Gunther Wiesenthal first started buying and selling Mercedes Benz cars in 1920.

In 1932 he was appointed sales manager for the German Company in Austria and later he was promoted to head of exports in Stuttgart.

After the end of the Second World War, in 1955, he founded the headquarters of Mercedes Benz in Salzburg.
After his early death, his daughter Susanne Sulke-Wiesenthal and Patrick Graf Douglas continued to grow the prestigious collection and to add new acquisitions to the collection of rare historical models of Mercedes since 1970, including the 600 Pullman, the most expensive car in the world.

The collection also includes the prototype of the famous "Seagull Wings" coupé. Until their deaths, Susanne and Patrick continued to grow the collection and today it offers 13 of perfectly restored, the most important and luxurious models of Mercedes Benz. Here is the list:

1952 Mercedes-Benz 300 S Roadster
1954 Mercedes-Benz 300 b Cabriolet D
1954 Mercedes-Benz 220 Cabriolet A
1955 Mercedes-Benz 300 SL Coupé
1957 Mercedes-Benz 300 SL Roadster
1957 Mercedes-Benz 220 S Cabriolet
1958 Mercedes-Benz 220 SE Coupé
1964 Mercedes-Benz 600 Pullman
1965 Mercedes-Benz 230 SL
1970 Mercedes-Benz 280 SE 3.5 Cabriolet
1977 Mercedes-Benz 450 SLC
1979 Mercedes-Benz 450 SEL 6.9
1986 Mercedes-Benz 560 SEL