55 years ago: 1955 7 April: Daimler-Benz of North America, Inc. was founded in the US state of Delaware, purely as a vehicle importing company.

35 years ago: 1975 7 April: In Esslingen, Daimler-Benz unveiled a test bus for combined battery/overhead cable operation. The DUO-Bus was based on the OE 302, and line service trials started the same day.