When the Russians roll their car, they get out and one of them says "They broke my watch!" in Russian. This is in reference to a running gag in the first Blues Brothers movie, where a cop is heard complaining that "They broke my watch!" after every major pile-up, beginning with the cop roll and slide in the mall chase.
When Elwood meets Cab for the first time and tells him about Curtis, Cab says that his mother lives in Phoenix, Arizona and then calls her. He is in Chicago and only dials 7 numbers when he needed an area code.