Well I've just tested the newly released software hack for the RNS-E to enable speech control. If you have a Multi Function Steering Wheel and and RNS-E with or without the telephone kit, you can control your NAV/radio/CD etc.
You would need a mic for the any system without a phone kit and a rewire for those people with phone preps.
You would need a mic for the any system without a phone kit and a rewire for those people with phone preps.