Flixbus  http://www.flixbus.com Select „Bolzano“ as Destination
Südtirol Alto Adige Bus (Dolomites Airport Shuttle)  http://www.altoadigebus.com/ Select „Bolzano Stazione die Treni Area Taxi“ as Destination
Train  http://www.bahn.de Select „Bozen / Bolzano“ as Destination
If you are travelling by air you might also consider to book your flight to  Verona instead of Munich.  By train, Verona is only 1.5-2 hours far from Bozen.
With these alternative travel options you arrive at Bozen, about 15 kilometers away from Tiers. To get from Bozen to Tiers, you have two options: By taxi The taxi stand is situated at the  Central Station of Bozen. Taxi Phone: +39 0471 98 11 11 Approximate costs (Bozen-Tiers) € 60,- By public bus Here you will find the timetable for March 2022 (available end of 2021).