The mindestens6min1.challenge.gbx file you have requested: Maps Levels Missions / Tracks / Bay / Rtseln!!! - 5.45kb is not available. Perhaps try browsing all files for the game TrackMania: Sunrise and upload any files you want to share or are missing. This is the only information we could locate:
Here's one for all the demo users out there. Prepare for a nice long ride.