hello, i have a4 b7 and bought new rns-e led from 2011, a had old rns-e before, and it was work perfect. i install new rns-e and plug all wires from old one. and i have a big problem with coding. i have: bluetooth multi steering wheel rear camera non bose my coding are: 0301715, original from a3: 0205725, in original coding i haven't info on dis and it was turn off, after 30 minutes but, when i do new coding for a4, and turn on ignition, screen on rnse are black and i have only info on dis, when i turn off ignition, info on screen rns-e appears. with old coding for a3 this is not happening. can anybody help me with correct coding for my audi, i really don't know, what to do.