Does Samsung Galaxy S2 Plus supports Miracast? Since Android 4.2 there should be support vor Miracast. Also the Samsung Galaxy S2 Plus has Wifi Direct. But I can't find any option.

Does Samsung Galasy S2 Plus supports Miracast? If yes, where can I find the option in the menu?
No, I don't believe the SGS2 Plus supports Miracast.  This feature comparison shows the other phone having it but not the S2.

However, from my understanding, since Wi-Fi Direct is supported it shouldn't be extremely hard for someone to get Miracast working on the device.  This has been done for the regular SGS2, though I do not completely understand those posts.