I done the stelvio and ring in june this year. Was one of the best things ive done. Already booked for the ring and black forest next june.
our trip went like
day 1 folkestone to calais, through belgium and Luxembourg to strasbourg.
day 2 strasbourg through to Switzerland then italy stelvio
day 3 stelvio back through Switzerland onto stuttgart
day 4 stuttgart to the ring
day 5 ring back through belgium then calais and home
next years will be
day 1 folkestone to calais straight to the ring
day 2 ring to baden baden black forest
day 3 black forest to Munich
day 4 munich to bmw and audi factory
day 5 munich to ring
day 6 enjoy day at ring
day 7 another ring day then calais and home