40 in the first sheet 4 the front part 141 of the first piston element 13 passes through the channel 11 in the movable carriage 1 the opening 51 in the second sheet and through the opening 41 in the first sheet 4 in order to get into the setting according to fig8 alternative 2 the front part 131 of the first piston element 13 is pulled out of the openings 41 51 via the bowden cable 19 by means of a lever mechanism cf fig1 in order to further get into the setting according to fig7 alternative 1 additionally the front part 141 of the second piston element 14 is pulled out of the slot 40 and the opening 50 via the bowden cable 19 in fig1 finally the inventive lever mechanism is shown the latter consists of a housing 30 a lever 31 with a push button 32 and a latching rail 33 having three latching stages 35 a 35 b and 35 c beside the latching rail 33 there is arranged onto the housing 30 a scale 34 which shows the weight ranges below 80 kg between 80 and 97 kg as well as above 97 kg which correspond with three latching stages 35 a 35 b and 35 c by means of the lever 31 and the push button 32 the bowden cable 19 which runs in the covering 36 to the first piston element 13 where it is anchored may be actuated via a common mechanics since the inventive energy absorption system is regularly.