Just thought I'd post a quick thank you for this. It's an excellent guide and I've managed to replace the driver's side dip beam bulb on my
A4 cabrio. There's one small change in instructions for the cabrio, which is that there is only one retaining bolt at the rear of the light unit (I didn't spend too long searching for the other one!).
I had to tease the fittings at the top of the light unit away from the bodywork as they were being held in place by the reinforcing plates around the bolt holes. It's also hard to remove the light unit completely, but with the air intake duct removed, it's possible to replace the bulb in situ.
Still, great guide. Thanks!