The taxi panel has one weak moment. When Korben has the taxi in hiding from the police, he wants to lower the taxi shield to check on Leeloo. To lower the shield, he presses on the “DOCKING LOCK” button on the panel, which doesn’t quite make sense. We saw this button used earlier to actually do what it says. Why does its function change now?
It might be that the button has two modes, i.e. in a garage it anchors the vehicle and elsewhere it lowers the shield. Modal buttons aren’t great. What if Korben is in the garage and needs to lower the shield? Just say no to modal buttons. If the functions can be operated independently, they should have separate buttons.
Additionally, if it’s going to have to be modal and have a secondary function, it should be labeled as such. Even if the shield was aftermarket, the installing mechanic could have taken a sharpie to the button to note which of the dozens of buttons on the dashboard is the one that activates it. Mechanics, you now have no excuse.
Of course leaving behind my New Criticism stance on authorial intent, it’s entirely possible that Willis just pressed the wrong button, or that the prop he was faced with on set didn’t have a button that worked, and he just picked one at hand. But I like Willis, and I like not having to second guess film makers, so I’m going to cut him some slack for this detail that most probably, nobody but me ever noticed. Until, you know, now.