[2] Beierlein's career breakthrough came with the discovery of Udo Jürgens in 1963, whose subsequent win at the Eurovision Grand Prix in 1966 with "Merci Chérie" propelled him to stardom.
[3] The professional relationship between Jürgens and Beierlein ended in the late 1970s, leading to legal disputes, though they eventually reconciled 17 years later.
[3] Following the fall of the Berlin Wall, he managed the careers of several folk artists, including Stefanie Hertel, and worked with Stefan Mross and Florian Silbereisen.
[3] Beierlein also promoted French musicians like Charles Aznavour and Johnny Hallyday in German-speaking countries and was involved in trading football rights.
[3] After his death, Beierlein's ashes were interred by his adopted daughter, Bizzi Nießlein, in a cemetery in Schliersee, Upper Bavaria, where he owned a villa.