With 8.8 million moviegoers, this was the most successful film in Germany in 2012 (beating the likes of Skyfall (2012), Ice Age: Continental Drift (2012) and The Twilight Saga: Breaking Dawn - Part 2 (2012). It is the most successful French film in German cinema history.
There are two different Maseratis used in the film. In the opening scene, there is a different car used for the fast part of the car chase - notably a Quattroporte GTS 4.2 that can be identified by a chrome mesh grill and four exhausts. At the part where they are stopped by the police, a different front grill can be seen with vertical segments, and when they drive off two large exhausts are visible. It is one of the 4.7 versions of the Quatroporte. The 4.7 version of the car is again shown when later Driss gets in the car for the first time.
When Driss is getting ready to leave the mansion after Phillipe fires him he is seen putting the baby monitor around his neck. In the next scene the monitor is gone, and when we see him next in the foyer it's around his neck again.
In short scene where tailors are measuring Driss for new suit, Philippe and Driss exchange few words while Philippes both feet (or legs) are moving shortly up and down even tho' he is quadriplegic.