Here's an excerpt:
Jellinek was quite a character. He used to pepper DMG’s engineers with colorful suggestions and criticism such as "Your manure wagon has just broken down on schedule" and "You are all donkeys". However, as he actually sold a lot of cars, he was tolerated and even listened to. Later, Jellinek would add Mercedes to his own and became Emil Jellinek-Mercedes.
Link:
Evolution of Car Logos
