From the Website
Experience in the Polish and French campaigns had convinced the German high command of the value of fast-moving, armed reconnaissance vehicles. But it was realised that many of the early designs were too lightly-armed and development of a heavy eight-wheeled prototype resulted in the Sdkfz 234 series of armoured cars, the first of which entered service in late 1943. Built by the firm of Büssing-NAG, these sturdy and reliable vehicles were gradually up-armed and served in the infantry support role and eventually as tank killers, largely as the result of Hitler's desperation to arm as many vehicles as possible with anti-tank weapons.