These steps make it easy to climb into expedition vehicles. Just like the vehicles themselves, they have to be sturdy, tough and wear-free. The steps presented here can be extended and retracted by electric drive. The reliable and almost silent folding movement is guaranteed by drylin® trapezoidal thread spindles and igubal® spherical caps among other elements. Dust, water and large fluctuations in temperature have no effect whatsoever on the igus® products. They remain functional and maintenance-free at all times.