Not sure if people has more issues with the nagging screen showing up (emergency brake wired incorrectly) mine showed 1 time only. While I was adding a relay/capacitor to my HU to avoid restarting my HU when I start my car, I took a picture what i did with the wire, I grounded this wire and the parking brake together, make sure you ground it on a bare metal of the car... Hope this help...
http://i1126.photobucket.com/albums/l612/ntm1028/7_zps5463807a.jpg
http://i1126.photobucket.com/albums/l612/ntm1028/4-1_zps608904b9.jpg
relay/cap switch
http://i1126.photobucket.com/albums/l612/ntm1