SMART fortwo coupe Operator's Manual page 42

Occupant safety
40
force limiters, based on the classified
occupant weight category determined by
weight sensor readings from the
passenger seat.
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
leaning 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 smart
center. Only seat accessories approved
by smart may be used.
Both driver and the passenger should
always use the 40 indicator
lamp as an indication of whether or not
the passenger is properly positioned
Y
( page 42).
G
Warning!
If the 40 indicator lamp
illuminates when an adult or someone
larger than a small individual is in the
passenger seat, have the passenger re-
position himself or herself in the seat
until the 40 indicator lamp
goes out.
In the event of a collision, the air bag
control unit will not allow passenger front
air bag deployment when the OCS 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 40 indicator
lamp will illuminate when the ignition is
switched on and remain illuminated,
indicating that the passenger front air bag
is deactivated.
When the OCS senses that the passenger seat
is classified as being empty, the
40 indicator lamp will
illuminate 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
40 indicator lamp will
illuminate for approximately 4 seconds
when the ignition is switched on and then,
depending on occupant weight sensor
readings from the seat, remains
illuminated or goes out.
When the 40 indicator lamp is
illuminated, the passenger front air bag is
deactivated.
When the 40 indicator lamp is
out and the passenger seat is occupied by
an adult or someone larger than a small
individual, the passenger front air bag is
activated.
When the OCS senses that the passenger seat
occupant is classified as an adult or
someone larger than a small individual, the
40 indicator lamp will
illuminate 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 40 indicator lamp is
illuminated, the passenger front air bag is
deactivated and will not be deployed.