lock MERCEDES-BENZ E-CLASS ESTATE 2008 Service Manual

Occupant safety
41deceleration force would normally be high
enough to trigger the systems, or they
could be triggered unintentionally. Never
carry out any modifications on the restraint
systems.
Never tamper with electronic components
and their software.
SRS (Supplemental Restraint System)
The SRS reduces the risk of occupants com-
ing into contact with the vehicle's interior in
the event of an accident. It can also reduce
the forces to which occupants are subjected
during an accident.
The SRS consists of:
R the 1 warning lamp
R belt tensioners
R belt force limiters
R airbags
The 1 1 warning lamp The SRS functions are checked regularly
when you turn on the ignition and when the
engine is running. Malfunctions can therefore
be detected in good time. The
1 warning lamp in the instrument
cluster lights up when the ignition is switched
on. It goes out no later than a few seconds
after the engine is started. G
Risk of injury
If SRS is malfunctioning, individual systems
may be activated unintentionally or not be
triggered in the event of an accident with
heavy braking.
A malfunction has occurred if the 1
warning lamp:
R does not light up when you switch on the
ignition
R does not go out after the engine has been
running for a few seconds
R lights up again once the engine is running
In this case, have SRS checked immedi-
ately at a qualified specialist workshop.
Triggering of belt tensioners, belt force
limiters and airbags In the event of a collision, the sensor in the
airbag control unit evaluates important phys-
ical data such as duration, direction and force
of the vehicle deceleration or acceleration.
Based on the evaluation of this data, and depending on the vehicle's rate of longitudi-
nal deceleration in a collision, the airbag con-
trol unit pre-emptively triggers the belt
tensioners in the first stage.
i
The front belt tensioners can only be trig-
gered if the belt tongue is correctly
engaged in the seat belt buckle.
The front airbags are only deployed if there is
an even higher rate of vehicle deceleration in
a longitudinal direction.
Your vehicle has adaptive, dual stage front
airbags. When the first activation threshold
has been reached, the front airbag is filled
with enough propellant gas to minimise the
risk of injury. The front airbag is only fully
inflated if a second threshold is reached
within a few milliseconds, due to the control
unit having detected further deceleration.
Criteria for triggering belt tensioners and
airbags
In the first stage of a collision, the airbag con-
trol unit evaluates the duration and direction
of vehicle acceleration or deceleration in
order to determine whether it is necessary to
trigger the belt tensioner and/or airbag.
The belt tensioner and airbag triggering
thresholds are variable and are adapted to the
rate of deceleration of the vehicle. This proc- Safety
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Occupant safety
42
ess is pre-emptive in nature as the airbag
must be deployed during – and not at the end
of – the collision.
i Airbags are not deployed in all types of
accidents. They are controlled by complex
sensor technology and evaluation logic.
This process is pre-emptive in nature as
airbag deployment must take place during
the impact and must be adapted to provide
calculated, additional protection for the
vehicle occupants. Not all airbags are
deployed in an accident.
The different airbag systems work inde-
pendently of each other. However, the
deployment of each individual system will
depend on the type of accident determined
by the control system in the first stages of
the collision (head-on collision, side impact
and overturn) and the extent of the acci-
dent (in particular, the vehicle's rate of
deceleration or acceleration).
The rate of vehicle deceleration or accelera-
tion and the direction of the force are basi-
cally determined by:
R the distribution of forces during the colli-
sion
R the collision angle R
the deformation characteristics of the vehi-
cle
R the characteristics of the object with which
the vehicle has collided, e.g. the other vehi-
cle
Factors which can only be seen and measured
after a collision has occurred do not play a
decisive role in the deployment of an airbag,
nor do they provide an indication of it.
The vehicle may be deformed significantly,
e. g. on the bonnet or the wing, without an
airbag being deployed. This is the case if only
parts which are relatively easily deformed are
affected and the necessary deceleration does
not occur. Conversely, airbags may be
deployed even though the vehicle suffers only
minor deformations. This is the case if, for
example, very rigid vehicle parts such as lon-
gitudinal body members are affected and suf-
ficient deceleration occurs as a result.
Belt tensioners, belt force limiters The front seat belts and the outer seat belts
in the rear are equipped with belt tensioners.
!
Do not engage the seat belt tongue in the
buckle on the front-passenger seat if the
seat is not occupied. Otherwise the belt tensioner could be activated in an emer-
gency.
If the seat belt is also equipped with a belt
force limiter, the force exerted by the seat
belt on the seat occupant is reduced.
Belt tensioners tighten the seat belts in an
accident, pulling them close against the body.
i Belt tensioners do not correct incorrect
seat positions or incorrectly fastened seat
belts.
Belt tensioners do not pull occupants back
towards the backrest.
The front belt force limiters are synchronised
with the front airbags, which distribute the
forces exerted by the belt force limiters on
the occupant over a greater area.
When the ignition is switched on, the belt ten-
sioner is triggered:
R only if the restraint systems are operational
(the 1 warning lamp lights up after the
ignition is switched on and goes out once
the engine is running) (Y page 41)
R for each three-point seat belt in the front of
the vehicle when the belt tongue is
engaged in the buckle
R in the event of a head-on or rear-end colli-
sion if the vehicle decelerates or acceler- Safety
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Occupant safety
43
ates rapidly in a longitudinal direction
during the initial stages of the impact
R in certain situations if the vehicle over-
turns, and the system determines that it
can provide additional protection
When the belt tensioners are triggered you
will hear a bang, which will not cause any
harm to your hearing, and a small amount of
powder may also be released. The 1warn-
ing lamp lights up. G
Risk of injury
If the seat belt tensioners have been trig-
gered, they provide no additional protec-
tion in the event of another accident.
Therefore, have belt tensioners which have
been triggered replaced at a qualified spe-
cialist workshop.
Comply with safety regulations when dis-
posing of belt tensioners. Any Mercedes-
Benz Service Centre can provide details of
these regulations.
Airbags Airbag deployment slows down and restricts
the movement of the vehicle occupant.
When the the airbags are triggered you will
hear a bang, which will not cause any harm to your hearing, and a small amount of powder
may also be released. The
1warning lamp
lights up.
The SRS/AIRBAG symbol indicates the loca-
tion of the airbags. G
Risk of injury
Airbags provide additional protection; they
are not, however, a substitute for seat
belts.
Observe the following notes to reduce the
risk of serious or even fatal injury if an air-
bag is deployed:
R All vehicle occupants — in particular preg-
nant women — must wear their seat belt
correctly at all times and lean back
against the backrest, which should be
positioned as close to the vertical as pos-
sible. The head restraint must support
the back of the head at about eye level.
R Always secure children less than
1.50 m tall or under 12 years of age in
suitable child restraint systems.
R All vehicle occupants must select a seat
position that is as far away from the air-
bag as possible. The driver's seat posi-
tion must allow the vehicle to be driven
safely. The driver's chest should be as far away from the middle of the driver's front
airbag cover as possible.
R Move the front-passenger seat as far
back as possible, especially if a child is
secured in a child restraint system on the
seat.
R Vehicle occupants – in particular, chil-
dren – must not lean their head into the
area of the window in which the sidebag/
windowbag is deployed.
R Rearward-facing child restraint systems
must not be fitted to the front-passenger
seat unless the front-passenger front air-
bag has been disabled. On the front-
passenger seat, the front-passenger
front airbag is only deactivated if a child
restraint system with automatic child
seat recognition is fitted to the front-
passenger seat*. The 5PASSENGER
AIRBAG OFF warning lamp must be con-
stantly lit.
If either the rearward-facing child
restraint system or the front-passenger
seat* of your vehicle do not have auto-
matic child seat recognition, children
must be secured in a child restraint sys-
tem on a suitable seat in the rear. If you Safety
* optional
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Occupant safety
44 secure a forward-facing child restraint
system to the front-passenger seat, you
must move the front-passenger seat as
far back as possible.
R Make sure there are no heavy or sharp-
edged objects in pockets of clothing.
R Do not lean forwards, e.g. over the cover
of the driver's front airbag, particularly
when the vehicle is in motion.
R Do not put your feet on the dashboard.
R Only hold the steering wheel by the rim.
This allows the airbag to inflate fully. You
could be injured if the airbag is deployed
and you are holding the inside of the
steering wheel.
R Do not lean on the doors from inside the
vehicle.
R Make sure that there are no people, ani-
mals or objects between the vehicle
occupants and the area of deployment of
the airbag.
R Do not place any objects between the
seat backrest and the door. R
Do not hang any hard objects, for exam-
ple coat hangers, on the grab handles or
coat hooks.
R Do not attach accessories, e.g. cup hold-
ers, to the doors.
It is not possible to rule out a risk of injuries
caused by an airbag due to the high speed
at which the airbag is required to deploy. G
Risk of injury
The airbag's functionality can only be guar-
anteed if the following parts are not cov-
ered and no badges or stickers are
attached to them:
R Padded steering wheel boss
R Front-passenger front airbag cover
R Outer side of front seats
R Rear door trims G
Risk of injury
When an airbag deploys, a small amount of
powder is released. The powder may cause
short-term breathing difficulties to persons
suffering from asthma or other pulmonary
conditions. In order to prevent potential breathing dif-
ficulties you should leave the vehicle as
soon as it is safe to do so. You can also open
the window to allow fresh air to enter the
interior. The powder does not constitute a
health hazard and does not indicate that
there is a fire in the vehicle. G
Risk of injury
The airbag parts are hot after the airbag has
been deployed. Do not touch them, other-
wise you may burn yourself.
Have the airbags checked at a qualified
specialist workshop. Otherwise, occupants
are not protected by the airbags in the
event of another accident.
Front airbags
The front airbags are designed to increase
protection for the driver's and front-
passenger head and chest. Safety
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Occupant safety
45
The driver's front airbag and front-passenger
front airbag are deployed:
R at the start of an accident with a high rate
of vehicle acceleration or deceleration in a
longitudinal direction
R if the system determines that airbag
deployment can offer additional protection
to that provided by the seat belt
R if the seat belt is fastened
R independently of other airbags in the vehi-
cle
R if the vehicle overturns, but only if the sys-
tem detects high vehicle deceleration in a
longitudinal direction 1
Driver's front airbag
2 Front-passenger front airbag Driver's front airbag
1deploys in front of the
steering wheel; front-passenger front airbag
2 deploys in front of and above the glove
compartment.
On vehicles with automatic child seat recog-
nition in the front-passenger seat*, the front-
passenger front airbag 2is only deployed if
the 5 PASSENGER AIRBAG OFF warning
lamp in the centre console is not lit
(Y page 49). This means that there is not a
child restraint system with automatic child
seat recognition* fitted to the front-
passenger seat or that a child restraint sys-
tem with automatic child seat recognition*
has been fitted to the front-passenger seat
incorrectly.
Sidebags G
Risk of injury
If you wish to use seat covers, Mercedes-
Benz recommends that, for safety reasons,
you only use seat covers that have been
approved for Mercedes-Benz vehicles.
The seat covers must be equipped with a
special tear seam for sidebags. Otherwise,
the sidebag cannot deploy correctly and
would therefore fail to provide the intended
protection in the event of an accident. Appropriate seat covers can be obtained
from a Mercedes-Benz Service Centre.
The purpose of sidebag deployment is to
enhance the level of protection for the thorax
(but not the head, neck or arms) of the vehicle
occupants on the side of the vehicle on which
the impact occurs. Saloon shown as an example
1
Front sidebag
2 Rear sidebag*
The sidebag inflates next to the backrest side
cushions. Safety
* optional
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Occupant safety
46
Sidebags
1and 2are deployed:
R on the side on which an impact occurs
R at the start of an accident with a high rate
of lateral vehicle deceleration or accelera-
tion, e.g. in a side impact
R independently of seat belt use
R independently of the front airbags
R independently of the belt tensioners
R if the vehicle overturns, but only if the sys-
tem detects high vehicle deceleration in a
lateral direction and determines that side-
bag deployment can offer additional pro-
tection to that provided by the seat belt
Windowbags
The purpose of the windowbags is to enhance
the level of protection for the head (but not
chest or arms) of the vehicle occupants on
the side of the vehicle on which the impact
occurs.
The windowbags are integrated into the side
of the roof frame and run from the front door
(A-pillar) to the rear door (C-pillar). Saloon shown as an example
1 Windowbag
Windowbags 1are deployed:
R at the start of an accident with a high rate
of vehicle acceleration or deceleration in a
lateral direction
R on the side on which an impact occurs
R independently of the front airbags
R regardless of whether the front-passenger
seat is occupied
R if the vehicle overturns and the system
determines that windowbag deployment
can offer additional protection to that pro-
vided by the seat belt PRE-SAFE
®
system
PRE-SAFE ®
system takes pre-emptive meas-
ures to protect you in certain hazardous sit-
uations.
PRE-SAFE ®
intervenes in the event of:
R emergency braking situations, e.g. if BAS
Brake Assist intervenes
R critical situations involving driving dynam-
ics, e.g. if the vehicle oversteers or under-
steers significantly due to physical limits
being exceeded
If you are driving faster than approximately
30 km/h, PRE-SAFE ®
takes the following
measures in the aforementioned situations:
R It tensions the front seat belts.
R Vehicles with memory functions*: it
adjusts the front-passenger seat if this is in
an unfavourable position.
R If the vehicle skids, it closes the sliding/
tilting sunroof* and side windows so that
only a small gap remains.
If the hazardous situation passes without
resulting in an accident, PRE-SAFE ®
releases
the belt pretensioning. You can then reverse
all settings made by PRE-SAFE ®
again. Safety
* optional
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Occupant safety
47
If the seat belts are not released:
X
Move the backrest or the seat back slightly
until the belt tension is reduced.
The locking mechanism releases. G
Risk of injury
Make sure when adjusting the seat that
nobody can become trapped.
! Make sure that there are no objects in the
footwell or behind the seats when adjusting
the seats. You could otherwise damage the
seats and the objects. NECK-PRO head restraint
NECK-PRO head restraints are designed to
increase protection to the driver's and front-
passenger's head and neck. To this end, the
head restraints on the driver's and front-
passenger seats are moved forwards and
upwards in the event of a rear-end collision in
the direction of travel. This provides better
head support. G
Risk of injury
Head restraint covers prevent the NECK-
PRO head restraints from triggering cor-
rectly. Consequently, the NECK-PRO head restraints cannot provide the intended level
of protection. Do not use head restraint
covers.
If the NECK-PRO head restraints are triggered
in an accident, you must reset the head
restraints on the driver's and front-passenger
seats (Y page 309). Head restraints that have
been triggered are tilted forwards. Children in the vehicle
If a child is travelling in your vehicle, secure
the child using a child restraint system which
is appropriate to the size and age of the child
and recommended for Mercedes-Benz vehi-
cles. Preferably, you should fit the restraint
system to a suitable rear seat. Ensure that the
child is strapped in throughout the trip.
You can obtain information about the correct
child restraint system from any Mercedes-
Benz Service Centre.
i It is advisable to use Mercedes-Benz care
products to clean child restraint systems.
Information about this can be obtained
from any Mercedes-Benz Service Centre. G
Risk of injury
Do not leave children unsupervised in the
vehicle, even if they are secured in a child
restraint system. Children could injure
themselves on parts of the vehicle. They
could also be seriously or even fatally
injured by prolonged exposure to extreme
heat or cold.
Do not expose the child restraint system to
direct sunlight. The metallic parts of the
child restraint system could heat up and the
child could be burned by them.
If children open a door, they could injure
themselves and others. They could get out
and injure themselves or be injured by a
passing vehicle.
Please also observe the information on
HOLD. Relevant information can be found
in the index. G
Risk of injury
An unsecured or incorrectly positioned load
increases the risk of injury to the child in
the event of:
R an accident
R a braking manoeuvre
R a sudden change of direction Safety
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Occupant safety
48 Do not carry heavy or hard objects inside
the vehicle unless they are secured. You
will find further information under "Loading
guidelines" in the index.
Child restraint systems Mercedes-Benz recommends that you only
use the child restraint systems listed under
(Y page 53). G
Risk of injury
To reduce the risk of serious or even fatal
injury to the child in the event of a sudden
change in direction, braking or an accident:
R Children less than 1.50 m tall and under
twelve years of age must always be
secured in special child restraint systems
on a suitable vehicle seat. This is neces-
sary because the seat belts are not
designed for children of this size.
R Do not secure children under twelve
years of age on the front-passenger seat.
Exception: the child is secured in a vehi-
cle with automatic child seat recognition
on the front-passenger seat* and is
secured in a child restraint system with
automatic child seat recognition. R
If you secure a child restraint system to
the front-passenger seat without auto-
matic child seat recognition*, you must
move the front-passenger seat as far
back as possible.
R Children must never travel sitting on the
lap of another occupant. Due to the
forces occurring in the event of a sudden
change of direction, heavy braking or an
accident, it would not be possible to
restrain the child. The child could be
thrown against parts of the vehicle inte-
rior and be seriously or even fatally
injured. G
Risk of injury
If the child restraint system is not correctly
fitted to a suitable vehicle seat, it cannot
perform its protective function. The child
cannot be restrained in the event of a sud-
den change of direction, heavy braking or
an accident. This may lead to serious or
even fatal injuries. For this reason, when
fitting a child restraint system, observe the
manufacturer's installation instructions
and the correct use of the child restraint
system. Child restraint systems should preferably
be fitted to the rear seats. Children are gen-
erally better protected there.
The entire base of the child restraint system
must always rest on the seat cushion.
Never place objects, e.g. a cushion, under
the child restraint system.
Only use child restraint systems with their
original covers. Only replace damaged cov-
ers with genuine Mercedes-Benz covers.
For safety reasons, you should only use
child restraint systems which have been
approved for use in Mercedes-Benz vehi-
cles.
Child seat on the front-passenger seat Warning on the front-passenger sun visorSafety
* optional
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Occupant safety
49Warning symbol for a rearward-facing child
restraint system G
Risk of injury
If the front-passenger front airbag is not
disabled:
R a child secured in a child restraint system
on the front-passenger seat could be
seriously and even fatally injured by the
front-passenger airbag deploying. This is
especially likely if the child is in the imme-
diate vicinity of the front-passenger front
airbag when it is deployed.
R a child must never be secured on the
front-passenger seat in a rearward-facing
child restraint system. Only secure a rearward-facing child restraint system on
a suitable rear seat.
R always move the front-passenger seat to
the rearmost position if you secure a
child in a forward-facing child restraint
system on the front-passenger seat.
The front-passenger front airbag is not dis-
abled:
R on vehicles without automatic child seat
recognition in the front-passenger seat*
R on vehicles with automatic child seat rec-
ognition on the front-passenger seat* if
there is no child restraint system with
automatic child seat recognition fitted to
the front-passenger seat.
R on vehicles with automatic child seat rec-
ognition on the front-passenger seat* if
the 5 PASSENGER AIRBAG OFF warn-
ing lamp is not lit.
To draw attention to this danger, there is an
appropriate warning sticker on the dash-
board as well as on both sides of the sun
visor on the front-passenger side. Information about recommended child
restraint systems is available at any
Mercedes-Benz Service Centre.
Automatic child seat recognition on the
front-passenger seat*
If your vehicle does not have automatic child
seat recognition on the front-passenger seat,
this is indicated by a special sticker. The
sticker is affixed to the side of the dashboard
on the front-passenger side. It is visible when
you open the front-passenger door.
The warning lamp 6
is located on the centre
console. 1
5 PASSENGER AIRBAG OFF warning
lamp
6 Vehicles without automatic child seat recognition in the front-passenger seat: the warning lamp lights up briefly when you turn the key to position 2 in the ignition
lock. However, it has no function and does not indicate that there is automatic child seat recognition on the front-passenger seat. Safety
* optional
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Occupant safety
50
The front-passenger seat sensor system for
child restraint systems detects whether a
special Mercedes-Benz child seat with auto-
matic child seat recognition has been fitted.
In such cases, 5PASSENGER AIRBAG
OFF indicator lamp 1lights up. The front-
passenger airbag is deactivated. G
Risk of injury
If the 5 PASSENGER AIRBAG OFF warn-
ing lamp does not light up when the child
restraint system is fitted, the front-
passenger front airbag has not been disa-
bled. If the front-passenger front airbag is
deployed, the child could be seriously or
even fatally injured.
Proceed as follows:
R do not use a rearward-facing child
restraint system on the front-passenger
seat.
R fit a rearward-facing child restraint sys-
tem on a suitable rear seat. or
R
only use a forward-facing child restraint
system on the front-passenger seat and
move the front-passenger seat to its rear-
most position.
R have the automatic child seat recognition
checked at a qualified specialist work-
shop.
To ensure that the automatic child seat rec-
ognition on the front-passenger seat func-
tions correctly, never place objects (such
as a cushion) under the child restraint sys-
tem. The entire base of the child restraint
system must always rest on the seat cush-
ion. An incorrectly fitted child restraint sys-
tem cannot perform its intended protective
function in the event of an accident, and
could lead to injuries.
i The windowbag, the sidebag and the belt
tensioner on the front-passenger side are still active even when the front-passenger
front airbag is disabled. G
Risk of injury
Do not place items of electronic equipment
on the front-passenger seat, e.g.:
R laptops, when switched on
R mobile phones
R cards with transponders, e.g. ski passes
or access cards
Signals from electronic equipment can
cause interference in the automatic child
seat recognition sensor system. This can
lead to a system malfunction. This may
cause the 5PASSENGER AIRBAG OFF
warning lamp to light up without there
being a child seat with automatic child seat
recognition fitted. This means that the
front-passenger airbag is not deployed dur-
ing an accident. It is also possible that the
5 PASSENGER AIRBAG OFF warning
lamp will not light up briefly if you turn the
key in the ignition lock to position 2.Safety
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