Info for others coming along later... :-s All of this information comes from various threads on this fantastic forum, however 'SDS' is too short a search term which makes it very hard to find the information so I thought a post with the full term in the title might make it easier for other noobs like me in future... #-o If I have made any errors in the process, please let me know and I will edit this post. I only want to help, not mislead! :? Enabling the Speech Dialogue System (SDS) I have just got SDS working in my A4. I downloaded the update CD (from here) burnt it to a CD-R (ISO-9660) and finalised the disc. The update took some time and appeared to have hung but it eventually went on and when it finished I had the SDS menu options. I then recoded the Bluetooth module (from 1xxxx to 1xx0x) and after that pressing the PTT gave me a beep, then after 10 seconds or so the woman would give a list of commands, so I knew it was all working I just needed to rewire the microphone. I had a couple of spare repair wires (000-979-009) which I put in to the following positions: And then used Scotchbloks to tap in to the Microphone wires. Anyway, after I had the mic wired in, everything worked fine and as it should. In fact the microphone quality seems to have improved slightly but maybe that is down to too many beers after the install?! Many, many thanks to all the kind people who post to this forum as they have helped me to install options which would have cost close to Â£3000 from Audi for approx. Â£650. Regards, fM NOTES: I couldn't recode the BT immediately (because my laptop needed rebuilding) and after flashing the SDS firmware I got some strange behaviour which disapeared when the BT was coded properly. Basically until the BT was coded the RNS-E started complaining that the navigation disc was incompatible. Resetting the unit (hold Radio + Setup for ~6 seconds) and removing the disc showed the map, but as soon as I tried to set a destination it would hang. Other people who hadn't recoded the Bluetooth module stated that the DIS displayed Speak and then immediatley afterwards Phone. Perhaps they didn't try using navigation? Anyway, the brown trouser moment lasted until I coded the BT unit, whereupon all of the problems disappeared. To check if everything is working prior to pulling the unit and rewiring the mic, pressing the PTT should give a beep, then after 10 seconds or so the woman will say "Pardon?" and then after another 10 seconds or so a list of possible commands. My experience suggests that if you don't like SDS you will have to 'downgrade' to the non SDS firmware and then recode your BT back as the two cannot co-exist, even if the mic is disconnected from the RNS-E. Whilst I had the glovebox out I also added the AC vent for the glovebox and wired in the washer bottle sensor for my DIS retrofit but thats another story!