[Karacticus]

If you're talking the plastic cover over the radiator, my recollection is that it's pretty straightforward.

There's the two torx machine screws, one on each side, and then unscrew/pop out the plastic expanding rivets around the perimeter. It's probably a good idea to pick up a replacement set of the latter, as the heads/fasteners may strip out while unscrewing them, or they just break.

You'll probably want to back off the big torx inserts that hold the radiator in place before you re-install the cover, then snug them back up.

The expanding plastic fasteners will re-install easier and hopefully be better removable in the future if you put a (very small) dab of silicone grease on the threaded portion before inserting them.