Arnold Betrays Iggy / Helga and the Nanny - S3-E10
Other mistake: Helga and the Nanny: Near the start, in the shot where Bob leaves the kitchen to answer the door, watch as Helga's mouth opens and closes with no animation whatsoever. (00:12:27)
Arnold Betrays Iggy / Helga and the Nanny - S3-E10
Other mistake: Helga and the Nanny: At the start, Miriam's dress is its usual purple colour, but when Inge arrives and walks into the kitchen, her dress is mistakenly coloured green. Her dress changes back to purple when she is shown again. (00:12:40)
Answer: The show is based in present day times. Plus most cars aren't old fashtioned, I recall seeing a limo and not to mention a cherry picker, etc.