Hey, how can i delete a posted Status in my friend feed? is it possible?

Nope, sorry. Not as far as I know. You can set it not to show in future I think but I don't think it's retroactive.

Like said, you can set what shows or not in the privacy options of the feed page, but it's not retroactive. It won't change what you already posted/did.

ah, okay ..... now i found it :3 thank you! :)