Length changing member with piezoelectric actuator and vehicle with ABS braking system

The invention relates to a length-change element (20) comprising a piezoelectric actuator (23) with an actuator base (24) and an actuator head (25), a first end region (21) and a second end portion (22), said first end portion (21) with the actuator head (25) and the second end region (22) to the actuator base (24) is connected, and at least a first link (26) connecting the first end portion (21) with the second end portion (22).