Just watched a clip on YouTube driving the Stelvio pass in Italy and thinking that would be a great road trip, the drive there and then the driving the pass in a Zed would be fantastic !!
I'm a thinking that's got to go on my bucket list !!
View: http://youtu.be/V9TeRxEbcMk
I was also excited by Top Gear to drive Stelvio to Davos and Maurice is right: the passes you will drive on the way to Stelvio from Austria or from Italy (from Milano you can drive about 10 fabulous Pass!) are even more spectacular! With the open Z it's something that you wish will never end......
An important tip: make the schedule in such way that you start "climbing" arround 18.00 hours and better to have accomodation in one of the hotels in Stelvio; the road will be almost empty (in the middle of the day there are motorcycles, bikes and other cars....) and you will have the sunset panorama!
Stelvio is a must for every Z3!
I will try to come back with a detailed description and pics, one of these winter days.