Corrected entry: The tanks used by the Germans are Russian; it's the T34.
Corrected entry: When Mariza shoots the German escort with her MP 40, there would have been an equal chance to hit the guys she was supposed to help; a weapon fired on full automatic would hardly miss any unintentional targets in a tight-knit group, no matter how good a shot you are.
Correction: If you watch closesly, you'll notice Harrison Ford and Robert Shaw are on their knees as they dig the hole, also Harrison Ford's character (Barnsby) rolls over onto his back and swing up at the guards with his shovel. While automatic weapons are hard to control, they start to kick upwards as they are fired. To hit either two characters as she traversed the group of guards who were standing, she would have had to make an effort to keep the barrel level, let alone in order to lower her point of aim while firing to hit the characters.
Correction: The Germans usually recalibrated captured Russian tanks or even used them as they were.