J Gutz, I tried this procedure and all others which I could find on Internet. Nothing helps. When I go into the language change menu, there is only one (German) language, and not possible to change it. It seems like there is no any more language installed into dashboard. I was wondering, maybe it was more language installed, but after reprogrmming the dashboard, left only one.
Ok, I will let you know, when I will upload data log file.