When they are prepping Vastenov's Citroën for the road trip, the Russian winds up painting a combined symbol representing both Russia and Jerusalem. However, you can see this symbol already painted on the Citroën when the titular Rabbi is first checking out the vehicle in Vastenov's garage.
Sheik Mohammed Sfar's talking donkey disappears as they follow along the rabbi in his journey. He later reappears following the tank, than disappears again along the film.