Thats no Moon, Thats a space station!
I did a DIS retrofit on an A4 B6 and if its similar to ours the stalk is basically I mini module of its own. I would guess either faulty connection or just that the stalk itself is not happy. If you can acquire a cheap second hand stalk I would just swap it out as it shouldn't be too hard its just a case of removing the wheel piece by piece till you can access the stalk.
Audi S3 8L BAM 225 2002 - Ming Blue : Silver Heated Leather, Armrest, RNS-E & Bose, Alloy Mirrors, Gunmetal 18" RSTT`s, Sunroof, Cruise, AutoDim Mirror & usual S3 extras.
Mods : Revo Stg 2 & Select+, FMIC, 3" DP & 200 Cell Cat, 007P (New Piston), Jetex Filter & 80mm TIP & Heatshield, LED Sides & Fogs, Gen VW Aero Wipers, Full Powerflex Kit, Lowered on AP Shocks & Springs, 15mm Front & 20mm Rear Spacers, N249 Delete & Catch Can, AP TVR 4Pot Brakes & DS2500`s, Sachs DMF & Carbon/Kevlar Clutch