I could've had a look before I got rid of my sprinter, but the celica has two metal clips and hook holding it in place.
They are a bitch to try and get off without breaking it. If the sprinter is like the celica which I think it is, don't quote me on it, and correct me if I'm wrong.
The two metal clips are on the top and middle of the colum, you need to wiggle them a fair bit to get it loose and they should pop out, start from the top and then the middle, once you have the clips out and you haven't broken the plastic hook at the bottom the trim should lift up and out.