It comprises two front adaptive airbags [front airbag] (the passenger airbag can be deactivated) with an internal unit which cools the gas before venting, a double pretensioner for the driver (a single pretensioner for the passenger) and load limiters in the form of 400kg calibrated torsion bars in the belt reels. In Vel Satis, the front safety belt reels are also fitted with an electrical control which operates even if the battery has become disconnected during impact - locking occurs whenever the current is cut off - and the system is completed by close-contact head restraints. Those at each side are provided with a torsion bar type load limiter and a pyrotechnic pretensioner. The three rear headrests may be slid down when not in use, for improving visibility.