I've just changed the A3's interior lamp to the Ambient / map reading lamp and all went well, well apart from one of the screws making a run for it and I spent 10mins looking under the seats to trying to find it again!
Anyway, my car doesn't have the MFSW (something I'll look at changing later) and when I've tried to connect my phone, Bluetooth has never been found. Now when I've taken the old interior lamp out I found the microphones are fitted and the wiring loom is all connected up to them. So I don't know if its all there and not switched on or if only part of it is or where the Bluetooth module should be if it is there.
My car, which is a 59 plate, does seem to throw up more questions the more I look into things with it. The dealer says its on the end of the chassis run before they switched to the 2010 model so has a mixture of the two.