The stabiliser

The principle:
If the vehicle is raised or drops on only one side, the stabiliser comes into its own and transfers the movement from one side to the other. The static and dynamic forces acting on the one side are therefore distributed automatically over both sides, thereby suppressing the lateral inclination (tilt) and assisting in keeping the vehicle level - "like a board on the road - no more imbalance".
A rear axle stabilizer is at its most effective when the back of the stabilizer is behind the rear axle and the struts are secured as far back and to the sides of the body as possible. 

This results in the following characteristics:

Greater safety at the same speed, because the lateral inclination (tilt) is considerably countered when cornering. (See Promobil test photographs below) 

without stabiliser    with stabiliser