Other mistake: After Jason rams the man through the railing at the top of the stairs, he puts in a new clip. As he falls through the air, he shoots the other guard once. Then, he puts in a new clip when he rises after the fall. After one shot?
Other mistake: In the scene where Nicole is listening to the French police radio, all rack equipment to her right is from Behringer, which is about the cheapest and most unprofessional you can find. A no-budget-limit governmental assassination squad would not save the $300 and buy Behringer equipment. Period. Also, the bass synthesizer, echo/reverb effects and digital crossovers in the rack have nothing to do there in the first place. (01:08:05)
Answer: He taped the door edges so they wouldn't leave fingerprints on the car.