The subject Opel Manta in the film has on a full Mattig Extrem widebody kit (including steel wheels). Of the 3 cars built by Kissling Motorsport for the film, one of them was destroyed during filming.
Both "Manta, Manta" as well as "Manta - Der Film (1991)" were cash-ins on the then-popular "Opel Manta"-jokes.