1999 Lexus LS 400 Owners Manual - Page 168

COMFORT ADJUSTMENT "Driver and front passenger airbags, and seat belt pretensioners Driver and front passenger airbags: In response to a severe frontal impact, the driver and front passenger airbags work together with the seat belts to help preventing or reduce injury by inflating, in order to decrease the likelihood of the driver's or front passenger's heads or chests from directly hitting the steering wheel or dashboard. Seat belt pretensioners: In response to a severe frontal impact, the seat belts are quickly drawn back in by the retractors so that the belts snugly restrain the driver and front passenger. The front passenger airbag is activated even with no passenger in the front seat. The seat belt pretensioners are activated even with no passenger in the front seat. Be sure to wear your seat belt. 152