In the German version, Hyde, Kelso and Fez refer to themselves as Colt, Howie and Jody respectively (referencing "The Fall Guy"). However, "The Fall Guy" premiered in November 1981, therefore the trio would not have known about the show in 1977.
In the german version Hyde, Kelso and Fez refer to themselves as Colt, Howie and Jody respectively (referencing "The Fall Guy", not "Twen-Police"). However, "The Fall Guy" was broadcast for the first time in November 1981. Therefore the Trio would not know about the show in 1977.