partially dismantle radiator grill (9-3 convertible)

Moin, I want, or don’t have to open the bonnet anymore, remove parts from the radiator grill. It’s the two small parts next to the central grill. I started a photo of it. On a video I saw that these parts are to be dismantled from the outside. Should only be clicked. Can you give me tips, how I can dismantle the parts “damage-free” and would be nice also a tip, with which tool. Also with PN, if here in the forum too “dangerous” for use by Langfinger 🙂 I am looking forward to a lively participation. Greeting Ronald