SMART FORTWO COUPE 2015 Service Manual

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.

vated. The seat belt is now locked. Push
down on child restraint to take up any
slack.
To deactivate, release seat belt buckle and
let seat belt retract completely. To deac-
tivate the special seat belt retractor for
the passenger seat, the passenger seat must be in the most backward position. The seatbelt can again be used in the usual manner. G
WARNING
Never release the seat belt buckle while the vehicle is in motion, since the special seatbelt retractor will be deactivated.
The use of infant or child restraints is
required by law in all 50 states, the Dis-
trict of Columbia, the U.S. territories, and
all Canadian provinces and territories.
Infants and small children should be seated in an appropriate infant or child restraint
system properly secured in accordance
with the manufacturer’s instructions for
the child restraint, that complies with U.S. Federal Motor Vehicle Safety Standards 213and 225 and Canadian Motor Vehicle Safety
Standards 213, 213.1 and 213.2.
A statement by the child restraint manu-
facturer of compliance with these stand-
ards can be found on the instruction label
on the restraint and in the instruction
manual provided with the restraint.
When using any infant restraint, toddler
restraint, or booster seat be sure to care-
fully read and follow all manufacturer’s
instructions for installation and use.
Please read and observe warning labels
affixed to the inside of the vehicle and to
infant or child restraints. G
WARNING
Children 12 years old and under must be
seated and properly secured in an appro-
priately sized infant restraint, toddler
restraint, or booster seat recommended 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.
Occupants, especially children, should
never place their bodies or lean their
heads in the area of the door where the
head-thorax air bags (cabriolet), window
curtain air bags (coupé) and thorax-pelvis
air bags (coupé) inflates. This could result in serious injuries or death should the
head-thorax air bags (cabriolet), window
curtain air bags (coupé) and thorax-pelvis
air bags (coupé) be triggered. Always sit as
upright as possible, properly use the seat
belt and use an appropriately sized infant
restraint, toddler restraint, or booster
seat recommended for the size and weight of
the child.
Children can be killed or seriously injured by an inflating air bag. Note the following
important information when circumstances
require you to place a child in the
passenger seat:
R Your vehicle is equipped with air bag
technology designed to turn off the
passenger front air bag in your vehicle
when the Occupant Classification System
senses the weight of a typical
12‑month‑old child or less along with the
weight of an appropriate child restraint
on the passenger seat.
R 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 in a collision.
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
40indicator lamp while Occupant safety
43>> Safety.
Z

driving to make sure the
40
indicator 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 a proper child restraint recommended
for the age, size and weight of the child,
and secure child restraint with the vehi- cle’s seat belt according to the child seat
manufacturer’s instructions. For chil-
dren larger than the typical
12‑month‑old child, the passenger front
air bag may or may not be activated. G
WARNING
Infants and small children should never
share a seat belt with another occupant.
During an accident, they could be crushed
between the occupant and seat belt.
A child’s risk of serious or fatal injuries is
significantly increased if the child
restraints are not properly secured in the
vehicle and/or the child is not properly
secured in the child restraint.
Children too big for a toddler restraint
must ride in a seat using regular seat belt.
Position shoulder belt across chest and
shoulder, not face or neck. A booster seat
may be necessary to achieve proper seat
belt positioning for children over 41 lbs
until they reach a height where a lap-
shoulder belt fits properly without a boos- ter.
When the child restraint is not in use,
remove it from the vehicle or secure it with
the seat belt to prevent the child restraint from becoming a projectile in the event of
an accident. Do not leave children unattended in the
vehicle, even if the children are secured in
a child restraint system. Unsupervised
children in a child restraint system may
use vehicle equipment and may cause an
accident and/or serious personal injury.
If you are using a rear-facing child
restraint system on the passenger seat, you
must verify that the passenger front air bag is deactivated. When the passenger front
air bag is deactivated, the 40
indicator lamp is illuminated (Y page 41).
Top tether
Top tether permits an additional connec-
tion between a child restraint system and
the passenger seat. Proper usage of the top
tether, in accordance with instructions
provided by the child restraint manufac-
turer, can further reduce the risk of inju-
ries.
The top tether anchorage is located on the
floor of the cargo compartment. The top
tether guide for the top tether strap is
located above, on the head restraint. 44
Occupant safety>> Safety.

X
Thread top tether strap Athrough top
tether guide :down the back of
passenger seat ;to top tether anchor-
age =.
X Attach top tether hook ?to top tether
anchorage =on the floor of the cargo
compartment.
i If you are using divider plus*, the
hooks of the top tether and the divider
plus* are attached to the same anchorage.
X Install the child restraint system and
tighten top tether strap Aaccording to
the child restraint manufacturer’s
instructions. G
WARNING
After installing top tether straps, make
sure the seat backrests are in an upright
position and are properly locked. Push and pull on the seat backrests to ensure they are
properly secured in the locked position. If
a seat backrest is not properly locked, the
seat backrest could fold. The child seat
would no longer be properly supported or
positioned to provide its intended bene-
fit. That could cause serious or even fatal
injuries. Panic alarm X
Activating: Press and hold button :for
at least 1 second.
An audible alarm and flashing exterior
lamps will operate briefly.
X Deactivating: Press button:once more.
or
X Insert the key in the starter switch.
i USA only:
This device complies with Part 15 of the
FCC Rules. Operation is subject to the
following two conditions:
1. This device may not cause harmful
interference, and
2. this device must accept any interfer-
ence received, including interference
that may cause undesired operation.
Any unauthorized modification to this
device could void the user’s authority to
operate the equipment.
The product label with FCC ID and IC cer- tification number can be found in the
battery case.
i Canada only:
This device complies with RSS‑210 of
Industry Canada. Operation is subject to
the following two conditions:
1. This device may not cause interfer-
ence, and
2. this device must accept any interfer-
ence received, including interference
that may cause undesired operation of
the device.
Any unauthorized modification to this
device could void the user’s authority to
operate the equipment.
The product label with FCC ID and IC cer-
tification number can be found in the
battery case. Panic alarm
45>> Safety.
* optional Z

Driving safety systems
Introduction
G
WARNING
The following factors increase the risk of
accidents:
R Excessive speed, especially in turns
R Wet and slippery road surfaces
R Following another vehicle too closely
The driving safety systems described in
this section cannot reduce these risks or
prevent the natural laws of physics from
acting on the vehicle.
Always adapt your driving style to the pre- vailing road and weather and traffic con-
ditions and keep a safe distance to other
road users and objects on the street.
i In winter operation, the maximum
effectiveness of the ABS, the hydraulic
brake assistant, and the ESP ®
is only ach-
ieved with winter tires (Y page 146) or
snow chains* as required. Antilock Brake System (ABS)
G
WARNING
Do not pump the brake pedal. Use firm,
steady brake pedal pressure instead. Pump- ing the brake pedal defeats the purpose of
the ABS and significantly reduces braking
effectiveness.
The Antilock BrakeSystem (ABS) regulates
the brake pressure so that the wheels do not lock during braking. This allows you to
maintain the ability to steer your vehicle.
On slippery road surfaces, the ABS will
respond even to light brake pressure.
The ABS indicator lamp in the instrument
cluster (Y page 24) comes on when you
switch on the ignition. It goes out when the drive system is active. Braking At the instant one of the wheels is about to
lock up, a slight pulsation can be felt in the
brake pedal, indicating that the ABS is
regulating the brake pressure.
X Keep firm and steady pressure on the
brake pedal while experiencing the pul-
sation.
Continuous, steady brake pedal pressure
yields the advantages provided by the ABS,
namely braking power and the ability to
steer the vehicle.
A pulsating brake pedal can be an indica-
tion of hazardous road conditions and
functions as a reminder to take extra care
while driving.
Emergency brake maneuver X
Keep continuous full pressure on the
brake pedal. G
WARNING
When the ABS is malfunctioning, the
hydraulic brake assistant and the ESP ®
are
also switched off.
When the ABS is malfunctioning, the wheels may lock during hard braking, reducing
steering capability and extending the
braking distance. G
WARNING
The ABS cannot prevent the natural laws of
physics from acting on the vehicle, nor can it increase braking or steering efficiency beyond that afforded by the condition of the
vehicle brakes and tires or the traction
afforded. The ABS cannot prevent acci-
dents, including those resulting from
excessive speed in turns, following
another vehicle too closely, or hydroplan-
ing. Only a safe, attentive, and skillful
driver can prevent accidents. The capabil- ities of an ABS equipped vehicle must never
be exploited in a reckless or dangerous 46
Driving safety systems>> Safety.
* optional

manner which could jeopardize the user’s
safety or the safety of others. Electronic Stability Program (ESP
®
)
Your vehicle is equipped with the Elec-
tronic Stability Program (ESP ®
). The ESP ®
is operational as soon as the drive system
is switched on and it monitors the vehicle’s traction (force of adhesive friction
between the tires and the road surface) and
handling.
The ESP ®
recognizes when a wheel is spin-
ning or if the vehicle starts to skid. By
applying brakes to the appropriate wheel
and by limiting the power output, the ESP ®
works to stabilize the vehicle. The ESP ®
is
especially useful while driving off and on
wet or slippery road surfaces. The ESP ®
also
stabilizes the vehicle during braking and
steering maneuvers.
The ESP ®
warning lamp ÷in the instru-
ment cluster flashes when the ESP ®
is
engaged.
The ESP ®
warning lamp ÷in the instru-
ment cluster comes on when you switch on
the ignition. It goes out when the drive
system is active.
Depending on the driving situation, the
ESP ®
R reduces the speed
R selectively brakes individual wheels
R equalizes the speed of the driven wheels
R stabilizes the vehicle when braking
R assists you in evasive maneuvers on all
roads G
WARNING
If the ESP ®
warning lamp ÷in the
instrument cluster flashes, proceed as fol-
lows:
R While driving off, apply as little throt-
tle as possible.
R While driving, ease up on the accelerator
pedal.
R Adapt your speed and driving style to the
prevailing road conditions.
Failure to observe these guidelines could
cause the vehicle to skid.
The ESP ®
cannot prevent accidents result-
ing from excessive speed. G
WARNING
The ESP ®
cannot prevent the natural laws of
physics from acting on the vehicle, nor can
it increase the traction afforded. The ESP ®
cannot prevent accidents, including those
resulting from excessive speed in turns, or
hydroplaning. Only a safe, attentive, and
skillful driver can prevent accidents. The
capabilities of an ESP ®
equipped vehicle
must never be exploited in a reckless or
dangerous manner which could jeopardize
the user’s safety or the safety of others.
! Because the ESP ®
operates automati-
cally, the ignition must be switched off
when the parking brake is being tested
on a brake test dynamometer. Active
braking action through the ESP ®
may oth-
erwise seriously damage the brake sys-
tem which is not covered by the smart
Limited Warranty.
i The ESP ®
will only function properly if
you use wheels of the recommended tire
size (Y page 216). Hydraulic brake assistant
The hydraulic brake assistant operates in
emergency situations. If you apply the
brakes very quickly, the hydraulic brake Driving safety systems
47>> Safety. Z

assistant automatically provides full
brake boost, thereby potentially reducing
the braking distance.
X Apply continuous full braking pressure
until the emergency braking situation is
over.
The ABS will prevent the wheels from
locking.
When you release the brake pedal, the
brakes function again as normal. The
hydraulic brake assistant is then deacti-
vated. G
WARNING
When the hydraulic brake assistant is mal-
functioning, the brake system is still func- tioning normally, but without the addi-
tional brake boost that would normally be
provided during an emergency braking
maneuver. Therefore, the braking distance
may increase. G
WARNING
The hydraulic brake assistant cannot pre-
vent the natural laws of physics from acting on the vehicle, nor can it increase braking
efficiency beyond that afforded by the con-
dition of the vehicle brakes and tires or the traction afforded. The hydraulic brake
assistant cannot prevent accidents,
including those resulting from excessive
speed in turns, following another vehicle
too closely, or hydroplaning. Only a safe,
attentive, and skillful driver can prevent
accidents. The capabilities of a hydraulic
brake assistant equipped vehicle must
never be exploited in a reckless or dan-
gerous manner which could jeopardize the
user’s safety or the safety of others. Activating the hazard warning flasher
after an emergency braking maneuver
If you bring the vehicle to a complete stop
by strongly braking at a speed of more than
43 mph (70 km/h), the hazard warning
flasher comes on automatically as soon as the vehicle is at a standstill. The hazard
warning flasher will remain on until it is
switched off using the hazard warning
flasher switch (Y
page 68) or until the
speed of the vehicle has exceeded 6 mph
(10 km/h). Acoustic Vehicle Indication*
Vehicles with electric motors develop con-
siderably lower driving noises than vehi-
cles with combustion engines. Therefore
your vehicle in traffic might not be acous-
tically noticed by other road users in cer- tain situations.
In order to avoid this, a built-in sound
generator emits a certain noise (Acoustic
Vehicle Indication) within a speed range
between 0 to 20 mph (30 km/h). Thus, other
road users, especially pedestrians and
bicycle riders can notice your vehicle bet-
ter. Acoustic Vehicle Indication can also
be heard inside of the vehicle.
The volume of Acoustic Vehicle Indication depends on the current engine speed (rpm).The stronger you accelerate, the louder thenoise. At speed of more than 20 mph 30 km/h
the noise is switched off. From this speed
on the natural noises of the vehicle are
sufficient so that other road users can
notice the vehicle on time. Anti-theft systems
Electronic immobilizer
The electronic immobilizer prevents
unauthorized persons from starting your
vehicle.
When leaving the vehicle, always take the
key with you and lock the vehicle. The drive
system can be switched on by anyone with a
key that is left inside the vehicle. 48
Anti-theft systems>> Safety.
* optional