RNS-E decoding CD
 

Found this on the net might be use-full to somebody. Have not tried myself since I do not have RNS-E so cannot give any guarantees, use at own risk. You need to burn disk image to CD, insert in RNS-E, restart and you will see numbers, last 4 digits are code. Works up to 2010 units. Should save a booking and trip to dealers

RNs e unlocking cd
 

Have done this myself and does work....anyone need the software let me know....supposedly can be only used once on a system don't know why....but is very useful when you dont have the code.