Curtain airbag system
The curtain airbags are contained in the front and rear pillars and roof side rail. The curtain airbag is designed to inflate only on the side of the vehicle that is impacted, even with no passenger in the front seat or rear seat.

See also:
ECO mode indicator (for vehicles equipped with CVT or Twin clutch SST)
Except for vehicles for Russia, Kazakhstan and Ukraine, this indicator will be
displayed when fuel-efficient driving is achieved. ...
Mitsubishi Carisma Owner's Manual
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