Complex sentence: Sixt was founded in 1912 with three vehicles in downtown Munich, the vehicles he had were Deutz Landauler de Luxe and two Daimlers.
Split into simpler sentences: Sixt was founded in 1912 with three vehicles in downtown Munich. At the time of its launch it had only three cars: a Deutz Landauler de Luxe, and two Daimlers.