I'm not 100% sure if this is the same Mayfair as Dieter played in, but this single was made in 1976 in Germany. So, this is indeed the period when Dieter played with Mayfair. He played the drums when he was in this group. But I don't see his name on the record : Train of love was written by James Hopkins and Geofrrey Peacey.
Furthermore, I see on the record 'A Francis, Day & Hunter production by Peacey/Hopkins'.