<p align="justify">Having shown much promise in Hermann Holbein's beautifully constructed HH single-seater in 1948, Riess then switched to AFM and in 1950 he enjoyed some fine tussles with Ulmen's Veritas-Meteor, winning the Eifelrennen and finishing second to Ulmen at Sachsenring. He continued with the team the following year, winning at the Riem airfield circuit and then taking second place behind Pietsch in the Eifelrennen, before successfully joining the ranks of the Veritas runners in 1952 with his two-seater sports model.
Invited by Mercedes to join their team for Le Mans, Riess shared the winning 300SL with Lang and then finished third in the Prix de Berne at Bremgarten. He raced infrequently from 1953 onwards but was still active in 1957, when he took a class win in the Nurburgring 1000 Km, again in a Mercedes-Benz 300SL.
(c) 'Who is Who' by Steve Small, 2000