Do not attach accessories such as mobile naviga-

tion devices, mobile phones or cup holders, within

the deployment area of an airbag, e.g. on the

cockpit, on the door, on the side window or on the

side trim.

R

There are no objects between the seat, door

and door pillar (B-pillar).

Objects in the deployment area of an airbag

can hinder or prevent the correct deployment

of the airbag.

The airbag may then deploy in an uncontrolled

manner and may even cause additional inju-

ries to the vehicle occupants by deploying.

This may be the case in particular if the airbag

is integrated into the seat.

R

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

hanging on the grab handles or coat hooks.

There are no heavy, sharp-edged or fragile

objects in the pockets of their clothing. Store

such objects in a suitable place.

In addition, no connecting cables, tensioning

straps or retaining straps must be routed or

attached to the vehicle within the deployment

area of an airbag. Always comply with the acces-

sory manufacturer's installation instructions and,

in particular, the notes on suitable places for

installation.

&

WARNING Risk of injury or death due to

blocked seat belt buckle or seat belt

anchorage

#

Always stow and secure objects cor-

rectly.

#

Before commencing your journey, make

sure that no objects are stowed in the

deployment area of an airbag.

Objects next to the front seat that block the

seat belt buckle or the moving seat belt

F206 0105 02

Occupant safety – Purpose and function of the restraint system

113

Risk due to pets in the vehicle interior

Risk due to modiﬁcation, damage or wear to the

&

WARNING Risk of injury or death due to

unsuitable protective covers

components of the restraint system

&

WARNING Risk of accident and injury due

to animals leꢀ unsecured or unattended in

the vehicle

Due to unsuitable protective covers, the air-

bags cannot protect vehicle occupants as they

are designed to do.

&

WARNING Risk of injury or death due to

modiﬁcations to the restraint system

If you leave animals in the vehicle unattended

or unsecured, they could press buttons or

switches, for instance.

Vehicle occupants may no longer be protected

as intended if alterations are made to the

restraint system.

#

You should only use protective covers

that have been approved for the corre-

sponding seat by Mercedes-Benz.

#

An animal may:

Never alter the parts of the restraint sys-

tem.

R

activate vehicle equipment and become

trapped, for example

In addition, the function of the automatic front

passenger airbag shutoﬀ could be restricted due

to an unsuitable protective cover. If the front

passenger seat is occupied, ensure that the

PASSENGER AIR BAG indicator lamps display the

correct status of the front passenger airbag

(/ page 104).

#

Never tamper with the wiring or any elec-

tronic component parts or their soꢀ-

R

switch systems on or oﬀ and endanger

other road users

ware.

Unsecured animals may be thrown about the

vehicle in the event of an accident, or sudden

steering and braking manoeuvres, and injure

vehicle occupants.

If it is necessary to modify the vehicle to accom-

modate a person with disabilities, contact a quali-

ﬁed specialist workshop.

Mercedes-Benz recommends that you use driving

aids which have been approved for your vehicle by

Mercedes-Benz.

#

Never leave animals unattended in the

vehicle.

#

Always correctly secure animals while

driving, e.g. using a suitable animal car-

rier.

F206 0105 02

Occupant safety – Purpose and function of the restraint system

114

#

&

Make sure that the seat belts are undam-

Only use the standard three-point seat

belt.

Never modify the seat belt system.

WARNING Risk of injury or death due to

aged, not worn and clean.

damaged or modiﬁed seat belts

#

Always have the seat belts checked

immediately aꢀer an accident at a quali-

ﬁed specialist workshop.

Seat belts cannot provide protection in the fol-

lowing situations:

&

WARNING Risk of injury due to modiﬁca-

tions to the cover of an airbag

R

the seat belt is damaged, has been modi-

ﬁed, is extremely dirty, bleached or dyed

the seat belt buckle is damaged or

extremely dirty

modiﬁcations have been made to the seat

belt tensioner, seat belt anchorage or seat

belt retractor

Mercedes-Benz recommends that you use seat

belts which have been approved for your vehicle

by Mercedes-Benz.

The seat is designed for the standard three-point

seat belt. If you ﬁt a diﬀerent multipoint seat belt,

for example a four-point seat belt, the restraint

system cannot provide the intended level of pro-

tection.

R

If you modify the cover of an airbag or aﬃx

objects such as stickers to it, the airbag can

no longer function as intended.

R

#

Never modify the cover of an airbag.

Do not attach any objects to the cover.

#

Seat belts may sustain non-visible damage in

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

Modiﬁed or damaged seat belts could tear or

fail in the event of an accident, for example.

Modiﬁed seat belt tensioners could acciden-

tally trigger or fail to function as intended.

The installation location of an airbag is identiﬁed

by the AIRBAG symbol (/ page 116).

Depending on the type of vehicle, there may be

openings in the seat backrest. These openings

have no function.

&

WARNING Risk of injury due to malfunc-

tioning sensors in the door

&

WARNING Risk of injury or fatal injury due

to modiﬁed seat belt systems

The function of the airbags can be impaired

due to modiﬁcations or incorrect work per-

formed on the doors or door trim, or if the

doors are damaged.

#

Never modify the seat belt system, for

example the seat belt, seat belt buckle,

seat belt tensioner, seat belt anchorage

and seat belt retractor.

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

accident.

F206 0105 02

Occupant safety

115

#

Never modify the doors or parts of the

doors.

Always have work on the doors or door

trim carried out at a qualiﬁed specialist

workshop.

&

Seat belts

Releasing seat belts

WARNING Risk of injury due to deployed

airbag

A deployed airbag no longer oﬀers any protec-

tion.

#

Press the release button in the seat belt

buckle and guide the seat belt back with the

seat belt tongue.

#

Have the vehicle towed to a qualiﬁed

specialist workshop in order to have the

deployed airbag replaced.

Risk due to components of the restraint system

which have already been deployed

Mercedes-Benz recommends that you have the

vehicle towed to a qualiﬁed specialist workshop

aꢀer an accident.

*

NOTE Damage caused by trapping the

seat belt

Have deployed airbags replaced immediately.

If an unused seat belt is not fully retracted, it

may become trapped in the door or in the seat

mechanism.

&

WARNING Risk of injury or death from

deployed pyrotechnic seat belt tensioners

&

WARNING Risk of burns from hot airbag

components

#

Always ensure that an unused seat belt

is fully retracted.

Pyrotechnic seat belt tensioners that have

been deployed are no longer operational and

are unable to perform their intended protec-

tive function.

The airbag parts are hot aꢀer an airbag has

been deployed.

#

Do not touch the airbag parts.

#

Therefore, have deployed pyrotechnic

#

Have a deployed airbag replaced at a

seat belt tensioners immediately

replaced at a qualiﬁed specialist work-

shop.

qualiﬁed specialist workshop as soon as

possible.

F206 0105 02

Occupant safety

116

bol M indicates the installation location for cer-

tain airbags.

Observe the information in "Overview of deploy-

ment situations" (/ page 110).

Airbags

Overview of airbags

Information on the centre airbag in the driver's

seat backrest

When triggered, the centre airbag deploys

between the front seats. Do not stow any objects

in the deployment area of the centre airbag.

Observe the notes on loading the vehicle

(/ page 196).

1

2

3

4

5

6

Knee airbag

Driver's airbag

Front passenger airbag

Window airbag

Side airbag

Centre airbag¹

¹⁾Only for certain countries.

The installation location of an airbag is identiﬁed

by the AIRBAG symbol. An additional arrow sym-

F206 0105 02

Occupant safety for Your Mercedes C Class 4 Door 2023

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