Had already searched in different forums for information regarding pairing headset and nav, unfortunately zero tips. Try again, should give a speci, which has a solution. So again, have Navi from Medion incl. Bluettoth (BT). Now I also use a headset from Scala Rider. The BT connection to Garmin and TomTom works with colleagues. Only the BT connection from my Medion Navi to Scala Rider Headset does not work. I am not a technician or software expert. But purely from the logic, the technique of the navigator (sends and receives also via BT mobile phone calls, which works) should be present in order to establish a connection to the headset. Is it due to the software, I have to transfer if necessary a specific file to the Medion Navi ??? Have found that on the navig is a folder, in which every number of cell phone types are listed. Must there possibly a file of the ScalaRider pure ? Do TomTom or Garmin have this file ? Can I overplay it if necessary I’d be happy if someone here had a solution.