I think there are 3 bolts to remove to take out the top trims.
Prise up the sensor, and unclip the wire.
Prise up the top grill.
You will then have one torx screw to remove.
This will then let you remove large black plastic trim with the vent diverter on.
Then I think there are 2 torx screws to remove.
Then you can remove the large trim with the 2 vents.
You do this by pulling up and towards you.
You do this at your own risk***
I've never had a problem, and if you need me to do a quick video at lunch time u will.
I can do it in my sleep now.