Tools needed:
Torx screwdriver
Electrical tape
1. Open your bonnet and secure it in the upright position. Then find the black rubber weather strip at the back of the engine bay, under the windscreen. This will need to be completely removed, as below. I don't think it's fixed in place with anything other than years of engine heat.
2. Find the Torx screws located under each end of this weather strip and undo them both.
3. The metal part that these screws were holding in will now need to be lifted out.
Before you do that though, a word of advice: It will take quite some doing to remove this part, which has to be pulled toward you as it's removed. The plastic rain tray that is resting on top of this metal part will either need to be moved, or taken off. I chose to move it out of the way, but I also had my mate working one side while I did the other. The rain tray on my car wasn't brittle at all so can move and be bent a bit. The metal part really took some work to get out.
Taking off the rain tray [I think] requires removing the windscreen wipers and, given the absolute ball-ache I had a) getting this metal part out, and b) getting it back in and lined up with the rain tray enough for the weather strip to go back on, I think I would have removed the wipers, in hindsight. The weather strip now doesn't line exactly where it was before but, after a night of heavy rain, all appears to be dry under there. I may just take it all apart again this weekend to see if I get it to fit back properly.
Anyway, 2 pictures of metal bulkhead removed below:
4. The Soundaktor is the cylindrical item sitting under the rain tray with the connector sticking out of the left hand side and the white Audi label on the front:
5. To remove the connector, you need to pull the grey tab at the bottom of the connector in the opposite direction to the Soundaktor, and then unplug the thing:
6. What you do with it is completely up to you. I opted for the quick and dirty "tape it to something" method:
So, that's the fun part. Getting everything back again is a reversal of removal.
The metal part should go back first. This was a nightmare and, again, it was lucky my mate was there so we could work together. It needs to slot behind the top of the bulkhead so that the tabs that the Torx screws screwed into line back up with the holes (see 3rd picture from top). Don't forget that the rain tray sits on top of this metal part so you will need to move this out of the way to get the metal secured.
Once the metal part is in place, take the weather strip and slide it onto the lip of the metal and then over the lip of the rain tray. Work from one end to the other end.
I had a slight issue with where everything ended up - pictures below - but, after the drive home last night, a night of rain and the drive to work this morning, everything is dry and hasn't moved much, if at all.:
Some of you may be able to do all this without properly removing the metal part - that would be preferable to be honest!
Any questions, let me know.
Rich