No, that doesn't exist anymore. (it also had gotten more expensive over the years, and only was for the full weekend until 2000 or so, only one day after that)
The closest is now the "Quer-durchs-Land" (~"across the country") ticket which is available for any day of the week and currently costs 44€ for the first person and 7€ each for up to 4 more people travelling on it.
The closest is now the "Quer-durchs-Land" (~"across the country") ticket which is available for any day of the week and currently costs 44€ for the first person and 7€ each for up to 4 more people travelling on it.