Take the Brenner motorway A22 to the Bressanone tollgate, then take the Val Pusteria state road SS49 towards Brunico.
At the San Lorenzo di Sebato junction, turn right and take the SS244 to Val Badia.
After about 8 km, you'll come to Longega; turn left towards San Vigilio di Marebbe and then left again towards Pieve di Marebbe.