Hi, I have recently retrofitted an RNS-E in my 55 A4 DTM and am very impressed at how well it went and the performance of the unit. Having bought VCDS i noticed the following fault code: ddress 56: Radio Labels: 8E0-035-192-RNSE.lbl Part No SW: 8E0 035 192 T HW: 8E0 035 192 T Component: RNS-E HIGH EU H80 X--- Revision: 20S Serial number: AUZBZ7J8721554 Coding: 0301115 Shop #: WSC 43567 133 80223 VCID: 356B16425FB4CDB0C2A 1 Fault Found: 02454 - Microphone Unit (in Front Roof Module) (R164) 011 - Open Circuit Freeze Frame: Fault Status: 01101011 Fault Priority: 5 Fault Frequency: 75 Reset counter: 104 Time Indication: 0 Date: 2012.12.14 Time: 10:25:16 I dont remember seeing any notes in the how 2's that would deal with this item as i guess its looking for a microphone thats not fitted to my car. I'm also thinking that i either install the microphone or put some form of jumper in (unles i can turn the feature off in VCDS? So any ideas on how to get rid of the code? what have others done? Have searched a few threads i also get the impression that my RNS-E may have been modified due to the H80 X--- tag. i tried to downgrade the software version to re-install off of the 2010 disc that came with the unit. however with the disc in it doesnt autorun and i cannot find an update option on the menu's. Am i right in my assumptions above and any ideas on how to get back to version 650?