S&B
1. Not as far as i know
2. EU law dictates that all insurers cover 'green card' insurance - but you do have to inform your insurer of the proposed dates otherwise you may not be covered. Not sure about trips >30 days.
3. Yes - BMW network, but CSL bits can always come with a delay from Germany
4. Italy has a road toll system in place rather than RFL. As long as your UK road tax is in date there are no issues. Switzerland/Austria do have a system where you have to buy a 'Vignetta' tax sticker and display it on your windscreen. The police do spot checks...
5. My BMW Warranty did cover European runs. I will now use ADAC for trips to Germany but not sure if that would cover Italy?
6. There are some awesome routes you can take in. I did a few last year just as the Top Gear chimps did - Davos, Swiss Alps, Stelvio Pass, etc. Thread in the Photos section.
7. I will certainly be around that way in August for a week or two.
The CSL does stuff like this with ease and is a joy to do! Get up onto Stelvio!!
Hope this helps - Rob.