I want to install a remote starter on my '13 Limited, but I wasn't sure whether the bi-directional remote starter needs the Ford Perimeter Plus system that's listed on the site (or either of the listed security systems, for that matter). Would I be able to just get the remote start system? I don't mind going to the dealership and having them put it in, but I don't really care about Perimeter Plus. Though my Edge has a standard key, does the Bi-Directional system require keyless entry to function? Or would I need to go with the plug n play version?