I dont agree, 'whips' was introduced -00 on S/V70, possible somewhat earlier on S80. It is a give away feature in the backrest inteded to reduce forces on the neck at a rear impact. Sips "side impact protection system" is old though, it came already on the 700-series. It is a mechanical reinforcement in the doors, seats and centre console to reduce deformation in a side collision. Then we have the side airbags which is different story..