It’s goofy, but okay.
After the Fire’s 1982 cover of “Der Kommissar” is a bunch of English people singing about Germans (or maybe Austrians: Falco was Austrian.)
This is one of those weird songs with a catchy chorus that just earworms into your head.
Musically, the song is a repetitive guitar/keyboard piece. Nothing spectacular about it.
Lyrically, the song’s about prostitutes.
The reason “don’t turn around: der kommissar’s in town” is the chorus is literally because the police are watching you and your hooker. This song is about the band regularly hooking up with prostitutes, there’s no deep meaning here.
Is it a good song? It’s okay. Is it catchy? Of course it’s catchy.