Hi, you might still have the old system, i.e. you have to remove the grey caps on both sides, then the mechanism will become visible. And now it gets fun, if you look closely at the whole thing, you will see a Phillips screw hidden under a metal piece. You have to insert a screwdriver into it... this part that slightly covers the screw can then be pushed upwards (with the screwdriver). You will notice that it has some spring play upwards and then the front should come loose. I don’t really know if this description is practical, but maybe it helps you, or someone else can describe it better. Anyway, I’m keeping my fingers crossed for you!