Get Occupant safety -> Seat belts Guide for Mercedes A Class 4 Door Third Generation (2018-2026)

Occupant safety

The front passenger airbag can only be deployed

in an accident if the PASSENGER AIR BAG OFF

indicator lamp is oꢀ. If the front passenger seat is

occupied, make sure, both before and during the

journey, that the status of the front passenger air-

bag is correct (/ page 47).

If the Emergency Tensioning Devices are triggered

or an airbag is deployed, you will hear a bang, and

a small amount of powder may also be released:

Seat belts

Protection provided by the seat belt

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.

The bang will not generally aꢀect your hearing.

In general, the powder released is not hazard-

ous to health but may cause short-term

breathing diꢃculties to persons suꢀering from

asthma or other pulmonary conditions.

WARNING Risk of burns from hot air bag

components

WARNING Risk of injury or death due to

incorrectly fastened seat belt

Provided it is safe to do so, leave the vehicle

immediately or open the window in order to

prevent breathing diꢃculties.

The air bag parts are hot aꢁer an air bag has

been deployed.

If the seat belt is not worn correctly, it cannot

perform its intended protective function.

Do not touch the air bag parts.

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.

Airbags and pyrotechnic Emergency Tensioning

Devices contain perchlorate material, which may

require special handling or environmental protec-

tion measures. National guidelines regarding

waste disposal must be observed. In California,

see https://dtsc.ca.gov/. Using the search func-

tion, you will ꢂnd information on perchlorate, for

example.

Have a deployed air bag replaced at a

qualiꢂed specialist workshop as soon as

possible.

Always ensure that all vehicle occupants

have their seat belts fastened correctly

and are sitting properly.

Mercedes-Benz recommends that you have the

vehicle towed to a qualiꢂed specialist workshop

aꢁer an accident. Take this into account, particu-

larly if an Emergency Tensioning Device is trig-

gered or an airbag deployed.

Always observe the instructions about the correct

driver's seat position and adjusting the seat

(/ page 87).

Occupant safety

In order for the correctly worn seat belt to provide

the intended level of protection, each vehicle

occupant must observe the following information:

Never secure objects with a seat belt if the

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

cle's occupants.

Limitatioons of the prootection provided by the seat

WARNING Risk of injury or death due to

an incorrect seat position

The seat belt must not be twisted and must ꢂt

tightly and snugly across the body.

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

are ever placed between a person and the

seat.

The seat belt does not oꢀer the intended level

of protection if you have not moved the seat

backrest to an almost vertical position.

The seat belt must be routed across the cen-

ter of the shoulder and as low down across

the hips as possible.

The seat belts on the following seats are equipped

with a child seat safety feature:

In particular, you could slip beneath the seat-

belt and become injured.

The shoulder section of the seat belt should

not touch your neck nor be routed under your

arm or behind your back.

Front passenger seat

Rear seats

Adjust the seat properly before begin-

ning your journey.

Activate or deactivate the child seat safety feature

of the seat belt (/ page 56).

Avoid wearing bulky clothing, e.g. a winter

coat.

Always ensure that the seat backrest is

If children are traveling in the vehicle, be sure to

observe the instructions and safety notes on

"Children in the vehicle" (/ page 52).

in an almost vertical position and that

the shoulder belt is routed across the

center of your shoulder.

Push the lap belt down as far as possible

across your hips and pull tight with the shoul-

der section of the belt. Never route the lap

belt across your abdomen.

Always observe the instructions for loading the

vehicle when securing objects, luggage or loads

(/ page 100).

WARNING Risk of injury or death when

additional restraint systems are not used

for persons with a smaller stature

Pregnant women must also take particular

care with this.

Never route the seat belt across sharp, poin-

ted, abrasive or fragile objects.

Persons under 5 ꢁ (1.50 m ) tall cannot wear

the seat belt correctly without a suitable addi-

tional restraint system.

Only one person should use each seat belt at

any one time.

Occupant safety

Mercedes-Benz recommends that you have the

vehicle towed to a qualiꢂed specialist workshop

aꢁer an accident.

Always secure persons under 5 ꢁ

(1.50 m) tall in a suitable restraint sys-

tem.

Never modify the seat belt system, for

example the seat belt, seat belt buckle,

Emergency Tensioning Device, seat belt

anchorage and seat belt retractor.

NOTE Damage caused by trapping the

seat belt

Make sure that the seat belts are undam-

aged, not worn and clean.

WARNING Risk of injury or death due to

damaged or modiꢂed seat belts

If an unused seat belt is not fully retracted, it

may become trapped in the door or in the seat

mechanism.

Always have the seat belts checked

immediately aꢁer an accident at a quali-

ꢂed specialist workshop.

Seat belts cannot provide protection in the fol-

lowing situations:

The seat belt is damaged, has been modi-

ꢂed, is extremely dirty, bleached or dyed

Always ensure that an unused seat belt

is fully retracted.

Only use seat belts which have been approved for

your vehicle by Mercedes-Benz.

The seat belt buckle is damaged or

extremely dirty

Fasteninng seat belts

WARNING Risk of injury or death from

deployed pyrotechnic Emergency Tension-

ing Devices

Modiꢂcations have been made to the

Emergency Tensioning Device, seat belt

anchorage or seat belt retractor

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.

Pyrotechnic Emergency Tensioning Devices

that have been deployed are no longer opera-

tional and are unable to perform their inten-

ded protective function.

Seat belts may sustain non-visible damage in

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

Modiꢂed or damaged seat belts could tear or

fail in the event of an accident, for example.

Therefore, have deployed pyrotechnic

Modiꢂed Emergency Tensioning Devices could

accidentally trigger or fail to function as inten-

ded.

Emergency Tensioning Devices immedi-

ately replaced at a qualiꢂed specialist

workshop.

Occupant safety

ment may apply a certain tightening force. Do not

hold the seat belt tightly while it is adjusting.

NOTE Deployment of components of the

restraint system when the front passenger

seat is unoccupied and a seat belt is

buckled

You can activate and deactivate the seat belt

adjustment function using the multimedia system

(/ page 42).

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 Emer-

gency Tensioning Device.

Activating/deactivatinng seat belt adjustment via

the multimedia system

Multimedia system:

Settings

Vehicle

Only buckle the seat belts as intended.

Activate or deactivate Belt Adjustment.

Observe the notes on storage areas

(/ page 100).

Releaasingg sseat belts

Information on installing a child restraint sys-

tem and on children traveling in the vehicle

can be found in the "Children in the vehicle"

section (/ page 55).

Press the release button in the seat belt

buckle and guide the seat belt back with the

seat belt tongue.

Always engage seat belt tongue 2 of the seat

belt into seat belt buckle 1 of the corre-

sponding seat.

A seat belt can only provide the best level of

protection if it is worn correctly. Observe the

notes on fastening the seat belt (/ page 39).

Seat belt warnning function for the driver and front

passeenger

Seat belt adjustment function

Vehicles with PRE-SAFE^®: Aꢁer a front seat belt

has been fastened, the automatic seat belt adjust-

The ü seat belt warning lamp in the Instru-

ment Display is a reminder that all vehicle occu-

pants must wear their seat belts correctly.

Occupant safety -> Seat belts for Your Mercedes A Class 4 Door Third Generation (2018-2026)

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