Motor vehicle with an interior for forming domestic and/or sleeping accommodation

The motor vehicle has two modules, where each module has a functional module with functional components under a support surface. The support surfaces with the identical height are joined to form a seating- and sleeping area. A kitchen module (6) is formed with a sink and a stove, while a sanitary module (13) is formed with a western commode. A battery or a fuel cell is provided in the power module (18), and a cooling box is provided in a cooling module (15). The modules are fastened on a base plate that is fastened to a loading floor of the motor vehicle.