Only episode of the series in which Josef Matula (Claus Theo Gärtner) still works as a cop.
The car driven by Josef Matula is a white 1974 Alfa Romeo Giulia Nuova Super. It was Claus Theo Gärtner's own vehicle and was used until season 4, after that the character drives Audi midsize sedans, before going back to Alfa Romeo cars in season 8.