Get Occupant safety -> Purpose and function of the restraint system Guide for Mercedes GLA SUV Second Generation (2020-2026)

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.

The driver can cancel automatic braking by taking

the following actions:

braking more strongly than automatic braking

fully depressing the accelerator pedal with

force

Purpose and function of the restraint system

Overview of deployment situations (restraint sys-

tem)

In particular ensure the following conditions to

enable the components of the restraint system to

deploy their protective potential:

Seat correctly (/ page 97).

Fasten seat belts correctly (/ page 98).

Function of the seat belt warning lamp

(/ page 100).

Function of the rear seat belt status dis-

play (/ page 100).

The restraint system warning lamp 6 does

not light up aer the self-check (/ page 99).

The indicator lamps PASSENGER AIR BAG dis-

play the correct status of the front passenger

airbag (/ page 101).

Depending on the detected deployment situation,

the components of the restraint system can be

activated or deployed independently of each

other:

Seat belt tensioner: frontal impact, rear

impact, side impact, rollover

Driver's airbag, front passenger airbag: frontal

impact

Knee airbag: frontal impact

Side airbag: side impact

Window airbag: side impact, rollover, frontal

impact

The installation location of an airbag is identied

by the symbol AIRBAG (/ page 112).

Observe the information on how the restraint sys-

tem works (/ page 106).

Information on how the restraint system works

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 106).

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

aer 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 signicantly without

an airbag being deployed. This is the case if only

106

Occupant safety – Purpose and function of the restraint system

F247 0074 02

parts which are relatively easily deformed are

aected and the rate of vehicle deceleration is

not high. Conversely, an airbag may be deployed

even though the vehicle suers only minor defor-

mation. If very rigid vehicle parts such as longitu-

dinal members are hit, this may result in su-

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

oered 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:

Knee airbag: thigh, knee and lower leg

Driver's airbag, front passenger airbag: head

and ribcage

Window airbag: head

Side airbag: ribcage and pelvis

Vehicles with AMG Performance seat: the side air-

bag provides possible protection for the 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

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 qualied specialist workshop

aer an accident. Take this into account, particu-

larly if a seat belt tensioner is triggered or an air-

bag deployed.

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:

The bang will not generally aect your hearing.

In general, the powder released is not hazard-

ous to health but may cause short-term

breathing diculties to persons suering from

asthma or other pulmonary conditions.

Provided it is safe to do so, leave the vehicle

immediately or open the window in order to

prevent breathing diculties.

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:

They observe the information on the correct

seat position (/ page 97).

There are no heavy, sharp-edged or fragile

objects in the pockets of their clothing. Store

such objects in a suitable place.

WARNING Risk of injury or death due to

incorrect seat position

The seat belt will not oer 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.

Adjust the seat properly before begin-

ning your journey.

Occupant safety – Purpose and function of the restraint system

107

F247 0074 02

Always ensure that the seat backrest is

in an almost vertical position and that

the shoulder section of your seat belt is

routed across the centre of your shoul-

der.

Risk due to objects in the vehicle interior

Every vehicle occupant must make sure of the fol-

lowing in particular:

They observe the information on the correct

seat position (/ page 97).

There are no objects between the seat, door

and door pillar (B-pillar).

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.

WARNING Risk of injury or death due to

blocked seat belt buckle or seat belt

anchorage

Objects next to the front seat that block the

seat belt buckle or the moving seat belt

anchorage on the front seat impair the func-

tion of the seat belt tensioners.

Before starting the journey, make sure

that there are no objects around the seat

belt buckle or between the front seat

and door.

WARNING Risk of injury from objects in

the deployment area of an airbag

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.

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.

The installation location of an airbag is identied

by the AIRBAG (/ page 112) symbol.

Risk due to tting accessories

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.

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.

108

Occupant safety – Purpose and function of the restraint system

F247 0074 02

WARNING Risk of injury or death due to

unsuitable protective covers

Due to unsuitable protective covers, the air-

bags cannot protect vehicle occupants as they

are designed to do.

You should only use protective covers

that have been approved for the corre-

sponding seat by Mercedes-Benz.

In addition, the function of the automatic front

passenger airbag shuto 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 101).

Risk due to pets in the vehicle interior

WARNING Risk of accident and injury due

to animals le unsecured or unattended in

the vehicle

If you leave animals in the vehicle unattended

or unsecured, they could press buttons or

switches, for instance.

An animal may:

activate vehicle equipment and become

trapped, for example

switch systems on or o and endanger

other road users

Unsecured animals may be thrown about the

vehicle in the event of an accident, or sudden

steering and braking manoeuvres, and injure

vehicle occupants.

Never leave animals unattended in the

vehicle.

Always correctly secure animals while

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

rier.

Risk due to modication, damage or wear to the

components of the restraint system

WARNING Risk of injury or death due to

modications to the restraint system

Vehicle occupants may no longer be protected

as intended if alterations are made to the

restraint system.

Never alter the parts of the restraint sys-

tem.

Never tamper with the wiring or any elec-

tronic component parts or their so-

ware.

If it is necessary to modify the vehicle to accom-

modate a person with disabilities, contact a quali-

ed specialist workshop.

Mercedes-Benz recommends that you use driving

aids which have been approved for your vehicle by

Mercedes-Benz.

Occupant safety – Purpose and function of the restraint system

109

F247 0074 02

WARNING Risk of injury or death due to

damaged or modied seat belts

Seat belts cannot provide protection in the fol-

lowing situations:

the seat belt is damaged, has been modi-

ed, is extremely dirty, bleached or dyed

the seat belt buckle is damaged or

extremely dirty

modications have been made to the seat

belt tensioner, seat belt anchorage or seat

belt retractor

Seat belts may sustain non-visible damage in

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

Modied or damaged seat belts could tear or

fail in the event of an accident, for example.

Modied seat belt tensioners could acciden-

tally trigger or fail to function as intended.

Never modify the seat belt system, for

example the seat belt, seat belt buckle,

seat belt tensioner, seat belt anchorage

and seat belt retractor.

Make sure that the seat belts are undam-

aged, not worn and clean.

Always have the seat belts checked

immediately aer an accident at a quali-

ed specialist workshop.

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 t a dierent multipoint seat belt,

for example a four-point seat belt, the restraint

system cannot provide the intended level of pro-

tection.

Depending on the type of vehicle, there may be

openings in the seat backrest. These openings

have no function.

WARNING Risk of injury or fatal injury due

to modied seat belt systems

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.

Only use the standard three-point seat

belt.

Never modify the seat belt system.

WARNING Risk of injury due to modica-

tions to the cover of an airbag

If you modify the cover of an airbag or ax

objects such as stickers to it, the airbag can

no longer function as intended.

Never modify the cover of an airbag.

Do not attach any objects to the cover.

The installation location of an airbag is identied

by the AIRBAG symbol (/ page 112).

WARNING Risk of injury due to malfunc-

tioning sensors in the door

The function of the airbags can be impaired

due to modications or incorrect work per-

formed on the doors or door trim, or if the

doors are damaged.

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Occupant safety – Purpose and function of the restraint system

F247 0074 02

Occupant safety -> Purpose and function of the restraint system for Your Mercedes GLA SUV Second Generation (2020-2026)

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