From Berlin Tegel (TXL) airport:
Take the S25 S-Bahn line towards Teltow Stadt. Alight at Friedrichstrasse. Take the RE1 regional bahn towards Magdeburg. Alight at Potsdam Hauptbahnhof (central station).
From Potsdam central train station:
By taxi the journey, of around 1km, will cost about EUR 6.
The hotel has 40 parking places (EUR 12 per night).