The 250/3 Grief was Rommels command vehicle, not sure if a figure of Rommel comes with it. A scene with Rommel visiting the front lines with the 251 near by would work. I ma guessing the 251 is the old Tamiya kit as you have called it a Hanomag.
As Stikpusher mentioned, the 250/9 was to late for Afruca, production began in May 1943.