belt SMART FORTWO COUPE ELECTRIC DRIVE 2015 User Guide

seats, always follow the child seat man-
ufacturer’s instructions. Emergency Tensioning Devices (ETDs)
and seat belt force limiters
The seat belts are equipped with Emer-
gency Tensioning Devices and seat belt
force limiters.
Emergency Tensioning Devices are
designed to activate in the following
cases:
R in frontal or rear-end impacts exceed-
ing the system deployment threshold
R if the restraint systems are operational
and functioning correctly
R in collisions with high vehicle decel-
eration/acceleration in the longitudi-
nal direction, e.g. a head-on collision
R on passenger side when the seat is occu-
pied and the seat belt is fastened
R independently of the front air bags
When activated, Emergency Tensioning
Devices remove slack from the seat belts in such a way that the seat belts fit more
snugly against the body. Seat belt force
limiters, when activated, reduce the force
exerted by the seat belts on occupants dur-
ing a crash.
When the emergency tensioning device is
triggered, the SRS indicator lamp 6in
the instrument cluster illuminates, see
“SRS indicator lamp” (Y page 169).G
WARNING
Once they have been triggered, Emergency
Tensioning Devices will no longer function properly and must be replaced. smart rec-
ommends that you visit a qualified work-
shop to have this done. In particular, work
relevant to safety or on safety-related sys-tems must be carried out at a qualified
specialist workshop.
Comply with safety regulations when dis-
posing of Emergency Tensioning Devices. These regulations are available at any
smart center.
The belt force limiter is designed to oper- ate in unison with the front air bag, which
absorbs a portion of the seat belt’s decel-
erating forces, distributing the load over
a larger area.
In the event of a head-on or rear-end col-
lision, the emergency tensioning device is
activated if the vehicle is decelerated or
accelerated sufficiently in the longitudi- nal direction at the start of impact with theignition switched on. Air bags
Air bags can reduce the severity of inju-
ries in serious collisions, e.g. in a head-
on collision or a side impact. G
WARNING
Air bags are designed to reduce the poten- tial of injury in certain frontal impacts
(front air bags and knee bags), or side
impacts (head-thorax air bags, window
curtain air bags and thorax-pelvis air
bags) which may cause significant inju-
ries. However, no system available today
can completely eliminate injuries and
fatalities.
The deployment of the air bags temporarily
releases a small amount of dust from the air
bags. This dust is neither injurious to your health, nor does it indicate a fire in the
vehicle. The dust might cause some tempo-
rary breathing difficulty for people with
asthma or other breathing trouble. To avoid
this, you may wish to get out of the vehicle
as soon as it is safe to do so. If you have any
breathing difficulty but cannot get out of
the vehicle after the air bag inflates, then get fresh air by opening a window or door. G
WARNING
To reduce the risk of injury when the front
air bags inflate, it is very important for Occupant safety
33>> Safety.
Z

the driver and passenger to always be in a
properly seated position and to wear their respective seat belt.
For maximum protection in the event of a
collision always be in normal seated posi-
tion with your back against the backrest.
Fasten your seat belt and ensure it is prop-
erly positioned on your body.
Since the air bag inflates with considera- ble speed and force, a proper seating and
hands on steering wheel position will help
to keep you at a safe distance from the air
bag.
Occupants who are unbelted, out of position
or too close to the air bag can be seriously
injured or killed by an air bag as it
inflates extremely quickly and with great
force:
R Sit properly belted in a position that is
as upright as possible with your back
against the seat backrest.
R Adjust the driver’s seat as far as possible
rearward, still permitting proper oper-
ation of vehicle controls. The distance
from the center of the driver’s breast-
bone to the center of the air bag cover on
the steering wheel must be at least
10 inches (25 cm) or more. You should be
able to accomplish this by adjustments to the seat. If you have any problems, please contact an authorized electric drive
smart center.
R Do not lean your head or chest close to the
steering wheel or dashboard.
R Keep hands on the outside of the steering
wheel rim. Placing hands and arms inside the rim can increase the risk and poten-
tial severity of hand/arm injury when the
driver’s front air bag inflates.
R Adjust the passenger seat as far as pos-
sible rearward from the dashboard when
the seat is occupied.
R Occupants, especially children, should
never place their bodies or lean their
heads in the area of the door where the
head-thorax air bag (cabriolet) or thorax-pelvis side air bag (coupé)
inflates. This could result in serious
injuries or death should the head-thorax air bag (cabriolet) or thorax-pelvis side
air bag (coupé) be deployed. Always sit as
upright as possible, wear the seat belt
properly and use an appropriately sized
infant restraint, toddler restraint, or
booster seat recommended for the size
and weight of the child.
Failure to follow these instructions can
result in severe injuries to you or other
occupants.
If you sell your vehicle, it is important that you make the buyer aware of this safety
information. Be sure to give the buyer this
Operator’s Manual.
i Air bags are designed to deploy only in
certain frontal impacts (front air bags
and knee bags), or side impacts (head-
thorax air bags, window curtain air bags and thorax-pelvis air bags) which
exceed preset thresholds. Only during
these events will they provide their sup-
plemental protection.
The driver and passenger should always
wear their seat belts. Otherwise it is not
possible for air bags to provide their
supplemental protection.
In case of other types of impacts and
impacts below air bag deployment
thresholds, air bags will not deploy. The
driver and passenger will then be pro-
tected to the extent possible by a prop-
erly fastened seat belt. A properly fas-
tened seat belt is also needed to provide the best possible protection in a roll-
over.
We caution you not to rely on the presence
of the air bags in order to avoid wearing your seat belt.
It is important to your safety and that of
your passenger that you replace deployed
air bags and repair any malfunctioning
air bags to make sure the vehicle will 34
Occupant safety>> Safety.

continue to provide supplemental crash
protection for occupants.
Safety guidelines for the seat belt,
Emergency Tensioning Devices (ETDs)
and air bag G
WARNING
R Damaged seat belts or seat belts that have
been highly stressed in an accident must
be replaced and their anchoring points
must also be checked. Only use seat belts installed or supplied by an authorized
electric drive smart center.
R Air bags and Emergency Tensioning
Devices (ETDs) contain Perchlorate
material, which may require special
handling and regard for the environment.
Check with your local government’s dis-
posal guidelines. California residents,
see http://www.dtsc.ca.gov/
HazardousWaste/Perchlorate/index.cfm .
R Given the considerable deployment
speed, required inflation volume, and
the textile structure of the air bags,
there is the possibility of abrasions or
other, potentially more serious injuries
resulting from air bag deployment.
R Air bags and Emergency Tensioning
Devices (ETDs) are designed to function
on a one-time-only basis. An air bag or
ETD that has deployed must be replaced.
R Do not pass seat belts over sharp edges.
They could tear.
R Do not make any modification that could
change the effectiveness of the seat
belts.
R No modifications of any kind may be made
to any components or wiring of the SRS.
This includes changing or removing any
component or part of the SRS, the instal-lation of additional trim material,
badges, etc. over the steering wheel hub,
passenger front air bag cover, outboard
sides of the seat backrests, and instal-
lation of additional electrical/elec- tronic equipment on or near SRS compo-
nents and wiring. Keep area between air
bags and occupants free from objects
(e.g. packages, purses, umbrellas, etc.).
R Do not bleach or dye seat belts as this may
severely weaken them. In a crash they may
not be able to provide adequate protec-
tion.
R Do not hang hangers on the coat hooks or
handles over the door. These items may
turn into projectiles and cause head and
other injuries when the head-thorax air
bag is deployed.
R Air bag system components will be hot
after an air bag has inflated. Do not touch
them.
R Never place your feet on the instrument
panel, dashboard, or on the seat. Always
keep both feet on the floor in front of the
seat.
R In addition, improper repair work on the
SRS creates a risk of rendering the SRS
inoperative or causing unintended air
bag deployment. Work on the SRS must
therefore only be performed by qualified
technicians. Contact an authorized elec- tric drive smart center.
R For your protection and the protection of
others, when scrapping the air bag unit
or Emergency Tensioning Devices (ETDs), our safety instructions must be followed.
These instructions are available from
any authorized electric drive smart cen-
ter.
How an air bag operates An air bag is inflated in a matter of mil-
liseconds. If an air bag is triggered, the
SRS indicator lamp
6in the instrument
cluster illuminates.
! If the air bags are activated, you will
hear a loud noise and some dust may be
generated. The explosion fundamentally
represents no risk to your hearing. Occupant safety
35>> Safety. Z

An inflated air bag slows down and reduces
the movement of the occupant. When the
occupant makes contact with a front air bag
or head-thorax air bag (cabriolet only),
hot gas flows out of the inflated front air
bags and head-thorax air bags (cabriolet
only). This reduces the load on the occu-
pant’s head and upper body. These air bags
are consequently deflated after the acci-
dent.
Driver front air bag/passenger front air
bag The front air bags are designed to reduce
the potential of injury in certain frontal
impacts.
Driver front air bag and passenger front
air bag are deployed
R at the start of an accident with high
vehicle deceleration in the longitudinal direction
R independently of other air bags in the
vehicle being deployed
R never in the event of a rollover, unless
high vehicle deceleration in the longi-
tudinal direction is detected
i The front air bags in this vehicle have
been designed to inflate in two stages.
This allows the air bag to have different rates of inflation that are based on the
rate of relevant vehicle deceleration
and a fastened or unfastened seat belt as assessed by the air bag control unit.
On the passenger side, the front air bag
deployment is additionally influenced
by the passenger’s weight category as
identified by the Occupant Classifica-
tion System (OCS) (Y page 39).
The lighter the passenger side occupant,
the higher the vehicle deceleration rate required for the second stage inflation
of the air bag.
The air bags will not deploy in impacts
which do not exceed the system’s deploy- ment thresholds. In such instances, the seat
belts are designed to protect you.
The passenger air bag will only be
deployed if
R the system, based on OCS weight sensor
readings, senses that the passenger seat
is occupied and the 40
indicator lamp is not lit (Y page 41)
R the impact exceeds a preset deployment
threshold
The driver front air bag is located in the
steering wheel housing, the passenger
front air bag above the glove box. :
Driver front air bag
; Passenger front air bag
Knee bags :
Driver’s knee bag
; Passenger knee bag
The knee bags are designed to provide
increased protection for the driver and
passenger against the risk of injuries to
the knees, thighs and lower legs. The knee
bags are located on the lower instrument 36
Occupant safety>> Safety.

panel. They are designed to operate
together with the front air bags in certain
frontal impacts if the system determines
that air bag deployment can offer addi-
tional protection to that provided by the
seat belts. Knee bags operate best in con-
junction with a properly positioned and
fastened seat belts.
Head-thorax air bags (cabriolet only) G
WARNING
There is a possibility for a head-thorax air bag related injury if occupants, especially children, are not properly seated or
restrained when next to a head-thorax air
bag which needs to deploy rapidly in a side
impact in order to do its job.
To help avoid the possibility of injury,
please follow these guidelines:
(1) Occupants, especially children, should never place their bodies
or lean their heads in the area of
the door where the head-thorax
air bag inflates. This could
result in serious injuries or
death should the head-thorax air
bag be deployed.
(2) Always sit as upright as possi- ble, properly use the seat belts,
and for all children 12 years old
or under, use an appropriately
sized infant restraint, toddler
restraint, or booster seat rec-
ommended for the size and
weight of the child.
(3) Always wear seat belts properly. G
WARNING
Only use seat covers which have been tested and approved by smart for your vehicle
model. A seat cover must have a deploymentcontrol seam for the head-thorax air bag.
Using other seat covers may interfere with
or prevent the deployment of the head-
thorax air bags. Contact an authorized electric drive smart center for availabil-
ity.
If activated, the head-thorax air bags are
intended to provide increased protection
for the head and thorax (but not arms) of the
occupants on the side of the vehicle that is struck.
The head-thorax air bags are deployed
R on the side of the vehicle that is struck
(when passenger side is struck only if the
seat is occupied)
R at the start of an accident with high
vehicle deceleration or acceleration
acting in a lateral direction, e.g. a side
impact
R regardless of whether or not the seat belt
is in use
R independently of the front air bags
being deployed
R independently of the emergency tension-
ing device
The head-thorax air bags are integrated
into the driver and passenger seat backr-
ests. :
Head-thorax air bag
Window curtain air bags and thorax-pel- vis side air bags (coupé only) G
WARNING
There is a possibility for a thorax-pelvis
side air bag related injury if occupants,
especially children, are not properly
seated or restrained when next to a thorax- Occupant safety
37>> Safety.
Z

pelvis side air bag which needs to deploy
rapidly in a side impact in order to do its
job.
To help avoid the possibility of injury,
please follow these guidelines:
(1) Occupants, especially children, should never place their bodies
or lean their heads in the area of the door where the thorax-pelvis
side air bag inflates. This could
result in serious injuries or
death should the thorax-pelvis
side air bag be deployed.
(2) Always sit as upright as possi- ble, properly use the seat belts,
and for all children 12 years old
or under, use an appropriately
sized infant restraint, toddler
restraint, or booster seat rec-
ommended for the size and
weight of the child.
(3) Always wear seat belts properly. G
WARNING
Only use seat covers which have been tested and approved by smart for your vehicle
model. A seat cover must have a deploymentcontrol seam for the thorax-pelvis side air
bag. Using other seat covers may interfere
with or prevent the deployment of the
thorax-pelvis side air bags. Contact an
authorized electric drive smart center for
availability.
Window curtain air bags
Window curtain air bags are designed to
provide increased protection for the head, but not the chest or arms.
Window curtain air bags are deployed
R on the impacted side of the vehicle
R in instances with a high rate of lateral
vehicle deceleration or acceleration
R independently of the front air bags R
regardless of whether the passenger seat
is occupied
R in a rollover if the system determines
that air bag deployment can offer addi-
tional protection to that provided by the
seat belt.
The window curtain air bags are integrated
into the inner side of the roof frame. They
run above the doors from the A-pillar to the B-pillar. :
Window curtain air bags
Thorax-pelvis side air bags
Thorax-pelvis side air bags are designed
to provide increased protection for the
thorax and pelvis, but not the arms.
Thorax-pelvis side air bags are deployed
R on the impacted side of the vehicle
R in instances with a high rate of lateral
vehicle deceleration or acceleration
R independently of the front air bags
R regardless of whether the seat belt on the
impacted side of the vehicle is in use
R independently of the ETDs.
Thorax-pelvis side air bags will generally not deploy in a rollover.
The thorax-pelvis side air bags will
deploy, however, if the system detects
R a high rate of lateral vehicle decelera-
tion or acceleration, and
R that air bag deployment can offer addi-
tional protection to that provided by the
seat belt. 38
Occupant safety>> Safety.

The thorax-pelvis side air bags are inte-
grated into the driver and passenger seat
backrests. :
Thorax-pelvis side air bags Occupant Classification System
The Occupant Classification System (OCS)
automatically turns the passenger front air bag on or off based on the classified occu-pant weight category determined by weight
sensor readings from the passenger seat.
i Based on the classified occupant
weight category determined by weight
sensor readings from the passenger seat,
the system does also deactivate
R head-thorax air bag (cabriolet)
R the window curtain air bag (coupé)
R the thorax-pelvis side air bag (coupé)
R the seat Emergency Tensioning Devi-
ces
R the seat belt force limiter.
Occupants must sit properly belted in a
position that is as upright as possible with their back against the seat backrest and
feet on the floor to be correctly classified.
If the occupant’s weight is transferred to
another object in the vehicle (e.g. by lean-
ing on armrests), the OCS may not be able to properly approximate the occupant’s
weight category.
i If the seat, including the trim cover and
cushion, needs to be serviced in any way, take the vehicle to an authorized elec- tric drive smart center. Only seat acces-
sories approved by smart may be used.
Both driver and the passenger should
always use the 40indicator
lamp as an indication of whether or not
the passenger is properly positioned
(Y page 41). G
WARNING
If the 40indicator lamp illu-
minates when an adult or someone larger
than a small individual is in the passenger seat, have the passenger re-position him-
self or herself in the seat until the
40indicator lamp goes out.
In the event of a collision, the air bag con- trol unit will not allow passenger front air
bag deployment when the OCS has classified
the passenger seat occupant as being up to
or less than the weight of a typical
12‑month‑old child in a standard child
restraint, or if the passenger seat is
sensed as being empty.
When the OCS senses that the passenger seat occupant is classified as being up to or
less than the weight of a typical
12‑month‑old child in a standard child
restraint, the 40indicator
lamp will illuminate when the ignition is
switched on and remain illuminated, indi-
cating that the passenger front air bag is
deactivated.
When the OCS senses that the passenger seat is classified as being empty, the
40indicator lamp will illu-
minate and remains illuminated.
When the OCS senses that the passenger seat occupant is classified as being heavier
than the weight of a typical 12‑month‑old
child seated in a standard child restraint
or as being a small individual (such as a
young teenager or a small adult), the
40indicator lamp will illu-
minate for approximately 4 seconds when
the ignition is switched on and then,
depending on occupant weight sensor read- Occupant safety
39>> Safety.
Z

ings from the seat, remains illuminated or
goes out.
When the 40indicator lamp is
illuminated, the passenger front air bag is
deactivated.
When the 40indicator lamp is
out and the passenger seat is occupied by an adult or someone larger than a small indi-
vidual, the passenger front air bag is acti-
vated.
When the OCS senses that the passenger seat occupant is classified as an adult or some- one larger than a small individual, the
40indicator lamp will illu-
minate for approximately 4 seconds when
the ignition is switched on and then goes
out, indicating that the passenger front air
bag is activated.
If the 40indicator lamp is
illuminated, the passenger front air bag is
deactivated and will not be deployed.
If the 40indicator lamp is not
illuminated, the passenger front air bag is
activated and will be deployed
R in the event of certain frontal impacts
R if impact exceeds a preset deployment
threshold
R independently of the head-thorax air
bags
If the passenger front air bag is deployed, the rate of inflation will be influenced by
R the rate of vehicle deceleration and a
fastened or unfastened seat belt as
assessed by the air bag control unit
R the passenger’s weight category as iden-
tified by the OCS G
WARNING
Children 12 years old and under must be
seated and properly secured in an appro-
priate infant or child restraint recommen- ded for the size and weight of the child.
The infant or child restraint must be prop-
erly secured with the vehicle’s seat belt, fully in accordance with the child seat
manufacturer’s instructions.
Children can be killed or seriously injured by an inflating air bag. Note the following
important information:
R Your vehicle is equipped with air bag
technology designed to turn off the
passenger front air bag in your vehicle
when the system senses the weight of a
typical 12‑month‑old child or less along
with the weight of a standard appropri-
ate child restraint on the passenger seat.
R A child in a rear-facing child restraint
on the passenger seat will be seriously
injured or even killed if the passenger
front air bag inflates in a collision
which could occur under some circum-
stances, even with the air bag technology
installed in your vehicle.
R If you install a rear-facing child
restraint on the passenger seat, make
sure the 40indicator lamp
is illuminated, indicating that the
passenger front air bag is deactivated.
Should the 40indicator
lamp not illuminate or go out while the
restraint is installed, please check
installation.
Periodically check the 40
indicator lamp while driving to make
sure the 40indicator lamp
is illuminated.
If the 40indicator lamp
goes out or remains out, do not transport a child on the passenger seat until the
system has been repaired.
A child in a rear-facing child restraint
on the passenger seat may be seriously
injured or even killed if the passenger
front air bag inflates.
R If you place a child in a forward-facing
child restraint on the passenger seat,
move the seat as far back as possible, use
the proper child restraint recommended
for the age, size and weight of the child 40
Occupant safety>> Safety.

by the seat manufacturer, and secure
child restraint with the vehicle’s seat
belt according to the child seat manu-
facturer’s instructions. For children
larger than the typical 12‑month‑old
child, the passenger front air bag may or may not be activated.
i Deployment of the driver front air bag
does not mean that the passenger front
air bag also should have deployed.
The Occupant Classification System may
have determined R that the seat was empty or occupied by the
weight up to or less than that of a typical 12‑month‑old child seated in a standard
child restraint — both instances where
the system suppresses deployment of the
passenger front air bag even though the
impact met the criteria and was of suf-
ficient severity to deploy the driver
front air bag
R that the seat was occupied by a small
individual (such as a young teenager or a
small adult) or a child weighing more
than the weight of a typical 12‑month‑old
child in a standard child restraint —
instances where the system may suppress deployment of the passenger front air
bag even though the impact met the cri-
teria and was of sufficient severity to
deploy the driver front air bag
Passenger front air bag off indicator
lamp The indicator lamp is located on the over-
head control panel. Passenger front air bag off indicator
lamp
:illuminates when the passenger
front air bag is deactivated. G
WARNING
When the SRS indicator lamp 6and the
40indicator lamp are lit at
the same time, there is a malfunction in the Occupant Classification System.
In order to ensure proper operation of the
air bag system and OCS:
R Have the system checked as soon as pos-
sible by qualified technicians. Contact
an authorized electric drive smart cen-
ter.
R Sit properly belted in a position that is
as upright as possible with your back
against the seat backrest.
R Do not lean on the armrests or lift your-
self from the seat by using the handle
over the door as this may cause the OCS to
be unable to correctly approximate the
occupant weight category.
R Only have the seat repaired or replaced
by an authorized electric drive smart
center.
R Read and observe all warnings in this
chapter.
Self-test Occupant Classification Sys-
tem After turning the key in the starter switch
to position
1or 2, the 40
indicator lamp located in the center con-
sole illuminates. If an adult occupant is Occupant safety
41>> Safety. Z

properly sitting on the passenger seat and
the system senses the occupant as being an
adult, the 40indicator lamp
will illuminate and go out after approx-
imately 4 seconds.
If the seat is not occupied and the system
senses the passenger seat as being empty,
the 40indicator lamp will
illuminate and not go out. G
WARNING
If the 40indicator lamp does
not illuminate immediately after switch-
ing on the drive system, the system is not
functioning. You must contact an author-
ized electric drive smart center before
seating any child on the passenger seat.
More information can be found in the
“Practical hints” section (Y page 175).G
WARNING
Never place anything between seat cushion and child seat (e.g. pillow), since it
reduces the effectiveness of the Occupant
Classification System. The bottom of the
child seat must make full contact with the
passenger seat cushion. An incorrectly
mounted child seat could cause injuries to
the child in case of an accident, instead of increasing protection for the child.
Follow the manufacturer’s instructions for
installation of child seats. Children in the vehicle
If an infant or child is traveling with you
in the vehicle:
X Secure the child using an infant or child
restraint appropriate to the age and size of the child.
X Make sure the infant or child is properly
secured at all times while the vehicle is in motion. G
WARNING
Do not leave children unattended in the
vehicle, even if they are secured in a child restraint system. The children could
R injure themselves on parts of the vehicle
R be seriously or fatally injured through
excessive exposure to extreme heat or
cold
Do not expose the child restraint system to
direct sunlight. The child restraint sys-
tem’s metal parts, for example, could
become very hot, and the child could be
burned on these parts.
If children open a door, they could
R injure other persons
R get out of the vehicle and injure them-
selves or be injured by following traffic
Do not carry heavy or hard objects in the
passenger compartment unless they are
firmly secured in place.
For more information, please refer to the
“Loading and storing section”.
Unsecured or improperly positioned cargo
increases a child’s risk of injury in the
event of
R strong braking maneuvers
R sudden changes of direction
R an accident
Infant and child restraint system We recommend all infants and children be
properly restrained at all times while the
vehicle is in operation.
The passenger lap-shoulder belt has a spe-
cial seat belt retractor for secure fasten-
ing of child restraints.
To fasten a child restraint, follow all
mounting instructions provided by the
child restraint manufacturer. Then pull the
shoulder seat belt out completely and let it
retract. During seat belt retraction, a
ratcheting sound can be heard to indicate
that the special seat belt retractor is acti- 42
Occupant safety>> Safety.