I have been trying to re-code my new RNS-E system to match the equipment loaded into the car. The car is a B6 S4 2005. Everytime I try to recode the unit, it always goes back to the orginal code it was programmed with. It also spits out a module code incorrectly fault. Is there a login code I must use. The unit is working great besides the incorrect code fault. The instrument (17) module was coded correctly and is displaying the Nav signal correctly. TIA.