My local scrappy has an RNS-E (193) which I believe is the latest version removed from a vehicle (but they do not know which one nor have the code!) Is this too risky to purchase or can it be unlocked? Also if I want the basic functions for the time being do I just need the wiring adapter and aerial adapter? How do I go about coding it to work? My car is a 2007 S-Line with MFSW and double din unit.