Kammala jumla mai zuwa: Ertl yana da gemu mai kama da 'Imperial' da kuma cikakken gemu. Ya yi aiki a hanyarsa ta hanyar Jamus Formula Vee da Super Vee, sannan kuma zuwa Formula Three, kafin ya samu nasarar sauyawa zuwa Touring Cars. A wannan lokacin, ya sami isasshen tallafi don shiga Formula One, inda ya tuka tare da kayan aiki daban-daban tsakanin 1975 da 1980. Ertl na daya daga cikin direbobi hudu da suka taimaka wajen fitar da Niki Lauda daga motar Ferrari mai cin wuta a cikin
Babban kyautar Jamus ta 1976.