12 the end regions of the respective legs of the light conductors are also arranged pair wise adjacent one another in the direction of extension of the contour in addition to the already mentioned coupling in elements 30 32 and 52 light is fed into the light conductors by further coupling elements 74 the example shows how the invention enables a circumferential illumination of a large surface area component here a sunroof without visible interruption four light conductors are used which are illuminated cross wise with light emitting diodes at the corners of the sunroof the corners of the sunroof section in the ceiling form the fixed bearings of the light conductors the floating bearings form the overlapping ends of the light conductors which allow compensation of tolerances the light conductors are made of customary light conducting material and extend in a circumferential scatter body the scatter body is held by a strip of the frame of the sunroof the scatter body includes the surface which is visible for the persons in the interior of the motor vehicle and can thus be mechanically decoupled from the ceiling only to a limited degree because no division is possible in the invention the material of the scattering body can be chosen so that it has a better thermal coefficient of expansion than the light conductor located inside the scattering body when the light conductors expand due to the heat they can move along the scattering body the coupling in elements can also be supported floatingly while the invention has been illustrated and described in.