サファリラリー
After the World Rally Championship was established in 1973, Herrmann competed with his 240Z at the 1973 Safari Rally, retiring due to a broken head gasket, and with a Subaru GL at the 1973 Press-on-Regardless Rally, finishing in 14th place. However, he did win the non-WRC event Rallye Côte d'Ivoire that year. The following season, he took part in the Safari Rally in a Porsche Carrera RS but retired with an engine problem.