http://www.grolier.com/wwii/wwii_6.html

The German Army High Command (Oberkommando des Heeres or OKH) assigned 148 divisions, including 19 panzer divisions, to the invasion of the USSR. Total personnel strength was 3,050,000 men. Initially the armies had 3,350 tanks, 7,184 artillery pieces, 600,000 motor vehicles, and 625,000 horses, and the Luftwaffe provided 2,500 aircraft of all types. The Finnish Army added 500,000 men, and Romania furnished 14 divisions or about 250,000 men. After the invasion started, Hungary, Italy, and the puppet state of Slovakia also furnished contingents of troops. An additional 5 German divisions under the direct control of the High Command of the Armed Forces (Oberkommando der Wehrmacht or OKW)

600.000 motor vehicles. is that correct?