Roof extension for a motor vehicle

This application claims the priority of 199 09 141.2, filed Mar. 3, 1999, the disclosure of which is expressly incorporated by reference herein. A roof extension for a motor vehicle has at least two roof members which are mounted by way of fastening devices on the vehicle roof. Guide rails are arranged approximately parallel to one another, along which a ladder can be displaced from a starting position into a transport position on the vehicle roof and can be fixed in its end position. For the sliding guidance at least on one end of the ladder, laterally projecting guiding devices are arranged, and the ladder, after the fixing is eliminated, can be displaced back into the starting position. The guide rails extend close to the fastening points of the roof members, the guiding devices being held by laterally projecting extension arms of the ladder.