Revealing mistake: When the bus is being pursued, Smith steers it to trip several prepositioned explosives that blow up trees to block the road. In order to by pass a downed tree the Germans push a motorcycle around it, and you can plainly see that the tree was cut by a chainsaw. (02:18:40)
Other mistake: Just before the Charger crashes, a tow bar connecting both vehicles is visible on the Mustang's front bumper.