Continuity mistake: After Slide locks Josh's boss in the master bedroom closet within Mr. Fitzhugh's ex-apartment, he turns on the boombox at a high volume. Then later in the film, when they are retrieving the car through the window of the same apartment, the music is off. Then later, Josh's boss is seen trying to get out of the closet and the music is back on.
Factual error: As an attorney, I know that one doesn't become an attorney three days after passing the Bar Exam in NY, as Miss Lovenko claims at the end of the movie. She first would have to be approved before the Character Committee, submit Letters of Recommendation of Good Character, and her background would have to be checked. If approved, she would have to wait be sworn in by an Appellate Division Judge, which is about a 6 month process, not 3 days.
Factual error: At the end, one of the tower employees receives a gold wheel as his/her portion of the retirement program. As malleable as gold is, it is unlikely that the gold spokes in that wheel would support the car, and just gold plating wouldn't be that heavy.
Plot hole: Leaving aside the absurdity of a full sized car in a penthouse with no means of entry or exit other than taking out the window, the car is a very obvious plot device. Mr. Shaw has swindled $2B and once he is convicted all of this possessions will be sold off. That car sold in 2010 for about $500,000 so it would be one of the first things sold making it a terrible place to hide the missing loot AND the ledger that finally convicts him for life. Even if he gets off on the charges good luck explaining to the FBI who are watching him like a hawk what happened to the car once he decides to melt it down.