Ah, that bit.
First thing, take out all the screws. Three above the fan/temp/aircon controls, note the middle one is longer.
5 across the top (Upside down).
2 above steering wheel column, and one or two to the right of that.
I'll suggest taking off the top of the steering column cover too. Otherwise it obstructs the airvents bit.
When all the screws are out, pull the left side (with the two airvents) out a bit. Then get a small flathead screwdriver, wedge it inbetween the downward curve (so between this panel and the big top one) near the single right-side airvent, and lever it, it should pop out.
Then you just gotta pull it out, a bit tricky to get the back of the airvents over things. Move it to the left, towards the passenger door.
And next time please try to tell everyone what you mean, if you had've said "The part with the airvents and clock" I would've known straight away what you were talking about.