In Episode 4 of the Family Stories series, Johanna und Jochen im Liebesglück (Johanna and Johcen in Love Happiness), newly-engaged couple Johanna and Jochen (who both have Trisomie 21 syndrome) visited Benny in Stockholm on their first holiday trip.  Stockhom was chosen as the destination for their first trip due to Johanna's love of ABBA.

They met Benny in his office and sang Super Trouper with new, German lyrics for him and he was playing along on the piano. He was touched and invited them into the coffee shop in his Hotel Rival.

Thanks to Erik Menkens