dhs9

My s-class has ESP and a switch next to it with a car on it and a up arrow. The switch has two lights on it. When I push the switch top both lights come on and the car raises. The manual talks about two levels of raising but I cant get one light to come on and then the other. Both always come on at the same time and the car goes up. Is this normal or should the car raise one level with one light and then level 2 and the second light comes on

Thanks