That would be me...
http://forum.a8parts.co.uk/showthread.php?t=13812
I love mine, its been brilliant to drive, I've had two S4's on the B6 platform and this B7 platform cabriolet, I also had the earlier 80 based cabriolet.
I have the 3.0 TDI engine, its perfect, roof down no issues with noise as you get the wind sound anyway and the exhaust sound waves are taken away a lot while you move forward anyway. Its surprisingly refined with the roof up, only the S4 and the 3.0 TDI have the acoustic fabric roof, seriously, its like a saloon with the roof up, not S8 quiet, but very good.
I get about 40-44mpg on a sensible run using 70-85mph as a guide. I've had it remapped and the difference is night and day, I would 100% recommend the remap.
Things to look out for:
- leaky rear lights
- leaky 3rd brake light
- make sure RNS-E works
- auto is best in any cab, 3.0 TDI is all auto
- like the A8, glow plugs can have issues, ditto swirl pots
- 2006 model is pre-tax hike, so £305 a year
- check for rust, rattles and suspension creak as they are heavy cars
- make sure the roof works, dont buy it in the rain!
- the Genuine Audi deflector is better than aftermarket because it folds up into a case in the boot.
- Bose is best, comes default on all S-line, which is the best pick spec wise too with cruise, etc..
A good service history will help retain values, its very easy to work on yourself though.
I'd wholeheartedly recommend a 3.0 TDI quattro with a remap