Abstract: A motorhome with a superstructure, the superstructure having at least one room extension module which is displaceably attached to it, and a seal which is arranged between the superstructure and the room extension module, at least one force transmission means being arranged in the area of the seal on the superstructure and/or on the room extension module, which means is configured in such a way that it narrowly limits a vertical relative movement between the superstructure and the room extension module by transmitting forces acting in the vertical direction between the room extension module and the superstructure. The force transmission means can be designed as a pin or also as a rail with a carriage guided displaceably therein.