A system for determining a position of a living being in a vehicle interior includes at least three components, each component of a first type or a second type, one of the first or second type being a transmitter and the other a receiver. Two components are of the first type and one component is of the second type. Each component is adapted to transmit or receive a signal dependent on type. The signal is adapted for determining a presence of the living being and for determining a distance (d1, d2) between the living being and each component of the first type. The components have active sectors adapted to at least partly overlap within the vehicle interior. The components of the first type are located at different positions known relative to each other. The system is adapted to determine the living being position based on the determined distances (d1, d2).